| From: |
| Linus Torvalds <torvalds-AT-linux-foundation.org> |
| To: |
| Mathieu Desnoyers <mathieu.desnoyers-AT-efficios.com> |
| Subject: |
| Re: [RFC PATCH] check_preempt_tick should not compare vruntime with
wall time |
| Date: |
| Mon, 13 Sep 2010 10:51:38 -0700 |
| Message-ID: |
| <AANLkTi=8m4g01wZPacySoF7U0PevTNVgJoZZrHiUD-pN@mail.gmail.com> |
| Cc: |
| Peter Zijlstra <peterz-AT-infradead.org>,
LKML <linux-kernel-AT-vger.kernel.org>,
Andrew Morton <akpm-AT-linux-foundation.org>,
Ingo Molnar <mingo-AT-elte.hu>,
Steven Rostedt <rostedt-AT-goodmis.org>,
Thomas Gleixner <tglx-AT-linutronix.de>,
Tony Lindgren <tony-AT-atomide.com>,
Mike Galbraith <efault-AT-gmx.de> |
| Archive‑link: | |
Article |
On Mon, Sep 13, 2010 at 10:45 AM, Mathieu Desnoyers
<mathieu.desnoyers@efficios.com> wrote:
>
> FWIW, Xorg and firefox feel _much more_ responsive with the fix I propose when
> running with a make -j10. The system is even usable with a make -j20 on my UP
> machine, even though I can start feeling a some lag. This is probably a more
> important, yet less scientific, result.
I'll test that myself (but in a bit - I need to go do voter
registration and socsec update first, though - I became a US citizen
last week).
Because yes, that's the reason I'm personally interested in your
scheduler latency work: I think our X behavior under load is pitiful
(I do "make -j16" on my dual-core with HT Core i5, and web browsong
shouldn't start to lag as much as it does just because I overcommit
the CPU a bit). So if this makes a noticeable difference, I think it's
very important.
Linus
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