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 E6C05CCA481 for ; Fri, 8 Jul 2022 13:30:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237827AbiGHNah (ORCPT ); Fri, 8 Jul 2022 09:30:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36650 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238182AbiGHNae (ORCPT ); Fri, 8 Jul 2022 09:30:34 -0400 Received: from mail-pf1-x430.google.com (mail-pf1-x430.google.com [IPv6:2607:f8b0:4864:20::430]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 82F282CDD5 for ; Fri, 8 Jul 2022 06:30:32 -0700 (PDT) Received: by mail-pf1-x430.google.com with SMTP id d10so9760568pfd.9 for ; Fri, 08 Jul 2022 06:30:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=39SlS6NS1ui/steiqTOn7dlF7hk7Zbxqa+rOX/10Pw4=; b=CoaqZ63zFgb6H0DQbsbJ6CzLTFEZtS4eeqeDMyqFQm7lBfH9slPqXuEKokPKec8s9Z EdBAdY/EuNIkHfIG/E0uphNqXkLJn3aiFAbLMpbWTcTrRyupTOTIUud7X1V3v5DM2W4i cvvHtS9UKUmccn0Ej1JbQcQeQMYKftgysI6a7n25+0DCC6hOsrNsHjorEUpPjQRtguUV Q/hD+/Ry9sKkW/7lWE8GwrdWW08crja5embAGWH8747u5kLhZlDyeUtGxWGfaHZgpBha yn6fUbSkpw1O4W7TcgcbU6D0Fz6KpMyti8mtT3scD1yTP776vh7hRvojs3lRG4zPfOru zMbA== 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:mime-version:content-transfer-encoding; bh=39SlS6NS1ui/steiqTOn7dlF7hk7Zbxqa+rOX/10Pw4=; b=PZIYKBNnd5ny8oJfw/Nl6MaYRnpQonxQysWlXOx08O19OobpQVYjRlY5DAnZq2PwYz rlkihaHcdUuR2izhuLmRXF1aKK7VTExMlu0rymWkVLeNh+ENoEgCfBEHCjS0wxOb5l0d qf1Njj6PRtqj2E5w4vWN4JSJKJ3HfHlo4fYtQZyJt5+9+BR5CMXoR+gU8Fvp9A1USFOm pTh4/MZ0sqSo3micDlAEK/teizxU3jPueTdeqV8uYfFJQpj+n8HM23h4I+E6cOsxFHvb 8zH5YE4zv1lK2y8WYZ3kGh04a7e7H+6wOPrJRukpwcihQ4KtFONSAU98YqoG+z21zsia HTHA== X-Gm-Message-State: AJIora/+nuS7Ep5P30GiTfo1V+rZNDPmaMMG6N5dnxKRG3Aj9QSkLG+l BNXO8qrIh8Z5y7fX1UfXTOoie6BgR4UKBg== X-Google-Smtp-Source: AGRyM1sRwLGRZRb/mRnlt/fDgg67mXGCrtsBeksBgGhbK2jCutr/FRtpmvUkkCuZhreW8Q/GJ3CPqA== X-Received: by 2002:a63:8bc8:0:b0:413:9952:6059 with SMTP id j191-20020a638bc8000000b0041399526059mr3252786pge.61.1657287031790; Fri, 08 Jul 2022 06:30:31 -0700 (PDT) Received: from localhost.localdomain ([198.8.77.157]) by smtp.gmail.com with ESMTPSA id a16-20020aa794b0000000b0052844157f09sm3800502pfl.51.2022.07.08.06.30.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 08 Jul 2022 06:30:31 -0700 (PDT) From: Jens Axboe To: io-uring@vger.kernel.org Cc: asml.silence@gmail.com, dylany@fb.com, Jens Axboe Subject: [PATCH 4/4] io_uring: add netmsg cache Date: Fri, 8 Jul 2022 07:30:22 -0600 Message-Id: <20220708133022.383961-5-axboe@kernel.dk> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220708133022.383961-1-axboe@kernel.dk> References: <20220708133022.383961-1-axboe@kernel.dk> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org For recvmsg/sendmsg, if they don't complete inline, we currently need to allocate a struct io_async_msghdr for each request. This is a somewhat large struct. Hook up sendmsg/recvmsg to use the io_alloc_cache. This reduces the alloc + free overhead considerably, yielding 4-5% of extra performance running netbench. Signed-off-by: Jens Axboe --- include/linux/io_uring_types.h | 6 ++-- io_uring/io_uring.c | 3 ++ io_uring/net.c | 63 +++++++++++++++++++++++++++++----- io_uring/net.h | 13 ++++++- 4 files changed, 73 insertions(+), 12 deletions(-) diff --git a/include/linux/io_uring_types.h b/include/linux/io_uring_types.h index bf8f95332eda..d54b8b7e0746 100644 --- a/include/linux/io_uring_types.h +++ b/include/linux/io_uring_types.h @@ -222,8 +222,7 @@ struct