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| author | Liam Mark <lmark@codeaurora.org> | 2021-05-05 03:37:25 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-05-05 20:27:24 +0200 |
| commit | 7bc1aec5e28765ad18742824b3b972471807a632 (patch) | |
| tree | 670c177be7f22d8a39849161863f0d7fe8263f52 /mm/cma.c | |
| parent | mm: cma: use pr_err_ratelimited for CMA warning (diff) | |
| download | linux-7bc1aec5e28765ad18742824b3b972471807a632.tar.xz linux-7bc1aec5e28765ad18742824b3b972471807a632.zip | |
mm: cma: add trace events for CMA alloc perf testing
Add cma and migrate trace events to enable CMA allocation performance to
be measured via ftrace.
[georgi.djakov@linaro.org: add the CMA instance name to the cma_alloc_start trace event]
Link: https://lkml.kernel.org/r/20210326155414.25006-1-georgi.djakov@linaro.org
Link: https://lkml.kernel.org/r/20210324160740.15901-1-georgi.djakov@linaro.org
Signed-off-by: Liam Mark <lmark@codeaurora.org>
Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
Acked-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/cma.c')
| -rw-r--r-- | mm/cma.c | 4 |
1 files changed, 4 insertions, 0 deletions
@@ -443,6 +443,8 @@ struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align, if (!count) goto out; + trace_cma_alloc_start(cma->name, count, align); + mask = cma_bitmap_aligned_mask(cma, align); offset = cma_bitmap_aligned_offset(cma, align); bitmap_maxno = cma_bitmap_maxno(cma); @@ -483,6 +485,8 @@ struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align, pr_debug("%s(): memory range at %p is busy, retrying\n", __func__, pfn_to_page(pfn)); + + trace_cma_alloc_busy_retry(pfn, pfn_to_page(pfn), count, align); /* try again with a bit different memory target */ start = bitmap_no + mask + 1; } |