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From: Josip Almasi <joe@vrspace.org>
Newsgroups: comp.lang.java.programmer
Subject: Re: thread pool with CachedThreadPool
Date: Thu, 17 Apr 2014 12:12:14 +0200
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Xref: csiph.com comp.lang.java.programmer:28117

On 04/17/2014 07:11 AM, Kevin McMurtrie wrote:
> In article <br7nfqFbmbrU1@mid.individual.net>,
>   Robert Klemme <shortcutter@googlemail.com> wrote:
>
>> On 16.04.2014 12:42, Josip Almasi wrote:
>>>
>>> Blocked thread itself spends no cpu time.
>>> Running thread may spend some more cpu time though, for lock checks.
>>> Real issue is flushing pipeline to ensure cache coherency among all cpu
>>> cores.
>>> So, more 'synchronized' statements your single running thread
>>> encounters, more cpu stalls. It's not really 'taking' cpu time, it's
>>> wasting it.
>>
>> I don't think this applies.  We were talking about threads idling in the
>> pool.

[snip]

Probably so.
But, see, it's not just 'small ammount of kernel time', issues go all 
the way to cpu design.

> Sun's thread pools are garbage

[snip]

Dang.
Thanks Kevin, you possibly saved me a lot of time.

Regards...