From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40963) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WGrNd-0003BD-J2 for qemu-devel@nongnu.org; Fri, 21 Feb 2014 09:47:15 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WGrNW-0006fE-NO for qemu-devel@nongnu.org; Fri, 21 Feb 2014 09:47:09 -0500 Received: from mx1.redhat.com ([209.132.183.28]:49585) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WGrNW-0006f8-EG for qemu-devel@nongnu.org; Fri, 21 Feb 2014 09:47:02 -0500 From: Stefan Hajnoczi Date: Fri, 21 Feb 2014 15:46:52 +0100 Message-Id: <1392994018-7786-1-git-send-email-stefanha@redhat.com> Subject: [Qemu-devel] [PATCH v4 0/6] dataplane: switch to N:M devices-per-thread model List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Kevin Wolf , Paolo Bonzini , Fam Zheng , Michael Roth v2: * Based off Igor's "-object/object-add support custom location and 2nd stage initialization" series * Dropped dedicated -iothread option in favor of -object * Avoid re-acquiring rfifo in iothread_run() [mdroth] v3: * Fixed "Reliquinish" typo [fam] * Rebased onto qemu.git/master which now has Igor's -object improvements v4: * Rename qdev property to virtio-blk-pci,x-iothread= since we will switch to QOM links once object_property_add_link() is fixed [bonzini] This series moves the event loop thread out of dataplane code. It makes -object iothread,id=foo a separate concept so several devices can be bound to same iothread. Syntax: qemu -object iothread,id=iothread0 \ -device virtio-blk-pci,x-iothread=iothread0,x-data-plane=on,... For backwards-compatibility the iothread= parameter can be omitted. A per-device IOThread will be created behind the scenes (just like the old 1:1 threading model). This series includes the aio_context_acquire/release API which makes it easy to synchronize access to AioContext across threads. After this series I will send separate patches for a "query-iothreads" command that returns thread IDs similar to "query-cpus". This will allow binding dataplane threads to host CPUs. Stefan Hajnoczi (6): rfifolock: add recursive FIFO lock aio: add aio_context_acquire() and aio_context_release() iothread: add I/O thread object qdev: add get_pointer_and_free() for temporary strings iothread: add "iothread" qdev property type dataplane: replace internal thread with IOThread Makefile.objs | 1 + async.c | 18 ++++++ hw/block/dataplane/virtio-blk.c | 96 +++++++++++++++++------------- hw/core/qdev-properties-system.c | 65 +++++++++++++++++++++ include/block/aio.h | 18 ++++++ include/hw/qdev-properties.h | 3 + include/hw/virtio/virtio-blk.h | 8 ++- include/qemu/rfifolock.h | 54 +++++++++++++++++ include/sysemu/iothread.h | 30 ++++++++++ iothread.c | 123 +++++++++++++++++++++++++++++++++++++++ tests/Makefile | 2 + tests/test-aio.c | 58 ++++++++++++++++++ tests/test-rfifolock.c | 90 ++++++++++++++++++++++++++++ util/Makefile.objs | 1 + util/rfifolock.c | 78 +++++++++++++++++++++++++ 15 files changed, 601 insertions(+), 44 deletions(-) create mode 100644 include/qemu/rfifolock.h create mode 100644 include/sysemu/iothread.h create mode 100644 iothread.c create mode 100644 tests/test-rfifolock.c create mode 100644 util/rfifolock.c -- 1.8.5.3