* [Qemu-devel] [PATCH v4 0/9] trace: Per-vCPU tracing states
@ 2016-01-15 16:37 Lluís Vilanova
2016-01-15 16:37 ` [Qemu-devel] [PATCH v4 1/9] trace: Add support for vCPU pointers in trace events Lluís Vilanova
` (8 more replies)
0 siblings, 9 replies; 13+ messages in thread
From: Lluís Vilanova @ 2016-01-15 16:37 UTC (permalink / raw)
To: qemu-devel; +Cc: Stefan Hajnoczi, Eduardo Habkost
NOTE: This series completes the framework for guest code tracing. Next series
will add actual events.
Provides per-vCPU dynamic controls of the tracing state of events tied to a
specific virtual CPU.
Events with the "vcpu" property are identified as being tied to a particular
virtual CPU, like executing an instruction. The state of such events can be
controlled idependently; this is specially useful to, for example, trace memory
access events of a process executing on a specific virtual CPU.
This event property plays in combination with the "tcg" property to avoid
generating a call to the execution-time event tracer when a vCPU is not actively
tracing such event (i.e., avoids adding tracing overheads).
Virtual CPUs tracing the same set of events use the same physical translation
cache, improving their reuse. The system has 2^N physical translation caches,
where "N" is the number of TCG events with the "vcpu" property. Every vCPU has a
bitmap with the states of these events, which can be controlled separately, and
uses it to select its physical translation cache. At translation time, QEMU
generates the code to trace an event at execution time only if the event is
enabled.
Changes in v4
=============
* Fix typo in commit message (Stefan Hajnoczi).
* Simplify per-vCPU tracing state initialization (Stefan Hajnoczi).
* Update copyright years.
Changes in v3
=============
* Update QAPI version (Eric Blake).
* Fix '#optional' annotation in QAPI (Eric Blake).
Changes in v2
=============
* Rebase on 5522a84.
* Improve patch descriptions.
* Refactor code generation into a separate patch.
* Fix forward declarations (Stefan Hajnoczi & Eduardo Habkost).
* Fix "since" tags in QAPI interface (Eric Blake).
* Unify QAPI/QMP interface with an optional 'vcpu' argument (Eric Blake).
* Fix QMP+GTK header workaround (Stefan Hajnoczi).
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
---
Lluís Vilanova (9):
trace: Add support for vCPU pointers in trace events
trace: Add 'vcpu' event property
trace: [tcg] Identify events with the 'vcpu' property
exec: [tcg] Refactor flush of per-CPU virtual TB cache
exec: [tcg] Use multiple physical TB caches
exec: [tcg] Track which vCPU is performing translation and execution
disas: Remove unused macro '_'
trace: [tcg] Add per-vCPU tracing states for events with the 'vcpu' property
trace: [tcg] Generate TCG code to trace guest events on a per-vCPU basis
Makefile.objs | 1
bsd-user/main.c | 2
cpu-exec.c | 17 +++
cputlb.c | 2
disas/i386.c | 2
docs/tracing.txt | 40 ++++++++
include/disas/bfd.h | 1
include/exec/exec-all.h | 16 +++
include/qemu/typedefs.h | 1
include/qom/cpu.h | 15 +++
linux-user/main.c | 2
monitor.c | 4 -
qapi/trace.json | 16 ++-
qmp-commands.hx | 17 +++
qom/cpu.c | 9 ++
scripts/tracetool/__init__.py | 24 ++++-
scripts/tracetool/format/events_c.py | 11 ++
scripts/tracetool/format/events_h.py | 14 ++-
scripts/tracetool/format/h.py | 4 +
scripts/tracetool/format/tcg_h.py | 21 +++-
scripts/tracetool/format/tcg_helper_c.py | 11 ++
scripts/tracetool/format/ust_events_c.py | 1
scripts/tracetool/transform.py | 9 ++
target-alpha/translate.c | 3 -
target-arm/translate.c | 3 -
target-arm/translate.h | 2
target-cris/translate.c | 3 -
target-cris/translate_v10.c | 1
target-i386/translate.c | 3 -
target-lm32/translate.c | 3 -
target-m68k/translate.c | 3 -
target-microblaze/translate.c | 3 -
target-mips/translate.c | 3 -
target-moxie/translate.c | 3 -
target-openrisc/translate.c | 3 -
target-ppc/translate.c | 3 -
target-s390x/translate.c | 3 -
target-sh4/translate.c | 3 -
target-sparc/translate.c | 6 +
target-tilegx/translate.c | 3 -
target-tricore/translate.c | 3 -
target-unicore32/translate.c | 3 -
target-xtensa/translate.c | 3 -
tcg/tcg-op.h | 2
tcg/tcg.h | 10 ++
trace/Makefile.objs | 2
trace/control-internal.h | 21 +++-
trace/control-stub.c | 29 ++++++
trace/control-target.c | 69 +++++++++++++
trace/control.c | 17 +++
trace/control.h | 65 ++++++++++++-
trace/event-internal.h | 6 +
trace/qmp.c | 139 ++++++++++++++++++++++-----
translate-all.c | 156 ++++++++++++++++++++++++++----
translate-all.h | 49 +++++++++
vl.c | 1
56 files changed, 758 insertions(+), 108 deletions(-)
create mode 100644 trace/control-stub.c
create mode 100644 trace/control-target.c
To: qemu-devel@nongnu.org
Cc: Stefan Hajnoczi <stefanha@gmail.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Eric Blake <eblake@redhat.com>
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Qemu-devel] [PATCH v4 1/9] trace: Add support for vCPU pointers in trace events
2016-01-15 16:37 [Qemu-devel] [PATCH v4 0/9] trace: Per-vCPU tracing states Lluís Vilanova
@ 2016-01-15 16:37 ` Lluís Vilanova
2016-01-15 16:38 ` [Qemu-devel] [PATCH v4 2/9] trace: Add 'vcpu' event property Lluís Vilanova
` (7 subsequent siblings)
8 siblings, 0 replies; 13+ messages in thread
From: Lluís Vilanova @ 2016-01-15 16:37 UTC (permalink / raw)
To: qemu-devel
Cc: Peter Maydell, Guan Xuetao, open list:ARM, Eduardo Habkost,
Stefan Hajnoczi, Anthony Green, Mark Cave-Ayland, Jia Liu,
Alexander Graf, Blue Swirl, Max Filippov, Michael Walle,
Leon Alrae, open list:PowerPC, Stefan Hajnoczi, Paolo Bonzini,
Edgar E. Iglesias, Bastian Koppelmann, Aurelien Jarno,
Richard Henderson
The tracing infrastructure later needs to differentiate between regular
pointers and pointers to vCPUs.
Also changes all targets to use the new 'TCGv_cpu' type instead of the
generic 'TCGv_ptr'. As of now, the change is merely cosmetic ('TCGv_cpu'
translates into 'TCGv_ptr'), but that could change in the future to
enforce the difference.
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
---
include/qemu/typedefs.h | 1 +
scripts/tracetool/transform.py | 9 ++++++++-
target-alpha/translate.c | 2 +-
target-arm/translate.c | 2 +-
target-arm/translate.h | 2 +-
target-cris/translate.c | 2 +-
target-i386/translate.c | 2 +-
target-lm32/translate.c | 2 +-
target-m68k/translate.c | 2 +-
target-microblaze/translate.c | 2 +-
target-mips/translate.c | 2 +-
target-moxie/translate.c | 2 +-
target-openrisc/translate.c | 2 +-
target-ppc/translate.c | 2 +-
target-s390x/translate.c | 2 +-
target-sh4/translate.c | 2 +-
target-sparc/translate.c | 5 +++--
target-tilegx/translate.c | 2 +-
target-tricore/translate.c | 2 +-
target-unicore32/translate.c | 2 +-
target-xtensa/translate.c | 2 +-
tcg/tcg-op.h | 2 --
tcg/tcg.h | 6 ++++++
trace/control.h | 3 ++-
24 files changed, 38 insertions(+), 24 deletions(-)
diff --git a/include/qemu/typedefs.h b/include/qemu/typedefs.h
index 78fe6e8..efbc8a9 100644
--- a/include/qemu/typedefs.h
+++ b/include/qemu/typedefs.h
@@ -18,6 +18,7 @@ typedef struct BusState BusState;
typedef struct CharDriverState CharDriverState;
typedef struct CompatProperty CompatProperty;
typedef struct CPUAddressSpace CPUAddressSpace;
+typedef struct CPUState CPUState;
typedef struct DeviceListener DeviceListener;
typedef struct DeviceState DeviceState;
typedef struct DisplayChangeListener DisplayChangeListener;
diff --git a/scripts/tracetool/transform.py b/scripts/tracetool/transform.py
index fc5e679..8a43a4e 100644
--- a/scripts/tracetool/transform.py
+++ b/scripts/tracetool/transform.py
@@ -6,7 +6,7 @@ Type-transformation rules.
"""
__author__ = "Lluís Vilanova <vilanova@ac.upc.edu>"
-__copyright__ = "Copyright 2012-2014, Lluís Vilanova <vilanova@ac.upc.edu>"
+__copyright__ = "Copyright 2012-2016, Lluís Vilanova <vilanova@ac.upc.edu>"
__license__ = "GPL version 2 or (at your option) any later version"
__maintainer__ = "Stefan Hajnoczi"
@@ -74,6 +74,7 @@ TCG_2_HOST = {
"TCGv_i32": "uint32_t",
"TCGv_i64": "uint64_t",
"TCGv_ptr": "void *",
+ "TCGv_cpu": "CPUState *",
None: _tcg_2_host,
}
@@ -98,6 +99,7 @@ HOST_2_TCG = {
"uint32_t": "TCGv_i32",
"uint64_t": "TCGv_i64",
"void *" : "TCGv_ptr",
+ "CPUState *": "TCGv_cpu",
None: _host_2_tcg,
}
@@ -115,6 +117,8 @@ TCG_2_TCG_HELPER_DEF = {
"TCGv_i32": "uint32_t",
"TCGv_i64": "uint64_t",
"TCGv_ptr": "void *",
+ "TCGv_cpu": "void *",
+ "CPUState *": "void *",
None: _tcg_2_helper_def,
}
@@ -130,6 +134,7 @@ TCG_2_TCG_HELPER_DECL = {
"TCGv_ptr": "ptr",
"TCGv_i32": "i32",
"TCGv_i64": "i64",
+ "TCGv_cpu": "ptr",
None: _tcg_2_tcg_helper_decl_error,
}
@@ -146,6 +151,7 @@ HOST_2_TCG_TMP_NEW = {
"uint32_t": "tcg_const_i32",
"uint64_t": "tcg_const_i64",
"void *" : "tcg_const_ptr",
+ "CPUState *": "tcg_const_ptr",
None: _host_2_tcg_tmp_new,
}
@@ -162,5 +168,6 @@ HOST_2_TCG_TMP_FREE = {
"uint32_t": "tcg_temp_free_i32",
"uint64_t": "tcg_temp_free_i64",
"void *" : "tcg_temp_free_ptr",
+ "CPUState *": "tcg_temp_free_ptr",
None: _host_2_tcg_tmp_free,
}
diff --git a/target-alpha/translate.c b/target-alpha/translate.c
index 9909c70..d631f74 100644
--- a/target-alpha/translate.c
+++ b/target-alpha/translate.c
@@ -91,7 +91,7 @@ typedef enum {
} ExitStatus;
/* global register indexes */
-static TCGv_ptr cpu_env;
+static TCGv_cpu cpu_env;
static TCGv cpu_std_ir[31];
static TCGv cpu_fir[31];
static TCGv cpu_pc;
diff --git a/target-arm/translate.c b/target-arm/translate.c
index d485e7d..b90b932 100644
--- a/target-arm/translate.c
+++ b/target-arm/translate.c
@@ -59,7 +59,7 @@
#define IS_USER(s) (s->user)
#endif
-TCGv_ptr cpu_env;
+TCGv_cpu cpu_env;
/* We reuse the same 64-bit temporaries for efficiency. */
static TCGv_i64 cpu_V0, cpu_V1, cpu_M0;
static TCGv_i32 cpu_R[16];
diff --git a/target-arm/translate.h b/target-arm/translate.h
index 53ef971..6e8eb7d 100644
--- a/target-arm/translate.h
+++ b/target-arm/translate.h
@@ -70,7 +70,7 @@ typedef struct DisasCompare {
} DisasCompare;
/* Share the TCG temporaries common between 32 and 64 bit modes. */
-extern TCGv_ptr cpu_env;
+extern TCGv_cpu cpu_env;
extern TCGv_i32 cpu_NF, cpu_ZF, cpu_CF, cpu_VF;
extern TCGv_i64 cpu_exclusive_addr;
extern TCGv_i64 cpu_exclusive_val;
diff --git a/target-cris/translate.c b/target-cris/translate.c
index 2429931..5ce5c58 100644
--- a/target-cris/translate.c
+++ b/target-cris/translate.c
@@ -58,7 +58,7 @@
#define CC_MASK_NZVC 0xf
#define CC_MASK_RNZV 0x10e
-static TCGv_ptr cpu_env;
+static TCGv_cpu cpu_env;
static TCGv cpu_R[16];
static TCGv cpu_PR[16];
static TCGv cc_x;
diff --git a/target-i386/translate.c b/target-i386/translate.c
index a3dd167..53a09f8 100644
--- a/target-i386/translate.c
+++ b/target-i386/translate.c
@@ -62,7 +62,7 @@
//#define MACRO_TEST 1
/* global register indexes */
-static TCGv_ptr cpu_env;
+static TCGv_cpu cpu_env;
