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 X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AFE01C4360C for ; Thu, 10 Oct 2019 12:12:00 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 8717520673 for ; Thu, 10 Oct 2019 12:12:00 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8717520673 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:36970 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iIXIV-0004oy-C1 for qemu-devel@archiver.kernel.org; Thu, 10 Oct 2019 08:11:59 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:51587) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iIWqh-0006DN-0A for qemu-devel@nongnu.org; Thu, 10 Oct 2019 07:43:16 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iIWqf-000841-96 for qemu-devel@nongnu.org; Thu, 10 Oct 2019 07:43:14 -0400 Received: from mx1.redhat.com ([209.132.183.28]:38996) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iIWqb-00081r-O7; Thu, 10 Oct 2019 07:43:10 -0400 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 49BE883F3D; Thu, 10 Oct 2019 11:43:07 +0000 (UTC) Received: from localhost (unknown [10.36.118.5]) by smtp.corp.redhat.com (Postfix) with ESMTPS id BA18710013A1; Thu, 10 Oct 2019 11:43:06 +0000 (UTC) From: Max Reitz To: qemu-block@nongnu.org Subject: [PULL 02/36] block: introduce aio task pool Date: Thu, 10 Oct 2019 13:42:26 +0200 Message-Id: <20191010114300.7746-3-mreitz@redhat.com> In-Reply-To: <20191010114300.7746-1-mreitz@redhat.com> References: <20191010114300.7746-1-mreitz@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Thu, 10 Oct 2019 11:43:07 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , Peter Maydell , qemu-devel@nongnu.org, Max Reitz Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Vladimir Sementsov-Ogievskiy Common interface for aio task loops. To be used for improving performance of synchronous io loops in qcow2, block-stream, copy-on-read, and may be other places. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Max Reitz Message-id: 20190916175324.18478-3-vsementsov@virtuozzo.com Signed-off-by: Max Reitz --- block/Makefile.objs | 2 + include/block/aio_task.h | 54 +++++++++++++++++ block/aio_task.c | 124 +++++++++++++++++++++++++++++++++++++++ 3 files changed, 180 insertions(+) create mode 100644 include/block/aio_task.h create mode 100644 block/aio_task.c diff --git a/block/Makefile.objs b/block/Makefile.objs index 35f3bca4d9..c2eb8c8769 100644 --- a/block/Makefile.objs +++ b/block/Makefile.objs @@ -40,6 +40,8 @@ block-obj-y +=3D throttle.o copy-on-read.o =20 block-obj-y +=3D crypto.o =20 +block-obj-y +=3D aio_task.o + common-obj-y +=3D stream.o =20 nfs.o-libs :=3D $(LIBNFS_LIBS) diff --git a/include/block/aio_task.h b/include/block/aio_task.h new file mode 100644 index 0000000000..50bc1e1817 --- /dev/null +++ b/include/block/aio_task.h @@ -0,0 +1,54 @@ +/* + * Aio tasks loops + * + * Copyright (c) 2019 Virtuozzo International GmbH. + * + * Permission is hereby granted, free of charge, to any person obtaining= a copy + * of this software and associated documentation files (the "Software"),= to deal + * in the Software without restriction, including without limitation the= rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or = sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be includ= ed in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRE= SS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILI= TY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHA= LL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR = OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISI= NG FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALING= S IN + * THE SOFTWARE. + */ + +#ifndef BLOCK_AIO_TASK_H +#define BLOCK_AIO_TASK_H + +#include "qemu/coroutine.h" + +typedef struct AioTaskPool