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| author | Ingo Molnar <mingo@kernel.org> | 2012-05-02 19:33:34 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-05-02 19:33:34 +0200 |
| commit | 4c8570362652ec427e8282d9c528bcc6cbe1075c (patch) | |
| tree | 6540196a1d3e0b626ca7c3be6708dfd11779814f /tools | |
| parent | 529acf58981440eefeaf1451387e2a0aa4825c12 (diff) | |
| parent | 5622c07b4741e0afd7607bce6e850b76eeb23210 (diff) | |
| download | lwn-4c8570362652ec427e8282d9c528bcc6cbe1075c.tar.gz lwn-4c8570362652ec427e8282d9c528bcc6cbe1075c.zip | |
Merge tag 'perf-urgent-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent
Fixes for perf/urgent:
- Add fallback in 'perf stat' for kernels that don't support
perf_event_attr.exclude_guest, from Stephane Eranian.
- Fix build id cache add routine to take the size of the buffer and not of a
pointer, from Namhyung Kim.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/builtin-stat.c | 33 | ||||
| -rw-r--r-- | tools/perf/util/header.c | 2 |
2 files changed, 30 insertions, 5 deletions
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index c941bb640f49..4532a789fbe3 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -283,6 +283,8 @@ static int create_perf_stat_counter(struct perf_evsel *evsel, { struct perf_event_attr *attr = &evsel->attr; struct xyarray *group_fd = NULL; + bool exclude_guest_missing = false; + int ret; if (group && evsel != first) group_fd = first->fd; @@ -293,16 +295,39 @@ static int create_perf_stat_counter(struct perf_evsel *evsel, attr->inherit = !no_inherit; - if (system_wide) - return perf_evsel__open_per_cpu(evsel, evsel_list->cpus, +retry: + if (exclude_guest_missing) + evsel->attr.exclude_guest = evsel->attr.exclude_host = 0; + + if (system_wide) { + ret = perf_evsel__open_per_cpu(evsel, evsel_list->cpus, group, group_fd); + if (ret) + goto check_ret; + return 0; + } + if (!target_pid && !target_tid && (!group || evsel == first)) { attr->disabled = 1; attr->enable_on_exec = 1; } - return perf_evsel__open_per_thread(evsel, evsel_list->threads, - group, group_fd); + ret = perf_evsel__open_per_thread(evsel, evsel_list->threads, + group, group_fd); + if (!ret) + return 0; + /* fall through */ +check_ret: + if (ret && errno == EINVAL) { + if (!exclude_guest_missing && + (evsel->attr.exclude_guest || evsel->attr.exclude_host)) { + pr_debug("Old kernel, cannot exclude " + "guest or host samples.\n"); + exclude_guest_missing = true; + goto retry; + } + } + return ret; } /* diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index 4c7c2d73251f..c0b70c697a36 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -296,7 +296,7 @@ int build_id_cache__add_s(const char *sbuild_id, const char *debugdir, if (mkdir_p(filename, 0755)) goto out_free; - snprintf(filename + len, sizeof(filename) - len, "/%s", sbuild_id); + snprintf(filename + len, size - len, "/%s", sbuild_id); if (access(filename, F_OK)) { if (is_kallsyms) { |