From: "Alex Bennée" <alex.bennee@linaro.org>
To: qemu-devel@nongnu.org
Cc: "Vanderson M. do Rosario" <vandersonmr2@gmail.com>,
"Dr . David Alan Gilbert" <dgilbert@redhat.com>,
"Markus Armbruster" <armbru@redhat.com>,
cota@braap.org, "Paolo Bonzini" <pbonzini@redhat.com>,
"Alex Bennée" <alex.bennee@linaro.org>,
"Richard Henderson" <rth@twiddle.net>
Subject: [PATCH v9 07/13] monitor: adding tb_stats hmp command
Date: Mon, 7 Oct 2019 16:28:33 +0100 [thread overview]
Message-ID: <20191007152839.30804-8-alex.bennee@linaro.org> (raw)
In-Reply-To: <20191007152839.30804-1-alex.bennee@linaro.org>
From: "Vanderson M. do Rosario" <vandersonmr2@gmail.com>
Adding tb_stats [start|pause|stop|filter] command to hmp.
This allows controlling the collection of statistics.
It is also possible to set the level of collection:
all, jit, or exec.
tb_stats filter allow to only collect statistics for the TB
in the last_search list.
The goal of this command is to allow the dynamic exploration
of the TCG behavior and quality. Therefore, for now, a
corresponding QMP command is not worthwhile.
Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Vanderson M. do Rosario <vandersonmr2@gmail.com>
Message-Id: <20190829173437.5926-8-vandersonmr2@gmail.com>
[AJB: fix authorship]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
monitor: add tb_stats [start|pause|stop|filter] command to hmp.
This allows controlling the collection of statistics.
It is also possible to set the level of collection:
all, jit, or exec.
tb_stats filter allow to only collect statistics for the TB
in the last_search list.
The goal of this command is to allow the dynamic exploration
of the TCG behavior and quality. Therefore, for now, a
corresponding QMP command is not worthwhile.
Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Vanderson M. do Rosario <vandersonmr2@gmail.com>
Message-Id: <20190829173437.5926-9-vandersonmr2@gmail.com>
[AJB: fix authorship]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
accel/tcg/tb-stats.c | 105 ++++++++++++++++++++++++++++++++++
hmp-commands.hx | 17 ++++++
include/exec/tb-stats-flags.h | 1 +
include/exec/tb-stats.h | 10 ++++
monitor/misc.c | 49 ++++++++++++++++
vl.c | 6 ++
6 files changed, 188 insertions(+)
diff --git a/accel/tcg/tb-stats.c b/accel/tcg/tb-stats.c
index 1c66e03979..dabc5150f9 100644
--- a/accel/tcg/tb-stats.c
+++ b/accel/tcg/tb-stats.c
@@ -26,6 +26,8 @@ enum TBStatsStatus {
static enum TBStatsStatus tcg_collect_tb_stats;
static uint32_t default_tbstats_flag;
+/* only accessed in safe work */
+static GList *last_search;
uint64_t dev_time;
@@ -155,6 +157,96 @@ void dump_jit_profile_info(TCGProfile *s)
g_free(jpi);
}
+static void free_tbstats(void *p, uint32_t hash, void *userp)
+{
+ g_free(p);
+}
+
+static void clean_tbstats(void)
+{
