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author | Ingo Molnar | 2015-09-16 09:12:07 +0200 |
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committer | Ingo Molnar | 2015-09-16 09:12:07 +0200 |
commit | a4d71093e759b7cfe0babbc6ae89c8130532f6ad (patch) | |
tree | 760399c41577b0e70ca4ecd32a807b19a625d432 /tools/perf/util/evsel.h | |
parent | Merge tag 'perf-core-for-mingo-2' of git://git.kernel.org/pub/scm/linux/kerne... (diff) | |
parent | perf tools: Introduce regs_query_register_offset() for x86 (diff) | |
download | kernel-qcow2-linux-a4d71093e759b7cfe0babbc6ae89c8130532f6ad.tar.gz kernel-qcow2-linux-a4d71093e759b7cfe0babbc6ae89c8130532f6ad.tar.xz kernel-qcow2-linux-a4d71093e759b7cfe0babbc6ae89c8130532f6ad.zip |
Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core
Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:
User visible changes:
- Enhance the error reporting of tracepoint event parsing, e.g.:
$ oldperf record -e sched:sched_switc usleep 1
event syntax error: 'sched:sched_switc'
\___ unknown tracepoint
Run 'perf list' for a list of valid events
Now we get the much nicer:
$ perf record -e sched:sched_switc ls
event syntax error: 'sched:sched_switc'
\___ can't access trace events
Error: No permissions to read /sys/kernel/debug/tracing/events/sched/sched_switc
Hint: Try 'sudo mount -o remount,mode=755 /sys/kernel/debug'
And after we have those mount point permissions fixed:
$ perf record -e sched:sched_switc ls
event syntax error: 'sched:sched_switc'
\___ unknown tracepoint
Error: File /sys/kernel/debug/tracing/events/sched/sched_switc not found.
Hint: Perhaps this kernel misses some CONFIG_ setting to enable this feature?.
Now its just a matter of using what git uses to suggest alternatives when we
make a typo, i.e. that it is just an 'h' missing :-)
I.e. basically now the event parsing routing uses the strerror_open()
routines introduced by and used in 'perf trace' work. (Jiri Olsa)
Infrastructure changes:
- Export init/exit_probe_symbol_maps() from 'perf probe' for use in eBPF.
(Namhyung Kim)
- Free perf_probe_event in cleanup_perf_probe_events(). (Namhyung Kim)
- regs_query_register_offset() infrastructure + implementation for x86.
First user will be the perf/eBPF code. (Wang Nan)
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools/perf/util/evsel.h')
-rw-r--r-- | tools/perf/util/evsel.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h index f164a149da82..62ab307b7306 100644 --- a/tools/perf/util/evsel.h +++ b/tools/perf/util/evsel.h @@ -160,6 +160,9 @@ static inline struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr) struct perf_evsel *perf_evsel__newtp_idx(const char *sys, const char *name, int idx); +/* + * Returns pointer with encoded error via <linux/err.h> interface. + */ static inline struct perf_evsel *perf_evsel__newtp(const char *sys, const char *name) { return perf_evsel__newtp_idx(sys, name, 0); |