static TCGv cpu_A0;
static TCGv cpu_cc_dst, cpu_cc_src, cpu_cc_src2, cpu_cc_srcT;
static TCGv_i32 cpu_cc_op;
diff --git a/target-lm32/translate.c b/target-lm32/translate.c
index fa5b0b9..a333fc6 100644
--- a/target-lm32/translate.c
+++ b/target-lm32/translate.c
@@ -42,7 +42,7 @@
#define MEM_INDEX 0
-static TCGv_ptr cpu_env;
+static TCGv_cpu cpu_env;
static TCGv cpu_R[32];
static TCGv cpu_pc;
static TCGv cpu_ie;
diff --git a/target-m68k/translate.c b/target-m68k/translate.c
index 41ae2c6..d68d615 100644
--- a/target-m68k/translate.c
+++ b/target-m68k/translate.c
@@ -48,7 +48,7 @@
static TCGv_i32 cpu_halted;
static TCGv_i32 cpu_exception_index;
-static TCGv_ptr cpu_env;
+static TCGv_cpu cpu_env;
static char cpu_reg_names[3*8*3 + 5*4];
static TCGv cpu_dregs[8];
diff --git a/target-microblaze/translate.c b/target-microblaze/translate.c
index 9e52011..3e3a49d 100644
--- a/target-microblaze/translate.c
+++ b/target-microblaze/translate.c
@@ -44,7 +44,7 @@
(((src) >> start) & ((1 << (end - start + 1)) - 1))
static TCGv env_debug;
-static TCGv_ptr cpu_env;
+static TCGv_cpu cpu_env;
static TCGv cpu_R[32];
static TCGv cpu_SR[18];
static TCGv env_imm;
diff --git a/target-mips/translate.c b/target-mips/translate.c
index 5626647..610ed7c 100644
--- a/target-mips/translate.c
+++ b/target-mips/translate.c
@@ -1351,7 +1351,7 @@ enum {
};
/* global register indices */
-static TCGv_ptr cpu_env;
+static TCGv_cpu cpu_env;
static TCGv cpu_gpr[32], cpu_PC;
static TCGv cpu_HI[MIPS_DSP_ACC], cpu_LO[MIPS_DSP_ACC];
static TCGv cpu_dspctrl, btarget, bcond;
diff --git a/target-moxie/translate.c b/target-moxie/translate.c
index 6dedcb7..ab8f6a7 100644
--- a/target-moxie/translate.c
+++ b/target-moxie/translate.c
@@ -59,7 +59,7 @@ enum {
static TCGv cpu_pc;
static TCGv cpu_gregs[16];
-static TCGv_ptr cpu_env;
+static TCGv_cpu cpu_env;
static TCGv cc_a, cc_b;
#include "exec/gen-icount.h"
diff --git a/target-openrisc/translate.c b/target-openrisc/translate.c
index 606490a..3d29369 100644
--- a/target-openrisc/translate.c
+++ b/target-openrisc/translate.c
@@ -52,7 +52,7 @@ typedef struct DisasContext {
uint32_t delayed_branch;
} DisasContext;
-static TCGv_ptr cpu_env;
+static TCGv_cpu cpu_env;
static TCGv cpu_sr;
static TCGv cpu_R[32];
static TCGv cpu_pc;
diff --git a/target-ppc/translate.c b/target-ppc/translate.c
index 4be7eaa..204cb3a 100644
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -47,7 +47,7 @@
/* Code translation helpers */
/* global register indexes */
-static TCGv_ptr cpu_env;
+static TCGv_cpu cpu_env;
static char cpu_reg_names[10*3 + 22*4 /* GPR */
+ 10*4 + 22*5 /* SPE GPRh */
+ 10*4 + 22*5 /* FPR */
diff --git a/target-s390x/translate.c b/target-s390x/translate.c
index c79a2cb..262da89 100644
--- a/target-s390x/translate.c
+++ b/target-s390x/translate.c
@@ -36,7 +36,7 @@
#include "exec/cpu_ldst.h"
/* global register indexes */
-static TCGv_ptr cpu_env;
+static TCGv_cpu cpu_env;
#include "exec/gen-icount.h"
#include "exec/helper-proto.h"
diff --git a/target-sh4/translate.c b/target-sh4/translate.c
index 7bc6216..c3a8fbd 100644
--- a/target-sh4/translate.c
+++ b/target-sh4/translate.c
@@ -59,7 +59,7 @@ enum {
};
/* global register indexes */
-static TCGv_ptr cpu_env;
+static TCGv_cpu cpu_env;
static TCGv cpu_gregs[24];
static TCGv cpu_sr, cpu_sr_m, cpu_sr_q, cpu_sr_t;
static TCGv cpu_pc, cpu_ssr, cpu_spc, cpu_gbr;
diff --git a/target-sparc/translate.c b/target-sparc/translate.c
index f99ceed..44fdff8 100644
--- a/target-sparc/translate.c
+++ b/target-sparc/translate.c
@@ -42,7 +42,8 @@
according to jump_pc[T2] */
/* global register indexes */
-static TCGv_ptr cpu_env, cpu_regwptr;
+static TCGv_cpu cpu_env;
+static TCGv_ptr cpu_regwptr;
static TCGv cpu_cc_src, cpu_cc_src2, cpu_cc_dst;
static TCGv_i32 cpu_cc_op;
static TCGv_i32 cpu_psr;
@@ -2294,7 +2295,7 @@ static void gen_fmovq(DisasContext *dc, DisasCompare *cmp, int rd, int rs)
}
#ifndef CONFIG_USER_ONLY
-static inline void gen_load_trap_state_at_tl(TCGv_ptr r_tsptr, TCGv_ptr cpu_env)
+static inline void gen_load_trap_state_at_tl(TCGv_ptr r_tsptr, TCGv_cpu cpu_env)
{
TCGv_i32 r_tl = tcg_temp_new_i32();
diff --git a/target-tilegx/translate.c b/target-tilegx/translate.c
index 354f25a..fb5413a 100644
--- a/target-tilegx/translate.c
+++ b/target-tilegx/translate.c
@@ -30,7 +30,7 @@
#define FMT64X "%016" PRIx64
-static TCGv_ptr cpu_env;
+static TCGv_cpu cpu_env;
static TCGv cpu_pc;
static TCGv cpu_regs[TILEGX_R_COUNT];
diff --git a/target-tricore/translate.c b/target-tricore/translate.c
index 135c583..655db75 100644
--- a/target-tricore/translate.c
+++ b/target-tricore/translate.c
@@ -45,7 +45,7 @@ static TCGv cpu_PSW_SV;
static TCGv cpu_PSW_AV;
static TCGv cpu_PSW_SAV;
/* CPU env */
-static TCGv_ptr cpu_env;
+static TCGv_cpu cpu_env;
#include "exec/gen-icount.h"
diff --git a/target-unicore32/translate.c b/target-unicore32/translate.c
index d2f92f0..29c22f5 100644
--- a/target-unicore32/translate.c
+++ b/target-unicore32/translate.c
@@ -51,7 +51,7 @@ typedef struct DisasContext {
conditional executions state has been updated. */
#define DISAS_SYSCALL 5
-static TCGv_ptr cpu_env;
+static TCGv_cpu cpu_env;
static TCGv_i32 cpu_R[32];
/* FIXME: These should be removed. */
diff --git a/target-xtensa/translate.c b/target-xtensa/translate.c
index fbcec94..ce0f717 100644
--- a/target-xtensa/translate.c
+++ b/target-xtensa/translate.c
@@ -73,7 +73,7 @@ typedef struct DisasContext {
unsigned cpenable;
} DisasContext;
-static TCGv_ptr cpu_env;
+static TCGv_cpu cpu_env;
static TCGv_i32 cpu_pc;
static TCGv_i32 cpu_R[16];
static TCGv_i32 cpu_FR[16];
diff --git a/tcg/tcg-op.h b/tcg/tcg-op.h
index 6966672..8669d0b 100644
--- a/tcg/tcg-op.h
+++ b/tcg/tcg-op.h
@@ -756,7 +756,6 @@ static inline void tcg_gen_exit_tb(uintptr_t val)
void tcg_gen_goto_tb(unsigned idx);
#if TARGET_LONG_BITS == 32
-#define TCGv TCGv_i32
#define TCGv_promise TCGv_promise_i32
#define tcg_temp_new() tcg_temp_new_i32()
#define tcg_global_reg_new tcg_global_reg_new_i32
@@ -769,7 +768,6 @@ void tcg_gen_goto_tb(unsigned idx);
#define tcg_gen_qemu_ld_tl tcg_gen_qemu_ld_i32
#define tcg_gen_qemu_st_tl tcg_gen_qemu_st_i32
#else
-#define TCGv TCGv_i64
#define TCGv_promise TCGv_promise_i64
#define tcg_temp_new() tcg_temp_new_i64()
#define tcg_global_reg_new tcg_global_reg_new_i64
diff --git a/tcg/tcg.h b/tcg/tcg.h
index 79e83c8..8bed171 100644
--- a/tcg/tcg.h
+++ b/tcg/tcg.h
@@ -311,6 +311,12 @@ typedef struct TCGv_ptr_d *TCGv_ptr;
typedef struct TCGv_promise_i32_d *TCGv_promise_i32;
typedef struct TCGv_promise_i64_d *TCGv_promise_i64;
typedef struct TCGv_promise_ptr_d *TCGv_promise_ptr;
+typedef TCGv_ptr TCGv_cpu;
+#if TARGET_LONG_BITS == 32
+typedef TCGv_i32 TCGv;
+#else /* TARGET_LONG_BITS == 64 */
+typedef TCGv_i64 TCGv;
+#endif
static inline TCGv_i32 QEMU_ARTIFICIAL MAKE_TCGV_I32(intptr_t i)
{
diff --git a/trace/control.h b/trace/control.h
index da9bb6b..766fdad 100644
--- a/trace/control.h
+++ b/trace/control.h
@@ -1,7 +1,7 @@
/*
* Interface for configuring and controlling the state of tracing events.
*
- * Copyright (C) 2011-2014 Lluís Vilanova <vilanova@ac.upc.edu>
+ * Copyright (C) 2011-2016 Lluís Vilanova <vilanova@ac.upc.edu>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
@@ -11,6 +11,7 @@
#define TRACE__CONTROL_H
#include "qemu-common.h"
+#include "qemu/typedefs.h"
#include "trace/generated-events.h"
^ permalink raw reply related [flat|nested] 13+ messages in thread
* [Qemu-devel] [PATCH v4 2/9] trace: Add 'vcpu' event property
2016-01-15 16:37 [Qemu-devel] [PATCH v4 0/9] trace: Per-vCPU tracing states Lluís Vilanova
2016-01-15 16:37 ` [Qemu-devel] [PATCH v4 1/9] trace: Add support for vCPU pointers in trace events Lluís Vilanova
@ 2016-01-15 16:38 ` Lluís Vilanova
2016-01-15 16:38 ` [Qemu-devel] [PATCH v4 3/9] trace: [tcg] Identify events with the 'vcpu' property Lluís Vilanova
` (6 subsequent siblings)
8 siblings, 0 replies; 13+ messages in thread
From: Lluís Vilanova @ 2016-01-15 16:38 UTC (permalink / raw)
To: qemu-devel; +Cc: Stefan Hajnoczi, Eduardo Habkost, Stefan Hajnoczi
This property identifies events that trace vCPU-specific information.
It adds a "CPUState*" argument to events with the property, identifying
the vCPU raising the event. TCG translation events also have a
"TCGv_cpu" implicit argument that is later used as the "CPUState*"
argument at execution time.
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
---
docs/tracing.txt | 40 ++++++++++++++++++++++++++++++
scripts/tracetool/__init__.py | 24 +++++++++++++++++-
scripts/tracetool/format/h.py | 3 ++
scripts/tracetool/format/tcg_h.py | 13 ++++++++--
scripts/tracetool/format/ust_events_c.py | 1 +
5 files changed, 75 insertions(+), 6 deletions(-)
diff --git a/docs/tracing.txt b/docs/tracing.txt
index 3853a6a..ade39e0 100644
--- a/docs/tracing.txt
+++ b/docs/tracing.txt
@@ -347,3 +347,43 @@ This will immediately call:
and will generate the TCG code to call:
void trace_foo(uint8_t a1, uint32_t a2);
+
+=== "vcpu" ===
+
+Identifies events that trace vCPU-specific information. The property adds a
+"CPUState*" argument that identifies the vCPU raising the event. If used
+together with the "tcg" property, it adds a second "TCGv_cpu" argument that
+identifies the vCPU when guest code is executed.
+
+The following example events:
+
+ foo(uint32_t a) "a=%x"
+ vcpu bar(uint32_t a) "cpu=%p a=%x"
+ tcg vcpu baz(uint32_t a) "cpu=%p a=%x", "cpu=%p a=%x"
+
+Can be used as:
+
+ #include "trace-tcg.h"
+
+ CPUArchState *env;
+ TCGv_ptr cpu_env;
+
+ void some_disassembly_func(...)
+ {
+ /* trace emitted at this point */
+ trace_foo(0xd1);
+ /* trace emitted at this point */
+ trace_bar(ENV_GET_CPU(env), 0xd2);
+ /* trace emitted at this point (env) and when guest code is executed (cpu_env) */
+ trace_baz_tcg(ENV_GET_CPU(env), cpu_env, 0xd3);
+ }
+
+If we assume code is translated by the vCPU with address 0xc1 and executed by
+the vCPU with address 0xc2, this would be an example output:
+
+ // at guest code translation
+ foo a=0xd1
+ bar cpu=0xc1 a=0xd2
+ baz_trans cpu=0xc1 a=0xd3
+ // at guest code execution
+ baz_exec cpu=0xc2 a=0xd3
diff --git a/scripts/tracetool/__init__.py b/scripts/tracetool/__init__.py
index 181675f..41feb23 100644
--- a/scripts/tracetool/__init__.py
+++ b/scripts/tracetool/__init__.py
@@ -6,7 +6,7 @@ Machinery for generating tracing-related intermediate files.
"""
__author__ = "Lluís Vilanova <vilanova@ac.upc.edu>"
-__copyright__ = "Copyright 2012-2014, Lluís Vilanova <vilanova@ac.upc.edu>"
+__copyright__ = "Copyright 2012-2016, Lluís Vilanova <vilanova@ac.upc.edu>"
__license__ = "GPL version 2 or (at your option) any later version"
__maintainer__ = "Stefan Hajnoczi"
@@ -146,7 +146,7 @@ class Event(object):
"(?:(?:(?P<fmt_trans>\".+),)?\s*(?P<fmt>\".+))?"
