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authorMike Galbraith <efault@gmx.de>2009-10-12 07:56:03 +0200
committerIngo Molnar <mingo@elte.hu>2009-10-12 09:10:55 +0200
commit7e4ff9e3e8f88de8a8536f43294cd32b4e7d9123 (patch)
tree4033b2ab865ce039f0287059c520be8703a08d42 /tools/perf/builtin-record.c
parentfe9081cc9bdabb0be953a39ad977cea14e35bce5 (diff)
downloadop-kernel-dev-7e4ff9e3e8f88de8a8536f43294cd32b4e7d9123.zip
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perf tools: Fix counter sample frequency breakage
Commit 42e59d7d19dc4b4 switched to a default sample frequency of 1KHz, which overrides any user supplied count, causing sched, top and timechart to miss events due to their discrete events being flagged PERF_SAMPLE_PERIOD. Override default sample frequency when the user profides a period count, and make both record and top honor that user supplied option. Signed-off-by: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arjan van de Ven <arjan@infradead.org> LKML-Reference: <1255326963.15107.2.camel@marge.simson.net> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf/builtin-record.c')
-rw-r--r--tools/perf/builtin-record.c14
1 files changed, 13 insertions, 1 deletions
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 59af03d..4e3a374 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -26,7 +26,7 @@
static int fd[MAX_NR_CPUS][MAX_COUNTERS];
-static long default_interval = 100000;
+static long default_interval = 0;
static int nr_cpus = 0;
static unsigned int page_size;
@@ -730,6 +730,18 @@ int cmd_record(int argc, const char **argv, const char *prefix __used)
attrs[0].config = PERF_COUNT_HW_CPU_CYCLES;
}
+ /*
+ * User specified count overrides default frequency.
+ */
+ if (default_interval)
+ freq = 0;
+ else if (freq) {
+ default_interval = freq;
+ } else {
+ fprintf(stderr, "frequency and count are zero, aborting\n");
+ exit(EXIT_FAILURE);
+ }
+
for (counter = 0; counter < nr_counters; counter++) {
if (attrs[counter].sample_period)
continue;
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