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@xxxxxxxxxxxxx> Sent: Wednesday, March 25, 2020 11:46 AM To: Yubo Xie <ltykernel@xxxxxxxxx>; KY Srinivasan <kys@xxxxxxxxxxxxx>; Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>; Stephen Hemminger <sthemmin@xxxxxxxxxxxxx>; Wei Liu <liuwe@xxxxxxxxxxxxx>; daniel.lezcano@xxxxxxxxxx; tglx@xxxxxxxxxxxxx; Michael Kelley <mikelley@xxxxxxxxxxxxx> Cc: Yubo Xie <yuboxie@xxxxxxxxxxxxx>; linux-hyperv@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; vkuznets <vkuznets@xxxxxxxxxx>; stable@xxxxxxxxxxxxxxx; Tianyu Lan <Tianyu.Lan@xxxxxxxxxxxxx> Subject: RE: [PATCH] x86/Hyper-V: Fix hv sched clock function return wrong time unit > From: linux-hyperv-owner@xxxxxxxxxxxxxxx > <linux-hyperv-owner@xxxxxxxxxxxxxxx> 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