"\s*")
- _VALID_PROPS = set(["disable", "tcg", "tcg-trans", "tcg-exec"])
+ _VALID_PROPS = set(["disable", "tcg", "tcg-trans", "tcg-exec", "vcpu"])
def __init__(self, name, props, fmt, args, orig=None):
"""
@@ -215,6 +215,19 @@ class Event(object):
if "tcg" in props and isinstance(fmt, str):
raise ValueError("Events with 'tcg' property must have two formats")
+ # add implicit arguments when using the 'vcpu' property
+ if "vcpu" in props:
+ assert "tcg-trans" not in props and "tcg-exec" not in props
+ # events with 'tcg-trans' and 'tcg-exec' are auto-generated, they
+ # have already been transformed
+ if "tcg" in props:
+ types = ["TCGv_cpu"] + args.types()
+ names = ["_tcg_cpu"] + args.names()
+ else:
+ types = ["CPUState *"] + args.types()
+ names = ["_cpu"] + args.names()
+ args = Arguments(zip(types, names))
+
return Event(name, props, fmt, args)
def __repr__(self):
@@ -270,6 +283,7 @@ def _read_events(fobj):
event_trans.name += "_trans"
event_trans.properties += ["tcg-trans"]
event_trans.fmt = event.fmt[0]
+ # ignore TCG arguments
args_trans = []
for atrans, aorig in zip(
event_trans.transform(tracetool.transform.TCG_2_HOST).args,
@@ -279,6 +293,12 @@ def _read_events(fobj):
event_trans.args = Arguments(args_trans)
event_trans = event_trans.copy()
+ # trace the vCPU performing the translation
+ if "vcpu" in event_trans.properties:
+ event_trans.args = Arguments(zip(
+ ["CPUState *"] + list(event_trans.args.types()),
+ ["_cpu"] + list(event_trans.args.names())))
+
event_exec = event.copy()
event_exec.name += "_exec"
event_exec.properties += ["tcg-exec"]
diff --git a/scripts/tracetool/format/h.py b/scripts/tracetool/format/h.py
index 9b39430..2bd68a2 100644
--- a/scripts/tracetool/format/h.py
+++ b/scripts/tracetool/format/h.py
@@ -6,7 +6,7 @@ trace/generated-tracers.h
"""
__author__ = "Lluís Vilanova <vilanova@ac.upc.edu>"
-__copyright__ = "Copyright 2012-2014, Lluís Vilanova <vilanova@ac.upc.edu>"
+__copyright__ = "Copyright 2012-2016, Lluís Vilanova <vilanova@ac.upc.edu>"
__license__ = "GPL version 2 or (at your option) any later version"
__maintainer__ = "Stefan Hajnoczi"
@@ -23,6 +23,7 @@ def generate(events, backend):
'#define TRACE__GENERATED_TRACERS_H',
'',
'#include "qemu-common.h"',
+ '#include "qemu/typedefs.h"',
'')
backend.generate_begin(events)
diff --git a/scripts/tracetool/format/tcg_h.py b/scripts/tracetool/format/tcg_h.py
index f676b66..acaa963 100644
--- a/scripts/tracetool/format/tcg_h.py
+++ b/scripts/tracetool/format/tcg_h.py
@@ -6,14 +6,14 @@ Generate .h file for TCG code generation.
"""
__author__ = "Lluís Vilanova <vilanova@ac.upc.edu>"
-__copyright__ = "Copyright 2012-2014, Lluís Vilanova <vilanova@ac.upc.edu>"
+__copyright__ = "Copyright 2012-2016, Lluís Vilanova <vilanova@ac.upc.edu>"
__license__ = "GPL version 2 or (at your option) any later version"
__maintainer__ = "Stefan Hajnoczi"
__email__ = "stefanha@linux.vnet.ibm.com"
-from tracetool import out
+from tracetool import out, Arguments
def generate(events, backend):
@@ -38,10 +38,17 @@ def generate(events, backend):
# get the original event definition
e = e.original.original
+ if "vcpu" in e.properties:
+ args_api = Arguments(zip(
+ ["CPUState *"] + e.args.types(),
+ ["_cpu"] + e.args.names()))
+ else:
+ args_api = e.args
+
out('static inline void %(name_tcg)s(%(args)s)',
'{',
name_tcg=e.api(e.QEMU_TRACE_TCG),
- args=e.args)
+ args=args_api)
if "disable" not in e.properties:
out(' %(name_trans)s(%(argnames_trans)s);',
diff --git a/scripts/tracetool/format/ust_events_c.py b/scripts/tracetool/format/ust_events_c.py
index bc97093..ecb1f23 100644
--- a/scripts/tracetool/format/ust_events_c.py
+++ b/scripts/tracetool/format/ust_events_c.py
@@ -30,4 +30,5 @@ def generate(events, backend):
' */',
'#pragma GCC diagnostic ignored "-Wredundant-decls"',
'',
+ '#include "qemu/typedefs.h"',
'#include "generated-ust-provider.h"')
^ permalink raw reply related [flat|nested] 13+ messages in thread
* [Qemu-devel] [PATCH v4 3/9] trace: [tcg] Identify events with the 'vcpu' property
2016-01-15 16:37 [Qemu-devel] [PATCH v4 0/9] trace: Per-vCPU tracing states Lluís Vilanova
2016-01-15 16:37 ` [Qemu-devel] [PATCH v4 1/9] trace: Add support for vCPU pointers in trace events Lluís Vilanova
2016-01-15 16:38 ` [Qemu-devel] [PATCH v4 2/9] trace: Add 'vcpu' event property Lluís Vilanova
@ 2016-01-15 16:38 ` Lluís Vilanova
2016-01-15 16:38 ` [Qemu-devel] [PATCH v4 4/9] exec: [tcg] Refactor flush of per-CPU virtual TB cache Lluís Vilanova
` (5 subsequent siblings)
8 siblings, 0 replies; 13+ messages in thread
From: Lluís Vilanova @ 2016-01-15 16:38 UTC (permalink / raw)
To: qemu-devel
Cc: Stefan Hajnoczi, Eduardo Habkost, Stefan Hajnoczi, Markus Armbruster
A separate ID space ('TRACE_CPU_*') is used in attribute 'cpu_id' that
only contains events with the 'vcpu' property.
These are later used to select the appropriate physical TB cache based
on what events are active.
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
---
qapi/trace.json | 5 +++--
scripts/tracetool/format/events_c.py | 11 +++++++++--
scripts/tracetool/format/events_h.py | 14 ++++++++++++--
trace/control-internal.h | 8 +++++++-
trace/control.h | 7 +++++++
trace/event-internal.h | 4 +++-
trace/qmp.c | 3 ++-
7 files changed, 43 insertions(+), 9 deletions(-)
diff --git a/qapi/trace.json b/qapi/trace.json
index 01b0a52..84c34dd 100644
--- a/qapi/trace.json
+++ b/qapi/trace.json
@@ -1,6 +1,6 @@
# -*- mode: python -*-
#
-# Copyright (C) 2011-2014 Lluís Vilanova <vilanova@ac.upc.edu>
+# Copyright (C) 2011-2016 Lluís Vilanova <vilanova@ac.upc.edu>
#
# This work is licensed under the terms of the GNU GPL, version 2 or later.
# See the COPYING file in the top-level directory.
@@ -29,11 +29,12 @@
#
# @name: Event name.
# @state: Tracing state.
+# @vcpu: Whether this is a per-vCPU event (since 2.6).
#
# Since 2.2
##
{ 'struct': 'TraceEventInfo',
- 'data': {'name': 'str', 'state': 'TraceEventState'} }
+ 'data': {'name': 'str', 'state': 'TraceEventState', 'vcpu': 'bool'} }
##
# @trace-event-get-state:
diff --git a/scripts/tracetool/format/events_c.py b/scripts/tracetool/format/events_c.py
index 2d97fa3..fbfb9b1 100644
--- a/scripts/tracetool/format/events_c.py
+++ b/scripts/tracetool/format/events_c.py
@@ -6,7 +6,7 @@ trace/generated-events.c
"""
__author__ = "Lluís Vilanova <vilanova@ac.upc.edu>"
-__copyright__ = "Copyright 2012-2014, Lluís Vilanova <vilanova@ac.upc.edu>"
+__copyright__ = "Copyright 2012-2016, Lluís Vilanova <vilanova@ac.upc.edu>"
__license__ = "GPL version 2 or (at your option) any later version"
__maintainer__ = "Stefan Hajnoczi"
@@ -27,8 +27,15 @@ def generate(events, backend):
out('TraceEvent trace_events[TRACE_EVENT_COUNT] = {')
for e in events:
- out(' { .id = %(id)s, .name = \"%(name)s\", .sstate = %(sstate)s, .dstate = 0 },',
+ if "vcpu" in e.properties and "tcg-exec" in e.properties:
+ vcpu_id = "TRACE_CPU_" + e.name.upper()
+ else:
+ vcpu_id = "TRACE_CPU_EVENT_COUNT"
+ out(' { .id = %(id)s, .cpu_id = %(vcpu_id)s,'
+ ' .name = \"%(name)s\",'
+ ' .sstate = %(sstate)s, .dstate = 0 },',
id = "TRACE_" + e.name.upper(),
+ vcpu_id = vcpu_id,
name = e.name,
sstate = "TRACE_%s_ENABLED" % e.name.upper())
diff --git a/scripts/tracetool/format/events_h.py b/scripts/tracetool/format/events_h.py
index 9f114a3..9c5aee4 100644
--- a/scripts/tracetool/format/events_h.py
+++ b/scripts/tracetool/format/events_h.py
@@ -6,7 +6,7 @@ trace/generated-events.h
"""
__author__ = "Lluís Vilanova <vilanova@ac.upc.edu>"
-__copyright__ = "Copyright 2012-2014, Lluís Vilanova <vilanova@ac.upc.edu>"
+__copyright__ = "Copyright 2012-2016, Lluís Vilanova <vilanova@ac.upc.edu>"
__license__ = "GPL version 2 or (at your option) any later version"
__maintainer__ = "Stefan Hajnoczi"
@@ -34,13 +34,23 @@ def generate(events, backend):
out(' TRACE_EVENT_COUNT',
'} TraceEventID;')
+ # per-vCPU event identifiers
+ out('typedef enum {')
+
+ for e in events:
+ if "vcpu" in e.properties and "tcg-exec" in e.properties:
+ out(' TRACE_CPU_%s,' % e.name.upper())
+
+ out(' TRACE_CPU_EVENT_COUNT',
+ '} TraceEventCPUID;')
+
# static state
for e in events:
if 'disable' in e.properties:
enabled = 0
else:
enabled = 1
- if "tcg-trans" in e.properties:
+ if "tcg-exec" in e.properties:
# a single define for the two "sub-events"
out('#define TRACE_%(name)s_ENABLED %(enabled)d',
name=e.original.original.name.upper(),
diff --git a/trace/control-internal.h b/trace/control-internal.h
index 5a8df28..ab42396 100644
--- a/trace/control-internal.h
+++ b/trace/control-internal.h
@@ -1,7 +1,7 @@
/*
* Interface for configuring and controlling the state of tracing events.
*
- * Copyright (C) 2011-2014 Lluís Vilanova <vilanova@ac.upc.edu>
+ * Copyright (C) 2011-2016 Lluís Vilanova <vilanova@ac.upc.edu>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
@@ -39,6 +39,12 @@ static inline TraceEventID trace_event_get_id(TraceEvent *ev)
return ev->id;
}
+static inline TraceEventCPUID trace_event_get_cpu_id(TraceEvent *ev)
+{
+ assert(ev != NULL);
+ return ev->cpu_id;
+}
+
static inline const char * trace_event_get_name(TraceEvent *ev)
{
assert(ev != NULL);
diff --git a/trace/control.h b/trace/control.h
index 766fdad..860beed 100644
--- a/trace/control.h
+++ b/trace/control.h
@@ -87,6 +87,13 @@ static TraceEventID trace_event_count(void);
static TraceEventID trace_event_get_id(TraceEvent *ev);
/**
+ * trace_event_get_cpu_id:
+ *
+ * Get the per-vCPU identifier of an event.
+ */
+static TraceEventCPUID trace_event_get_cpu_id(TraceEvent *ev);
+
+/**
* trace_event_get_name:
*
* Get the name of an event.
diff --git a/trace/event-internal.h b/trace/event-internal.h
index b2310d9..258bcde 100644
--- a/trace/event-internal.h
+++ b/trace/event-internal.h
@@ -1,7 +1,7 @@
/*
* Interface for configuring and controlling the state of tracing events.
*
- * Copyright (C) 2012 Lluís Vilanova <vilanova@ac.upc.edu>
+ * Copyright (C) 2012-2016 Lluís Vilanova <vilanova@ac.upc.edu>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
@@ -16,6 +16,7 @@
/**
* TraceEvent:
* @id: Unique event identifier.
+ * @cpu_id: Unique per-vCPU event identifier.
* @name: Event name.
* @sstate: Static tracing state.
* @dstate: Dynamic tracing state.
@@ -24,6 +25,7 @@
*/
typedef struct TraceEvent {
TraceEventID id;
+ TraceEventCPUID cpu_id;
const char * name;
const bool sstate;
bool dstate;
diff --git a/trace/qmp.c b/trace/qmp.c
index 0b19489..be99496 100644
--- a/trace/qmp.c
+++ b/trace/qmp.c
@@ -1,7 +1,7 @@
/*
* QMP commands for tracing events.
*
- * Copyright (C) 2014 Lluís Vilanova <vilanova@ac.upc.edu>
+ * Copyright (C) 2014-2016 Lluís Vilanova <vilanova@ac.upc.edu>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
@@ -22,6 +22,7 @@ TraceEventInfoList *qmp_trace_event_get_state(const char *name, Error **errp)
while ((ev = trace_event_pattern(name, ev)) != NULL) {
TraceEventInfoList *elem = g_new(TraceEventInfoList, 1);
elem->value = g_new(TraceEventInfo, 1);
+ elem->value->vcpu = trace_event_get_cpu_id(ev) != TRACE_CPU_EVENT_COUNT;
elem->value->name = g_strdup(trace_event_get_name(ev));
if (!trace_event_get_state_static(ev)) {
elem->value->state = TRACE_EVENT_STATE_UNAVAILABLE;
^ permalink raw reply related [flat|nested] 13+ messages in thread
* [Qemu-devel] [PATCH v4 4/9] exec: [tcg] Refactor flush of per-CPU virtual TB cache
2016-01-15 16:37 [Qemu-devel] [PATCH v4 0/9] trace: Per-vCPU tracing states Lluís Vilanova
` (2 preceding siblings ...)
2016-01-15 16:38 ` [Qemu-devel] [PATCH v4 3/9] trace: [tcg] Identify events with the 'vcpu' property Lluís Vilanova
@ 2016-01-15 16:38 ` Lluís Vilanova
2016-01-15 16:38 ` [Qemu-devel] [PATCH v4 5/9] exec: [tcg] Use multiple physical TB caches Lluís Vilanova
` (4 subsequent siblings)
8 siblings, 0 replies; 13+ messages in thread
From: Lluís Vilanova @ 2016-01-15 16:38 UTC (permalink / raw)
To: qemu-devel
Cc: Eduardo Habkost, Peter Crosthwaite, Stefan Hajnoczi,
Paolo Bonzini, Richard Henderson
The function is reused in later patches.
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
---
cputlb.c | 2 +-
include/exec/exec-all.h | 6 ++++++
translate-all.c | 7 ++++++-
3 files changed, 13 insertions(+), 2 deletions(-)
diff --git a/cputlb.c b/cputlb.c
index bf1d50a..74bf989 100644
--- a/cputlb.c
+++ b/cputlb.c
@@ -61,7 +61,7 @@ void tlb_flush(CPUState *cpu, int flush_global)
memset(env->tlb_table, -1, sizeof(env->tlb_table));
memset(env->tlb_v_table, -1, sizeof(env->tlb_v_table));
- memset(cpu->tb_jmp_cache, 0, sizeof(cpu->tb_jmp_cache));
+ tb_flush_jmp_cache_all(cpu);
env->vtlb_index = 0;
env->tlb_flush_addr = -1;
diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h
index d900b0d..0859873 100644
--- a/include/exec/exec-all.h
+++ b/include/exec/exec-all.h
@@ -238,6 +238,12 @@ struct TBContext {
};
void tb_free(TranslationBlock *tb);
+/**
+ * tb_flush_jmp_cache_all:
+ *
+ * Flush the virtual translation block cache.