+ /* remove all tb_stats */
+ qht_iter(&tb_ctx.tb_stats, free_tbstats, NULL);
+ qht_destroy(&tb_ctx.tb_stats);
+}
+
+void do_hmp_tbstats_safe(CPUState *cpu, run_on_cpu_data icmd)
+{
+ struct TbstatsCommand *cmdinfo = icmd.host_ptr;
+ int cmd = cmdinfo->cmd;
+ uint32_t level = cmdinfo->level;
+
+ switch (cmd) {
+ case START:
+ if (tb_stats_collection_paused()) {
+ set_tbstats_flags(level);
+ } else {
+ if (tb_stats_collection_enabled()) {
+ qemu_printf("TB information already being recorded");
+ return;
+ }
+ qht_init(&tb_ctx.tb_stats, tb_stats_cmp, CODE_GEN_HTABLE_SIZE,
+ QHT_MODE_AUTO_RESIZE);
+ }
+
+ set_default_tbstats_flag(level);
+ enable_collect_tb_stats();
+ tb_flush(cpu);
+ break;
+ case PAUSE:
+ if (!tb_stats_collection_enabled()) {
+ qemu_printf("TB information not being recorded");
+ return;
+ }
+
+ /* Continue to create TBStatistic structures but stop collecting statistics */
+ pause_collect_tb_stats();
+ set_default_tbstats_flag(TB_NOTHING);
+ set_tbstats_flags(TB_PAUSED);
+ tb_flush(cpu);
+ break;
+ case STOP:
+ if (!tb_stats_collection_enabled()) {
+ qemu_printf("TB information not being recorded");
+ return;
+ }
+
+ /* Dissalloc all TBStatistics structures and stop creating new ones */
+ disable_collect_tb_stats();
+ clean_tbstats();
+ tb_flush(cpu);
+ break;
+ case FILTER:
+ if (!tb_stats_collection_enabled()) {
+ qemu_printf("TB information not being recorded");
+ return;
+ }
+ if (!last_search) {
+ qemu_printf("no search on record! execute info tbs before filtering!");
+ return;
+ }
+
+ set_default_tbstats_flag(TB_NOTHING);
+
+ /* Set all tbstats as paused, then return only the ones from last_search */
+ pause_collect_tb_stats();
+ set_tbstats_flags(TB_PAUSED);
+
+ for (GList *iter = last_search; iter; iter = g_list_next(iter)) {
+ TBStatistics *tbs = iter->data;
+ tbs->stats_enabled = level;
+ }
+
+ tb_flush(cpu);
+
+ break;
+ default: /* INVALID */
+ g_assert_not_reached();
+ break;
+ }
+
+ g_free(cmdinfo);
+}
+
void init_tb_stats_htable_if_not(void)
{
if (tb_stats_collection_enabled() && !tb_ctx.tb_stats.map) {
@@ -189,6 +281,19 @@ bool tb_stats_collection_paused(void)
return tcg_collect_tb_stats == TB_STATS_PAUSED;
}
+static void reset_tbstats_flag(void *p, uint32_t hash, void *userp)
+{
+ uint32_t flag = *((int *)userp);
+ TBStatistics *tbs = p;
+ tbs->stats_enabled = flag;
+}
+
+void set_tbstats_flags(uint32_t flag)
+{
+ /* iterate over tbstats setting their flag as TB_NOTHING */
+ qht_iter(&tb_ctx.tb_stats, reset_tbstats_flag, &flag);
+}
+
uint32_t get_default_tbstats_flag(void)
{
return default_tbstats_flag;
diff --git a/hmp-commands.hx b/hmp-commands.hx
index cfcc044ce4..6cd2800378 100644
--- a/hmp-commands.hx
+++ b/hmp-commands.hx
@@ -1886,6 +1886,23 @@ STEXI
@findex qemu-io
Executes a qemu-io command on the given block device.
