[LTP] [PATCH v2 2/2] Skip oversleep checks in timer tests under VM

[Li Wang]

On Wed, Apr 29, 2020 at 2:55 PM Jan Stancek <jstancek@redhat.com> wrote:

>
>
> ----- Original Message -----
> > Timer tests often fail on sleep overrun when LTP is running inside a VM.
> > The main cause is usually that the VM doesn't get enough CPU time to
> wake up
> > the test process in time. Disable oversleep tests if tst_is_virt()
> detects
> > any hypervisor.
>
> > BTW, systemd-detect-virt can't detect the PowerPC LPAR hypervisor.
>
> Same with virt-what. We could (in separate patch) add check for
> 'pseries_platform' (powerpc-utils) output:
>

+1 that makes sense to me.


>
> # pseries_platform
> PowerVM pSeries LPAR
>
> # pseries_platform
> PowerNV Host
>
> # pseries_platform
> Power KVM pSeries Guest
>
> >
> > +     /*
> > +      * Running tests in VM may cause timing issues, disable upper bound
> > +      * checks if LTP_VM_ENV is set to non-zero.
> > +      */
> > +     virt_env = tst_is_virt(VIRT_ANY);
>
> The comment still mentions LTP_VM_ENV. Other than that, I don't have major
> objections. Maybe somebody would like to run strict checks on VMs too, but
> that's something we could add later with an env. variable.
>
>
> --
> Mailing list info: https://lists.linux.it/listinfo/ltp
>
>

-- 
Regards,
Li Wang
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