[concurrency-interest] Some interesting (confusing?) benchmark results

Holger Hoffstätte holger.hoffstaette at googlemail.com
Wed Feb 13 09:37:53 EST 2013


On 13.02.2013 15:21, √iktor Ҡlang wrote:
> What's even more interesting is the the available processors can change
> at runtime, making it extremely hard to do anything interesting with the
> info.

Well..see towards the end of [1]. However this approach is obviously
useless for Java, so you'd have to do something internal, like register
inotify callbacks on the /sys list or the like. Unfortunately that
doesn't work either [2]. Things go downhill from there.
All statically wired thread pools (hi FJ) also suffer from this.

..but we're getting off-topic :)

-h

[1] http://www.kernel.org/doc/Documentation/cpu-hotplug.txt
[2] http://www.mail-archive.com/kernelnewbies@nl.linux.org/msg07651.html



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