From: Fengguang Wu <fengguang.wu@intel.com>
To: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
LKML <linux-kernel@vger.kernel.org>,
lkp@01.org
Subject: Re: [ACPI / hotplug / PCI] 1b360f44d00: -80.9% vm-scalability.stddev
Date: Wed, 5 Mar 2014 20:49:13 +0800 [thread overview]
Message-ID: <20140305124913.GA9649@localhost> (raw)
In-Reply-To: <1530281.asBBpMI1MW@vostro.rjw.lan>
On Wed, Mar 05, 2014 at 01:58:54PM +0100, Rafael J. Wysocki wrote:
> On Wednesday, March 05, 2014 04:23:36 PM Fengguang Wu wrote:
> > Hi Rafael,
>
> Hi,
>
> > I don't know why but we are glad to find the below changes on commit
>
> Do I understand correcty that you mean you're seeing improvement?
Yes - the random multi-thread malloc test's deviation is reduced noticeably.
> Either way, if the test below doesn't involve hotplug or device removal via
> sysfs, I have no explanation ...
OK.
Thanks,
Fengguang
> > 1b360f44d009059e446532f29c1a889951e72667 ("ACPI / hotplug / PCI: Fix bridge removal race in handle_hotplug_event()")
> >
> > test case: brickland2/micro/vm-scalability/300s-anon-r-rand-mt
> >
> > d42f5da23400833 1b360f44d009059e446532f29
> > --------------- -------------------------
> > 3.54 ~164% -80.9% 0.68 ~37% TOTAL vm-scalability.stddev
> > 14177 ~ 7% -22.1% 11040 ~ 7% TOTAL numa-meminfo.node0.SReclaimable
> > 3543 ~ 7% -22.1% 2759 ~ 7% TOTAL numa-vmstat.node0.nr_slab_reclaimable
> > 776196 ~ 6% -10.0% 698893 ~ 5% TOTAL numa-numastat.node2.local_node
> > 776196 ~ 6% -10.0% 698894 ~ 5% TOTAL numa-numastat.node2.numa_hit
> >
> > The ~XX% numbers are stddev percent.
> > The [+-]XX% is change percent.
> >
> > The below graph shows all samples collected during the bisect
> >
> > [*] bisect-good
> > [O] bisect-bad ("bad" in the sense of bisect)
> >
> > In which you can see the stableness of the change and bisect.
> >
> > vm-scalability.stddev
> >
> > 16 ++--------------------------------------------------------------------+
> > | * |
> > 14 ++ : |
> > 12 ++ : |
> > | :: |
> > 10 ++ :: |
> > | :: |
> > 8 ++ :: |
> > | : : |
> > 6 ++ * : : |
> > 4 ++ * * :: : : |
> > | +: : + * : : : : |
> > 2 ++*. *. .* : : * .*. + : : : .* : : |
> > |+ * + * *. .* O *.*.*. .** O.**.O.* O: *.O.* O OO.* + : *.|
> > 0 O+O-OO-O-O-O-OO-O-O---OO-O-O-O-OO-O---OO-*-O---OO-*-O------O-O-*-*----*
> >
> >
> > Thanks,
> > Fengguang
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> > the body of a message to majordomo@vger.kernel.org
> > More majordomo info at http://vger.kernel.org/majordomo-info.html
> > Please read the FAQ at http://www.tux.org/lkml/
>
> --
> I speak only for myself.
> Rafael J. Wysocki, Intel Open Source Technology Center.
prev parent reply other threads:[~2014-03-05 12:49 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-05 8:23 [ACPI / hotplug / PCI] 1b360f44d00: -80.9% vm-scalability.stddev Fengguang Wu
2014-03-05 12:58 ` Rafael J. Wysocki
2014-03-05 12:49 ` Fengguang Wu [this message]
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