From patchwork Tue Jan 14 10:59:15 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Hajnoczi X-Patchwork-Id: 1222685 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=if7CYnpD; dkim-atps=neutral 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 ozlabs.org (Postfix) with ESMTPS id 47xngk1s1Nz9sP6 for ; 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bh=EdhpjWEWIjVtO+UGn2spiFs+BkXRjtSL4P/3dtsliQs=; b=if7CYnpDwlKrnK/rlBnEKgF/B1Pr2Dy9RjfdAEjFDk5nThirE+zvdFGJd8cJfvTpexK2/j jw/Abz11e+xX1t3TFNPT2KR9FT3rUw7jD7cs0UPSxDnUY8OfbwCOwpGvWzN4lHLm3OGGAi 8+SVhzeOfb91qxT8sHKoopCF43OvET4= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-192-QRQMnA04Mw-f4PxD8HUZ4w-1; Tue, 14 Jan 2020 06:00:52 -0500 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 982EA100550E; Tue, 14 Jan 2020 11:00:51 +0000 (UTC) Received: from localhost (unknown [10.36.118.18]) by smtp.corp.redhat.com (Postfix) with ESMTP id C08C319C70; Tue, 14 Jan 2020 11:00:43 +0000 (UTC) From: Stefan Hajnoczi To: qemu-devel@nongnu.org Subject: [PATCH v4 09/15] block: add trace events for io_uring Date: Tue, 14 Jan 2020 10:59:15 +0000 Message-Id: <20200114105921.131880-10-stefanha@redhat.com> In-Reply-To: <20200114105921.131880-1-stefanha@redhat.com> References: <20200114105921.131880-1-stefanha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-MC-Unique: QRQMnA04Mw-f4PxD8HUZ4w-1 X-Mimecast-Spam-Score: 0 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 205.139.110.61 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 , Fam Zheng , qemu-block@nongnu.org, oleksandr@redhat.com, Julia Suvorova , Markus Armbruster , Max Reitz , Stefan Hajnoczi , Paolo Bonzini , Aarushi Mehta , Stefano Garzarella Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" From: Aarushi Mehta Signed-off-by: Aarushi Mehta Acked-by: Stefano Garzarella Signed-off-by: Stefan Hajnoczi --- block/io_uring.c | 23 ++++++++++++++++++++--- block/trace-events | 12 ++++++++++++ 2 files changed, 32 insertions(+), 3 deletions(-) diff --git a/block/io_uring.c b/block/io_uring.c index bb433a685b..a5c0d16220 100644 --- a/block/io_uring.c +++ b/block/io_uring.c @@ -17,6 +17,7 @@ #include "block/raw-aio.h" #include "qemu/coroutine.h" #include "qapi/error.h" +#include "trace.h" /* io_uring ring size */ #define MAX_ENTRIES 128 @@ -85,6 +86,8 @@ static void luring_resubmit_short_read(LuringState *s, LuringAIOCB *luringcb, QEMUIOVector *resubmit_qiov; size_t remaining; + trace_luring_resubmit_short_read(s, luringcb, nread); + /* Update read position */ luringcb->total_read = nread; remaining = luringcb->qiov->size - luringcb->total_read; @@ -156,6 +159,7 @@ static void luring_process_completions(LuringState *s) /* Change counters one-by-one because we can be nested. */ s->io_q.in_flight--; + trace_luring_process_completion(s, luringcb, ret); /* total_read is non-zero only for resubmitted read requests */ total_bytes = ret + luringcb->total_read; @@ -224,6 +228,7 @@ static int ioq_submit(LuringState *s) QSIMPLEQ_REMOVE_HEAD(&s->io_q.submit_queue, next); } ret = io_uring_submit(&s->ring); + trace_luring_io_uring_submit(s, ret); /* Prevent infinite loop if submission is refused */ if (ret <= 0) { if (ret == -EAGAIN) { @@ -280,12 +285,15 @@ static void ioq_init(LuringQueue *io_q) void luring_io_plug(BlockDriverState *bs, LuringState *s) { + trace_luring_io_plug(s); s->io_q.plugged++; } void luring_io_unplug(BlockDriverState *bs, LuringState *s) { assert(s->io_q.plugged); + trace_luring_io_unplug(s, s->io_q.blocked, s->io_q.plugged, + s->io_q.in_queue, s->io_q.in_flight); if (--s->io_q.plugged == 0 && !s->io_q.blocked && s->io_q.in_queue > 0) { ioq_submit(s); @@ -306,6 +314,7 @@ void luring_io_unplug(BlockDriverState *bs, LuringState *s) static int luring_do_submit(int fd, LuringAIOCB *luringcb, LuringState *s, uint64_t offset, int type) { + int ret; struct io_uring_sqe *sqes = &luringcb->sqeq; switch (type) { @@ -329,11 +338,14 @@ static int luring_do_submit(int fd, LuringAIOCB *luringcb, LuringState *s, QSIMPLEQ_INSERT_TAIL(&s->io_q.submit_queue, luringcb, next); s->io_q.in_queue++; - + trace_luring_do_submit(s, s->io_q.blocked, s->io_q.plugged, + s->io_q.in_queue, s->io_q.in_flight); if (!s->io_q.blocked && (!s->io_q.plugged || s->io_q.in_flight + s->io_q.in_queue >= MAX_ENTRIES)) { - return ioq_submit(s); + ret = ioq_submit(s); + trace_luring_do_submit_done(s, ret); + return ret; } return 0; } @@ -348,8 +360,10 @@ int coroutine_fn luring_co_submit(BlockDriverState *bs, LuringState *s, int fd, .qiov = qiov, .is_read = (type == QEMU_AIO_READ), }; - + trace_luring_co_submit(bs, s, &luringcb, fd, offset, qiov ? qiov->size : 0, + type); ret = luring_do_submit(fd, &luringcb, s, offset, type); + if (ret < 0) { return ret; } @@ -382,6 +396,8 @@ LuringState *luring_init(Error **errp) LuringState *s = g_new0(LuringState, 1); struct io_uring *ring = &s->ring; + trace_luring_init_state(s, sizeof(*s)); + rc = io_uring_queue_init(MAX_ENTRIES, ring, 0); if (rc < 0) { error_setg_errno(errp, errno, "failed to init linux io_uring ring"); @@ -398,4 +414,5 @@ void luring_cleanup(LuringState *s) { io_uring_queue_exit(&s->ring); g_free(s); + trace_luring_cleanup_state(s); } diff --git a/block/trace-events b/block/trace-events index 6ba86decca..1a7329b736 100644 --- a/block/trace-events +++ b/block/trace-events @@ -63,6 +63,18 @@ qmp_block_stream(void *bs) "bs %p" file_paio_submit(void *acb, void *opaque, int64_t offset, int count, int type) "acb %p opaque %p offset %"PRId64" count %d type %d" file_copy_file_range(void *bs, int src, int64_t src_off, int dst, int64_t dst_off, int64_t bytes, int flags, int64_t ret) "bs %p src_fd %d offset %"PRIu64" dst_fd %d offset %"PRIu64" bytes %"PRIu64" flags %d ret %"PRId64 +#io_uring.c +luring_init_state(void *s, size_t size) "s %p size %zu" +luring_cleanup_state(void *s) "%p freed" +luring_io_plug(void *s) "LuringState %p plug" +luring_io_unplug(void *s, int blocked, int plugged, int queued, int inflight) "LuringState %p blocked %d plugged %d queued %d inflight %d" +luring_do_submit(void *s, int blocked, int plugged, int queued, int inflight) "LuringState %p blocked %d plugged %d queued %d inflight %d" +luring_do_submit_done(void *s, int ret) "LuringState %p submitted to kernel %d" +luring_co_submit(void *bs, void *s, void *luringcb, int fd, uint64_t offset, 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 luringcb %p ret %d" +luring_io_uring_submit(void *s, int ret) "LuringState %p ret %d" +luring_resubmit_short_read(void *s, void *luringcb, int nread) "LuringState %p luringcb %p nread %d" + # qcow2.c qcow2_add_task(void *co, void *bs, void *pool, const char *action, int cluster_type, uint64_t file_cluster_offset, uint64_t offset, uint64_t bytes, void *qiov, size_t qiov_offset) "co %p bs %p pool %p: %s: cluster_type %d file_cluster_offset %" PRIu64 " offset %" PRIu64 " bytes %" PRIu64 " qiov %p qiov_offset %zu" qcow2_writev_start_req(void *co, int64_t offset, int bytes) "co %p offset 0x%" PRIx64 " bytes %d"