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Re: [Qemu-devel] [PATCH v2 00/12] Portable thread-pool/AIO, Win32 emulat
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [PATCH v2 00/12] Portable thread-pool/AIO, Win32 emulated AIO |
Date: |
Thu, 25 Oct 2012 18:23:02 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:16.0) Gecko/20121016 Thunderbird/16.0.1 |
Il 25/10/2012 18:01, Stefan Hajnoczi ha scritto:
> On Tue, Aug 7, 2012 at 1:17 PM, Paolo Bonzini <address@hidden> wrote:
>> This patch series is part 2 in my EventNotifier/AIO improvements
>> for QEMU 1.2. It extends use of EventNotifier to the main loop
>> and AIO subsystems. A new API using EventNotifier is added to aio.c
>> and a new portable thread pool is introduced (based on code from
>> posix-aio-compat.c, mostly) that uses this API. raw-posix.c is
>> converted to use the new thread pool, and support for asynchronous
>> I/O is finally added to Win32 as well.
>>
>> The network drivers (curl, libiscsi, nbd) have to be disabled
>> under Windows. They are unlikely to have any users, since they
>> were broken until 1.0 and (unlike slirp) we never had any report.
>>
>> I tested this under Wine, with a RHEL virtual machine booting just as
>> glacially as before. "info blockstats" does show a slightly higher
>> overhead, so I would like this to be tested on real Windows hosts.
>> Even if the result is negative, I would prefer to keep the early
>> parts (i.e. drop only the last patch) since they are a prerequisite for
>> improvements to block/raw-posix.c (such as asynchronous discard
>> support) scheduled for 1.3. The platform independent APIs introduced
>> by patches 4 and 5 are also useful for native AIO on Win32.
>>
>>
>> Paolo Bonzini (12):
>> event_notifier: enable it to use pipes
>> event_notifier: add Win32 implementation
>> main-loop: use event notifiers
>> aio: provide platform-independent API
>> aio: add Win32 implementation
>> linux-aio: use event notifiers
>> qemu-thread: add QemuSemaphore
>> aio: add generic thread-pool facility
>> block: switch posix-aio-compat to threadpool
>> raw: merge posix-aio-compat.c into block/raw-posix.c
>> raw-posix: rename raw-posix-aio.h, hide unavailable prototypes
>> raw-win32: add emulated AIO support
>>
>> Makefile.objs | 12 +-
>> aio.c => aio-posix.c | 9 +
>> aio-win32.c | 177 +++++++++
>> block/Makefile.objs | 6 +-
>> block/{raw-posix-aio.h => raw-aio.h} | 19 +-
>> block/raw-posix.c | 297 ++++++++++++++-
>> block/raw-win32.c | 187 +++++++---
>> event_notifier-posix.c | 118 ++++++
>> event_notifier-win32.c | 59 +++
>> event_notifier.c | 67 ----
>> event_notifier.h | 20 +-
>> linux-aio.c | 51 ++-
>> main-loop.c | 106 +-----
>> oslib-posix.c | 31 --
>> posix-aio-compat.c | 679
>> -----------------------------------
>> qemu-aio.h | 19 +-
>> qemu-common.h | 1 -
>> qemu-thread-posix.c | 74 ++++
>> qemu-thread-posix.h | 5 +
>> qemu-thread-win32.c | 35 ++
>> qemu-thread-win32.h | 4 +
>> qemu-thread.h | 7 +
>> thread-pool.c | 279 ++++++++++++++
>> thread-pool.h | 34 ++
>> trace-events | 5 +
>> 25 file modificati, 1323 inserzioni(+), 978 rimozioni(-)
>> rename aio.c => aio-posix.c (92%)
>> create mode 100644 aio-win32.c
>> rename block/{raw-posix-aio.h => raw-aio.h} (62%)
>> create mode 100644 event_notifier-posix.c
>> create mode 100644 event_notifier-win32.c
>> delete mode 100644 event_notifier.c
>> delete mode 100644 posix-aio-compat.c
>> create mode 100644 thread-pool.c
>> create mode 100644 thread-pool.h
>
> Ping, is there a v3?
No, but I rebased it on top of AioContext in my branch. If you're
interested I can resubmit it.
Paolo