diff options
| author |   David Ahern <dsahern@gmail.com> | 2013-10-29 10:43:16 -0600 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2013-11-05 10:03:22 -0300 |
| commit | 87419c9afff1431d4b62b388baf6bfa07e0b14ff (patch) | |
| tree | 67790f43f93fb6fde554ef37357e9bee7b124a89 /tools/perf/builtin-kvm.c | |
| parent | perf hists: Consolidate __hists__add_*entry() (diff) | |
| download | linux-dev-87419c9afff1431d4b62b388baf6bfa07e0b14ff.tar.xz linux-dev-87419c9afff1431d4b62b388baf6bfa07e0b14ff.zip | |
perf kvm: Disable live command if timerfd is not supported
If the OS does not have timerfd support (e.g., older OS'es like RHEL5)
disable perf kvm stat live.
Signed-off-by: David Ahern <dsahern@gmail.com>
Reviewed-by: Jiri Olsa <jolsa@redhat.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1383064996-20933-2-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-kvm.c')
| -rw-r--r-- | tools/perf/builtin-kvm.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c index cb05f39d8a77..cd9f92078aba 100644 --- a/tools/perf/builtin-kvm.c +++ b/tools/perf/builtin-kvm.c @@ -20,7 +20,9 @@ #include "util/data.h" #include <sys/prctl.h> +#ifdef HAVE_TIMERFD_SUPPORT #include <sys/timerfd.h> +#endif #include <termios.h> #include <semaphore.h> @@ -337,6 +339,7 @@ static void init_kvm_event_record(struct perf_kvm_stat *kvm) INIT_LIST_HEAD(&kvm->kvm_events_cache[i]); } +#ifdef HAVE_TIMERFD_SUPPORT static void clear_events_cache_stats(struct list_head *kvm_events_cache) { struct list_head *head; @@ -358,6 +361,7 @@ static void clear_events_cache_stats(struct list_head *kvm_events_cache) } } } +#endif static int kvm_events_hash_fn(u64 key) { @@ -783,6 +787,7 @@ static void print_result(struct perf_kvm_stat *kvm) pr_info("\nLost events: %" PRIu64 "\n\n", kvm->lost_events); } +#ifdef HAVE_TIMERFD_SUPPORT static int process_lost_event(struct perf_tool *tool, union perf_event *event __maybe_unused, struct perf_sample *sample __maybe_unused, @@ -793,6 +798,7 @@ static int process_lost_event(struct perf_tool *tool, kvm->lost_events++; return 0; } +#endif static bool skip_sample(struct perf_kvm_stat *kvm, struct perf_sample *sample) @@ -872,6 +878,7 @@ static bool verify_vcpu(int vcpu) return true; } +#ifdef HAVE_TIMERFD_SUPPORT /* keeping the max events to a modest level to keep * the processing of samples per mmap smooth. */ @@ -1213,6 +1220,7 @@ static int kvm_live_open_events(struct perf_kvm_stat *kvm) out: return rc; } +#endif static int read_events(struct perf_kvm_stat *kvm) { @@ -1379,6 +1387,7 @@ kvm_events_report(struct perf_kvm_stat *kvm, int argc, const char **argv) return kvm_events_report_vcpu(kvm); } +#ifdef HAVE_TIMERFD_SUPPORT static struct perf_evlist *kvm_live_event_list(void) { struct perf_evlist *evlist; @@ -1566,6 +1575,7 @@ out: return err; } +#endif static void print_kvm_stat_usage(void) { @@ -1604,8 +1614,10 @@ static int kvm_cmd_stat(const char *file_name, int argc, const char **argv) if (!strncmp(argv[1], "rep", 3)) return kvm_events_report(&kvm, argc - 1 , argv + 1); +#ifdef HAVE_TIMERFD_SUPPORT if (!strncmp(argv[1], "live", 4)) return kvm_events_live(&kvm, argc - 1 , argv + 1); +#endif perf_stat: return cmd_stat(argc, argv, NULL); |