[PATCH net-next] net: page_pool: add page allocation stats for two fast page allocate path

[PATCH net-next] net: page_pool: add page allocation stats for two fast page allocate path

[Guangbin Huang]

From: Jie Wang <wangjie125@huawei.com>

Currently If use page pool allocation stats to analysis a RX performance
degradation problem. These stats only count for pages allocate from
page_pool_alloc_pages. But nic drivers such as hns3 use
page_pool_dev_alloc_frag to allocate pages, so page stats in this API
should also be counted.

Signed-off-by: Jie Wang <wangjie125@huawei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
---
 net/core/page_pool.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/net/core/page_pool.c b/net/core/page_pool.c
index bdbadfaee867..f18e6e771993 100644
--- a/net/core/page_pool.c
+++ b/net/core/page_pool.c
@@ -704,8 +704,10 @@ struct page *page_pool_alloc_frag(struct page_pool *pool,
 
 	if (page && *offset + size > max_size) {
 		page = page_pool_drain_frag(pool, page);
-		if (page)
+		if (page) {
+			alloc_stat_inc(pool, fast);
 			goto frag_reset;
+		}
 	}
 
 	if (!page) {
@@ -727,6 +729,7 @@ struct page *page_pool_alloc_frag(struct page_pool *pool,
 
 	pool->frag_users++;
 	pool->frag_offset = *offset + size;
+	alloc_stat_inc(pool, fast);
 	return page;
 }
 EXPORT_SYMBOL(page_pool_alloc_frag);
-- 
2.33.0

Re: [PATCH net-next] net: page_pool: add page allocation stats for two fast page allocate path

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net-next.git (master)
by David S. Miller <davem@davemloft.net>:

On Thu, 12 May 2022 14:56:31 +0800 you wrote:
> From: Jie Wang <wangjie125@huawei.com>
> 
> Currently If use page pool allocation stats to analysis a RX performance
> degradation problem. These stats only count for pages allocate from
> page_pool_alloc_pages. But nic drivers such as hns3 use
> page_pool_dev_alloc_frag to allocate pages, so page stats in this API
> should also be counted.
> 
> [...]

Here is the summary with links:
  - [net-next] net: page_pool: add page allocation stats for two fast page allocate path
    https://git.kernel.org/netdev/net-next/c/0f6deac3a079

You are awesome, thank you!
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