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page_pool: try direct bulk recycling

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Now that the checks for direct recycling possibility live inside the
Page Pool core, reuse them when performing bulk recycling.
page_pool_put_page_bulk() can be called from process context as well,
page_pool_napi_local() takes care of this at the very beginning.
Under high .ndo_xdp_xmit() traffic load, the win is 2-3% Pps assuming
the sending driver uses xdp_return_frame_bulk() on Tx completion.

Signed-off-by: Alexander Lobakin <aleksander.lobakin@intel.com>
Link: https://lore.kernel.org/r/20240329165507.3240110-3-aleksander.lobakin@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Alexander Lobakin
2024-03-29 17:55:07 +01:00
committed by Jakub Kicinski
parent 4a96a4e807
commit 39806b96c8
1 changed files with 5 additions and 2 deletions
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7
net/core/page_pool.c
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@@ -772,8 +772,11 @@ void page_pool_put_page_bulk(struct page_pool *pool, void **data,
int count)
{
int i, bulk_len = 0;
bool allow_direct;
bool in_softirq;
allow_direct = page_pool_napi_local(pool);
for (i = 0; i < count; i++) {
struct page *page = virt_to_head_page(data[i]);
@@ -781,13 +784,13 @@ void page_pool_put_page_bulk(struct page_pool *pool, void **data,
if (!page_pool_is_last_ref(page))
continue;
page = __page_pool_put_page(pool, page, -1, false);
page = __page_pool_put_page(pool, page, -1, allow_direct);
/* Approved for bulk recycling in ptr_ring cache */
if (page)
data[bulk_len++] = page;
}
if (unlikely(!bulk_len))
if (!bulk_len)
return;
/* Bulk producer into ptr_ring page_pool cache */