+ */
+void tb_flush_jmp_cache_all(CPUState *env);
void tb_flush(CPUState *cpu);
void tb_phys_invalidate(TranslationBlock *tb, tb_page_addr_t page_addr);
diff --git a/translate-all.c b/translate-all.c
index 042a857..56899ee 100644
--- a/translate-all.c
+++ b/translate-all.c
@@ -846,7 +846,7 @@ void tb_flush(CPUState *cpu)
tcg_ctx.tb_ctx.nb_tbs = 0;
CPU_FOREACH(cpu) {
- memset(cpu->tb_jmp_cache, 0, sizeof(cpu->tb_jmp_cache));
+ tb_flush_jmp_cache_all(cpu);
}
memset(tcg_ctx.tb_ctx.tb_phys_hash, 0, sizeof(tcg_ctx.tb_ctx.tb_phys_hash));
@@ -1586,6 +1586,11 @@ void tb_check_watchpoint(CPUState *cpu)
}
}
+void tb_flush_jmp_cache_all(CPUState *cpu)
+{
+ memset(cpu->tb_jmp_cache, 0, sizeof(cpu->tb_jmp_cache));
+}
+
#ifndef CONFIG_USER_ONLY
/* in deterministic execution mode, instructions doing device I/Os
must be at the end of the TB */
^ permalink raw reply related [flat|nested] 13+ messages in thread
* [Qemu-devel] [PATCH v4 5/9] exec: [tcg] Use multiple physical TB caches
2016-01-15 16:37 [Qemu-devel] [PATCH v4 0/9] trace: Per-vCPU tracing states Lluís Vilanova
` (3 preceding siblings ...)
2016-01-15 16:38 ` [Qemu-devel] [PATCH v4 4/9] exec: [tcg] Refactor flush of per-CPU virtual TB cache Lluís Vilanova
@ 2016-01-15 16:38 ` Lluís Vilanova
2016-01-15 16:38 ` [Qemu-devel] [PATCH v4 6/9] exec: [tcg] Track which vCPU is performing translation and execution Lluís Vilanova
` (3 subsequent siblings)
8 siblings, 0 replies; 13+ messages in thread
From: Lluís Vilanova @ 2016-01-15 16:38 UTC (permalink / raw)
To: qemu-devel
Cc: Eduardo Habkost, Peter Crosthwaite, Stefan Hajnoczi,
Paolo Bonzini, Andreas Färber, Richard Henderson
The physical translation block cache is split into as many caches as wanted, and
the virtual TB cache on each guest CPU uses a (potentially) different physical
TB cache.
This is later exploited to support different tracing event states on a per-vCPU
basis.
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
---
cpu-exec.c | 17 +++++
include/exec/exec-all.h | 10 +++
include/qom/cpu.h | 5 ++
qom/cpu.c | 9 +++
translate-all.c | 146 +++++++++++++++++++++++++++++++++++++++++------
translate-all.h | 49 ++++++++++++++++
6 files changed, 214 insertions(+), 22 deletions(-)
diff --git a/cpu-exec.c b/cpu-exec.c
index c88d0ff..c258f16 100644
--- a/cpu-exec.c
+++ b/cpu-exec.c
@@ -27,6 +27,7 @@
#include "exec/address-spaces.h"
#include "qemu/rcu.h"
#include "exec/tb-hash.h"
+#include "translate-all.h"
#if defined(TARGET_I386) && !defined(CONFIG_USER_ONLY)
#include "hw/i386/apic.h"
#endif
@@ -224,7 +225,7 @@ static TranslationBlock *tb_find_physical(CPUState *cpu,
phys_pc = get_page_addr_code(env, pc);
phys_page1 = phys_pc & TARGET_PAGE_MASK;
h = tb_phys_hash_func(phys_pc);
- ptb1 = &tcg_ctx.tb_ctx.tb_phys_hash[h];
+ ptb1 = &tcg_ctx.tb_ctx.tb_phys_hash[cpu->tb_phys_idx][h];
for(;;) {
tb = *ptb1;
if (!tb) {
@@ -253,8 +254,8 @@ static TranslationBlock *tb_find_physical(CPUState *cpu,
/* Move the TB to the head of the list */
*ptb1 = tb->phys_hash_next;
- tb->phys_hash_next = tcg_ctx.tb_ctx.tb_phys_hash[h];
- tcg_ctx.tb_ctx.tb_phys_hash[h] = tb;
+ tb->phys_hash_next = tcg_ctx.tb_ctx.tb_phys_hash[cpu->tb_phys_idx][h];
+ tcg_ctx.tb_ctx.tb_phys_hash[cpu->tb_phys_idx][h] = tb;
return tb;
}
@@ -488,6 +489,16 @@ int cpu_exec(CPUState *cpu)
cpu->exception_index = EXCP_INTERRUPT;
cpu_loop_exit(cpu);
}
+ if (unlikely(tcg_ctx.tb_ctx.tb_phys_hash_size_req !=
+ tcg_ctx.tb_ctx.tb_phys_hash_size)) {
+ if (tb_caches_apply() < 0) {
+ next_tb = 0;
+ }
+ }
+ if (unlikely(cpu->tb_phys_idx != cpu->tb_phys_idx_req)) {
+ cpu_tb_cache_apply(cpu);
+ next_tb = 0;
+ }
tb_lock();
tb = tb_find_fast(cpu);
/* Note: we do it here to avoid a gcc bug on Mac OS X when
diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h
index 0859873..ba8b15c 100644
--- a/include/exec/exec-all.h
+++ b/include/exec/exec-all.h
@@ -177,6 +177,10 @@ static inline void tlb_flush_by_mmuidx(CPUState *cpu, ...)
#define USE_DIRECT_JUMP
#endif
+/**
+ * TranslationBlock:
+ * @phys_idx: Index of physical TB cache where this TB has been allocated.
+ */
struct TranslationBlock {
target_ulong pc; /* simulated PC corresponding to this block (EIP + CS base) */
target_ulong cs_base; /* CS base for this block */
@@ -216,6 +220,8 @@ struct TranslationBlock {
jmp_first */
struct TranslationBlock *jmp_next[2];
struct TranslationBlock *jmp_first;
+
+ unsigned int phys_idx;
};
#include "qemu/thread.h"
@@ -225,7 +231,9 @@ typedef struct TBContext TBContext;
struct TBContext {
TranslationBlock *tbs;
- TranslationBlock *tb_phys_hash[CODE_GEN_PHYS_HASH_SIZE];
+ TranslationBlock ***tb_phys_hash;
+ size_t tb_phys_hash_size;
+ size_t tb_phys_hash_size_req;
int nb_tbs;
/* any access to the tbs or the page table must use this lock */
QemuMutex tb_lock;
diff --git a/include/qom/cpu.h b/include/qom/cpu.h
index 51a1323..40962e0 100644
--- a/include/qom/cpu.h
+++ b/include/qom/cpu.h
@@ -250,6 +250,8 @@ struct kvm_run;
* @kvm_fd: vCPU file descriptor for KVM.
* @work_mutex: Lock to prevent multiple access to queued_work_*.
* @queued_work_first: First asynchronous work pending.
+ * @tb_phys_idx: Index of current phsyical TB cache.
+ * @tb_phys_idx_req: Index of requested phsyical TB cache.
*
* State of one CPU core or thread.
*/
@@ -314,6 +316,9 @@ struct CPUState {
struct KVMState *kvm_state;
struct kvm_run *kvm_run;
+ unsigned int tb_phys_idx;
+ unsigned int tb_phys_idx_req;
+
/* TODO Move common fields from CPUArchState here. */
int cpu_index; /* used by alpha TCG */
uint32_t halted; /* used by alpha, cris, ppc TCG */
diff --git a/qom/cpu.c b/qom/cpu.c
index fb80d13..bb7a618 100644
--- a/qom/cpu.c
+++ b/qom/cpu.c
@@ -363,6 +363,14 @@ static void cpu_class_init(ObjectClass *klass, void *data)
dc->cannot_instantiate_with_device_add_yet = true;
}
+static void cpu_init(Object *obj)
+{
+ CPUState *cpu = CPU(obj);
+
+ cpu->tb_phys_idx = 0;
+ cpu->tb_phys_idx_req = 0;
+}
+
static const TypeInfo cpu_type_info = {
.name = TYPE_CPU,
.parent = TYPE_DEVICE,
@@ -372,6 +380,7 @@ static const TypeInfo cpu_type_info = {
.abstract = true,
.class_size = sizeof(CPUClass),
.class_init = cpu_class_init,
+ .instance_init = cpu_init,
};
static void cpu_register_types(void)
diff --git a/translate-all.c b/translate-all.c
index 56899ee..ecadb66 100644
--- a/translate-all.c
+++ b/translate-all.c
@@ -163,9 +163,22 @@ static void tb_link_page(TranslationBlock *tb, tb_page_addr_t phys_pc,
tb_page_addr_t phys_page2);
static TranslationBlock *tb_find_pc(uintptr_t tc_ptr);
+static void tb_phys_cache_alloc(unsigned int idx)
+{
+ size_t size = sizeof(tcg_ctx.tb_ctx.tb_phys_hash[0][0]) *
+ CODE_GEN_PHYS_HASH_SIZE;
+ tcg_ctx.tb_ctx.tb_phys_hash[idx] = malloc(size);
+ memset(tcg_ctx.tb_ctx.tb_phys_hash[idx], 0, size);
+}
+
void cpu_gen_init(void)
{
tcg_context_init(&tcg_ctx);
+
+ tcg_ctx.tb_ctx.tb_phys_hash_size = 0;
+ tcg_ctx.tb_ctx.tb_phys_hash_size_req = 1;
+ tcg_ctx.tb_ctx.tb_phys_hash = NULL;
+ tb_caches_apply();
}
/* Encode VAL as a signed leb128 sequence at P.
@@ -849,7 +862,12 @@ void tb_flush(CPUState *cpu)
tb_flush_jmp_cache_all(cpu);
}
- memset(tcg_ctx.tb_ctx.tb_phys_hash, 0, sizeof(tcg_ctx.tb_ctx.tb_phys_hash));
+ unsigned int cache;
+ for (cache = 0; cache < tb_caches_get(); cache++) {
+ memset(tcg_ctx.tb_ctx.tb_phys_hash[cache], 0,
+ (sizeof(tcg_ctx.tb_ctx.tb_phys_hash[0][0]) *
+ CODE_GEN_PHYS_HASH_SIZE));
+ }
page_flush_tb();
tcg_ctx.code_gen_ptr = tcg_ctx.code_gen_buffer;
@@ -863,16 +881,21 @@ void tb_flush(CPUState *cpu)
static void tb_invalidate_check(target_ulong address)
{
TranslationBlock *tb;
+ unsigned int cache;
int i;
address &= TARGET_PAGE_MASK;
- for (i = 0; i < CODE_GEN_PHYS_HASH_SIZE; i++) {
- for (tb = tb_ctx.tb_phys_hash[i]; tb != NULL; tb = tb->phys_hash_next) {
- if (!(address + TARGET_PAGE_SIZE <= tb->pc ||
- address >= tb->pc + tb->size)) {
- printf("ERROR invalidate: address=" TARGET_FMT_lx
- " PC=%08lx size=%04x\n",
- address, (long)tb->pc, tb->size);
+ for (cache = 0; cache < tb_caches_get(); cache++) {
+ for (i = 0; i < CODE_GEN_PHYS_HASH_SIZE; i++) {
+ for (tb = tb_phys_hash[cache][i];
+ tb != NULL;
+ tb = tb->phys_hash_next) {
+ if (!(address + TARGET_PAGE_SIZE <= tb->pc ||
+ address >= tb->pc + tb->size)) {
+ printf("ERROR invalidate: address=" TARGET_FMT_lx
+ " PC=%08lx size=%04x\n",
+ address, (long)tb->pc, tb->size);
+ }
}
}
}
@@ -882,16 +905,20 @@ static void tb_invalidate_check(target_ulong address)
static void tb_page_check(void)
{
TranslationBlock *tb;
+ unsigned int cache;
int i, flags1, flags2;
- for (i = 0; i < CODE_GEN_PHYS_HASH_SIZE; i++) {
- for (tb = tcg_ctx.tb_ctx.tb_phys_hash[i]; tb != NULL;
- tb = tb->phys_hash_next) {
- flags1 = page_get_flags(tb->pc);
- flags2 = page_get_flags(tb->pc + tb->size - 1);
- if ((flags1 & PAGE_WRITE) || (flags2 & PAGE_WRITE)) {
- printf("ERROR page flags: PC=%08lx size=%04x f1=%x f2=%x\n",
- (long)tb->pc, tb->size, flags1, flags2);
+ for (cache = 0; cache < tb_caches_get(); cache++) {
+ for (i = 0; i < CODE_GEN_PHYS_HASH_SIZE; i++) {
+ for (tb = tb_phys_hash[cache][i];
+ tb != NULL;
+ tb = tb->phys_hash_next) {
+ flags1 = page_get_flags(tb->pc);
+ flags2 = page_get_flags(tb->pc + tb->size - 1);
+ if ((flags1 & PAGE_WRITE) || (flags2 & PAGE_WRITE)) {
+ printf("ERROR page flags: PC=%08lx size=%04x f1=%x f2=%x\n",
+ (long)tb->pc, tb->size, flags1, flags2);
+ }
}
}
}
@@ -978,7 +1005,7 @@ void tb_phys_invalidate(TranslationBlock *tb, tb_page_addr_t page_addr)
/* remove the TB from the hash list */
phys_pc = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK);
h = tb_phys_hash_func(phys_pc);
- tb_hash_remove(&tcg_ctx.tb_ctx.tb_phys_hash[h], tb);
+ tb_hash_remove(&tcg_ctx.tb_ctx.tb_phys_hash[tb->phys_idx][h], tb);
/* remove the TB from the page list */
if (tb->page_addr[0] != page_addr) {
@@ -1053,6 +1080,86 @@ static void build_page_bitmap(PageDesc *p)
}
}
+size_t tb_caches_get(void)
+{
+ return tcg_ctx.tb_ctx.tb_phys_hash_size;
+}
+
+void tb_caches_set(size_t count)
+{
+ assert(count > 0);
+#ifndef NDEBUG
+ /* ensure no CPU is going to switch/stay in one of the removed caches */
+ CPUState *cpu;
+ CPU_FOREACH(cpu) {
+ assert(cpu->tb_phys_idx_req < count);
+ }
+#endif
+ tcg_ctx.tb_ctx.tb_phys_hash_size_req = count;
+}
+
+int tb_caches_apply(void)
+{
+ struct TBContext *tb_ctx = &tcg_ctx.tb_ctx;
+
+ if (likely(tb_ctx->tb_phys_hash_size_req == tb_ctx->tb_phys_hash_size)) {
+ return 0;
+ }
+
+ int res = tb_ctx->tb_phys_hash_size_req < tb_ctx->tb_phys_hash_size ?
