linux-kernel - Re: [PATCH] powerpc/vdso32: Add support for CLOCK_{REALTIME/MONOTONIC}

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Date:   Mon, 19 Aug 2019 17:34:11 -0500
From:   Nathan Lynch <nathanl@...ux.ibm.com>
To:     Christophe Leroy <christophe.leroy@....fr>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     "Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>,
        linuxppc-dev@...ts.ozlabs.org,
        Santosh Sivaraj <santosh@...six.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] powerpc/vdso32: Add support for CLOCK_{REALTIME/MONOTONIC}_COARSE

Christophe Leroy <christophe.leroy@....fr> writes:

> Hi,
>
> Le 19/08/2019 à 18:37, Nathan Lynch a écrit :
>> Hi,
>> 
>> Christophe Leroy <christophe.leroy@....fr> writes:
>>> Benchmark from vdsotest:
>> 
>> I assume you also ran the verification/correctness parts of vdsotest...? :-)
>> 
>
> I did run vdsotest-all. I guess it runs the verifications too ?

It does, but at a quick glance it runs the validation for "only" 1
second per API. It may provide more confidence to allow the validation
to run across several second (tv_sec) transitions, e.g.

vdsotest -d 30 clock-gettime-monotonic-coarse verify

Regardless, I did not see any problem with your patch.