summaryrefslogtreecommitdiff
path: root/tools/perf/util/pmu.c
diff options
context:
space:
mode:
authorHe Kuang <hekuang@huawei.com>2015-09-28 06:52:14 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2015-09-28 23:26:54 +0300
commitffeb883e5662e94b14948078e85812261277ad67 (patch)
tree3f99d5055deba60d63c90e68b99378339440d9b2 /tools/perf/util/pmu.c
parent0b8891a8e62cb537b65ebc55cfbbb4ec22333c44 (diff)
downloadlinux-ffeb883e5662e94b14948078e85812261277ad67.tar.xz
perf tools: Show proper error message for wrong terms of hw/sw events
Show proper error message and show valid terms when wrong config terms is specified for hw/sw type perf events. This patch makes the original error format function formats_error_string() more generic, which only outputs the static config terms for hw/sw perf events, and prepends pmu formats for pmu events. Before this patch: $ perf record -e 'cpu-clock/freqx=200/' -a sleep 1 invalid or unsupported event: 'cpu-clock/freqx=200/' Run 'perf list' for a list of valid events usage: perf record [<options>] [<command>] or: perf record [<options>] -- <command> [<options>] -e, --event <event> event selector. use 'perf list' to list available events After this patch: $ perf record -e 'cpu-clock/freqx=200/' -a sleep 1 event syntax error: 'cpu-clock/freqx=200/' \___ unknown term valid terms: config,config1,config2,name,period,freq,branch_type,time,call-graph,stack-size Run 'perf list' for a list of valid events usage: perf record [<options>] [<command>] or: perf record [<options>] -- <command> [<options>] -e, --event <event> event selector. use 'perf list' to list available events Signed-off-by: He Kuang <hekuang@huawei.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Kan Liang <kan.liang@intel.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Wang Nan <wangnan0@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1443412336-120050-2-git-send-email-hekuang@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/pmu.c')
-rw-r--r--tools/perf/util/pmu.c37
1 files changed, 14 insertions, 23 deletions
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 89c91a1a67e7..ac42c97be9e4 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -626,38 +626,26 @@ static int pmu_resolve_param_term(struct parse_events_term *term,
return -1;
}
-static char *formats_error_string(struct list_head *formats)
+static char *pmu_formats_string(struct list_head *formats)
{
struct perf_pmu_format *format;
- char *err, *str;
- static const char *static_terms = "config,config1,config2,name,"
- "period,freq,branch_type,time,"
- "call-graph,stack-size\n";
+ char *str;
+ struct strbuf buf;
unsigned i = 0;
- if (!asprintf(&str, "valid terms:"))
+ if (!formats)
return NULL;
+ strbuf_init(&buf, 0);
/* sysfs exported terms */
- list_for_each_entry(format, formats, list) {
- char c = i++ ? ',' : ' ';
-
- err = str;
- if (!asprintf(&str, "%s%c%s", err, c, format->name))
- goto fail;
- free(err);
- }
+ list_for_each_entry(format, formats, list)
+ strbuf_addf(&buf, i++ ? ",%s" : "%s",
+ format->name);
- /* static terms */
- err = str;
- if (!asprintf(&str, "%s,%s", err, static_terms))
- goto fail;
+ str = strbuf_detach(&buf, NULL);
+ strbuf_release(&buf);
- free(err);
return str;
-fail:
- free(err);
- return NULL;
}
/*
@@ -693,9 +681,12 @@ static int pmu_config_term(struct list_head *formats,
if (verbose)
printf("Invalid event/parameter '%s'\n", term->config);
if (err) {
+ char *pmu_term = pmu_formats_string(formats);
+
err->idx = term->err_term;
err->str = strdup("unknown term");
- err->help = formats_error_string(formats);
+ err->help = parse_events_formats_error_string(pmu_term);
+ free(pmu_term);
}
return -EINVAL;
}