+ -1 : 1;
+
+ if (res < 0) {
+ int i;
+ for (i = tb_ctx->tb_phys_hash_size_req;
+ i < tb_ctx->tb_phys_hash_size;
+ i++) {
+ free(tb_ctx->tb_phys_hash[i]);
+ }
+
+ CPUState *cpu;
+ CPU_FOREACH(cpu) {
+ if (cpu->tb_phys_idx >= tb_ctx->tb_phys_hash_size_req) {
+ fprintf(stderr,
+ "CPU %d is using a deleted TB cache\n", cpu->cpu_index);
+ exit(1);
+ }
+ }
+ }
+
+ size_t size = sizeof(tb_ctx->tb_phys_hash[0]) *
+ tb_ctx->tb_phys_hash_size_req;
+ tb_ctx->tb_phys_hash = realloc(tb_ctx->tb_phys_hash, size);
+ int i;
+ for (i = tb_ctx->tb_phys_hash_size;
+ i < tb_ctx->tb_phys_hash_size_req;
+ i++) {
+ tb_phys_cache_alloc(i);
+ }
+
+ tb_ctx->tb_phys_hash_size = tb_ctx->tb_phys_hash_size_req;
+ return res;
+}
+
+unsigned int cpu_tb_cache_get(CPUState *cpu)
+{
+ return cpu->tb_phys_idx;
+}
+
+void cpu_tb_cache_set(CPUState *cpu, unsigned int index)
+{
+ assert(index < tcg_ctx.tb_ctx.tb_phys_hash_size_req);
+ cpu->tb_phys_idx_req = index;
+ cpu->tcg_exit_req = true;
+}
+
+void cpu_tb_cache_apply(CPUState *cpu)
+{
+ cpu->tb_phys_idx = cpu->tb_phys_idx_req;
+ tb_flush_jmp_cache_all(cpu);
+}
+
+
/* Called with mmap_lock held for user mode emulation. */
TranslationBlock *tb_gen_code(CPUState *cpu,
target_ulong pc, target_ulong cs_base,
@@ -1090,6 +1197,7 @@ TranslationBlock *tb_gen_code(CPUState *cpu,
tb->cs_base = cs_base;
tb->flags = flags;
tb->cflags = cflags;
+ tb->phys_idx = ENV_GET_CPU(env)->tb_phys_idx;
#ifdef CONFIG_PROFILER
tcg_ctx.tb_count1++; /* includes aborted translations because of
@@ -1480,7 +1588,7 @@ static void tb_link_page(TranslationBlock *tb, tb_page_addr_t phys_pc,
/* add in the physical hash table */
h = tb_phys_hash_func(phys_pc);
- ptb = &tcg_ctx.tb_ctx.tb_phys_hash[h];
+ ptb = &tcg_ctx.tb_ctx.tb_phys_hash[tb->phys_idx][h];
tb->phys_hash_next = *ptb;
*ptb = tb;
@@ -1643,6 +1751,8 @@ void cpu_io_recompile(CPUState *cpu, uintptr_t retaddr)
pc = tb->pc;
cs_base = tb->cs_base;
flags = tb->flags;
+ /* XXX: It is OK to invalidate only this TB, as this is the one triggering
+ * the memory access */
tb_phys_invalidate(tb, -1);
if (tb->cflags & CF_NOCACHE) {
if (tb->orig_tb) {
diff --git a/translate-all.h b/translate-all.h
index 0384640..d7ad063 100644
--- a/translate-all.h
+++ b/translate-all.h
@@ -19,6 +19,55 @@
#ifndef TRANSLATE_ALL_H
#define TRANSLATE_ALL_H
+
+/**
+ * tb_caches_get:
+ *
+ * Number of physical TB caches.
+ */
+size_t tb_caches_get(void);
+/**
+ * tb_caches_set:
+ *
+ * Request a new number of physical TB caches.
+ */
+void tb_caches_set(size_t count);
+/**
+ * tb_caches_apply:
+ *
+ * Apply the changes for a tb_caches_set() request.
+ *
+ * Returns: -1/1 if the number of caches has been shrinked/grown; 0 otherwise.
+ *
+ * Note: All TBs of eliminated caches are invalidated.
+ *
+ * Precondition: No vCPU uses any of the caches that will be removed (if any;
+ * see cpu_tb_cache_set() and tb_caches_set()).
+ */
+int tb_caches_apply(void);
+/**
+ * cpu_tb_cache_get:
+ *
+ * Get the physical TB cache index for the given CPU.
+ */
+unsigned int cpu_tb_cache_get(CPUState *cpu);
+/**
+ * cpu_tb_cache_set:
+ *
+ * Set the physical TB cache index for the given CPU.
+ *
+ * Will have effect at the beginning of the next executed TB.
+ */
+void cpu_tb_cache_set(CPUState *cpu, unsigned int index);
+/**
+ * cpu_tb_cache_apply:
+ *
+ * Apply the changes for a cpu_tb_cache_set() request.
+ *
+ * Note: Invalidates the jump cache of the given CPU.
+ */
+void cpu_tb_cache_apply(CPUState *env);
+
/* translate-all.c */
void tb_invalidate_phys_page_fast(tb_page_addr_t start, int len);
void tb_invalidate_phys_page_range(tb_page_addr_t start, tb_page_addr_t end,
^ permalink raw reply related [flat|nested] 13+ messages in thread
* [Qemu-devel] [PATCH v4 6/9] exec: [tcg] Track which vCPU is performing translation and execution
2016-01-15 16:37 [Qemu-devel] [PATCH v4 0/9] trace: Per-vCPU tracing states Lluís Vilanova
` (4 preceding siblings ...)
2016-01-15 16:38 ` [Qemu-devel] [PATCH v4 5/9] exec: [tcg] Use multiple physical TB caches Lluís Vilanova
@ 2016-01-15 16:38 ` Lluís Vilanova
2016-01-15 16:38 ` [Qemu-devel] [PATCH v4 7/9] disas: Remove unused macro '_' Lluís Vilanova
` (2 subsequent siblings)
8 siblings, 0 replies; 13+ messages in thread
From: Lluís Vilanova @ 2016-01-15 16:38 UTC (permalink / raw)
To: qemu-devel
Cc: Peter Maydell, Guan Xuetao, Eduardo Habkost, Peter Crosthwaite,
Stefan Hajnoczi, Anthony Green, Mark Cave-Ayland, Jia Liu,
Alexander Graf, Blue Swirl, Max Filippov, Michael Walle,
Leon Alrae, open list:PowerPC, open list:ARM, Paolo Bonzini,
Edgar E. Iglesias, Bastian Koppelmann, Aurelien Jarno,
Richard Henderson
Information is tracked inside the TCGContext structure, and later used
by tracing events with the 'tcg' and 'vcpu' properties.
The 'cpu' field is used to check tracing of translation-time
events ("*_trans"). The 'tcg_env' field is used to pass it to
execution-time events ("*_exec").
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
---
target-alpha/translate.c | 1 +
target-arm/translate.c | 1 +
target-cris/translate.c | 1 +
target-cris/translate_v10.c | 1 +
target-i386/translate.c | 1 +
target-lm32/translate.c | 1 +
target-m68k/translate.c | 1 +
target-microblaze/translate.c | 1 +
target-mips/translate.c | 1 +
target-moxie/translate.c | 1 +
target-openrisc/translate.c | 1 +
target-ppc/translate.c | 1 +
target-s390x/translate.c | 1 +
target-sh4/translate.c | 1 +
target-sparc/translate.c | 1 +
target-tilegx/translate.c | 1 +
target-tricore/translate.c | 1 +
target-unicore32/translate.c | 1 +
target-xtensa/translate.c | 1 +
tcg/tcg.h | 4 ++++
translate-all.c | 2 ++
21 files changed, 25 insertions(+)
diff --git a/target-alpha/translate.c b/target-alpha/translate.c
index d631f74..b5e2256 100644
--- a/target-alpha/translate.c
+++ b/target-alpha/translate.c
@@ -148,6 +148,7 @@ void alpha_translate_init(void)
done_init = 1;
cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+ tcg_ctx.tcg_env = cpu_env;
for (i = 0; i < 31; i++) {
cpu_std_ir[i] = tcg_global_mem_new_i64(TCG_AREG0,
diff --git a/target-arm/translate.c b/target-arm/translate.c
index b90b932..fa974b8 100644
--- a/target-arm/translate.c
+++ b/target-arm/translate.c
@@ -87,6 +87,7 @@ void arm_translate_init(void)
int i;
cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+ tcg_ctx.tcg_env = cpu_env;
for (i = 0; i < 16; i++) {
cpu_R[i] = tcg_global_mem_new_i32(TCG_AREG0,
diff --git a/target-cris/translate.c b/target-cris/translate.c
index 5ce5c58..8b34e38 100644
--- a/target-cris/translate.c
+++ b/target-cris/translate.c
@@ -3362,6 +3362,7 @@ void cris_initialize_tcg(void)
int i;
cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+ tcg_ctx.tcg_env = cpu_env;
cc_x = tcg_global_mem_new(TCG_AREG0,
offsetof(CPUCRISState, cc_x), "cc_x");
cc_src = tcg_global_mem_new(TCG_AREG0,
diff --git a/target-cris/translate_v10.c b/target-cris/translate_v10.c
index df20bdc..c0adf29 100644
--- a/target-cris/translate_v10.c
+++ b/target-cris/translate_v10.c
@@ -1249,6 +1249,7 @@ void cris_initialize_crisv10_tcg(void)
int i;
cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+ tcg_ctx.tcg_env = cpu_env;
cc_x = tcg_global_mem_new(TCG_AREG0,
offsetof(CPUCRISState, cc_x), "cc_x");
cc_src = tcg_global_mem_new(TCG_AREG0,
diff --git a/target-i386/translate.c b/target-i386/translate.c
index 53a09f8..fe5e155 100644
--- a/target-i386/translate.c
+++ b/target-i386/translate.c
@@ -7863,6 +7863,7 @@ void optimize_flags_init(void)
int i;
cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+ tcg_ctx.tcg_env = cpu_env;
cpu_cc_op = tcg_global_mem_new_i32(TCG_AREG0,
offsetof(CPUX86State, cc_op), "cc_op");
cpu_cc_dst = tcg_global_mem_new(TCG_AREG0, offsetof(CPUX86State, cc_dst),
diff --git a/target-lm32/translate.c b/target-lm32/translate.c
index a333fc6..7cb786f 100644
--- a/target-lm32/translate.c
+++ b/target-lm32/translate.c
@@ -1189,6 +1189,7 @@ void lm32_translate_init(void)
int i;
cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+ tcg_ctx.tcg_env = cpu_env;
for (i = 0; i < ARRAY_SIZE(cpu_R); i++) {
cpu_R[i] = tcg_global_mem_new(TCG_AREG0,
diff --git a/target-m68k/translate.c b/target-m68k/translate.c
index d68d615..6280da0 100644
--- a/target-m68k/translate.c
+++ b/target-m68k/translate.c
@@ -91,6 +91,7 @@ void m68k_tcg_init(void)
"EXCEPTION");
cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+ tcg_ctx.tcg_env = cpu_env;
p = cpu_reg_names;
for (i = 0; i < 8; i++) {
diff --git a/target-microblaze/translate.c b/target-microblaze/translate.c
index 3e3a49d..6a4be67 100644
--- a/target-microblaze/translate.c
+++ b/target-microblaze/translate.c
@@ -1867,6 +1867,7 @@ void mb_tcg_init(void)
int i;
cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+ tcg_ctx.tcg_env = cpu_env;
env_debug = tcg_global_mem_new(TCG_AREG0,
offsetof(CPUMBState, debug),
diff --git a/target-mips/translate.c b/target-mips/translate.c
index 610ed7c..c3cdc63 100644
--- a/target-mips/translate.c
+++ b/target-mips/translate.c
@@ -19818,6 +19818,7 @@ void mips_tcg_init(void)
return;
cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+ tcg_ctx.tcg_env = cpu_env;
TCGV_UNUSED(cpu_gpr[0]);
for (i = 1; i < 32; i++)
cpu_gpr[i] = tcg_global_mem_new(TCG_AREG0,
diff --git a/target-moxie/translate.c b/target-moxie/translate.c
index ab8f6a7..11277e0 100644
--- a/target-moxie/translate.c
+++ b/target-moxie/translate.c
@@ -109,6 +109,7 @@ void moxie_translate_init(void)
return;
}
cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+ tcg_ctx.tcg_env = cpu_env;
cpu_pc = tcg_global_mem_new_i32(TCG_AREG0,
offsetof(CPUMoxieState, pc), "$pc");
for (i = 0; i < 16; i++)
diff --git a/target-openrisc/translate.c b/target-openrisc/translate.c
index 3d29369..de2a541 100644
--- a/target-openrisc/translate.c
+++ b/target-openrisc/translate.c
@@ -77,6 +77,7 @@ void openrisc_translate_init(void)
int i;
cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+ tcg_ctx.tcg_env = cpu_env;
cpu_sr = tcg_global_mem_new(TCG_AREG0,
offsetof(CPUOpenRISCState, sr), "sr");
env_flags = tcg_global_mem_new_i32(TCG_AREG0,
diff --git a/target-ppc/translate.c b/target-ppc/translate.c
index 204cb3a..1dff9b2 100644
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -85,6 +85,7 @@ void ppc_translate_init(void)
return;
cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+ tcg_ctx.tcg_env = cpu_env;
p = cpu_reg_names;
cpu_reg_names_size = sizeof(cpu_reg_names);
diff --git a/target-s390x/translate.c b/target-s390x/translate.c
index 262da89..8df75db 100644
--- a/target-s390x/translate.c
+++ b/target-s390x/translate.c
@@ -166,6 +166,7 @@ void s390x_translate_init(void)
int i;
cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+ tcg_ctx.tcg_env = cpu_env;
psw_addr = tcg_global_mem_new_i64(TCG_AREG0,
offsetof(CPUS390XState, psw.addr),
"psw_addr");
diff --git a/target-sh4/translate.c b/target-sh4/translate.c
index c3a8fbd..58d1624 100644
--- a/target-sh4/translate.c
+++ b/target-sh4/translate.c
@@ -98,6 +98,7 @@ void sh4_translate_init(void)
return;
cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+ tcg_ctx.tcg_env = cpu_env;
for (i = 0; i < 24; i++)
cpu_gregs[i] = tcg_global_mem_new_i32(TCG_AREG0,
diff --git a/target-sparc/translate.c b/target-sparc/translate.c
index 44fdff8..981b628 100644
--- a/target-sparc/translate.c
+++ b/target-sparc/translate.c
@@ -5357,6 +5357,7 @@ void gen_intermediate_code_init(CPUSPARCState *env)
inited = 1;
cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+ tcg_ctx.tcg_env = cpu_env;
cpu_regwptr = tcg_global_mem_new_ptr(TCG_AREG0,
offsetof(CPUSPARCState, regwptr),
"regwptr");
diff --git a/target-tilegx/translate.c b/target-tilegx/translate.c
index fb5413a..9ae6d72 100644
--- a/target-tilegx/translate.c
+++ b/target-tilegx/translate.c
@@ -2440,6 +2440,7 @@ void tilegx_tcg_init(void)
int i;
cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+ tcg_ctx.tcg_env = cpu_env;
cpu_pc = tcg_global_mem_new_i64(TCG_AREG0, offsetof(CPUTLGState, pc), "pc");
for (i = 0; i < TILEGX_R_COUNT; i++) {
cpu_regs[i] = tcg_global_mem_new_i64(TCG_AREG0,
diff --git a/target-tricore/translate.c b/target-tricore/translate.c
index 655db75..a56bf2c 100644
--- a/target-tricore/translate.c
+++ b/target-tricore/translate.c
@@ -8366,6 +8366,7 @@ void tricore_tcg_init(void)
return;
}
cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+ tcg_ctx.tcg_env = cpu_env;
/* reg init */
for (i = 0 ; i < 16 ; i++) {
cpu_gpr_a[i] = tcg_global_mem_new(TCG_AREG0,
diff --git a/target-unicore32/translate.c b/target-unicore32/translate.c
index 29c22f5..1c66ab2 100644
--- a/target-unicore32/translate.c
+++ b/target-unicore32/translate.c
@@ -72,6 +72,7 @@ void uc32_translate_init(void)
int i;
cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+ tcg_ctx.tcg_env = cpu_env;
for (i = 0; i < 32; i++) {
cpu_R[i] = tcg_global_mem_new_i32(TCG_AREG0,
diff --git a/target-xtensa/translate.c b/target-xtensa/translate.c
index ce0f717..cbbed8d 100644
--- a/target-xtensa/translate.c
+++ b/target-xtensa/translate.c
@@ -217,6 +217,7 @@ void xtensa_translate_init(void)
int i;
cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+ tcg_ctx.tcg_env = cpu_env;
cpu_pc = tcg_global_mem_new_i32(TCG_AREG0,
offsetof(CPUXtensaState, pc), "pc");
diff --git a/tcg/tcg.h b/tcg/tcg.h
index 8bed171..5f465bf 100644
--- a/tcg/tcg.h
+++ b/tcg/tcg.h
@@ -575,6 +575,10 @@ struct TCGContext {
TBContext tb_ctx;
+ /* Track which vCPU triggers events */
+ CPUState *cpu; /* *_trans */
+ TCGv_cpu tcg_env; /* *_exec */
+
/* The TCGBackendData structure is private to tcg-target.c. */
struct TCGBackendData *be;
diff --git a/translate-all.c b/translate-all.c
index ecadb66..2395977 100644
--- a/translate-all.c
+++ b/translate-all.c
@@ -1205,6 +1205,8 @@ TranslationBlock *tb_gen_code(CPUState *cpu,
ti = profile_getclock();
#endif
+ tcg_ctx.cpu = ENV_GET_CPU(env);
+
tcg_func_start(&tcg_ctx);
gen_intermediate_code(env, tb);
^ permalink raw reply related [flat|nested] 13+ messages in thread
* [Qemu-devel] [PATCH v4 7/9] disas: Remove unused macro '_'
2016-01-15 16:37 [Qemu-devel] [PATCH v4 0/9] trace: Per-vCPU tracing states Lluís Vilanova
` (5 preceding siblings ...)
