Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > comp.programming.threads > #215
| Path | csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!gegeweb.org!de-l.enfer-du-nord.net!feeder2.enfer-du-nord.net!feeder.erje.net!news-2.dfn.de!news.dfn.de!news.uni-stuttgart.de!news.nask.pl!news.nask.org.pl!newsfeed2.atman.pl!newsfeed.atman.pl!.POSTED!not-for-mail |
|---|---|
| From | Edek <edek.pienkowski@gmail.com> |
| Newsgroups | comp.programming.threads |
| Subject | Re: False sharing |
| Date | Tue, 31 May 2011 21:18:13 +0200 |
| Organization | ATMAN - ATM S.A. |
| Lines | 17 |
| Message-ID | <is3etk$pgf$1@node2.news.atman.pl> (permalink) |
| References | <18fa2208-ba1c-42c5-bf1f-280e6cbc41e6@bl1g2000vbb.googlegroups.com> <is0un2$anb$1@node2.news.atman.pl> <eb6d6a69-ef08-4ebc-89dc-403886c3587f@24g2000yqk.googlegroups.com> <is3cgd$mnm$1@node2.news.atman.pl> |
| NNTP-Posting-Host | 81.219.115.2 |
| Mime-Version | 1.0 |
| Content-Type | text/plain; charset=ISO-8859-1; format=flowed |
| Content-Transfer-Encoding | 7bit |
| X-Trace | node2.news.atman.pl 1306869492 26127 81.219.115.2 (31 May 2011 19:18:12 GMT) |
| X-Complaints-To | usenet@atman.pl |
| NNTP-Posting-Date | Tue, 31 May 2011 19:18:12 +0000 (UTC) |
| User-Agent | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.17) Gecko/20110428 Linux/3.1.0-15 Thunderbird/3.1.0 |
| In-Reply-To | <is3cgd$mnm$1@node2.news.atman.pl> |
| Xref | x330-a1.tempe.blueboxinc.net comp.programming.threads:215 |
Show key headers only | View raw
I made one more test, of (work += i). This time with a single thread (it can be argued there is no false-sharing with a single thread ;) ). Two threads: real 0m3.449s user 0m3.274s sys 0m0.015s One thread: real 0m3.465s user 0m6.318s sys 0m0.037s Of course, the loop count is 10x smaller than yours. Edek
Back to comp.programming.threads | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
False sharing curious <curious.oskar58@gmail.com> - 2011-05-30 04:26 -0700
Re: False sharing Edek <edek.pienkowski@gmail.com> - 2011-05-30 22:29 +0200
Re: False sharing curious <curious.oskar58@gmail.com> - 2011-05-31 03:21 -0700
Re: False sharing Marcel Müller <news.5.maazl@spamgourmet.com> - 2011-05-31 15:41 +0200
Re: False sharing curious <curious.oskar58@gmail.com> - 2011-05-31 10:18 -0700
Re: False sharing Edek <edek.pienkowski@gmail.com> - 2011-05-31 20:10 +0200
Re: False sharing Edek <edek.pienkowski@gmail.com> - 2011-05-31 20:37 +0200
Re: False sharing Edek <edek.pienkowski@gmail.com> - 2011-05-31 21:18 +0200
Re: False sharing curious <curious.oskar58@gmail.com> - 2011-05-31 14:40 -0700
Re: False sharing "Balog Pal" <pasa@lib.hu> - 2011-06-01 03:17 +0200
Re: False sharing Edek <edek.pienkowski@gmail.com> - 2011-06-01 22:20 +0200
Re: False sharing curious <curious.oskar58@gmail.com> - 2011-05-31 14:29 -0700
Re: False sharing David Schwartz <davids@webmaster.com> - 2011-05-31 14:12 -0700
Re: False sharing "Chris M. Thomasson" <cristom@charter.net> - 2011-06-11 15:34 -0700
Re: False sharing "Chris M. Thomasson" <cristom@charter.net> - 2011-06-11 19:56 -0700
Re: False sharing "Chris M. Thomasson" <cristom@charter.net> - 2011-06-11 21:07 -0700
csiph-web