Groups > comp.programming.threads > #1516

Re: Thread scaling in Windows [SOLVED]

From	Noob <root@127.0.0.1>
Newsgroups	comp.programming.threads
Subject	Re: Thread scaling in Windows [SOLVED]
Date	2013-06-04 10:25 +0200
Organization	A noiseless patient Spider
Message-ID	<kok80o$au9$1@dont-email.me> (permalink)
References	(2 earlier) <XnsA1D1132254871myfirstnameosapriee@216.196.109.131> <4fegq89mvs3l3k3apo1onv40ls0t6av4vh@4ax.com> <XnsA1D2CE07A916Bmyfirstnameosapriee@216.196.109.131> <XnsA1D38FAF84B9myfirstnameosapriee@216.196.109.131> <XnsA1D4CB7C99154myfirstnameosapriee@216.196.109.131>

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Paavo Helde wrote:

> With the next memory allocator I tried (Intel TBB) the problem on Windows 
> appears to be mostly solved, now the program scales much more nicely and 
> gets about 8x speedup with 12 worker threads. After that it seems the 
> hyperthreading penalty kicks in so that the max speedup (with 24 threads) 
> is only 10.5 times (it has 12 physical cores (with HT, 24 logical 
> cores)).
> 
> The scaling is still worse than in Linux, but this is compensated by that 
> MSVC seems to be able to do better job in optimizations than gcc so that 
> the absolute test times are actually better in Windows than in Linux for 
> all tests up to 24 threads.

I've heard that Intel's icc produces faster binaries than gcc.
You could give icc a test run.

http://software.intel.com/en-us/non-commercial-software-development

Regards.

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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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