2016-01-15 16:38 ` [Qemu-devel] [PATCH v4 6/9] exec: [tcg] Track which vCPU is performing translation and execution Lluís Vilanova
@ 2016-01-15 16:38 ` Lluís Vilanova
2016-01-15 16:38 ` [Qemu-devel] [PATCH v4 8/9] trace: [tcg] Add per-vCPU tracing states for events with the 'vcpu' property Lluís Vilanova
2016-01-15 16:38 ` [Qemu-devel] [PATCH v4 9/9] trace: [tcg] Generate TCG code to trace guest events on a per-vCPU basis Lluís Vilanova
8 siblings, 0 replies; 13+ messages in thread
From: Lluís Vilanova @ 2016-01-15 16:38 UTC (permalink / raw)
To: qemu-devel
Cc: Stefan Hajnoczi, Richard Henderson, Eduardo Habkost, Paolo Bonzini
Eliminates a future compilation error when UI code includes the tracing
headers (indirectly pulling "disas/bfd.h" through "qom/cpu.h") and
GLib's i18n '_' macro.
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
---
disas/i386.c | 2 +-
include/disas/bfd.h | 1 -
2 files changed, 1 insertion(+), 2 deletions(-)
diff --git a/disas/i386.c b/disas/i386.c
index c63d4a0..a343fbc 100644
--- a/disas/i386.c
+++ b/disas/i386.c
@@ -3406,7 +3406,7 @@ static const struct dis386 three_byte_table[][256] = {
}
};
-#define INTERNAL_DISASSEMBLER_ERROR _("<internal disassembler error>")
+#define INTERNAL_DISASSEMBLER_ERROR "<internal disassembler error>"
static void
ckprefix (void)
diff --git a/include/disas/bfd.h b/include/disas/bfd.h
index a112e9c..a761d5b 100644
--- a/include/disas/bfd.h
+++ b/include/disas/bfd.h
@@ -477,7 +477,6 @@ int generic_symbol_at_address(bfd_vma, struct disassemble_info *);
(INFO).disassembler_options = NULL, \
(INFO).insn_info_valid = 0
-#define _(x) x
#define ATTRIBUTE_UNUSED __attribute__((unused))
/* from libbfd */
^ permalink raw reply related [flat|nested] 13+ messages in thread
* [Qemu-devel] [PATCH v4 8/9] trace: [tcg] Add per-vCPU tracing states for events with the 'vcpu' property
2016-01-15 16:37 [Qemu-devel] [PATCH v4 0/9] trace: Per-vCPU tracing states Lluís Vilanova
` (6 preceding siblings ...)
2016-01-15 16:38 ` [Qemu-devel] [PATCH v4 7/9] disas: Remove unused macro '_' Lluís Vilanova
@ 2016-01-15 16:38 ` Lluís Vilanova
2016-01-18 10:50 ` Paolo Bonzini
2016-01-19 22:06 ` Eric Blake
2016-01-15 16:38 ` [Qemu-devel] [PATCH v4 9/9] trace: [tcg] Generate TCG code to trace guest events on a per-vCPU basis Lluís Vilanova
8 siblings, 2 replies; 13+ messages in thread
From: Lluís Vilanova @ 2016-01-15 16:38 UTC (permalink / raw)
To: qemu-devel
Cc: Eduardo Habkost, Peter Crosthwaite, Stefan Hajnoczi, Riku Voipio,
Markus Armbruster, Luiz Capitulino, Blue Swirl, Stefan Hajnoczi,
Paolo Bonzini, Andreas Färber, Richard Henderson
Each event with the 'vcpu' property gets a per-vCPU dynamic tracing state.
The set of enabled events with the 'vcpu' and 'tcg' properties is used
to select a per-vCPU physical TB cache. The number of events with both
properties is used to select the number of physical TB caches, and a
bitmap of the identifiers of such enabled events is used to select a
physical TB cache.
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
---
Makefile.objs | 1
bsd-user/main.c | 2
include/qom/cpu.h | 10 ++
linux-user/main.c | 2
monitor.c | 4 -
qapi/trace.json | 11 ++
qmp-commands.hx | 17 +++-
scripts/tracetool/format/h.py | 1
scripts/tracetool/format/tcg_helper_c.py | 11 ++
trace/Makefile.objs | 2
trace/control-internal.h | 13 ++-
trace/control-stub.c | 29 ++++++
trace/control-target.c | 69 +++++++++++++++
trace/control.c | 17 +++-
trace/control.h | 55 ++++++++++++
trace/event-internal.h | 2
trace/qmp.c | 138 +++++++++++++++++++++++++-----
translate-all.c | 1
vl.c | 1
19 files changed, 344 insertions(+), 42 deletions(-)
create mode 100644 trace/control-stub.c
create mode 100644 trace/control-target.c
diff --git a/Makefile.objs b/Makefile.objs
index dac2c02..c268acb 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -103,6 +103,7 @@ version-lobj-$(CONFIG_WIN32) += $(BUILD_DIR)/version.lo
# tracing
util-obj-y += trace/
target-obj-y += trace/
+stub-obj-y += trace/
######################################################################
# guest agent
diff --git a/bsd-user/main.c b/bsd-user/main.c
index 1ecaeb5..b57f9a9 100644
--- a/bsd-user/main.c
+++ b/bsd-user/main.c
@@ -31,6 +31,7 @@
/* For tb_lock */
#include "cpu.h"
#include "tcg.h"
+#include "trace/control.h"
#include "qemu/timer.h"
#include "qemu/envlist.h"
@@ -1121,6 +1122,7 @@ int main(int argc, char **argv)
gdbserver_start (gdbstub_port);
gdb_handlesig(cpu, 0);
}
+ trace_init_vcpu_events();
cpu_loop(env);
/* never exits */
return 0;
diff --git a/include/qom/cpu.h b/include/qom/cpu.h
index 40962e0..d1cbd7a 100644
--- a/include/qom/cpu.h
+++ b/include/qom/cpu.h
@@ -29,6 +29,7 @@
#include "qemu/queue.h"
#include "qemu/thread.h"
#include "qemu/typedefs.h"
+#include "trace/generated-events.h"
typedef int (*WriteCoreDumpFunction)(const void *buf, size_t size,
void *opaque);
@@ -319,6 +320,15 @@ struct CPUState {
unsigned int tb_phys_idx;
unsigned int tb_phys_idx_req;
+ /*
+ * Ensure 'tb_phys_idx' can encode event states as a bitmask.
+ *
+ * This limits the number of events with the 'tcg' property and *without*
+ * the 'disabled' property to 'sizeof(tb_phys_idx)*8'.
+ */
+ bool too_many_tcg_vcpu_events[
+ TRACE_CPU_EVENT_COUNT > sizeof(unsigned int)*8 ? -1 : 0];
+
/* TODO Move common fields from CPUArchState here. */
int cpu_index; /* used by alpha TCG */
uint32_t halted; /* used by alpha, cris, ppc TCG */
diff --git a/linux-user/main.c b/linux-user/main.c
index ee12035..44f0536 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -30,6 +30,7 @@
#include "qemu-common.h"
#include "cpu.h"
#include "tcg.h"
+#include "trace/control.h"
#include "qemu/timer.h"
#include "qemu/envlist.h"
#include "elf.h"
@@ -4654,6 +4655,7 @@ int main(int argc, char **argv, char **envp)
}
gdb_handlesig(cpu, 0);
}
+ trace_init_vcpu_events();
cpu_loop(env);
/* never exits */
return 0;
diff --git a/monitor.c b/monitor.c
index c53a453..7c42e78 100644
--- a/monitor.c
+++ b/monitor.c
@@ -888,7 +888,7 @@ static void hmp_trace_event(Monitor *mon, const QDict *qdict)
bool new_state = qdict_get_bool(qdict, "option");
Error *local_err = NULL;
- qmp_trace_event_set_state(tp_name, new_state, true, true, &local_err);
+ qmp_trace_event_set_state(tp_name, new_state, true, true, false, 0, &local_err);
if (local_err) {
error_report_err(local_err);
}
@@ -1047,7 +1047,7 @@ static void hmp_info_cpustats(Monitor *mon, const QDict *qdict)
static void hmp_info_trace_events(Monitor *mon, const QDict *qdict)
{
- TraceEventInfoList *events = qmp_trace_event_get_state("*", NULL);
+ TraceEventInfoList *events = qmp_trace_event_get_state("*", false, 0, NULL);
TraceEventInfoList *elem;
for (elem = events; elem != NULL; elem = elem->next) {
diff --git a/qapi/trace.json b/qapi/trace.json
index 84c34dd..8708dba 100644
--- a/qapi/trace.json
+++ b/qapi/trace.json
@@ -42,13 +42,18 @@
# Query the state of events.
#
# @name: Event name pattern (case-sensitive glob).
+# @vcpu: #optional The vCPU to check (any by default; since 2.6).
#
# Returns: a list of @TraceEventInfo for the matching events
#
+# For any event without the "vcpu" property:
+# - If @name is a pattern and @vcpu is set, events are ignored.
+# - If @name is not a pattern and @vcpu is set, an error is raised.
+#
# Since 2.2
##
{ 'command': 'trace-event-get-state',
- 'data': {'name': 'str'},
+ 'data': {'name': 'str', '*vcpu': 'int'},
'returns': ['TraceEventInfo'] }
##
@@ -59,8 +64,10 @@
# @name: Event name pattern (case-sensitive glob).
# @enable: Whether to enable tracing.
# @ignore-unavailable: #optional Do not match unavailable events with @name.
+# @vcpu: #optional The vCPU to act upon (all by default; since 2.6).
#
# Since 2.2
##
{ 'command': 'trace-event-set-state',
- 'data': {'name': 'str', 'enable': 'bool', '*ignore-unavailable': 'bool'} }
+ 'data': {'name': 'str', 'enable': 'bool', '*ignore-unavailable': 'bool',
+ '*vcpu': 'int'} }
diff --git a/qmp-commands.hx b/qmp-commands.hx
index db072a6..ce6a419 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -4566,7 +4566,7 @@ EQMP
{
.name = "trace-event-get-state",
- .args_type = "name:s",
+ .args_type = "name:s,vcpu:i?",
.mhandler.cmd_new = qmp_marshal_trace_event_get_state,
},
@@ -4576,6 +4576,11 @@ trace-event-get-state
Query the state of events.
+Arguments:
+
+- "name": Event name pattern (json-string).
+- "vcpu": Specific vCPU to query, any vCPU by default (json-int, optional).
+
Example:
-> { "execute": "trace-event-get-state", "arguments": { "name": "qemu_memalign" } }
@@ -4584,7 +4589,7 @@ EQMP
{
.name = "trace-event-set-state",
- .args_type = "name:s,enable:b,ignore-unavailable:b?",
+ .args_type = "name:s,enable:b,ignore-unavailable:b?,vcpu:i?",
.mhandler.cmd_new = qmp_marshal_trace_event_set_state,
},
@@ -4594,6 +4599,13 @@ trace-event-set-state
Set the state of events.
+Arguments:
+
+- "name": Event name pattern (json-string).
+- "enable": Whether to enable or disable the event (json-bool).