io_ring_ctx { struct io_hash_table cancel_table_locked; struct list_head cq_overflow_list; struct io_alloc_cache apoll_cache; - struct xarray personalities; - u32 pers_next; + struct io_alloc_cache netmsg_cache; } ____cacheline_aligned_in_smp; /* IRQ completion list, under ->completion_lock */ @@ -241,6 +240,9 @@ struct io_ring_ctx { unsigned int file_alloc_start; unsigned int file_alloc_end; + struct xarray personalities; + u32 pers_next; + struct { /* * We cache a range of free CQEs we can use, once exhausted it diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c index c9c23e459766..f697ca4e8f55 100644 --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -89,6 +89,7 @@ #include "kbuf.h" #include "rsrc.h" #include "cancel.h" +#include "net.h" #include "timeout.h" #include "poll.h" @@ -297,6 +298,7 @@ static __cold struct io_ring_ctx *io_ring_ctx_alloc(struct io_uring_params *p) INIT_LIST_HEAD(&ctx->cq_overflow_list); INIT_LIST_HEAD(&ctx->io_buffers_cache); io_alloc_cache_init(&ctx->apoll_cache); + io_alloc_cache_init(&ctx->netmsg_cache); init_completion(&ctx->ref_comp); xa_init_flags(&ctx->personalities, XA_FLAGS_ALLOC1); mutex_init(&ctx->uring_lock); @@ -2469,6 +2471,7 @@ static __cold void io_ring_ctx_free(struct io_ring_ctx *ctx) __io_cqring_overflow_flush(ctx, true); io_eventfd_unregister(ctx); io_alloc_cache_free(&ctx->apoll_cache, io_apoll_cache_free); + io_alloc_cache_free(&ctx->netmsg_cache, io_netmsg_cache_free); mutex_unlock(&ctx->uring_lock); io_destroy_buffers(ctx); if (ctx->sq_creds) diff --git a/io_uring/net.c b/io_uring/net.c index 6679069eeef1..185553174437 100644 --- a/io_uring/net.c +++ b/io_uring/net.c @@ -12,6 +12,7 @@ #include "io_uring.h" #include "kbuf.h" +#include "alloc_cache.h" #include "net.h" #if defined(CONFIG_NET) @@ -97,18 +98,55 @@ static bool io_net_retry(struct socket *sock, int flags) return sock->type == SOCK_STREAM || sock->type == SOCK_SEQPACKET; } +static void io_netmsg_recycle(struct io_kiocb *req, unsigned int issue_flags) +{ + struct io_async_msghdr *hdr = req->async_data; + + if (!hdr || issue_flags & IO_URING_F_UNLOCKED) + return; + + /* Let normal cleanup path reap it if we fail adding to the cache */ + if (io_alloc_cache_put(&req->ctx->netmsg_cache, &hdr->cache)) { + req->async_data = NULL; + req->flags &= ~REQ_F_ASYNC_DATA; + } +} + +static struct io_async_msghdr *io_recvmsg_alloc_async(struct io_kiocb *req, + unsigned int issue_flags) +{ + struct io_ring_ctx *ctx = req->ctx; + struct io_cache_entry *entry; + + if (!(issue_flags & IO_URING_F_UNLOCKED) && + (entry = io_alloc_cache_get(&ctx->netmsg_cache)) != NULL) { + struct io_async_msghdr *hdr; + + hdr = container_of(entry, struct io_async_msghdr, cache); + req->flags |= REQ_F_ASYNC_DATA; + req->async_data = hdr; + return hdr; + } + + if (!io_alloc_async_data(req)) + return req->async_data; + + return NULL; +} + static int io_setup_async_msg(struct io_kiocb *req, - struct io_async_msghdr *kmsg) + struct io_async_msghdr *kmsg, + unsigned int issue_flags) { struct io_async_msghdr *async_msg = req->async_data; if (async_msg) return -EAGAIN; - if (io_alloc_async_data(req)) { + async_msg = io_recvmsg_alloc_async(req, issue_flags); + if (!async_msg) { kfree(kmsg->free_iov); return -ENOMEM; } - async_msg = req->async_data; req->flags |= REQ_F_NEED_CLEANUP; memcpy(async_msg, kmsg, sizeof(*kmsg)); async_msg->msg.msg_name = &async_msg->addr; @@ -195,7 +233,7 @@ int io_sendmsg(struct io_kiocb *req, unsigned int issue_flags) if (!