Groups > comp.programming.threads > #1512

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> <XnsA1D2CE07A916Bmyfirstnameosapriee@216.196.109.131>
Organization	PKI
Message-ID	<XnsA1D38FAF84B9myfirstnameosapriee@216.196.109.131> (permalink)
Date	2013-06-01 16:52 -0500

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Paavo Helde <myfirstname@osa.pri.ee> wrote in
news:XnsA1D2CE07A916Bmyfirstnameosapriee@216.196.109.131: 

> 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.

Downloaded the first google hit for "scalable memory allocator" (Hoard) 
and it made a huge impact to the performance. Unfortunately the impact 
was negative, the results were much worse than before (instead of maximum 
speedup of 4.5 times around 10 worker threads, there is now max speedup 
of 3 times around 6 worker threads, then the performance goes downhill 
rapidly and 24 and 30 threads have almost the same total performance than 
the one-threaded run (with the default allocator the 24-30 thread runs 
produced ca 3x speedup).

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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