From: Valentin Schneider <vschneid@redhat.com>
To: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org,
linux-doc@vger.kernel.org, kvm@vger.kernel.org,
linux-mm@kvack.org, bpf@vger.kernel.org, x86@kernel.org,
rcu@vger.kernel.org, linux-kselftest@vger.kernel.org
Cc: "Steven Rostedt" <rostedt@goodmis.org>,
"Masami Hiramatsu" <mhiramat@kernel.org>,
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"Thomas Gleixner" <tglx@linutronix.de>,
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Zqiang <qiang.zhang1211@gmail.com>,
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Subject: [RFC PATCH v2 04/20] tracing/filters: Enable filtering the CPU common field by a cpumask
Date: Thu, 20 Jul 2023 17:30:40 +0100 [thread overview]
Message-ID: <20230720163056.2564824-5-vschneid@redhat.com> (raw)
In-Reply-To: <20230720163056.2564824-1-vschneid@redhat.com>
The tracing_cpumask lets us specify which CPUs are traced in a buffer
instance, but doesn't let us do this on a per-event basis (unless one
creates an instance per event).
A previous commit added filtering scalar fields by a user-given cpumask,
make this work with the CPU common field as well.
This enables doing things like
$ trace-cmd record -e 'sched_switch' -f 'CPU & CPUS{12-52}' \
-e 'sched_wakeup' -f 'target_cpu & CPUS{12-52}'
Signed-off-by: Valentin Schneider <vschneid@redhat.com>
---
kernel/trace/trace_events_filter.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
index 1e14f801685a8..3009d0c61b532 100644
--- a/kernel/trace/trace_events_filter.c
+++ b/kernel/trace/trace_events_filter.c
@@ -68,6 +68,7 @@ enum filter_pred_fn {
FILTER_PRED_FN_PCHAR_USER,
FILTER_PRED_FN_PCHAR,
FILTER_PRED_FN_CPU,
+ FILTER_PRED_FN_CPU_CPUMASK,
FILTER_PRED_FN_CPUMASK,
FILTER_PRED_FN_FUNCTION,
FILTER_PRED_FN_,
@@ -937,6 +938,14 @@ static int filter_pred_cpu(struct filter_pred *pred, void *event)
}
}
+/* Filter predicate for current CPU vs user-provided cpumask */
+static int filter_pred_cpu_cpumask(struct filter_pred *pred, void *event)
+{
+ int cpu = raw_smp_processor_id();
+
+ return do_filter_scalar_cpumask(pred->op, cpu, pred->mask);
+}
+
/* Filter predicate for cpumask field vs user-provided cpumask */
static int filter_pred_cpumask(struct filter_pred *pred, void *event)
{
@@ -1440,6 +1449,8 @@ static int filter_pred_fn_call(struct filter_pred *pred, void *event)
return filter_pred_pchar(pred, event);
case FILTER_PRED_FN_CPU:
return filter_pred_cpu(pred, event);
+ case FILTER_PRED_FN_CPU_CPUMASK:
+ return filter_pred_cpu_cpumask(pred, event);
case FILTER_PRED_FN_CPUMASK:
return filter_pred_cpumask(pred, event);
case FILTER_PRED_FN_FUNCTION:
@@ -1659,6 +1670,7 @@ static int parse_pred(const char *str, void *data,
switch (field->filter_type) {
case FILTER_CPUMASK:
+ case FILTER_CPU:
case FILTER_OTHER:
break;
default:
@@ -1714,6 +1726,8 @@ static int parse_pred(const char *str, void *data,
i++;
if (field->filter_type == FILTER_CPUMASK) {
pred->fn_num = FILTER_PRED_FN_CPUMASK;
+ } else if (field->filter_type == FILTER_CPU) {
+ pred->fn_num = FILTER_PRED_FN_CPU_CPUMASK;
} else {
switch (field->size) {
case 8:
--
2.31.1
next prev parent reply other threads:[~2023-07-20 16:32 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-20 16:30 [RFC PATCH v2 00/20] context_tracking,x86: Defer some IPIs until a user->kernel transition Valentin Schneider
2023-07-20 16:30 ` [RFC PATCH v2 01/20] tracing/filters: Dynamically allocate filter_pred.regex Valentin Schneider
2023-07-20 16:30 ` [RFC PATCH v2 02/20] tracing/filters: Enable filtering a cpumask field by another cpumask Valentin Schneider
2023-07-26 19:41 ` Josh Poimboeuf
2023-07-27 9:46 ` Valentin Schneider
2023-07-29 19:09 ` Steven Rostedt
2023-07-31 11:19 ` Valentin Schneider
2023-07-31 15:48 ` Steven Rostedt
2023-07-20 16:30 ` [RFC PATCH v2 03/20] tracing/filters: Enable filtering a scalar field by a cpumask Valentin Schneider
