diff options
| author | Andi Kleen <ak@linux.intel.com> | 2017-09-14 00:50:06 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2017-09-18 15:40:20 +0300 |
| commit | 333b566559019b146905c623bde7f455c1d5add3 (patch) | |
| tree | 5a55781d107265752784ba23a2257e18bd922bd1 /tools/perf/util/parse-events.c | |
| parent | 75e45e432052c7b1a5da866cff88192db8be1445 (diff) | |
| download | linux-333b566559019b146905c623bde7f455c1d5add3.tar.xz | |
perf pmu: Improve error messages for missing PMUs
When a PMU is missing print a better error message mentioning
the missing PMU.
% mkdir empty
% mount --bind empty /sys/devices/msr
% perf stat -M Summary true
event syntax error: '{inst_retired.any,cycles}:W,{cpu_clk_unhalted.thread}:W,{inst_retired.any}:W,{cpu_clk_unhalted.ref_tsc,msr/tsc/}:W,{fp_comp_ops_exe.sse_scalar..'
\___ Cannot find PMU `msr'. Missing kernel support?
It still cannot find the right column for aliases, but it's already a vast improvement.
v2: Check asprintf
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/20170913215006.32222-1-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/parse-events.c')
| -rw-r--r-- | tools/perf/util/parse-events.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index 75588920fccc..9183913a6174 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -1219,11 +1219,17 @@ static int __parse_events_add_pmu(struct parse_events_state *parse_state, struct perf_pmu_info info; struct perf_pmu *pmu; struct perf_evsel *evsel; + struct parse_events_error *err = parse_state->error; LIST_HEAD(config_terms); pmu = perf_pmu__find(name); - if (!pmu) + if (!pmu) { + if (asprintf(&err->str, + "Cannot find PMU `%s'. Missing kernel support?", + name) < 0) + err->str = NULL; return -EINVAL; + } if (pmu->default_config) { memcpy(&attr, pmu->default_config, @@ -1733,8 +1739,8 @@ static int get_term_width(void) return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col; } -static void parse_events_print_error(struct parse_events_error *err, - const char *event) +void parse_events_print_error(struct parse_events_error *err, + const char *event) { const char *str = "invalid or unsupported event: "; char _buf[MAX_WIDTH]; @@ -1789,8 +1795,6 @@ static void parse_events_print_error(struct parse_events_error *err, zfree(&err->str); zfree(&err->help); } - - fprintf(stderr, "Run 'perf list' for a list of valid events\n"); } #undef MAX_WIDTH @@ -1802,8 +1806,10 @@ int parse_events_option(const struct option *opt, const char *str, struct parse_events_error err = { .idx = 0, }; int ret = parse_events(evlist, str, &err); - if (ret) + if (ret) { parse_events_print_error(&err, str); + fprintf(stderr, "Run 'perf list' for a list of valid events\n"); + } return ret; } |