From: Paolo Bonzini <pbonzini@redhat.com>
To: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru>, qemu-devel@nongnu.org
Cc: peter.maydell@linaro.org, peter.crosthwaite@xilinx.com,
alex.bennee@linaro.org, mark.burton@greensocs.com,
real@ispras.ru, batuzovk@ispras.ru,
maria.klimushenkova@ispras.ru, afaerber@suse.de,
fred.konrad@greensocs.com
Subject: Re: [Qemu-devel] [RFC PATCH v10 18/24] replay: replay aio requests
Date: Fri, 13 Mar 2015 18:01:46 +0100 [thread overview]
Message-ID: <550317FA.6090301@redhat.com> (raw)
In-Reply-To: <20150227131131.11912.52470.stgit@PASHA-ISP>
On 27/02/2015 14:11, Pavel Dovgalyuk wrote:
> This patch adds identifier to aio requests. ID is used for creating bottom
> halves and identifying them while replaying.
> The patch also introduces several functions that make possible replaying
> of the aio requests.
Out of curiosity, why did you use this approach instead of using a
RR-specific block device backend (as you did for network, I think)? The
backend could just store the data that is read in the RR file (or in a
separate file that can be easily mmap-ed), and use a timer to trigger it
at the right QEMU_CLOCK_VIRTUAL tick.
I'm sure you considered something like this. Did you still get
non-determinism?
Paolo
next prev parent reply other threads:[~2015-03-13 17:02 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-27 13:09 [Qemu-devel] [RFC PATCH v10 00/24] Deterministic replay core Pavel Dovgalyuk
2015-02-27 13:09 ` [Qemu-devel] [RFC PATCH v10 01/24] i386: partial revert of interrupt poll fix Pavel Dovgalyuk
2015-02-27 13:09 ` [Qemu-devel] [RFC PATCH v10 02/24] replay: global variables and function stubs Pavel Dovgalyuk
2015-03-13 19:07 ` Eric Blake
2015-02-27 13:10 ` [Qemu-devel] [RFC PATCH v10 03/24] sysemu: system functions for replay Pavel Dovgalyuk
2015-02-27 13:10 ` [Qemu-devel] [RFC PATCH v10 04/24] replay: internal functions for replay log Pavel Dovgalyuk
2015-02-27 13:10 ` [Qemu-devel] [RFC PATCH v10 05/24] replay: introduce mutex to protect the " Pavel Dovgalyuk
2015-02-27 13:10 ` [Qemu-devel] [RFC PATCH v10 06/24] replay: introduce icount event Pavel Dovgalyuk
2015-02-27 13:10 ` [Qemu-devel] [RFC PATCH v10 07/24] cpu-exec: allow temporary disabling icount Pavel Dovgalyuk
2015-02-27 13:10 ` [Qemu-devel] [RFC PATCH v10 08/24] cpu: replay instructions sequence Pavel Dovgalyuk
2015-02-27 13:10 ` [Qemu-devel] [RFC PATCH v10 09/24] i386: interrupt poll processing Pavel Dovgalyuk
2015-02-27 13:10 ` [Qemu-devel] [RFC PATCH v10 10/24] replay: interrupts and exceptions Pavel Dovgalyuk
2015-02-27 13:10 ` [Qemu-devel] [RFC PATCH v10 11/24] replay: asynchronous events infrastructure Pavel Dovgalyuk
2015-02-27 13:10 ` [Qemu-devel] [RFC PATCH v10 12/24] replay: recording and replaying clock ticks Pavel Dovgalyuk
2015-02-27 13:11 ` [Qemu-devel] [RFC PATCH v10 13/24] timer: replace time() with QEMU_CLOCK_HOST Pavel Dovgalyuk
2015-02-27 13:11 ` [Qemu-devel] [RFC PATCH v10 14/24] replay: shutdown event Pavel Dovgalyuk
2015-02-27 13:11 ` [Qemu-devel] [RFC PATCH v10 15/24] replay: checkpoints Pavel Dovgalyuk
2015-02-27 13:11 ` [Qemu-devel] [RFC PATCH v10 16/24] aio: replace stack of bottom halves with queue Pavel Dovgalyuk
2015-02-27 13:11 ` [Qemu-devel] [RFC PATCH v10 17/24] replay: bottom halves Pavel Dovgalyuk
2015-02-27 13:11 ` [Qemu-devel] [RFC PATCH v10 18/24] replay: replay aio requests Pavel Dovgalyuk
2015-03-13 17:01 ` Paolo Bonzini [this message]
2015-03-16 10:40 ` Pavel Dovgaluk
2015-02-27 13:11 ` [Qemu-devel] [RFC PATCH v10 19/24] replay: thread pool Pavel Dovgalyuk
2015-02-27 13:11 ` [Qemu-devel] [RFC PATCH v10 20/24] typedef: add typedef for QemuOpts Pavel Dovgalyuk
2015-02-27 13:11 ` [Qemu-devel] [RFC PATCH v10 21/24] replay: initialization and deinitialization Pavel Dovgalyuk
2015-02-27 13:11 ` [Qemu-devel] [RFC PATCH v10 22/24] replay: replay blockers for devices Pavel Dovgalyuk
2015-02-27 13:12 ` [Qemu-devel] [RFC PATCH v10 23/24] replay: command line options Pavel Dovgalyuk
2015-02-27 13:12 ` [Qemu-devel] [RFC PATCH v10 24/24] replay: recording of the user input Pavel Dovgalyuk
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