Commit-ID: 447a6013e91738c0d4118a7d0c56f235d8623695
Gitweb: http://git.kernel.org/tip/447a6013e91738c0d4118a7d0c56f235d8623695
Author: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
AuthorDate: Tue, 22 May 2012 13:14:18 -0300
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Tue, 22 May 2012 13:14:18 -0300
perf tools: Bump default sample freq to 4 kHz
Quoting Ingo:
"While at it I'd also suggest increasing the default sampling frequency,
from 1000 Hz per CPU to at least 4Khz auto-freq or so - this should work
well all across the board I think. CPUs are getting faster and command/app
run times are getting shorter, 1Khz is a bit low IMO."
Requested-by: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Mike Galbraith <efault@xxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Link: http://lkml.kernel.org/n/tip-2jafa6mkrufyekny9ei59lpu@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/builtin-record.c | 2 +-
tools/perf/builtin-top.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 9c76add..e5cb084 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -753,7 +753,7 @@ static struct perf_record record = {
.mmap_pages = UINT_MAX,
.user_freq = UINT_MAX,
.user_interval = ULLONG_MAX,
- .freq = 1000,
+ .freq = 4000,
.target = {
.uses_mmap = true,
},
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 18bd226..6031dce 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -1162,7 +1162,7 @@ int cmd_top(int argc, const char **argv, const char *prefix __used)
struct perf_top top = {
.count_filter = 5,
.delay_secs = 2,
- .freq = 1000, /* 1 KHz */
+ .freq = 4000, /* 4 KHz */
.mmap_pages = 128,
.sym_pcnt_filter = 5,
.target = {
--
To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
|