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Re: [PATCH] calibrate_tsc(): use the Stall() EFI boot service on GRUB_MA
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From: |
Andrei Borzenkov |
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Subject: |
Re: [PATCH] calibrate_tsc(): use the Stall() EFI boot service on GRUB_MACHINE_EFI |
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Date: |
Mon, 30 Nov 2015 19:50:02 +0300 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 |
30.11.2015 19:31, Vitaly Kuznetsov пишет:
> Andrei Borzenkov <address@hidden> writes:
>
>> 26.11.2014 11:59, Laszlo Ersek пишет:
>>> HyperV Gen2 virtual machines have no PIT; guest code should rely on UEFI
>>> services instead.
>>>
>>
>> Could you retest with current master? It now supports multiple methods
>> to calibrate TSC and should avoid PIT on UEFI systems.
>
> Unfortunately, current master (grub-2.02-beta2-561-g346a494) still
> doesn't work for me, timer keeps running like crazy on Gen2 Hyper-V VMs.
>
@Michael: I remember you tested version of Vladimir patch on Hyper-V?
Could you test current master?