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perf_cnt: Add simple tic-toc api 

For simple performance measurement and optimization in development stage,
tic-toc api is provided. Performance data are traced at each tok call,
to allow fast clocks usage deviation estimation.

Signed-off-by: Karol Trzcinski <karolx.trzcinski@linux.intel.com>
This commit is contained in:
Karol Trzcinski 2020-06-24 12:06:16 +02:00 committed by Liam Girdwood
parent 96b303ea6a
commit 6a23e48e15
1 changed files with 33 additions and 0 deletions
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33
src/include/sof/lib/perf_cnt.h
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@ -82,6 +82,39 @@ struct perf_cnt_data {
} \
} while (0)
/**
* For simple performance measurement and optimization in development stage,
* tic-toc api is provided. Performance data are traced at each tok call,
* to allow fast clocks usage deviation estimation. Example:
*
* \code{.c}
* void foo(struct comp_dev *dev) {
* static struct perf_cnt_data pcd;
*
* perf_tic(&pcd);
* bar();
* perf_toc(&pcd, dev);
* }
* \endcode
*/
/** \brief Save start timestamp in pcd structure
*
* \param pcd Performance counters data.
*/
#define perf_tic(pcd) \
perf_cnt_init(pcd)
/** \brief Save start timestamp in pcd structure
*
* \param pcd Performance counters data.
* \param comp Component used to get corresponding trace context.
*/
#define perf_toc(pcd, comp) do { \
perf_cnt_stamp(pcd, perf_trace_null, NULL); \
perf_trace_simple(pcd, trace_comp_get_tr_ctx(comp)); \
} while (0)
#else
#define perf_cnt_clear(pcd)
#define perf_cnt_init(pcd)