+- "ignore-unavailable": Whether to ignore errors for events that cannot be changed (json-bool, optional).
+- "vcpu": Specific vCPU to set, all vCPUs by default (json-int, optional).
+
Example:
-> { "execute": "trace-event-set-state", "arguments": { "name": "qemu_memalign", "enable": "true" } }
@@ -4662,7 +4674,6 @@ Move mouse pointer to absolute coordinates (20000, 400).
{ "type": "abs", "data" : { "axis": "X", "value" : 20000 } },
{ "type": "abs", "data" : { "axis": "Y", "value" : 400 } } ] } }
<- { "return": {} }
-
EQMP
{
diff --git a/scripts/tracetool/format/h.py b/scripts/tracetool/format/h.py
index 2bd68a2..f98f26b 100644
--- a/scripts/tracetool/format/h.py
+++ b/scripts/tracetool/format/h.py
@@ -36,6 +36,7 @@ def generate(events, backend):
args=e.args)
if "disable" not in e.properties:
+ # NOTE: See note on 'trace_event_set_cpu_state()'.
backend.generate(e)
out('}')
diff --git a/scripts/tracetool/format/tcg_helper_c.py b/scripts/tracetool/format/tcg_helper_c.py
index 96655a0..e5dd3fe 100644
--- a/scripts/tracetool/format/tcg_helper_c.py
+++ b/scripts/tracetool/format/tcg_helper_c.py
@@ -6,7 +6,7 @@ Generate trace/generated-helpers.c.
"""
__author__ = "Lluís Vilanova <vilanova@ac.upc.edu>"
-__copyright__ = "Copyright 2012-2014, Lluís Vilanova <vilanova@ac.upc.edu>"
+__copyright__ = "Copyright 2012-2016, Lluís Vilanova <vilanova@ac.upc.edu>"
__license__ = "GPL version 2 or (at your option) any later version"
__maintainer__ = "Stefan Hajnoczi"
@@ -36,8 +36,13 @@ def generate(events, backend):
# tracetool.generate always transforms types to host
e_args = e.original.args
- values = ["(%s)%s" % (t, n)
- for t, n in e.args.transform(TCG_2_TCG_HELPER_DEF)]
+ values = []
+ for (t_old, n), (t_new, _) in zip(
+ e.args, e.args.transform(TCG_2_TCG_HELPER_DEF)):
+ if t_old == "CPUState *":
+ values.append("ENV_GET_CPU((CPUArchState*)%s)" % n)
+ else:
+ values.append("(%s)%s" % (t_new, n))
out('void %(name_tcg)s(%(args)s)',
'{',
diff --git a/trace/Makefile.objs b/trace/Makefile.objs
index 5145b34..a179d02 100644
--- a/trace/Makefile.objs
+++ b/trace/Makefile.objs
@@ -152,4 +152,6 @@ util-obj-$(CONFIG_TRACE_SIMPLE) += simple.o generated-tracers.o
util-obj-$(CONFIG_TRACE_FTRACE) += ftrace.o
util-obj-$(CONFIG_TRACE_UST) += generated-ust.o
util-obj-y += control.o
+target-obj-y += control-target.o
+stub-obj-y += control-stub.o
util-obj-y += qmp.o
diff --git a/trace/control-internal.h b/trace/control-internal.h
index ab42396..81e757f 100644
--- a/trace/control-internal.h
+++ b/trace/control-internal.h
@@ -12,6 +12,9 @@
#include <string.h>
+#include "qemu-common.h"
+#include "qom/cpu.h"
+
extern TraceEvent trace_events[];
@@ -60,14 +63,16 @@ static inline bool trace_event_get_state_static(TraceEvent *ev)
static inline bool trace_event_get_state_dynamic(TraceEvent *ev)
{
assert(ev != NULL);
- return ev->dstate;
+ /* no need to iterate over vCPUs, since the global dynamic state is always set */
+ return ev->dstate > 0;
}
-static inline void trace_event_set_state_dynamic(TraceEvent *ev, bool state)
+static inline bool trace_event_get_cpu_state_dynamic(CPUState *cpu,
+ TraceEvent *ev)
{
+ assert(cpu != NULL);
assert(ev != NULL);
- assert(trace_event_get_state_static(ev));
- ev->dstate = state;
+ return cpu->tb_phys_idx & (((unsigned long)1) << ev->cpu_id);
}
#endif /* TRACE__CONTROL_INTERNAL_H */
diff --git a/trace/control-stub.c b/trace/control-stub.c
new file mode 100644
index 0000000..784bc35
--- /dev/null
+++ b/trace/control-stub.c
@@ -0,0 +1,29 @@
+/*
+ * Interface for configuring and controlling the state of tracing events.
+ *
+ * Copyright (C) 2014-2016 Lluís Vilanova <vilanova@ac.upc.edu>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include "trace/control.h"
+
+
+void trace_init_vcpu_tb_caches(void)
+{
+}
+
+void trace_event_set_state_dynamic(TraceEvent *ev, bool state)
+{
+ assert(ev != NULL);
+ assert(trace_event_get_state_static(ev));
+ ev->dstate = state;
+}
+
+void trace_event_set_cpu_state_dynamic(CPUState *cpu,
+ TraceEvent *ev, bool state)
+{
+ /* should never be called on non-target binaries */
+ abort();
+}
diff --git a/trace/control-target.c b/trace/control-target.c
new file mode 100644
index 0000000..c256f54
--- /dev/null
+++ b/trace/control-target.c
@@ -0,0 +1,69 @@
+/*
+ * Interface for configuring and controlling the state of tracing events.
+ *
+ * Copyright (C) 2014-2016 Lluís Vilanova <vilanova@ac.upc.edu>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include "trace/control.h"
+#include "cpu.h"
+#include "translate-all.h"
+
+
+void trace_init_vcpu_tb_caches(void)
+{
+ unsigned int events = 1;
+ TraceEvent *ev = NULL;
+ while ((ev = trace_event_pattern("*", ev)) != NULL) {
+ if (trace_event_get_cpu_id(ev) == TRACE_CPU_EVENT_COUNT) {
+ continue;
+ }
+ events <<= 1;
+ }
+ tb_caches_set(events);
+ tb_caches_apply();
+}
+
+void trace_event_set_state_dynamic(TraceEvent *ev, bool state)
+{
+ CPUState *cpu;
+ assert(ev != NULL);
+ assert(trace_event_get_state_static(ev));
+ if (trace_event_get_cpu_id(ev) != TRACE_CPU_EVENT_COUNT) {
+ CPU_FOREACH(cpu) {
+ trace_event_set_cpu_state_dynamic(cpu, ev, state);
+ }
+ } else {
+ ev->dstate = state;
+ }
+}
+
+void trace_event_set_cpu_state_dynamic(CPUState *cpu,
+ TraceEvent *ev, bool state)
+{
+ /*
+ * NOTE: Does not immediately apply changes on all affected vCPUs, so
+ * "tcg-exec" events might be generated after being disabled (until
+ * the vCPU finishes a BBL and checks for event state changes).
+ */
+ unsigned int bit;
+ bool state_pre;
+ assert(cpu != NULL);
+ assert(ev != NULL);
+ assert(trace_event_get_state_static(ev));
+ assert(trace_event_get_cpu_id(ev) != TRACE_CPU_EVENT_COUNT);
+ bit = ((unsigned long)1) << ev->cpu_id;
+ /* must use the requested TB index in case it's not yet synchronized */
+ state_pre = cpu->tb_phys_idx_req & bit;
+ if ((state_pre == 0) != (state == 0)) {
+ if (state) {
+ cpu_tb_cache_set(cpu, (cpu->tb_phys_idx_req & ~bit) | bit);
+ ev->dstate++;
+ } else {
+ cpu_tb_cache_set(cpu, (cpu->tb_phys_idx_req & ~bit));
+ ev->dstate--;
+ }
+ }
+}
diff --git a/trace/control.c b/trace/control.c
index 995beb3..2bd5908 100644
--- a/trace/control.c
+++ b/trace/control.c
@@ -1,7 +1,7 @@
/*
* Interface for configuring and controlling the state of tracing events.
*
- * Copyright (C) 2011-2014 Lluís Vilanova <vilanova@ac.upc.edu>
+ * Copyright (C) 2011-2016 Lluís Vilanova <vilanova@ac.upc.edu>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
@@ -167,3 +167,18 @@ bool trace_init_backends(const char *events, const char *file)
trace_init_events(events);
return true;
}
+
+void trace_init_vcpu_events(void)
+{
+ TraceEvent *ev = NULL;
+ /*
+ * Set per-vCPU tracing state according to initial event state. The calls
+ * here affect al vCPUs in the system.
+ */
+ while ((ev = trace_event_pattern("*", ev)) != NULL) {
+ if (trace_event_get_cpu_id(ev) != TRACE_CPU_EVENT_COUNT &&
+ trace_event_get_state_dynamic(ev)) {
+ trace_event_set_state_dynamic(ev, true);
+ }
+ }
+}
diff --git a/trace/control.h b/trace/control.h
index 860beed..1103a4c 100644
--- a/trace/control.h
+++ b/trace/control.h
@@ -115,6 +115,22 @@ static const char * trace_event_get_name(TraceEvent *ev);
((id ##_ENABLED) && trace_event_get_state_dynamic(trace_event_id(id)))
/**
+ * trace_event_get_cpu_state:
+ * @id: Event identifier.
+ *
+ * Get the tracing state of an event (both static and dynamic) for the given
+ * vCPU.
+ *
+ * If the event has the disabled property, the check will have no performance
+ * impact.
+ *
+ * As a down side, you must always use an immediate #TraceEventID value.
+ */
+#define trace_event_get_cpu_state(cpu, id) \
+ ((id ##_ENABLED) && trace_event_get_cpu_state_dynamic(cpu, \
+ trace_event_id(id)))
+
+/**
* trace_event_get_state_static:
* @id: Event identifier.
*
@@ -129,10 +145,19 @@ static bool trace_event_get_state_static(TraceEvent *ev);
* trace_event_get_state_dynamic:
*
* Get the dynamic tracing state of an event.
+ *
+ * If the event has the 'vcpu' property, gets the OR'ed state of all vCPUs.
*/
static bool trace_event_get_state_dynamic(TraceEvent *ev);
/**
+ * trace_event_get_cpu_state_dynamic:
+ *
+ * Get the dynamic tracing state of an event for the given vCPU.
+ */
+static bool trace_event_get_cpu_state_dynamic(CPUState *cpu, TraceEvent *ev);
+
+/**
* trace_event_set_state:
*
* Set the tracing state of an event (only if possible).
@@ -146,13 +171,38 @@ static bool trace_event_get_state_dynamic(TraceEvent *ev);
} while (0)
/**
+ * trace_event_set_cpu_state:
+ *
+ * Set the tracing state of an event for the given vCPU (only if possible).
+ */
+#define trace_event_set_cpu_state(cpu, id, state) \
+ do { \
+ if ((id ##_ENABLED)) { \
+ TraceEvent *_e = trace_event_id(id); \
+ trace_event_set_cpu_state_dynamic(cpu, _e, state); \
+ } \
+ } while (0)
+
+/**
* trace_event_set_state_dynamic:
*
* Set the dynamic tracing state of an event.
*
+ * If the event has the 'vcpu' property, sets the state on all vCPUs.
+ *
* Pre-condition: trace_event_get_state_static(ev) == true
*/
-static void trace_event_set_state_dynamic(TraceEvent *ev, bool state);
+void trace_event_set_state_dynamic(TraceEvent *ev, bool state);
+
+/**
+ * trace_event_set_cpu_state_dynamic:
+ *
+ * Set the dynamic tracing state of an event for the given vCPU.
