From ef4a356574426877d569f8b6579325537eb7909b Mon Sep 17 00:00:00 2001 From: Masami Hiramatsu Date: Wed, 21 Apr 2010 15:56:40 -0400 Subject: 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 Suggested-by: Arnaldo Carvalho de Melo Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Mike Galbraith Cc: Frederic Weisbecker Cc: Ingo Molnar LKML-Reference: <20100421195640.24664.62984.stgit@localhost6.localdomain6> Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/probe-event.c | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-) (limited to 'tools/perf/util/probe-event.c') diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c index 5d3baec216e3..9ded38ced234 100644 --- a/tools/perf/util/probe-event.c +++ b/tools/perf/util/probe-event.c @@ -150,7 +150,8 @@ static int convert_to_perf_probe_point(struct kprobe_trace_point *tp, /* Try to find perf_probe_event with debuginfo */ static int try_to_find_kprobe_trace_events(struct perf_probe_event *pev, - struct kprobe_trace_event **tevs) + struct kprobe_trace_event **tevs, + int max_tevs) { bool need_dwarf = perf_probe_event_need_dwarf(pev); int fd, ntevs; @@ -166,7 +167,7 @@ static int try_to_find_kprobe_trace_events(struct perf_probe_event *pev, } /* Searching trace events corresponding to probe event */ - ntevs = find_kprobe_trace_events(fd, pev, tevs); + ntevs = find_kprobe_trace_events(fd, pev, tevs, max_tevs); close(fd); if (ntevs > 0) { /* Succeeded to find trace events */ @@ -318,7 +319,8 @@ static int convert_to_perf_probe_point(struct kprobe_trace_point *tp, } static int try_to_find_kprobe_trace_events(struct perf_probe_event *pev, - struct kprobe_trace_event **tevs __unused) + struct kprobe_trace_event **tevs __unused, + int max_tevs __unused) { if (perf_probe_event_need_dwarf(pev)) { pr_warning("Debuginfo-analysis is not supported.\n"); @@ -1408,14 +1410,15 @@ static int __add_kprobe_trace_events(struct perf_probe_event *pev, } static int convert_to_kprobe_trace_events(struct perf_probe_event *pev, - struct kprobe_trace_event **tevs) + struct kprobe_trace_event **tevs, + int max_tevs) { struct symbol *sym; int ret = 0, i; struct kprobe_trace_event *tev; /* Convert perf_probe_event with debuginfo */ - ret = try_to_find_kprobe_trace_events(pev, tevs); + ret = try_to_find_kprobe_trace_events(pev, tevs, max_tevs); if (ret != 0) return ret; @@ -1487,7 +1490,7 @@ struct __event_package { }; int add_perf_probe_events(struct perf_probe_event *pevs, int npevs, - bool force_add) + bool force_add, int max_tevs) { int i, j, ret; struct __event_package *pkgs; @@ -1506,7 +1509,7 @@ int add_perf_probe_events(struct perf_probe_event *pevs, int npevs, pkgs[i].pev = &pevs[i]; /* Convert with or without debuginfo */ ret = convert_to_kprobe_trace_events(pkgs[i].pev, - &pkgs[i].tevs); + &pkgs[i].tevs, max_tevs); if (ret < 0) goto end; pkgs[i].ntevs = ret; -- cgit v1.2.3-59-g8ed1b