From: "Benoît Canet" <benoit.canet@nodalink.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: peter.maydell@linaro.org, qemu-devel@nongnu.org,
"Benoît Canet" <benoit.canet@nodalink.com>
Subject: Re: [Qemu-devel] [PATCH v2 3/3] util: Add an utility infrastructure used to compute an average on a time slice
Date: Wed, 24 Sep 2014 13:26:35 +0000 [thread overview]
Message-ID: <20140924132635.GA18369@nodalink.com> (raw)
In-Reply-To: <540DBD46.7030207@redhat.com>
On Mon, Sep 08, 2014 at 04:29:26PM +0200, Paolo Bonzini wrote:
> Il 08/09/2014 14:18, Benoît Canet ha scritto:
> > The algorithm used was defined on the list while discussing the new IO accounting
> > overhaul.
> > See http://lists.nongnu.org/archive/html/qemu-devel/2014-08/msg04954.html
> >
> > Also the module takes care of computing minimal and maximal values over the time
> > slice duration.
> >
> > Signed-off-by: Benoît Canet <benoit.canet@nodalink.com>
>
> If you add
>
> int64_t cpu_get_clock(void)
> {
> return my_clock_value;
> }
>
> to the test, and use a QEMU_CLOCK_VIRTUAL-based average, you should be
> able to advance the clock directly in the test with no need for sleep()
> and with 100% deterministic results.
That's a really neat trick. Thanks
next prev parent reply other threads:[~2014-09-24 13:26 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-08 12:18 [Qemu-devel] [PATCH v2 0/3] Add the infrastructure that will be used to compute I/O accouting averages Benoît Canet
2014-09-08 12:18 ` [Qemu-devel] [PATCH v2 1/3] throttle: Make NANOSECONDS_PER_SECOND an integer Benoît Canet
2014-09-08 14:46 ` Eric Blake
2014-09-15 10:01 ` Markus Armbruster
2014-09-08 12:18 ` [Qemu-devel] [PATCH v2 2/3] timers: Move NANOSECONDS_PER_SECONDS to timer.h for future reuse Benoît Canet
2014-09-08 14:56 ` Eric Blake
2014-09-08 12:18 ` [Qemu-devel] [PATCH v2 3/3] util: Add an utility infrastructure used to compute an average on a time slice Benoît Canet
2014-09-08 14:29 ` Paolo Bonzini
2014-09-08 14:49 ` Benoît Canet
2014-09-08 15:09 ` Paolo Bonzini
2014-09-08 15:25 ` Benoît Canet
2014-09-15 11:13 ` Markus Armbruster
2014-09-15 11:41 ` Benoît Canet
2014-09-15 11:44 ` Benoît Canet
2014-09-24 13:26 ` Benoît Canet [this message]
2014-09-15 10:23 ` Markus Armbruster
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