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author | Andrew Tridgell <tridge@samba.org> | 2013-09-12 16:21:24 +1000 |
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committer | Lorenz Meier <lm@inf.ethz.ch> | 2013-09-12 09:25:08 +0200 |
commit | 7257642371f52a96c8d891795d090119437ea933 (patch) | |
tree | 21398dcd072381c4840df581e0fbca97a8927fd7 | |
parent | 0b7294a26ec33f707a9b5ddeee4269552b147e8b (diff) | |
download | px4-firmware-7257642371f52a96c8d891795d090119437ea933.tar.gz px4-firmware-7257642371f52a96c8d891795d090119437ea933.tar.bz2 px4-firmware-7257642371f52a96c8d891795d090119437ea933.zip |
perf: added perf_event_count() method
this allows drivers to get an event_count from a perf counter
-rw-r--r-- | src/modules/systemlib/perf_counter.c | 26 | ||||
-rw-r--r-- | src/modules/systemlib/perf_counter.h | 8 |
2 files changed, 34 insertions, 0 deletions
diff --git a/src/modules/systemlib/perf_counter.c b/src/modules/systemlib/perf_counter.c index 3c1e10287..bf84b7945 100644 --- a/src/modules/systemlib/perf_counter.c +++ b/src/modules/systemlib/perf_counter.c @@ -321,6 +321,32 @@ perf_print_counter(perf_counter_t handle) } } +uint64_t +perf_event_count(perf_counter_t handle) +{ + if (handle == NULL) + return 0; + + switch (handle->type) { + case PC_COUNT: + return ((struct perf_ctr_count *)handle)->event_count; + + case PC_ELAPSED: { + struct perf_ctr_elapsed *pce = (struct perf_ctr_elapsed *)handle; + return pce->event_count; + } + + case PC_INTERVAL: { + struct perf_ctr_interval *pci = (struct perf_ctr_interval *)handle; + return pci->event_count; + } + + default: + break; + } + return 0; +} + void perf_print_all(void) { diff --git a/src/modules/systemlib/perf_counter.h b/src/modules/systemlib/perf_counter.h index 4cd8b67a1..e1e3cbe95 100644 --- a/src/modules/systemlib/perf_counter.h +++ b/src/modules/systemlib/perf_counter.h @@ -135,6 +135,14 @@ __EXPORT extern void perf_print_all(void); */ __EXPORT extern void perf_reset_all(void); +/** + * Return current event_count + * + * @param handle The counter returned from perf_alloc. + * @return event_count + */ +__EXPORT extern uint64_t perf_event_count(perf_counter_t handle); + __END_DECLS #endif |