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| author | Arnaldo Carvalho de Melo | 2012-12-13 18:16:30 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo | 2013-01-24 20:40:08 +0100 |
| commit | c0a54341c0e89333ef201fc3f3001176962f6121 (patch) | |
| tree | d43d2fcb1c49ae17cbf8cf9aa270694b88cf39e1 /tools/perf/builtin-top.c | |
| parent | perf evsel: Do missing feature fallbacks in just one place (diff) | |
| download | kernel-qcow2-linux-c0a54341c0e89333ef201fc3f3001176962f6121.tar.gz kernel-qcow2-linux-c0a54341c0e89333ef201fc3f3001176962f6121.tar.xz kernel-qcow2-linux-c0a54341c0e89333ef201fc3f3001176962f6121.zip | |
perf evsel: Introduce event fallback method
The only fallback right now is for HW cpu-cycles -> SW cpu-clock, that
was done in the same way in both 'top' and 'record'.
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-58l1mgibh9oa9m0pd3fasxa5@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-top.c')
| -rw-r--r-- | tools/perf/builtin-top.c | 20 |
1 files changed, 3 insertions, 17 deletions
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index 74fca619fc4e..8d41d0b58956 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -892,6 +892,7 @@ static void perf_top__mmap_read(struct perf_top *top) static void perf_top__start_counters(struct perf_top *top) { + char msg[128]; struct perf_evsel *counter; struct perf_evlist *evlist = top->evlist; struct perf_record_opts *opts = &top->record_opts; @@ -909,25 +910,10 @@ try_again: ui__error_paranoid(); goto out_err; } - /* - * If it's cycles then fall back to hrtimer - * based cpu-clock-tick sw counter, which - * is always available even if no PMU support: - */ - if ((err == ENOENT || err == ENXIO) && - (attr->type == PERF_TYPE_HARDWARE) && - (attr->config == PERF_COUNT_HW_CPU_CYCLES)) { + if (perf_evsel__fallback(counter, err, msg, sizeof(msg))) { if (verbose) - ui__warning("Cycles event not supported,\n" - "trying to fall back to cpu-clock-ticks\n"); - - attr->type = PERF_TYPE_SOFTWARE; - attr->config = PERF_COUNT_SW_CPU_CLOCK; - if (counter->name) { - free(counter->name); - counter->name = NULL; - } + ui__warning("%s\n", msg); goto try_again; } |