The following commit has been merged into the perf/core branch of tip:
Commit-ID: df604bfda6f550f088e1cffcd098bfec0eee9cdf
Gitweb: https://git.kernel.org/tip/df604bfda6f550f088e1cffcd098bfec0eee9cdf
Author: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
AuthorDate: Tue, 15 Oct 2019 16:50:13 -03:00
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitterDate: Tue, 15 Oct 2019 16:50:13 -03:00
perf trace: Hook the 'vec' tracepoint argument with the x86 IRQ vectors scnprintf/strtoul
Ended up only being useful when filtering multiple irq_vectors
tracepoints, as we end up having a tracepoint for each of the entries,
i.e.:
This will always come with the "RESCHEDULE_VECTOR" in the 'vector' arg:
# perf trace --max-events 8 -e irq_vectors:reschedule*
0.000 cc1/29067 irq_vectors:reschedule_entry(vector: RESCHEDULE)
0.004 cc1/29067 irq_vectors:reschedule_exit(vector: RESCHEDULE)
0.553 cc1/29067 irq_vectors:reschedule_entry(vector: RESCHEDULE)
0.556 cc1/29067 irq_vectors:reschedule_exit(vector: RESCHEDULE)
1.182 cc1/29067 irq_vectors:reschedule_entry(vector: RESCHEDULE)
1.185 cc1/29067 irq_vectors:reschedule_exit(vector: RESCHEDULE)
1.203 :29052/29052 irq_vectors:reschedule_entry(vector: RESCHEDULE)
1.206 :29052/29052 irq_vectors:reschedule_exit(vector: RESCHEDULE)
#
While filtering that value will produce nothing:
# perf trace --max-events 8 -e irq_vectors:reschedule* --filter="vector != RESCHEDULE"
^C#
Maybe it'll be useful for those other tracepoints:
# perf list irq_vectors:vector_*
List of pre-defined events (to be used in -e):
irq_vectors:vector_activate [Tracepoint event]
irq_vectors:vector_alloc [Tracepoint event]
irq_vectors:vector_alloc_managed [Tracepoint event]
irq_vectors:vector_clear [Tracepoint event]
irq_vectors:vector_config [Tracepoint event]
irq_vectors:vector_deactivate [Tracepoint event]
irq_vectors:vector_free_moved [Tracepoint event]
irq_vectors:vector_reserve [Tracepoint event]
irq_vectors:vector_reserve_managed [Tracepoint event]
irq_vectors:vector_setup [Tracepoint event]
irq_vectors:vector_teardown [Tracepoint event]
irq_vectors:vector_update [Tracepoint event]
#
But since we have it done, keep it.
This at least served to teach me that all those irq vectors have a entry
and an exit tracepoint that I can then use just like with
raw_syscalls:sys_{enter,exit}, i.e. pair them, use just a
trace__irq_vectors_entry() + trace__irq_vectors_exit() and use the
'vector' arg as I use the 'syscall id' one for syscalls.
Then the default for 'perf trace' will include irq_vectors in addition
to syscalls.
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Luis Cláudio Gonçalves <lclaudio@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Link: https://lkml.kernel.org/n/tip-wer4cwbbqub3o7sa8h1j3uzb@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/builtin-trace.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 58bbe85..e71605c 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -1528,7 +1528,8 @@ static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args)
}
static struct syscall_arg_fmt syscall_arg_fmts__by_name[] = {
- { .name = "msr", .scnprintf = SCA_X86_MSR, .strtoul = STUL_X86_MSR, }
+ { .name = "msr", .scnprintf = SCA_X86_MSR, .strtoul = STUL_X86_MSR, },
+ { .name = "vector", .scnprintf = SCA_X86_IRQ_VECTORS, .strtoul = STUL_X86_IRQ_VECTORS, },
};
static int syscall_arg_fmt__cmp(const void *name, const void *fmtp)
|