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| author | Masami Hiramatsu | 2010-04-21 21:56:40 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo | 2010-04-26 20:35:20 +0200 |
| commit | ef4a356574426877d569f8b6579325537eb7909b (patch) | |
| tree | 0416c4ab1740a5ff6a07c01eee3e371128881110 /tools/perf/util/probe-finder.c | |
| parent | perf probe: Fix to exit callback soon after finding too many probe points (diff) | |
| download | kernel-qcow2-linux-ef4a356574426877d569f8b6579325537eb7909b.tar.gz kernel-qcow2-linux-ef4a356574426877d569f8b6579325537eb7909b.tar.xz kernel-qcow2-linux-ef4a356574426877d569f8b6579325537eb7909b.zip | |
perf probe: Add --max-probes option
Add --max-probes option to change the maximum limit of
findable probe points per event, since inlined function can be
expanded into thousands of probe points. Default value is 128.
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Suggested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
LKML-Reference: <20100421195640.24664.62984.stgit@localhost6.localdomain6>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/probe-finder.c')
| -rw-r--r-- | tools/perf/util/probe-finder.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c index 0d795bc3e1a8..562b1443e785 100644 --- a/tools/perf/util/probe-finder.c +++ b/tools/perf/util/probe-finder.c @@ -626,8 +626,9 @@ static int convert_probe_point(Dwarf_Die *sp_die, struct probe_finder *pf) Dwarf_Attribute fb_attr; size_t nops; - if (pf->ntevs == MAX_PROBES) { - pr_warning("Too many( > %d) probe point found.\n", MAX_PROBES); + if (pf->ntevs == pf->max_tevs) { + pr_warning("Too many( > %d) probe point found.\n", + pf->max_tevs); return -ERANGE; } tev = &pf->tevs[pf->ntevs++]; @@ -932,9 +933,9 @@ static int find_probe_point_by_func(struct probe_finder *pf) /* Find kprobe_trace_events specified by perf_probe_event from debuginfo */ int find_kprobe_trace_events(int fd, struct perf_probe_event *pev, - struct kprobe_trace_event **tevs) + struct kprobe_trace_event **tevs, int max_tevs) { - struct probe_finder pf = {.pev = pev}; + struct probe_finder pf = {.pev = pev, .max_tevs = max_tevs}; struct perf_probe_point *pp = &pev->point; Dwarf_Off off, noff; size_t cuhl; @@ -942,7 +943,7 @@ int find_kprobe_trace_events(int fd, struct perf_probe_event *pev, Dwarf *dbg; int ret = 0; - pf.tevs = zalloc(sizeof(struct kprobe_trace_event) * MAX_PROBES); + pf.tevs = zalloc(sizeof(struct kprobe_trace_event) * max_tevs); if (pf.tevs == NULL) return -ENOMEM; *tevs = pf.tevs; |