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.
Change-Id: I1e471e9e21f1a14ce2ed167d8515ccb5f83eb88c
Signed-off-by: Liam Mark <lmark@codeaurora.org>
Signed-off-by: Patrick Daly <pdaly@codeaurora.org>
diff --git a/mm/cma.c b/mm/cma.c
index c960459..6cf12fb 100644
--- a/mm/cma.c
+++ b/mm/cma.c
@@ -380,6 +380,8 @@ struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align)
if (!count)
return NULL;
+ trace_cma_alloc_start(count, align);
+
mask = cma_bitmap_aligned_mask(cma, align);
offset = cma_bitmap_aligned_offset(cma, align);
bitmap_maxno = cma_bitmap_maxno(cma);
@@ -420,6 +422,8 @@ 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;
}
diff --git a/mm/migrate.c b/mm/migrate.c
index 66ce6b4..f49de3cf 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -1319,6 +1319,8 @@ int migrate_pages(struct list_head *from, new_page_t get_new_page,
int swapwrite = current->flags & PF_SWAPWRITE;
int rc;
+ trace_mm_migrate_pages_start(mode, reason);
+
if (!swapwrite)
current->flags |= PF_SWAPWRITE;