Groups > comp.programming.threads > #1511

Re: Thread scaling in Windows

Newsgroups	comp.programming.threads
Subject	Re: Thread scaling in Windows
From	Paavo Helde <myfirstname@osa.pri.ee>
References	<XnsA1CFD0BECDBADmyfirstnameosapriee@216.196.109.131> <51a7c499$0$6565$9b4e6d93@newsspool4.arcor-online.net> <XnsA1D1132254871myfirstnameosapriee@216.196.109.131> <4fegq89mvs3l3k3apo1onv40ls0t6av4vh@4ax.com>
Organization	PKI
Message-ID	<XnsA1D2CE07A916Bmyfirstnameosapriee@216.196.109.131> (permalink)
Date	2013-06-01 12:15 -0500

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Robert Wessel <robertwessel2@yahoo.com> wrote in
news:4fegq89mvs3l3k3apo1onv40ls0t6av4vh@4ax.com: 

> 
> Memory management can be an area of quite high lock contention,
> particularly in C++ code with many "new"s being executed.  Plugging
> something like SmartHeap into your application is a simple fix if
> that's a problem.

I'm suspecting more and more that the memory allocator might be the culprit 
indeed. The screenshot of task managers at the SmartHeap home page exactly 
matches our experience. And we have lots and lots of small memory 
allocations.
 
> I'm not sure what boost::mutex is doing internally these days, but I
> think they're doing their own lock-free structure plus a Windows event
> object.  If they're not sharing that event object between mutexes, and
> you're creating these mutex objects at a rapid rate, you could have
> quite high overhead from the creating of the event objects.

From what I gather from the Boost code they are creating event objects only 
in case of contention (a lock does not succeed). Anyway, our objects which 
are thread-shared are typically long-living so it shouldn't matter.

Cheers
Paavo

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Thread

Thread scaling in Windows Paavo Helde <myfirstname@osa.pri.ee> - 2013-05-29 12:31 -0500
  Re: Thread scaling in Windows Robert Miles <robertmilesxyz@gmail.com> - 2013-05-29 17:26 -0700
    Re: Thread scaling in Windows Paavo Helde <myfirstname@osa.pri.ee> - 2013-05-30 16:11 -0500
      Re: Thread scaling in Windows Gerald Breuer <Gerald.Breuer@googlemail.com> - 2013-05-31 03:44 +0200
        Re: Thread scaling in Windows Paavo Helde <myfirstname@osa.pri.ee> - 2013-05-31 00:29 -0500
  Re: Thread scaling in Windows Marcel Müller <news.5.maazl@spamgourmet.org> - 2013-05-30 23:28 +0200
    Re: Thread scaling in Windows Paavo Helde <myfirstname@osa.pri.ee> - 2013-05-30 17:52 -0500
      Re: Thread scaling in Windows Melzzzzz <mel@zzzzz.com> - 2013-05-31 04:18 +0200
      Re: Thread scaling in Windows Robert Wessel <robertwessel2@yahoo.com> - 2013-05-31 01:11 -0500
        Re: Thread scaling in Windows Paavo Helde <myfirstname@osa.pri.ee> - 2013-06-01 12:15 -0500
          Re: Thread scaling in Windows Paavo Helde <myfirstname@osa.pri.ee> - 2013-06-01 16:52 -0500
            Re: Thread scaling in Windows [SOLVED] Paavo Helde <myfirstname@osa.pri.ee> - 2013-06-03 12:00 -0500
              Re: Thread scaling in Windows [SOLVED] Casper H.S. Dik <Casper.Dik@OrSPaMcle.COM> - 2013-06-04 08:16 +0000
              Re: Thread scaling in Windows [SOLVED] Noob <root@127.0.0.1> - 2013-06-04 10:25 +0200
      Re: Thread scaling in Windows Marcel Müller <news.5.maazl@spamgourmet.org> - 2013-05-31 15:53 +0200
        Re: Thread scaling in Windows Paavo Helde <myfirstname@osa.pri.ee> - 2013-05-31 12:57 -0500
          Re: Thread scaling in Windows Marcel Müller <news.5.maazl@spamgourmet.org> - 2013-05-31 22:59 +0200
            Re: Thread scaling in Windows Paavo Helde <myfirstname@osa.pri.ee> - 2013-06-01 03:06 -0500
              Re: Thread scaling in Windows Marcel Müller <news.5.maazl@spamgourmet.org> - 2013-06-01 15:20 +0200
                Re: Thread scaling in Windows Drazen Kacar <dave@fly.srk.fer.hr> - 2013-06-02 06:35 +0000
            Re: Thread scaling in Windows Casper H.S. Dik <Casper.Dik@OrSPaMcle.COM> - 2013-06-01 12:34 +0000
              Re: Thread scaling in Windows Marcel Müller <news.5.maazl@spamgourmet.org> - 2013-06-01 15:09 +0200
                Re: Thread scaling in Windows Casper H.S. Dik <Casper.Dik@OrSPaMcle.COM> - 2013-06-01 17:12 +0000

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