AioTaskPool; +typedef struct AioTask AioTask; +typedef int coroutine_fn (*AioTaskFunc)(AioTask *task); +struct AioTask { + AioTaskPool *pool; + AioTaskFunc func; + int ret; +}; + +AioTaskPool *coroutine_fn aio_task_pool_new(int max_busy_tasks); +void aio_task_pool_free(AioTaskPool *); + +/* error code of failed task or 0 if all is OK */ +int aio_task_pool_status(AioTaskPool *pool); + +bool aio_task_pool_empty(AioTaskPool *pool); + +/* User provides filled @task, however task->pool will be set automatica= lly */ +void coroutine_fn aio_task_pool_start_task(AioTaskPool *pool, AioTask *t= ask); + +void coroutine_fn aio_task_pool_wait_slot(AioTaskPool *pool); +void coroutine_fn aio_task_pool_wait_one(AioTaskPool *pool); +void coroutine_fn aio_task_pool_wait_all(AioTaskPool *pool); + +#endif /* BLOCK_AIO_TASK_H */ diff --git a/block/aio_task.c b/block/aio_task.c new file mode 100644 index 0000000000..88989fa248 --- /dev/null +++ b/block/aio_task.c @@ -0,0 +1,124 @@ +/* + * Aio tasks loops + * + * Copyright (c) 2019 Virtuozzo International GmbH. + * + * Permission is hereby granted, free of charge, to any person obtaining= a copy + * of this software and associated documentation files (the "Software"),= to deal + * in the Software without restriction, including without limitation the= rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or = sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be includ= ed in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRE= SS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILI= TY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHA= LL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR = OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISI= NG FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALING= S IN + * THE SOFTWARE. + */ + +#include "qemu/osdep.h" +#include "block/aio.h" +#include "block/aio_task.h" + +struct AioTaskPool { + Coroutine *main_co; + int status; + int max_busy_tasks; + int busy_tasks; + bool waiting; +}; + +static void coroutine_fn aio_task_co(void *opaque) +{ + AioTask *task =3D opaque; + AioTaskPool *pool =3D task->pool; + + assert(pool->busy_tasks < pool->max_busy_tasks); + pool->busy_tasks++; + + task->ret =3D task->func(task); + + pool->busy_tasks--; + + if (task->ret < 0 && pool->status =3D=3D 0) { + pool->status =3D task->ret; + } + + g_free(task); + + if (pool->waiting) { + pool->waiting =3D false; + aio_co_wake(pool->main_co); + } +} + +void coroutine_fn aio_task_pool_wait_one(AioTaskPool *pool) +{ + assert(pool->busy_tasks > 0); + assert(qemu_coroutine_self() =3D=3D pool->main_co); + + pool->waiting =3D true; + qemu_coroutine_yield(); + + assert(!pool->waiting); + assert(pool->busy_tasks < pool->max_busy_tasks); +} + +void coroutine_fn aio_task_pool_wait_slot(AioTaskPool *pool) +{ + if (pool->busy_tasks < pool->max_busy_tasks) { + return; + } + + aio_task_pool_wait_one(pool); +} + +void coroutine_fn aio_task_pool_wait_all(AioTaskPool *pool) +{ + while (pool->busy_tasks > 0) { + aio_task_pool_wait_one(pool); + } +} + +void coroutine_fn aio_task_pool_start_task(AioTaskPool *pool, AioTask *t= ask) +{ + aio_task_pool_wait_slot(pool); + + task->pool =3D pool; + qemu_coroutine_enter(qemu_coroutine_create(aio_task_co, task)); +} + +AioTaskPool *coroutine_fn aio_task_pool_new(int max_busy_tasks) +{ + AioTaskPool *pool =3D g_new0(AioTaskPool, 1); + + pool->main_co =3D qemu_coroutine_self(); + pool->max_busy_tasks =3D max_busy_tasks; + + return pool; +} + +void aio_task_pool_free(AioTaskPool *pool) +{ + g_free(pool); +} + +int aio_task_pool_status(AioTaskPool *pool) +{ + if (!pool) { + return 0; /* Sugar for lazy allocation of aio pool */ + } + + return pool->status; +} + +bool aio_task_pool_empty(AioTaskPool *pool) +{ + return pool->busy_tasks =3D=3D 0; +} --=20 2.21.0