From: Yubo Xie <yuboxie@microsoft.com>
To: Dexuan Cui <decui@microsoft.com>, Yubo Xie <ltykernel@gmail.com>,
KY Srinivasan <kys@microsoft.com>,
Haiyang Zhang <haiyangz@microsoft.com>,
Stephen Hemminger <sthemmin@microsoft.com>,
Wei Liu <liuwe@microsoft.com>,
"daniel.lezcano@linaro.org" <daniel.lezcano@linaro.org>,
"tglx@linutronix.de" <tglx@linutronix.de>,
Michael Kelley <mikelley@microsoft.com>
Cc: "linux-hyperv@vger.kernel.org" <linux-hyperv@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
vkuznets <vkuznets@redhat.com>,
"stable@vger.kernel.org" <stable@vger.kernel.org>,
Tianyu Lan <Tianyu.Lan@microsoft.com>
Subject: RE: [PATCH] x86/Hyper-V: Fix hv sched clock function return wrong time unit
Date: Wed, 25 Mar 2020 18:57:14 +0000 [thread overview]
Message-ID: <DM5PR00MB0424FA0EC96382D3B6D2D269B4CE0@DM5PR00MB0424.namprd00.prod.outlook.com> (raw)
In-Reply-To: <HK0P153MB0273AEB3D64694E8DF31C0B0BFCE0@HK0P153MB0273.APCP153.PROD.OUTLOOK.COM>
I use "time" to run some performance tests in our project under WSL2, but the result looks weird: the value of "real" is far from the sum of "user" + "sys".
-----Original Message-----
From: Dexuan Cui <decui@microsoft.com>
Sent: Wednesday, March 25, 2020 11:46 AM
To: Yubo Xie <ltykernel@gmail.com>; KY Srinivasan <kys@microsoft.com>; Haiyang Zhang <haiyangz@microsoft.com>; Stephen Hemminger <sthemmin@microsoft.com>; Wei Liu <liuwe@microsoft.com>; daniel.lezcano@linaro.org; tglx@linutronix.de; Michael Kelley <mikelley@microsoft.com>
Cc: Yubo Xie <yuboxie@microsoft.com>; linux-hyperv@vger.kernel.org; linux-kernel@vger.kernel.org; vkuznets <vkuznets@redhat.com>; stable@vger.kernel.org; Tianyu Lan <Tianyu.Lan@microsoft.com>
Subject: RE: [PATCH] x86/Hyper-V: Fix hv sched clock function return wrong time unit
> From: linux-hyperv-owner@vger.kernel.org
> <linux-hyperv-owner@vger.kernel.org> On Behalf Of Yubo Xie
> Sent: Tuesday, March 24, 2020 8:20 AM
> ...
> sched clock callback should return time with nano second as unit but
> current hv callback returns time with 100ns. Fix it.
Hi Yubo,
I'm curious how you found the bug? :-) Did you notice some kind of symtom?
Thanks,
-- Dexuan
prev parent reply other threads:[~2020-03-25 18:57 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-24 15:19 [PATCH] x86/Hyper-V: Fix hv sched clock function return wrong time unit Yubo Xie
2020-03-24 15:49 ` Vitaly Kuznetsov
2020-03-25 13:57 ` Tianyu Lan
2020-03-25 14:28 ` Vitaly Kuznetsov
2020-03-25 1:02 ` Sasha Levin
2020-03-25 18:46 ` Dexuan Cui
2020-03-25 18:57 ` Yubo Xie [this message]
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