From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9C612C433F5 for ; Wed, 26 Jan 2022 22:51:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231555AbiAZWvz (ORCPT ); Wed, 26 Jan 2022 17:51:55 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34784 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231597AbiAZWvy (ORCPT ); Wed, 26 Jan 2022 17:51:54 -0500 Received: from mail-pg1-x531.google.com (mail-pg1-x531.google.com [IPv6:2607:f8b0:4864:20::531]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5396FC06173B for ; Wed, 26 Jan 2022 14:51:54 -0800 (PST) Received: by mail-pg1-x531.google.com with SMTP id q75so641435pgq.5 for ; Wed, 26 Jan 2022 14:51:54 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fastly.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=nMhyZuz5FFHXx6SDIWuWD353Ivk0f2F3J9m8oxhLKhE=; b=gFacH/DvGsMLVHix1oTy7Hmcnj6Vq+NTq8Ao+Ul1QiTURmSY31geJXe5C3LxzkJigh AwyT/X9otwhOvh7eqghURSEDQmTYdbG8PTSfNMaAX7pVSYw9tFpo+J6AoBP4F51LelrF EyfwrU3i+5u9/TFHgcPz1cWdsyOuvcwmvP0is= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=nMhyZuz5FFHXx6SDIWuWD353Ivk0f2F3J9m8oxhLKhE=; b=1rux8G7iMmsXvsmMy+uU/IXLF7e4k74T4s+3jH92+lvzdj28Nc+x2CQ+XJgROUfV4T 1zBw/H2y6N4w7faqHvzH3BfOMyZWkfe2hmOecwN8MTJkdwx2fEL7PLVnxSK2++tS35/S W1T93DTmCEIKIL5cSd/2e2FwVe/Zn2mqdXrhNea68XZ6JAJfXHOl4zQsq9a3dzKWtEq4 g83+Q+QM9wqESKSZkCM9JG61gEEpUhevdTvVExbE4ruF3hBHu7J2/rtYULSgL0o8xbDH W34CEXtEbm59/iePEWluZ1aJsxtb8ewuqArWdKM63bJC+RxQORFklIBHm5GON/ifMLIN tDpQ== X-Gm-Message-State: AOAM5320PkzyDzyfYmvMdnIpAyMUNwnFBQiZq/Fozqk7WJMMNR3Gxj4b qJwM0sacMNZRFLZ7VP/Ujq/rYRDeCFVM7YFDB9GcPrZZB2KocdWWs7fFJ3nmeNM2ovWI7t4Xsgi T+eXWPK9ra7y5zfwSNGYpLUKLuFxBik7Mx20Qdm6+ZYjBB+bXMJ8eenTIYuJoxiZ2Pu/8 X-Google-Smtp-Source: ABdhPJze0ZxXHOjMTsRUtq4X/VQGhmFqHLmTsaROLnTdEqmfo7g8ivgM7DlJXGTYCUjMDpY/lHWuMw== X-Received: by 2002:a05:6a00:244b:: with SMTP id d11mr429376pfj.49.1643237513424; Wed, 26 Jan 2022 14:51:53 -0800 (PST) Received: from localhost.localdomain (c-73-223-190-181.hsd1.ca.comcast.net. [73.223.190.181]) by smtp.gmail.com with ESMTPSA id q15sm3793941pjj.19.2022.01.26.14.51.52 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Wed, 26 Jan 2022 14:51:52 -0800 (PST) From: Joe Damato To: netdev@vger.kernel.org Cc: kuba@kernel.org, davem@davemloft.net, ilias.apalodimas@linaro.org, hawk@kernel.org, Joe Damato Subject: [PATCH net-next 2/6] net: page_pool: Add a stat for the slow alloc path Date: Wed, 26 Jan 2022 14:48:16 -0800 Message-Id: <1643237300-44904-3-git-send-email-jdamato@fastly.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1643237300-44904-1-git-send-email-jdamato@fastly.com> References: <1643237300-44904-1-git-send-email-jdamato@fastly.com> Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Add a stat, 'slow', for the slow allocation path. A static inline accessor function is exposed for accessing this stat. Signed-off-by: Joe Damato --- include/net/page_pool.h | 10 ++++++++++ net/core/page_pool.c | 6 ++++-- 2 files changed, 14 insertions(+), 2 deletions(-) diff --git a/include/net/page_pool.h b/include/net/page_pool.h index 3ae3dc4..b5691ee 100644 --- a/include/net/page_pool.h +++ b/include/net/page_pool.h @@ -82,6 +82,7 @@ struct pp_alloc_cache { struct page_pool_stats { struct { u64 fast; /* fast path allocations */ + u64 slow; /* slow-path order-0 allocations */ } alloc; }; @@ -201,6 +202,10 @@ static inline u64 page_pool_stats_get_fast(struct page_pool *pool) return pool->ps.alloc.fast; } +static inline u64 page_pool_stats_get_slow(struct page_pool *pool) +{ + return pool->ps.alloc.slow; +} #else static inline void page_pool_destroy(struct page_pool *pool) { @@ -225,6 +230,11 @@ static inline u64 page_pool_stats_get_fast(struct page_pool *pool) { return 0; } + +static inline u64 page_pool_stats_get_slow(struct page_pool *pool) +{ + return 0; +} #endif void page_pool_put_page(struct page_pool *pool, struct page *page, diff --git a/net/core/page_pool.c b/net/core/page_pool.c index 84c9566..9dbe721 100644 --- a/net/core/page_pool.c +++ b/net/core/page_pool.c @@ -294,10 +294,12 @@ static struct page *__page_pool_alloc_pages_slow(struct page_pool *pool, } /* Return last page */ - if (likely(pool->alloc.count > 0)) + if (likely(pool->alloc.count > 0)) { page = pool->alloc.cache[--pool->alloc.count]; - else + pool->ps.alloc.slow++; + } else { page = NULL; + } /* When page just alloc'ed is should/must have refcnt 1. */ return page; -- 2.7.4