+ *
+ * Pre-condition: trace_event_get_cpu_state_static(ev) == true
+ */
+void trace_event_set_cpu_state_dynamic(CPUState *cpu,
+ TraceEvent *ev, bool state);
@@ -169,6 +219,9 @@ static void trace_event_set_state_dynamic(TraceEvent *ev, bool state);
*/
bool trace_init_backends(const char *events, const char *file);
+void trace_init_vcpu_tb_caches(void);
+void trace_init_vcpu_events(void);
+
#include "trace/control-internal.h"
diff --git a/trace/event-internal.h b/trace/event-internal.h
index 258bcde..b785017 100644
--- a/trace/event-internal.h
+++ b/trace/event-internal.h
@@ -28,7 +28,7 @@ typedef struct TraceEvent {
TraceEventCPUID cpu_id;
const char * name;
const bool sstate;
- bool dstate;
+ size_t dstate;
} TraceEvent;
diff --git a/trace/qmp.c b/trace/qmp.c
index be99496..8ee9b70 100644
--- a/trace/qmp.c
+++ b/trace/qmp.c
@@ -12,64 +12,152 @@
#include "trace/control.h"
-TraceEventInfoList *qmp_trace_event_get_state(const char *name, Error **errp)
+static bool get_cpu_state(bool has_index, int index, CPUState **cpu, Error **errp)
+{
+ if (has_index) {
+ *cpu = qemu_get_cpu(index);
+ if (*cpu == NULL) {
+ error_setg(errp, "invalid vCPU index %u", index);
+ return false;
+ }
+ } else {
+ *cpu = NULL;
+ }
+ return true;
+}
+
+TraceEventInfoList *qmp_trace_event_get_state(const char *name,
+ bool has_vcpu, int64_t vcpu,
+ Error **errp)
{
TraceEventInfoList *events = NULL;
- bool found = false;
TraceEvent *ev;
+ bool is_pattern = trace_event_is_pattern(name);
+ CPUState *cpu;
+
+ if (!get_cpu_state(has_vcpu, vcpu, &cpu, errp)) {
+ return NULL;
+ }
ev = NULL;
while ((ev = trace_event_pattern(name, ev)) != NULL) {
- TraceEventInfoList *elem = g_new(TraceEventInfoList, 1);
+ TraceEventInfoList *elem;
+ bool is_vcpu = trace_event_get_cpu_id(ev) != TRACE_CPU_EVENT_COUNT;
+ if (has_vcpu && !is_vcpu) {
+ if (!is_pattern) {
+ error_setg(errp, "event \"%s\" is not vCPU-specific", name);
+ }
+ /* else: ignore */
+ continue;
+ }
+
+ elem = g_new(TraceEventInfoList, 1);
elem->value = g_new(TraceEventInfo, 1);
- elem->value->vcpu = trace_event_get_cpu_id(ev) != TRACE_CPU_EVENT_COUNT;
+ elem->value->vcpu = is_vcpu;
elem->value->name = g_strdup(trace_event_get_name(ev));
+
if (!trace_event_get_state_static(ev)) {
elem->value->state = TRACE_EVENT_STATE_UNAVAILABLE;
- } else if (!trace_event_get_state_dynamic(ev)) {
- elem->value->state = TRACE_EVENT_STATE_DISABLED;
} else {
- elem->value->state = TRACE_EVENT_STATE_ENABLED;
+ if (has_vcpu) {
+ if (is_vcpu) {
+ if (trace_event_get_cpu_state_dynamic(cpu, ev)) {
+ elem->value->state = TRACE_EVENT_STATE_ENABLED;
+ } else {
+ elem->value->state = TRACE_EVENT_STATE_DISABLED;
+ }
+ }
+ /* else: already handled above */
+ } else {
+ if (trace_event_get_state_dynamic(ev)) {
+ elem->value->state = TRACE_EVENT_STATE_ENABLED;
+ } else {
+ elem->value->state = TRACE_EVENT_STATE_DISABLED;
+ }
+ }
}
elem->next = events;
events = elem;
- found = true;
}
- if (!found && !trace_event_is_pattern(name)) {
+ if (events == NULL && !is_pattern) {
error_setg(errp, "unknown event \"%s\"", name);
}
return events;
}
+
+static void check_events_are_dynamic(const char *name, bool per_cpu,
+ bool *found, bool error_check,
+ bool *error_found, Error **errp)
+{
+ TraceEvent *ev = NULL;
+ *found = false;
+ *error_found = false;
+ while ((ev = trace_event_pattern(name, ev)) != NULL) {
+ if (per_cpu && trace_event_get_cpu_id(ev) == TRACE_CPU_EVENT_COUNT) {
+ if (error_check) {
+ Error *local_err = NULL;
+ error_setg(&local_err, "event \"%s\" is not vCPU-specific",
+ trace_event_get_name(ev));
+ error_propagate(errp, local_err);
+ *error_found = true;
+ }
+ continue;
+ }
+ if (!trace_event_get_state_static(ev)) {
+ if (error_check) {
+ Error *local_err = NULL;
+ error_setg(&local_err, "cannot set dynamic tracing state for \"%s\"",
+ trace_event_get_name(ev));
+ error_propagate(errp, local_err);
+ *error_found = true;
+ }
+ continue;
+ }
+ *found = true;
+ }
+}
+
void qmp_trace_event_set_state(const char *name, bool enable,
- bool has_ignore_unavailable,
- bool ignore_unavailable, Error **errp)
+ bool has_ignore_unavailable, bool ignore_unavailable,
+ bool has_vcpu, int64_t vcpu,
+ Error **errp)
{
- bool found = false;
- TraceEvent *ev;
+ bool error, found;
+ TraceEvent *ev = NULL;
+ CPUState *cpu;
+
+ if (!get_cpu_state(has_vcpu, vcpu, &cpu, errp)) {
+ return;
+ }
/* Check all selected events are dynamic */
- ev = NULL;
- while ((ev = trace_event_pattern(name, ev)) != NULL) {
- found = true;
- if (!(has_ignore_unavailable && ignore_unavailable) &&
- !trace_event_get_state_static(ev)) {
- error_setg(errp, "cannot set dynamic tracing state for \"%s\"",
- trace_event_get_name(ev));
- return;
- }
+ check_events_are_dynamic(name, has_vcpu, &found,
+ !(has_ignore_unavailable && ignore_unavailable),
+ &error, errp);
+ if (error) {
+ return;
}
- if (!found && !trace_event_is_pattern(name)) {
- error_setg(errp, "unknown event \"%s\"", name);
+ if (!found) {
+ if (!trace_event_is_pattern(name)) {
+ error_setg(errp, "unknown event \"%s\"", name);
+ }
return;
}
/* Apply changes */
ev = NULL;
while ((ev = trace_event_pattern(name, ev)) != NULL) {
- if (trace_event_get_state_static(ev)) {
+ if (!trace_event_get_state_static(ev) ||
+ (has_vcpu && trace_event_get_cpu_id(ev) == TRACE_CPU_EVENT_COUNT)) {
+ /* if it were an error, it was catched by the check above */
+ continue;
+ }
+ if (has_vcpu) {
+ trace_event_set_cpu_state_dynamic(cpu, ev, enable);
+ } else {
trace_event_set_state_dynamic(ev, enable);
}
}
diff --git a/translate-all.c b/translate-all.c
index 2395977..dab44ad 100644
--- a/translate-all.c
+++ b/translate-all.c
@@ -179,6 +179,7 @@ void cpu_gen_init(void)
tcg_ctx.tb_ctx.tb_phys_hash_size_req = 1;
tcg_ctx.tb_ctx.tb_phys_hash = NULL;
tb_caches_apply();
+ trace_init_vcpu_tb_caches();
}
/* Encode VAL as a signed leb128 sequence at P.
diff --git a/vl.c b/vl.c
index b7a083e..dcba749 100644
--- a/vl.c
+++ b/vl.c
@@ -4659,6 +4659,7 @@ int main(int argc, char **argv, char **envp)
}
}
+ trace_init_vcpu_events();
main_loop();
replay_disable_events();
^ permalink raw reply related [flat|nested] 13+ messages in thread
* [Qemu-devel] [PATCH v4 9/9] trace: [tcg] Generate TCG code to trace guest events on a per-vCPU basis
2016-01-15 16:37 [Qemu-devel] [PATCH v4 0/9] trace: Per-vCPU tracing states Lluís Vilanova
` (7 preceding siblings ...)
2016-01-15 16:38 ` [Qemu-devel] [PATCH v4 8/9] trace: [tcg] Add per-vCPU tracing states for events with the 'vcpu' property Lluís Vilanova
@ 2016-01-15 16:38 ` Lluís Vilanova
8 siblings, 0 replies; 13+ messages in thread
From: Lluís Vilanova @ 2016-01-15 16:38 UTC (permalink / raw)
To: qemu-devel; +Cc: Stefan Hajnoczi, Eduardo Habkost, Stefan Hajnoczi
Events with the 'tcg' and 'vcpu' properties will:
* Trace the translation-time event ('*_trans').
* Generate TCG code to call a function that traces the execution-time
event ('*_exec') iff the event is enabled for that vCPU.
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
---
scripts/tracetool/format/tcg_h.py | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/scripts/tracetool/format/tcg_h.py b/scripts/tracetool/format/tcg_h.py
index acaa963..42f3b1c 100644
--- a/scripts/tracetool/format/tcg_h.py
+++ b/scripts/tracetool/format/tcg_h.py
@@ -32,7 +32,7 @@ def generate(events, backend):
for e in events:
# just keep one of them
- if "tcg-trans" not in e.properties:
+ if "tcg-exec" not in e.properties:
continue
# get the original event definition
@@ -52,7 +52,11 @@ def generate(events, backend):
if "disable" not in e.properties:
out(' %(name_trans)s(%(argnames_trans)s);',
- ' gen_helper_%(name_exec)s(%(argnames_exec)s);',
+ ' if (%(cond)s) {',
+ ' gen_helper_%(name_exec)s(%(argnames_exec)s);',
+ ' }',
+ cond='trace_event_get_cpu_state(_cpu, TRACE_%s)' % e.event_exec.name.upper()
+ if "vcpu" in e.properties else "true",
name_trans=e.event_trans.api(e.QEMU_TRACE),
name_exec=e.event_exec.api(e.QEMU_TRACE),
argnames_trans=", ".join(e.event_trans.args.names()),
^ permalink raw reply related [flat|nested] 13+ messages in thread
* Re: [Qemu-devel] [PATCH v4 8/9] trace: [tcg] Add per-vCPU tracing states for events with the 'vcpu' property
2016-01-15 16:38 ` [Qemu-devel] [PATCH v4 8/9] trace: [tcg] Add per-vCPU tracing states for events with the 'vcpu' property Lluís Vilanova
@ 2016-01-18 10:50 ` Paolo Bonzini
2016-01-18 11:55 ` Lluís Vilanova
2016-01-19 22:06 ` Eric Blake
1 sibling, 1 reply; 13+ messages in thread
From: Paolo Bonzini @ 2016-01-18 10:50 UTC (permalink / raw)
To: Lluís Vilanova, qemu-devel
Cc: Eduardo Habkost, Peter Crosthwaite, Stefan Hajnoczi, Riku Voipio,
Markus Armbruster, Luiz Capitulino, Blue Swirl, Stefan Hajnoczi,
Andreas Färber, Richard Henderson
On 15/01/2016 17:38, Lluís Vilanova wrote:
> Each event with the 'vcpu' property gets a per-vCPU dynamic tracing state.
>
> The set of enabled events with the 'vcpu' and 'tcg' properties is used
> to select a per-vCPU physical TB cache. The number of events with both
> properties is used to select the number of physical TB caches, and a
> bitmap of the identifiers of such enabled events is used to select a
> physical TB cache.
>
> Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
I may be wrong, but this patch and patches 3+5 seem overengineered. Why
can't you just flush the TB cache entirely whenever the set of trace
events changes, independent of whether they use the vcpu attribute?
That's a very rare event.
Paolo
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [Qemu-devel] [PATCH v4 8/9] trace: [tcg] Add per-vCPU tracing states for events with the 'vcpu' property
2016-01-18 10:50 ` Paolo Bonzini
@ 2016-01-18 11:55 ` Lluís Vilanova
0 siblings, 0 replies; 13+ messages in thread
From: Lluís Vilanova @ 2016-01-18 11:55 UTC (permalink / raw)
To: Paolo Bonzini
Cc: Eduardo Habkost, Peter Crosthwaite, Stefan Hajnoczi, Riku Voipio,
qemu-devel, Markus Armbruster, Blue Swirl, Stefan Hajnoczi,
Luiz Capitulino, Andreas Färber, Richard Henderson
Paolo Bonzini writes:
> On 15/01/2016 17:38, Lluís Vilanova wrote:
>> Each event with the 'vcpu' property gets a per-vCPU dynamic tracing state.
>>
>> The set of enabled events with the 'vcpu' and 'tcg' properties is used
>> to select a per-vCPU physical TB cache. The number of events with both
>> properties is used to select the number of physical TB caches, and a
>> bitmap of the identifiers of such enabled events is used to select a
>> physical TB cache.
>>
>> Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
> I may be wrong, but this patch and patches 3+5 seem overengineered. Why
> can't you just flush the TB cache entirely whenever the set of trace
> events changes, independent of whether they use the vcpu attribute?
> That's a very rare event.
A request for this was discussed some time ago, while the current simple version
was merged. Right now, an event is enabled for al vCPUs. This series allows
enabling events on a per-vCPU basis (e.g., trace memory accesses of a specific
vCPU, or with the necessary logic, trace a specific guest process).
This series contains three different new features that are closely related:
* Identify the guest vCPU that is generating an event (when it has the 'vcpu'
property).
* Set dynamic event state on a per-vCPU basis (when it has the 'tcg' and 'vcpu'
properties).
* Use a different virtual TB cache for each vCPU, so that they can efficiently
share TBs. If vCPUs have different events enabled, those with the disabled
events won't pay for the extra tracing code generated in the TB.
Would it be better to split these into three separate series? It would probably
make reviewing more manageable.
Also, I have more patches on my queue to start adding meaningful guest code
events (memory access and instruction traces), but they depend on this new
'vcpu' property.
Thanks,
Lluis
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [Qemu-devel] [PATCH v4 8/9] trace: [tcg] Add per-vCPU tracing states for events with the 'vcpu' property
2016-01-15 16:38 ` [Qemu-devel] [PATCH v4 8/9] trace: [tcg] Add per-vCPU tracing states for events with the 'vcpu' property Lluís Vilanova
2016-01-18 10:50 ` Paolo Bonzini
@ 2016-01-19 22:06 ` Eric Blake
1 sibling, 0 replies; 13+ messages in thread
From: Eric Blake @ 2016-01-19 22:06 UTC (permalink / raw)
To: Lluís Vilanova, qemu-devel
Cc: Eduardo Habkost, Peter Crosthwaite, Stefan Hajnoczi, Riku Voipio,
Markus Armbruster, Luiz Capitulino, Blue Swirl, Stefan Hajnoczi,
Paolo Bonzini, Andreas Färber, Richard Henderson
[-- Attachment #1: Type: text/plain, Size: 1030 bytes --]
On 01/15/2016 09:38 AM, Lluís Vilanova wrote:
> Each event with the 'vcpu' property gets a per-vCPU dynamic tracing state.
>
> The set of enabled events with the 'vcpu' and 'tcg' properties is used
> to select a per-vCPU physical TB cache. The number of events with both
> properties is used to select the number of physical TB caches, and a
> bitmap of the identifiers of such enabled events is used to select a
> physical TB cache.
>
> Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
> ---
> +++ b/qmp-commands.hx
> @@ -4594,6 +4599,13 @@ trace-event-set-state
>
> Set the state of events.
>
> +Arguments:
> +
> +- "name": Event name pattern (json-string).
> +- "enable": Whether to enable or disable the event (json-bool).
> +- "ignore-unavailable": Whether to ignore errors for events that cannot be changed (json-bool, optional).
Long line; wrap to keep it in 80 columns.
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 604 bytes --]
^ permalink raw reply [flat|nested] 13+ messages in thread
end of thread, other threads:[~2016-01-19 22:06 UTC | newest]
Thread overview: 13+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2016-01-15 16:37 [Qemu-devel] [PATCH v4 0/9] trace: Per-vCPU tracing states Lluís Vilanova
2016-01-15 16:37 ` [Qemu-devel] [PATCH v4 1/9] trace: Add support for vCPU pointers in trace events Lluís Vilanova
2016-01-15 16:38 ` [Qemu-devel] [PATCH v4 2/9] trace: Add 'vcpu' event property Lluís Vilanova
2016-01-15 16:38 ` [Qemu-devel] [PATCH v4 3/9] trace: [tcg] Identify events with the 'vcpu' property Lluís Vilanova
2016-01-15 16:38 ` [Qemu-devel] [PATCH v4 4/9] exec: [tcg] Refactor flush of per-CPU virtual TB cache Lluís Vilanova
2016-01-15 16:38 ` [Qemu-devel] [PATCH v4 5/9] exec: [tcg] Use multiple physical TB caches Lluís Vilanova
2016-01-15 16:38 ` [Qemu-devel] [PATCH v4 6/9] exec: [tcg] Track which vCPU is performing translation and execution Lluís Vilanova
2016-01-15 16:38 ` [Qemu-devel] [PATCH v4 7/9] disas: Remove unused macro '_' Lluís Vilanova
2016-01-15 16:38 ` [Qemu-devel] [PATCH v4 8/9] trace: [tcg] Add per-vCPU tracing states for events with the 'vcpu' property Lluís Vilanova
2016-01-18 10:50 ` Paolo Bonzini
2016-01-18 11:55 ` Lluís Vilanova
2016-01-19 22:06 ` Eric Blake
2016-01-15 16:38 ` [Qemu-devel] [PATCH v4 9/9] trace: [tcg] Generate TCG code to trace guest events on a per-vCPU basis Lluís Vilanova
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.