(req->flags & REQ_F_POLLED) && (sr->flags & IORING_RECVSEND_POLL_FIRST)) - return io_setup_async_msg(req, kmsg); + return io_setup_async_msg(req, kmsg, issue_flags); flags = sr->msg_flags; if (issue_flags & IO_URING_F_NONBLOCK) @@ -207,13 +245,13 @@ int io_sendmsg(struct io_kiocb *req, unsigned int issue_flags) if (ret < min_ret) { if (ret == -EAGAIN && (issue_flags & IO_URING_F_NONBLOCK)) - return io_setup_async_msg(req, kmsg); + return io_setup_async_msg(req, kmsg, issue_flags); if (ret == -ERESTARTSYS) ret = -EINTR; if (ret > 0 && io_net_retry(sock, flags)) { sr->done_io += ret; req->flags |= REQ_F_PARTIAL_IO; - return io_setup_async_msg(req, kmsg); + return io_setup_async_msg(req, kmsg, issue_flags); } req_set_fail(req); } @@ -221,6 +259,7 @@ int io_sendmsg(struct io_kiocb *req, unsigned int issue_flags) if (kmsg->free_iov) kfree(kmsg->free_iov); req->flags &= ~REQ_F_NEED_CLEANUP; + io_netmsg_recycle(req, issue_flags); if (ret >= 0) ret += sr->done_io; else if (sr->done_io) @@ -495,7 +534,7 @@ int io_recvmsg(struct io_kiocb *req, unsigned int issue_flags) if (!(req->flags & REQ_F_POLLED) && (sr->flags & IORING_RECVSEND_POLL_FIRST)) - return io_setup_async_msg(req, kmsg); + return io_setup_async_msg(req, kmsg, issue_flags); if (io_do_buffer_select(req)) { void __user *buf; @@ -519,13 +558,13 @@ int io_recvmsg(struct io_kiocb *req, unsigned int issue_flags) ret = __sys_recvmsg_sock(sock, &kmsg->msg, sr->umsg, kmsg->uaddr, flags); if (ret < min_ret) { if (ret == -EAGAIN && force_nonblock) - return io_setup_async_msg(req, kmsg); + return io_setup_async_msg(req, kmsg, issue_flags); if (ret == -ERESTARTSYS) ret = -EINTR; if (ret > 0 && io_net_retry(sock, flags)) { sr->done_io += ret; req->flags |= REQ_F_PARTIAL_IO; - return io_setup_async_msg(req, kmsg); + return io_setup_async_msg(req, kmsg, issue_flags); } req_set_fail(req); } else if ((flags & MSG_WAITALL) && (kmsg->msg.msg_flags & (MSG_TRUNC | MSG_CTRUNC))) { @@ -535,6 +574,7 @@ int io_recvmsg(struct io_kiocb *req, unsigned int issue_flags) /* fast path, check for non-NULL to avoid function call */ if (kmsg->free_iov) kfree(kmsg->free_iov); + io_netmsg_recycle(req, issue_flags); req->flags &= ~REQ_F_NEED_CLEANUP; if (ret > 0) ret += sr->done_io; @@ -848,4 +888,9 @@ int io_connect(struct io_kiocb *req, unsigned int issue_flags) io_req_set_res(req, ret, 0); return IOU_OK; } + +void io_netmsg_cache_free(struct io_cache_entry *entry) +{ + kfree(container_of(entry, struct io_async_msghdr, cache)); +} #endif diff --git a/io_uring/net.h b/io_uring/net.h index 81d71d164770..178a6d8b76e0 100644 --- a/io_uring/net.h +++ b/io_uring/net.h @@ -3,9 +3,14 @@ #include #include +#include "alloc_cache.h" + #if defined(CONFIG_NET) struct io_async_msghdr { - struct iovec fast_iov[UIO_FASTIOV]; + union { + struct iovec fast_iov[UIO_FASTIOV]; + struct io_cache_entry cache; + }; /* points to an allocated iov, if NULL we use fast_iov instead */ struct iovec *free_iov; struct sockaddr __user *uaddr; @@ -40,4 +45,10 @@ int io_socket(struct io_kiocb *req, unsigned int issue_flags); int io_connect_prep_async(struct io_kiocb *req); int io_connect_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe); int io_connect(struct io_kiocb *req, unsigned int issue_flags); + +void io_netmsg_cache_free(struct io_cache_entry *entry); +#else +static inline void io_netmsg_cache_free(struct io_cache_entry *entry) +{ +} #endif -- 2.35.1