From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:51335) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VAOnM-0004eU-IV for qemu-devel@nongnu.org; Fri, 16 Aug 2013 14:30:50 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VAOnI-0008NN-BC for qemu-devel@nongnu.org; Fri, 16 Aug 2013 14:30:44 -0400 Received: from mail.avalus.com ([2001:41c8:10:1dd::10]:50243) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VAOnH-0008MM-T4 for qemu-devel@nongnu.org; Fri, 16 Aug 2013 14:30:40 -0400 From: Alex Bligh Date: Fri, 16 Aug 2013 19:29:56 +0100 Message-Id: <1376677812-9448-16-git-send-email-alex@alex.org.uk> In-Reply-To: <1376677812-9448-1-git-send-email-alex@alex.org.uk> References: <1376677812-9448-1-git-send-email-alex@alex.org.uk> Subject: [Qemu-devel] [PATCHv12 15/31] aio / timers: Convert aio_poll to use AioContext timers' deadline List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Kevin Wolf , Anthony Liguori , Alex Bligh , Jan Kiszka , liu ping fan , Stefan Hajnoczi , Paolo Bonzini , MORITA Kazutaka , rth@twiddle.net Convert aio_poll to use deadline based on AioContext's timers. aio_poll has been changed to return accurately whether progress has occurred. Prior to this commit, aio_poll always returned true if g_poll was entered, whether or not any progress was made. This required a change to tests/test-aio.c where an assert was backwards. Signed-off-by: Alex Bligh --- aio-posix.c | 18 ++++++++++++------ aio-win32.c | 20 ++++++++++++++++++-- 2 files changed, 30 insertions(+), 8 deletions(-) diff --git a/aio-posix.c b/aio-posix.c index 2440eb9..bd06f33 100644 --- a/aio-posix.c +++ b/aio-posix.c @@ -165,6 +165,10 @@ static bool aio_dispatch(AioContext *ctx) g_free(tmp); } } + + /* Run our timers */ + progress |= timerlistgroup_run_timers(&ctx->tlg); + return progress; } @@ -219,9 +223,9 @@ bool aio_poll(AioContext *ctx, bool blocking) } /* wait until next event */ - ret = g_poll((GPollFD *)ctx->pollfds->data, - ctx->pollfds->len, - blocking ? -1 : 0); + ret = qemu_poll_ns((GPollFD *)ctx->pollfds->data, + ctx->pollfds->len, + blocking ? timerlistgroup_deadline_ns(&ctx->tlg) : 0); /* if we have any readable fds, dispatch event */ if (ret > 0) { @@ -232,9 +236,11 @@ bool aio_poll(AioContext *ctx, bool blocking) node->pfd.revents = pfd->revents; } } - if (aio_dispatch(ctx)) { - progress = true; - } + } + + /* Run dispatch even if there were no readable fds to run timers */ + if (aio_dispatch(ctx)) { + progress = true; } return progress; diff --git a/aio-win32.c b/aio-win32.c index 78b2801..335bd20 100644 --- a/aio-win32.c +++ b/aio-win32.c @@ -95,6 +95,7 @@ bool aio_poll(AioContext *ctx, bool blocking) HANDLE events[MAXIMUM_WAIT_OBJECTS + 1]; bool progress; int count; + int timeout; progress = false; @@ -108,6 +109,9 @@ bool aio_poll(AioContext *ctx, bool blocking) progress = true; } + /* Run timers */ + progress |= timerlistgroup_run_timers(&ctx->tlg); + /* * Then dispatch any pending callbacks from the GSource. * @@ -164,8 +168,11 @@ bool aio_poll(AioContext *ctx, bool blocking) /* wait until next event */ while (count > 0) { - int timeout = blocking ? INFINITE : 0; - int ret = WaitForMultipleObjects(count, events, FALSE, timeout); + int ret; + + timeout = blocking ? + qemu_timeout_ns_to_ms(timerlistgroup_deadline_ns(&ctx->tlg)) : 0; + ret = WaitForMultipleObjects(count, events, FALSE, timeout); /* if we have any signaled events, dispatch event */ if ((DWORD) (ret - WAIT_OBJECT_0) >= count) { @@ -208,5 +215,14 @@ bool aio_poll(AioContext *ctx, bool blocking) events[ret - WAIT_OBJECT_0] = events[--count]; } + if (blocking) { + /* Run the timers a second time. We do this because otherwise aio_wait + * will not note progress - and will stop a drain early - if we have + * a timer that was not ready to run entering g_poll but is ready + * after g_poll. This will only do anything if a timer has expired. + */ + progress |= timerlistgroup_run_timers(ctx->timer_list); + } + return progress; } -- 1.7.9.5