2023-07-20 16:30 ` Valentin Schneider [this message]
2023-07-20 16:30 ` [RFC PATCH v2 05/20] tracing/filters: Optimise cpumask vs cpumask filtering when user mask is a single CPU Valentin Schneider
2023-07-29 19:34 ` Steven Rostedt
2023-07-31 11:20 ` Valentin Schneider
2023-07-20 16:30 ` [RFC PATCH v2 06/20] tracing/filters: Optimise scalar vs cpumask filtering when the " Valentin Schneider
2023-07-29 19:55 ` Steven Rostedt
2023-07-31 11:20 ` Valentin Schneider
2023-07-31 12:07 ` Dan Carpenter
2023-07-31 15:54 ` Steven Rostedt
2023-07-31 16:03 ` Dan Carpenter
2023-07-31 17:20 ` Valentin Schneider
2023-07-31 18:16 ` Steven Rostedt
2023-07-20 16:30 ` [RFC PATCH v2 07/20] tracing/filters: Optimise CPU " Valentin Schneider
2023-07-20 16:30 ` [RFC PATCH v2 08/20] tracing/filters: Further optimise scalar vs cpumask comparison Valentin Schneider
2023-07-20 16:30 ` [RFC PATCH v2 09/20] tracing/filters: Document cpumask filtering Valentin Schneider
2023-07-20 16:30 ` [RFC PATCH v2 10/20] jump_label,module: Don't alloc static_key_mod for __ro_after_init keys Valentin Schneider
2023-07-28 22:04 ` Peter Zijlstra
2023-07-20 16:30 ` [RFC PATCH v2 11/20] objtool: Flesh out warning related to pv_ops[] calls Valentin Schneider
2023-07-28 15:33 ` Josh Poimboeuf
2023-07-31 11:16 ` Valentin Schneider
2023-07-31 21:36 ` Josh Poimboeuf
2023-07-31 21:46 ` Peter Zijlstra
2023-08-01 16:06 ` Josh Poimboeuf
2023-08-01 18:12 ` Peter Zijlstra
2023-07-20 16:30 ` [RFC PATCH v2 12/20] objtool: Warn about non __ro_after_init static key usage in .noinstr Valentin Schneider
2023-07-28 15:35 ` Josh Poimboeuf
2023-07-31 11:18 ` Valentin Schneider
2023-07-28 16:02 ` Josh Poimboeuf
2023-07-31 11:18 ` Valentin Schneider
2023-07-20 16:30 ` [RFC PATCH v2 13/20] context_tracking: Make context_tracking_key __ro_after_init Valentin Schneider
2023-07-28 16:00 ` Josh Poimboeuf
2023-07-31 11:16 ` Valentin Schneider
2023-07-20 16:30 ` [RFC PATCH v2 14/20] x86/kvm: Make kvm_async_pf_enabled __ro_after_init Valentin Schneider
2023-10-09 16:40 ` Maxim Levitsky
2023-07-20 16:30 ` [RFC PATCH v2 15/20] context-tracking: Introduce work deferral infrastructure Valentin Schneider
2023-07-24 14:52 ` Frederic Weisbecker
2023-07-24 16:55 ` Valentin Schneider
2023-07-24 19:18 ` Frederic Weisbecker
2023-07-25 10:10 ` Valentin Schneider
2023-07-25 11:22 ` Frederic Weisbecker
2023-07-25 13:05 ` Valentin Schneider
2023-07-20 16:30 ` [RFC PATCH v2 16/20] rcu: Make RCU dynticks counter size configurable Valentin Schneider
2023-07-21 8:17 ` Valentin Schneider
2023-07-21 14:10 ` Paul E. McKenney
2023-07-21 15:08 ` Valentin Schneider
2023-07-21 16:09 ` Paul E. McKenney
2023-07-20 16:30 ` [RFC PATCH v2 17/20] rcutorture: Add a test config to torture test low RCU_DYNTICKS width Valentin Schneider
2023-07-20 19:53 ` Paul E. McKenney
2023-07-21 4:00 ` Paul E. McKenney
2023-07-21 7:58 ` Valentin Schneider
2023-07-21 14:07 ` Paul E. McKenney
2023-07-21 15:08 ` Valentin Schneider
2023-07-20 16:30 ` [RFC PATCH v2 18/20] context_tracking,x86: Defer kernel text patching IPIs Valentin Schneider
2023-07-25 10:49 ` Joel Fernandes
2023-07-25 13:36 ` Valentin Schneider
2023-07-25 17:41 ` Joel Fernandes
2023-07-25 13:39 ` Peter Zijlstra
2023-07-25 17:47 ` Joel Fernandes
2023-07-20 16:30 ` [RFC PATCH v2 19/20] context_tracking,x86: Add infrastructure to defer kernel TLBI Valentin Schneider
2023-07-20 16:30 ` [RFC PATCH v2 20/20] x86/mm, mm/vmalloc: Defer flush_tlb_kernel_range() targeting NOHZ_FULL CPUs Valentin Schneider
2023-07-21 18:15 ` Nadav Amit
2023-07-24 11:32 ` Valentin Schneider
2023-07-24 17:40 ` Dave Hansen
2023-07-25 13:21 ` Peter Zijlstra
2023-07-25 14:03 ` Valentin Schneider
2023-07-25 16:37 ` Marcelo Tosatti
2023-07-25 17:12 ` Dave Hansen
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