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Re: Implicit memory barriers on x86

From "Chris M. Thomasson" <cristom@charter.net>
Newsgroups comp.programming.threads
References <071a9804-ceb8-4276-bfe2-7796359170ec@16g2000yqy.googlegroups.com> <9c31e82b-efad-4737-800c-921f623384f5@l18g2000yql.googlegroups.com> <4DF343EC.DB0F8DD0@web.de>
Subject Re: Implicit memory barriers on x86
Message-ID <eerJp.51229$5f.1841@newsfe19.iad> (permalink)
Date 2011-06-13 09:51 -0700

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"Alexander Terekhov" <terekhov@web.de> wrote in message 
news:4DF343EC.DB0F8DD0@web.de...
>
> Rani Sharoni wrote:
> [...]
>> Now I need to re-figure why the non locked write works for spinlock
>> release...
>
> Because preceding reads and writes can not 'sink' below the write (be
> delayed past it). x86 writes have 'release' semantics.

FWIW, x86 stores that operate on write-back memory have `release' 
semantics...

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Thread

Implicit memory barriers on x86 Rani Sharoni <ranisharoni75@gmail.com> - 2011-06-07 13:47 -0700
  Re: Implicit memory barriers on x86 David Schwartz <davids@webmaster.com> - 2011-06-08 10:11 -0700
    Re: Implicit memory barriers on x86 Rani Sharoni <ranisharoni75@gmail.com> - 2011-06-08 12:53 -0700
  Re: Implicit memory barriers on x86 Edek <edek.pienkowski@gmail.com> - 2011-06-08 20:29 +0200
    Re: Implicit memory barriers on x86 Rani Sharoni <ranisharoni75@gmail.com> - 2011-06-08 12:48 -0700
      Re: Implicit memory barriers on x86 Edek <edek.pienkowski@gmail.com> - 2011-06-08 23:41 +0200
        Re: Implicit memory barriers on x86 Rani Sharoni <ranisharoni75@gmail.com> - 2011-06-08 22:19 -0700
        Re: Implicit memory barriers on x86 David Schwartz <davids@webmaster.com> - 2011-06-09 16:25 -0700
  Re: Implicit memory barriers on x86 Rani Sharoni <ranisharoni75@gmail.com> - 2011-06-10 14:19 -0700
    Re: Implicit memory barriers on x86 David Schwartz <davids@webmaster.com> - 2011-06-11 02:57 -0700
      Re: Implicit memory barriers on x86 Rani Sharoni <ranisharoni75@gmail.com> - 2011-06-11 09:21 -0700
        Re: Implicit memory barriers on x86 Edek <edek.pienkowski@gmail.com> - 2011-06-11 22:26 +0200
    Re: Implicit memory barriers on x86 Alexander Terekhov <terekhov@web.de> - 2011-06-11 12:31 +0200
      Re: Implicit memory barriers on x86 "Chris M. Thomasson" <cristom@charter.net> - 2011-06-13 09:51 -0700
    Re: Implicit memory barriers on x86 Rani Sharoni <ranisharoni75@gmail.com> - 2011-06-11 12:30 -0700
      Re: Implicit memory barriers on x86 Edek <edek.pienkowski@gmail.com> - 2011-06-11 22:18 +0200
        Re: Implicit memory barriers on x86 Rani Sharoni <ranisharoni75@gmail.com> - 2011-06-11 13:31 -0700

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