From nobody Mon Feb 9 12:25:56 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1563222030; cv=none; d=zoho.com; s=zohoarc; b=KIEhjpxL51gKrZ6KdS1GxGVirTMFX15ax+K6y96ZaLU0aze2IHhYbG5dm1TnrS7j/RkkmXT0RDcfF+jAQgjZHKgoYys0ZgG4p5JeQZ3q9kHerf76rLl4znSVYN3iEPU9TGMjp3zxLa/72j6kIkkT8Itl4IFMPNcyJ2JAJNUK8o8= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1563222030; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To:ARC-Authentication-Results; bh=aYDAtJYqYO97MwkndGvFBOuX1/+cNBotpZVpr1lhsis=; b=EfU9IXt/jX/n9662QJmodBciy0m3TZvCuWHF4VMqcJ+VGi9hrJ71p2IIs+vakBoQXi7PWPqHm1JK9jURywIqQ4faBPya5fV4GXrxAqFdMgRA9rmonGzIESHIUGFvot5wF5gjfon19sC5ejdYPLx5i64AEwzlibZLAIdewOcEolc= ARC-Authentication-Results: i=1; mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1563222030651535.2453985981639; Mon, 15 Jul 2019 13:20:30 -0700 (PDT) Received: from localhost ([::1]:42610 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hn7SU-0005uB-VS for importer@patchew.org; Mon, 15 Jul 2019 16:20:26 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:55260) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hn7SB-0004sD-G4 for qemu-devel@nongnu.org; Mon, 15 Jul 2019 16:20:08 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hn7SA-0007RY-FJ for qemu-devel@nongnu.org; Mon, 15 Jul 2019 16:20:07 -0400 Received: from mx1.redhat.com ([209.132.183.28]:47034) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hn7S8-0007Pm-AU; Mon, 15 Jul 2019 16:20:04 -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 A463CC00C7DD; Mon, 15 Jul 2019 20:20:03 +0000 (UTC) Received: from localhost (ovpn-117-120.ams2.redhat.com [10.36.117.120]) by smtp.corp.redhat.com (Postfix) with ESMTP id 7590A1001B35; Mon, 15 Jul 2019 20:19:58 +0000 (UTC) From: Stefan Hajnoczi To: qemu-devel@nongnu.org Date: Mon, 15 Jul 2019 21:19:48 +0100 Message-Id: <20190715201950.9444-2-stefanha@redhat.com> In-Reply-To: <20190715201950.9444-1-stefanha@redhat.com> References: <20190715201950.9444-1-stefanha@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 [10.5.110.31]); Mon, 15 Jul 2019 20:20:03 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH 1/3] block/io_uring: add submission and completion trace events 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 , qemu-block@nongnu.org, Max Reitz , Stefan Hajnoczi , Stefan Hajnoczi , Julia Suvorova , Aarushi Mehta Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" It is useful to follow individual requests as they are submitted. Add trace events that show details of each request. Signed-off-by: Stefan Hajnoczi Reviewed-by: Philippe Mathieu-Daud=C3=A9 --- block/io_uring.c | 5 +++++ block/trace-events | 3 +++ 2 files changed, 8 insertions(+) diff --git a/block/io_uring.c b/block/io_uring.c index 22e8d3d9ca..19919da4c9 100644 --- a/block/io_uring.c +++ b/block/io_uring.c @@ -128,6 +128,8 @@ static void luring_process_completions(LuringState *s) LuringAIOCB *luringcb =3D io_uring_cqe_get_data(cqes); ret =3D cqes->res; =20 + trace_luring_process_completion(s, luringcb, ret); + if (ret =3D=3D luringcb->qiov->size) { ret =3D 0; } else if (ret >=3D 0) { @@ -233,6 +235,7 @@ static int ioq_submit(LuringState *s) QSIMPLEQ_REMOVE_HEAD(&s->io_q.sq_overflow, next); } ret =3D io_uring_submit(&s->ring); + trace_luring_io_uring_submit(s, ret); /* Prevent infinite loop if submission is refused */ if (ret <=3D 0) { if (ret =3D=3D -EAGAIN) { @@ -339,6 +342,8 @@ int coroutine_fn luring_co_submit(BlockDriverState *bs,= LuringState *s, int fd, .is_read =3D (type =3D=3D QEMU_AIO_READ), }; =20 + trace_luring_co_submit(bs, s, &luringcb, fd, offset, qiov ? qiov->size= : 0, type); + ret =3D luring_do_submit(fd, &luringcb, s, offset, type); if (ret < 0) { return ret; diff --git a/block/trace-events b/block/trace-events index 069779773b..02952fe4cb 100644 --- a/block/trace-events +++ b/block/trace-events @@ -67,6 +67,9 @@ luring_io_plug(void *s) "LuringState %p plug" luring_io_unplug(void *s, int blocked, int plugged, int queued, int inflig= ht) "LuringState %p blocked %d plugged %d queued %d inflight %d" luring_do_submit(void *s, int blocked, int plugged, int queued, int inflig= ht) "LuringState %p blocked %d plugged %d queued %d inflight %d" luring_do_submit_done(void *s, int ret) "LuringState %p submitted to kerne= l %d" +luring_co_submit(void *bs, void *s, void *luringcb, int fd, uint64_t offse= t, size_t nbytes, int type) "bs %p s %p luringcb %p fd %d offset %" PRId64 = " nbytes %zd type %d" +luring_process_completion(void *s, void *aiocb, int ret) "LuringState %p l= uringcb %p ret %d" +luring_io_uring_submit(void *s, int ret) "LuringState %p ret %d" =20 # qcow2.c qcow2_writev_start_req(void *co, int64_t offset, int bytes) "co %p offset = 0x%" PRIx64 " bytes %d" --=20 2.21.0