linux-kernel - Re: [RFC PATCH v1 2/2] proc: add /proc/<pid>/thread

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Message-ID: <d8a68174-70b0-8c6c-3293-b4ebb717d39e@linux.intel.com>
Date:   Mon, 12 Nov 2018 06:21:17 -0800
From:   Arjan van de Ven <arjan@...ux.intel.com>
To:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>
Cc:     Aubrey Li <aubrey.li@...el.com>, tglx@...utronix.de,
        mingo@...hat.com, hpa@...or.com, ak@...ux.intel.com,
        tim.c.chen@...ux.intel.com, linux-kernel@...r.kernel.org,
        Aubrey Li <aubrey.li@...ux.intel.com>
Subject: Re: [RFC PATCH v1 2/2] proc: add /proc/<pid>/thread_state


>> I'd prefer the kernel to do such clustering...
> 
> I think that is a next step.
> 
> Also, while the kernel can do this at a best effort basis, it cannot
> take into account things the kernel doesn't know about, like high
> priority job peak load etc.., things a job scheduler would know.
> 
> Then again, a job scheduler would likely already know about the AVX
> state anyway.

the job scheduler can guess.
unless it can also *measure* it won't know for sure...

so even in that scenario having a decent way to report actuals is useful


>