+ETEXI
+#if defined(CONFIG_TCG)
+ {
+ .name = "tb_stats",
+ .args_type = "command:s,level:s?",
+ .params = "command [stats_level]",
+ .help = "Control tb statistics collection:"
+ "tb_stats (start|pause|stop|filter) [all|jit_stats|exec_stats]",
+ .cmd = hmp_tbstats,
+ },
+#endif
+
+STEXI
+@item tb_stats
+@findex
+Control recording tb statistics
+
ETEXI
{
diff --git a/include/exec/tb-stats-flags.h b/include/exec/tb-stats-flags.h
index 8455073048..252304d685 100644
--- a/include/exec/tb-stats-flags.h
+++ b/include/exec/tb-stats-flags.h
@@ -15,6 +15,7 @@
#define TB_EXEC_STATS (1 << 1)
#define TB_JIT_STATS (1 << 2)
#define TB_JIT_TIME (1 << 3)
+#define TB_PAUSED (1 << 4)
/* TBStatistic collection controls */
void enable_collect_tb_stats(void);
diff --git a/include/exec/tb-stats.h b/include/exec/tb-stats.h
index 019d316f5c..921da38c97 100644
--- a/include/exec/tb-stats.h
+++ b/include/exec/tb-stats.h
@@ -32,6 +32,9 @@
#include "exec/tb-stats-flags.h"
+enum SortBy { SORT_BY_HOTNESS, SORT_BY_HG /* Host/Guest */, SORT_BY_SPILLS };
+enum TbstatsCmd { START, PAUSE, STOP, FILTER };
+
#define tb_stats_enabled(tb, JIT_STATS) \
(tb && tb->tb_stats && (tb->tb_stats->stats_enabled & JIT_STATS))
@@ -115,4 +118,11 @@ void init_tb_stats_htable_if_not(void);
void dump_jit_profile_info(TCGProfile *s);
+struct TbstatsCommand {
+ enum TbstatsCmd cmd;
+ uint32_t level;
+};
+
+void do_hmp_tbstats_safe(CPUState *cpu, run_on_cpu_data icmd);
+
#endif
diff --git a/monitor/misc.c b/monitor/misc.c
index ac4ff58d96..218263d29a 100644
--- a/monitor/misc.c
+++ b/monitor/misc.c
@@ -74,6 +74,8 @@
#include "sysemu/cpus.h"
#include "qemu/cutils.h"
#include "tcg/tcg.h"
+#include "exec/tb-stats.h"
+#include "qemu-common.h"
#if defined(TARGET_S390X)
#include "hw/s390x/storage-keys.h"
@@ -459,6 +461,49 @@ static void hmp_info_registers(Monitor *mon, const QDict *qdict)
}
#ifdef CONFIG_TCG
+static void hmp_tbstats(Monitor *mon, const QDict *qdict)
+{
+ if (!tcg_enabled()) {
+ error_report("TB information is only available with accel=tcg");
+ return;
+ }
+
+ char *cmd = (char *) qdict_get_try_str(qdict, "command");
+ enum TbstatsCmd icmd = -1;
+
+ if (strcmp(cmd, "start") == 0) {
+ icmd = START;
+ } else if (strcmp(cmd, "pause") == 0) {
+ icmd = PAUSE;
+ } else if (strcmp(cmd, "stop") == 0) {
+ icmd = STOP;
+ } else if (strcmp(cmd, "filter") == 0) {
+ icmd = FILTER;
+ } else {
+ error_report("invalid command!");
+ return;
+ }
+
+ char *slevel = (char *) qdict_get_try_str(qdict, "level");
+ uint32_t level = TB_EXEC_STATS | TB_JIT_STATS | TB_JIT_TIME;
+ if (slevel) {
+ if (strcmp(slevel, "jit") == 0) {
+ level = TB_JIT_STATS;
+ } else if (strcmp(slevel, "exec") == 0) {
+ level = TB_EXEC_STATS;
+ } else if (strcmp(slevel, "time") == 0) {
+ level = TB_JIT_TIME;
+ }
+ }
+
+ struct TbstatsCommand *tbscommand = g_new0(struct TbstatsCommand, 1);
+ tbscommand->cmd = icmd;
+ tbscommand->level = level;
+ async_safe_run_on_cpu(first_cpu, do_hmp_tbstats_safe,
+ RUN_ON_CPU_HOST_PTR(tbscommand));
+
+}
+
static void hmp_info_jit(Monitor *mon, const QDict *qdict)
{
if (!tcg_enabled()) {
