diff mbox series

[net-next,v4,09/11] page_pool: Add stat tracking cache refill

Message ID 1643933373-6590-10-git-send-email-jdamato@fastly.com (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series page_pool: Add page_pool stat counters | expand

Checks

Context Check Description
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 5979 this patch: 5979
netdev/cc_maintainers success CCed 5 of 5 maintainers
netdev/build_clang success Errors and warnings before: 879 this patch: 879
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 6130 this patch: 6130
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 18 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Joe Damato Feb. 4, 2022, 12:09 a.m. UTC 
Add a stat tracking succesfull allocations which triggered a refill.

Signed-off-by: Joe Damato <jdamato@fastly.com>
---
 include/net/page_pool.h | 1 +
 net/core/page_pool.c    | 4 +++-
 2 files changed, 4 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/include/net/page_pool.h b/include/net/page_pool.h
index b243480..65cd0ca 100644
--- a/include/net/page_pool.h
+++ b/include/net/page_pool.h
@@ -149,6 +149,7 @@  struct page_pool_stats {
 		u64 empty; /* failed refills due to empty ptr ring, forcing
 			    * slow path allocation
 			    */
+		u64 refill; /* allocations via successful refill */
 	} alloc;
 };
 #endif
diff --git a/net/core/page_pool.c b/net/core/page_pool.c
index b25ded1..4fe48ec 100644
--- a/net/core/page_pool.c
+++ b/net/core/page_pool.c
@@ -172,8 +172,10 @@  static struct page *page_pool_refill_alloc_cache(struct page_pool *pool)
 	} while (pool->alloc.count < PP_ALLOC_CACHE_REFILL);
 
 	/* Return last page */
-	if (likely(pool->alloc.count > 0))
+	if (likely(pool->alloc.count > 0)) {
 		page = pool->alloc.cache[--pool->alloc.count];
+		this_cpu_inc_alloc_stat(pool, refill);
+	}
 
 	return page;
 }