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Re: Encouraging the kernel(?) to more efficiently wake my threads

From: Chris Stankevitz <chrisstankevitz at gmail dot com>
To: libc-help at sourceware dot org
Date: Wed, 9 Nov 2011 13:53:47 -0800
Subject: Re: Encouraging the kernel(?) to more efficiently wake my threads
References: <CAPi0pstN1DdA_vpOti++4VWQ-xe9uConj7Ez+KwxMKNP9gigpA@mail.gmail.com>

On Sun, Nov 6, 2011 at 1:56 PM, Chris Stankevitz
<chrisstankevitz@gmail.com> wrote:
> In picture form:
> ?http://img7.imageshack.us/img7/5435/threadsi.png

I'm getting closer to figuring this out.  The amount of concurrency
linux offers me varies with the duration of the 'baby thread' task.
Ideally I'd like to see the concurrency level the same as my cpu count
(4).  I get this ideal situation only if my baby thread task duration
is ~100ms or more.

Baby task duration / concurrency
1ms / 2
10ms / 3
100ms or more / 4

Chris

Follow-Ups:
- Re: Encouraging the kernel(?) to more efficiently wake my threads
  - From: Chris Stankevitz

References:
- Encouraging the kernel(?) to more efficiently wake my threads
  - From: Chris Stankevitz

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