@@ -1089,8 +1134,12 @@ static void hmp_info_mtree(Monitor *mon, const QDict *qdict)
static void hmp_info_profile(Monitor *mon, const QDict *qdict)
{
+#ifdef CONFIG_TCG
dump_jit_exec_time_info(dev_time);
dev_time = 0;
+#else
+ error_report("TCG should be enabled!");
+#endif
}
/* Capture support */
diff --git a/vl.c b/vl.c
index f91bc6fb4c..781fddaf18 100644
--- a/vl.c
+++ b/vl.c
@@ -1796,11 +1796,17 @@ static bool main_loop_should_exit(void)
static void main_loop(void)
{
+#ifdef CONFIG_TCG
uint64_t ti;
+#endif
while (!main_loop_should_exit()) {
+#ifdef CONFIG_TCG
ti = profile_getclock();
+#endif
main_loop_wait(false);
+#ifdef CONFIG_TCG
dev_time += profile_getclock() - ti;
+#endif
}
}
--
2.20.1
next prev parent reply other threads:[~2019-10-07 15:41 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-07 15:28 [PATCH v9 00/13] TCG code quality tracking and perf integration Alex Bennée
2019-10-07 15:28 ` [PATCH v9 01/13] accel/tcg: introduce TBStatistics structure Alex Bennée
2019-10-08 12:35 ` Richard Henderson
2019-12-13 11:14 ` Alex Bennée
2019-10-07 15:28 ` [PATCH v9 02/13] accel: collecting TB execution count Alex Bennée
2019-10-08 13:10 ` Richard Henderson
2019-10-07 15:28 ` [PATCH v9 03/13] accel: collecting JIT statistics Alex Bennée
2019-10-08 13:38 ` Richard Henderson
2019-12-13 11:51 ` Alex Bennée
2019-10-07 15:28 ` [PATCH v9 04/13] accel: replacing part of CONFIG_PROFILER with TBStats Alex Bennée
2019-10-08 13:58 ` Richard Henderson
2019-10-07 15:28 ` [PATCH v9 05/13] accel: adding TB_JIT_TIME and full replacing CONFIG_PROFILER Alex Bennée
2019-10-08 15:25 ` Richard Henderson
2019-12-13 21:49 ` Alex Bennée
2019-12-16 20:34 ` Richard Henderson
2019-10-07 15:28 ` [PATCH v9 06/13] debug: add -d tb_stats to control TBStatistics collection: Alex Bennée
2019-10-08 15:34 ` Richard Henderson
2019-10-08 15:49 ` Alex Bennée
2019-10-07 15:28 ` Alex Bennée [this message]
2019-10-08 15:48 ` [PATCH v9 07/13] monitor: adding tb_stats hmp command Richard Henderson
2019-10-07 15:28 ` [PATCH v9 08/13] tb-stats: reset the tracked TBs on a tb_flush Alex Bennée
2019-10-08 18:00 ` Richard Henderson
2019-10-08 19:18 ` Alex Bennée
2019-10-07 15:28 ` [PATCH v9 09/13] Adding info [tb-list|tb] commands to HMP (WIP) Alex Bennée
2019-10-08 18:50 ` Richard Henderson
2019-10-08 19:36 ` Alex Bennée
2019-10-09 9:44 ` Dr. David Alan Gilbert
2019-10-07 15:28 ` [PATCH v9 10/13] tb-stats: dump hot TBs at the end of the execution Alex Bennée
2019-10-08 19:05 ` Richard Henderson
2019-10-07 15:28 ` [PATCH v9 11/13] accel/tcg: adding integration with linux perf Alex Bennée
2019-10-08 19:33 ` Richard Henderson
2019-10-07 15:28 ` [PATCH v9 12/13] tb-stats: adding TBStatistics info into perf dump Alex Bennée
2019-10-08 19:46 ` Richard Henderson
2019-10-07 15:28 ` [PATCH v9 13/13] configure: remove the final bits of --profiler support Alex Bennée
2019-10-08 19:39 ` Richard Henderson
2019-10-07 18:14 ` [PATCH v9 00/13] TCG code quality tracking and perf integration no-reply
2019-10-07 18:47 ` no-reply
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