Re: Efficient x86 and x86_64 NOP microbenchmarks

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From: Andi Kleen
Date: Friday, August 15, 2008 - 2:51 pm

> > The other advantage is that it would allow getting rid of

Ok. But it's a serious one.  It gives slightly more gain as your whole 
complicated patching exercise.

Ok maybe it would be better to just properly fix gcc, but the problem
is it takes forever for the user base to actually start using a new
gcc :/

-Andi
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Messages in current thread:
[PATCH 0/5] ftrace: to kill a daemon, Steven Rostedt, (Thu Aug 7, 11:20 am)
Re: [PATCH 0/5] ftrace: to kill a daemon, Mathieu Desnoyers, (Thu Aug 7, 11:47 am)
Re: [PATCH 0/5] ftrace: to kill a daemon, Steven Rostedt, (Thu Aug 7, 1:42 pm)
Re: [PATCH 0/5] ftrace: to kill a daemon, Jeremy Fitzhardinge, (Thu Aug 7, 2:11 pm)
Re: [PATCH 0/5] ftrace: to kill a daemon, Steven Rostedt, (Thu Aug 7, 2:29 pm)
Re: [PATCH 0/5] ftrace: to kill a daemon, Roland McGrath, (Thu Aug 7, 3:26 pm)
Re: [PATCH 0/5] ftrace: to kill a daemon, Steven Rostedt, (Thu Aug 7, 6:21 pm)
Re: [PATCH 0/5] ftrace: to kill a daemon, Steven Rostedt, (Thu Aug 7, 6:24 pm)
Re: [PATCH 0/5] ftrace: to kill a daemon, Steven Rostedt, (Thu Aug 7, 6:56 pm)
Re: [PATCH 0/5] ftrace: to kill a daemon, Sam Ravnborg, (Thu Aug 7, 9:54 pm)
Re: [PATCH 0/5] ftrace: to kill a daemon, Peter Zijlstra, (Fri Aug 8, 12:22 am)
Re: [PATCH 0/5] ftrace: to kill a daemon, Steven Rostedt, (Fri Aug 8, 4:31 am)
Re: [PATCH 0/5] ftrace: to kill a daemon, Mathieu Desnoyers, (Fri Aug 8, 10:22 am)
Re: [PATCH 0/5] ftrace: to kill a daemon, Steven Rostedt, (Fri Aug 8, 10:36 am)
Re: [PATCH 0/5] ftrace: to kill a daemon, Mathieu Desnoyers, (Fri Aug 8, 10:46 am)
Re: [PATCH 0/5] ftrace: to kill a daemon, Steven Rostedt, (Fri Aug 8, 11:13 am)
Re: [PATCH 0/5] ftrace: to kill a daemon, Peter Zijlstra, (Fri Aug 8, 11:15 am)
Re: [PATCH 0/5] ftrace: to kill a daemon, Mathieu Desnoyers, (Fri Aug 8, 11:21 am)
Re: [PATCH 0/5] ftrace: to kill a daemon, Steven Rostedt, (Fri Aug 8, 11:41 am)
Re: [PATCH 0/5] ftrace: to kill a daemon, Linus Torvalds, (Fri Aug 8, 12:04 pm)
Re: [PATCH 0/5] ftrace: to kill a daemon, Mathieu Desnoyers, (Fri Aug 8, 12:05 pm)
Re: [PATCH 0/5] ftrace: to kill a daemon, Jeremy Fitzhardinge, (Fri Aug 8, 12:08 pm)
Re: [PATCH 0/5] ftrace: to kill a daemon, Steven Rostedt, (Fri Aug 8, 4:38 pm)
Re: [PATCH 0/5] ftrace: to kill a daemon, Andi Kleen, (Fri Aug 8, 5:23 pm)
Re: [PATCH 0/5] ftrace: to kill a daemon, Steven Rostedt, (Fri Aug 8, 5:30 pm)
Re: [PATCH 0/5] ftrace: to kill a daemon, Steven Rostedt, (Fri Aug 8, 5:36 pm)
Re: [PATCH 0/5] ftrace: to kill a daemon, Jeremy Fitzhardinge, (Fri Aug 8, 5:47 pm)
Re: [PATCH 0/5] ftrace: to kill a daemon, Linus Torvalds, (Fri Aug 8, 5:51 pm)
Re: [PATCH 0/5] ftrace: to kill a daemon, Steven Rostedt, (Fri Aug 8, 5:51 pm)
Re: [PATCH 0/5] ftrace: to kill a daemon, Roland McGrath, (Fri Aug 8, 5:53 pm)
Re: [PATCH 0/5] ftrace: to kill a daemon, Andi Kleen, (Fri Aug 8, 6:13 pm)
Re: [PATCH 0/5] ftrace: to kill a daemon, Andi Kleen, (Fri Aug 8, 6:19 pm)
Re: [PATCH 0/5] ftrace: to kill a daemon, Steven Rostedt, (Fri Aug 8, 6:25 pm)
Re: [PATCH 0/5] ftrace: to kill a daemon, Steven Rostedt, (Fri Aug 8, 6:30 pm)
Re: [PATCH 0/5] ftrace: to kill a daemon, Andi Kleen, (Fri Aug 8, 6:55 pm)
Re: [PATCH 0/5] ftrace: to kill a daemon, Steven Rostedt, (Fri Aug 8, 7:03 pm)
Re: [PATCH 0/5] ftrace: to kill a daemon, Andi Kleen, (Fri Aug 8, 7:23 pm)
Re: [PATCH 0/5] ftrace: to kill a daemon, Steven Rostedt, (Fri Aug 8, 9:12 pm)
Re: [PATCH 0/5] ftrace: to kill a daemon, Abhishek Sagar, (Sat Aug 9, 2:48 am)
Re: [PATCH 0/5] ftrace: to kill a daemon, Steven Rostedt, (Sat Aug 9, 6:01 am)
Re: [PATCH 0/5] ftrace: to kill a daemon, Abhishek Sagar, (Sat Aug 9, 8:01 am)
Re: [PATCH 0/5] ftrace: to kill a daemon, Steven Rostedt, (Sat Aug 9, 8:37 am)
Re: [PATCH 0/5] ftrace: to kill a daemon, Abhishek Sagar, (Sat Aug 9, 10:14 am)
Re: [PATCH 0/5] ftrace: to kill a daemon, Rusty Russell, (Sun Aug 10, 7:41 pm)
Re: [PATCH 0/5] ftrace: to kill a daemon, Steven Rostedt, (Mon Aug 11, 5:33 am)
Re: [PATCH 0/5] ftrace: to kill a daemon, Mathieu Desnoyers, (Mon Aug 11, 11:21 am)
Re: [PATCH 0/5] ftrace: to kill a daemon, Steven Rostedt, (Mon Aug 11, 12:28 pm)
Re: [PATCH 0/5] ftrace: to kill a daemon, Mathieu Desnoyers, (Tue Aug 12, 11:31 pm)
Re: [PATCH 0/5] ftrace: to kill a daemon, Mathieu Desnoyers, (Wed Aug 13, 8:38 am)
Efficient x86 and x86_64 NOP microbenchmarks, Mathieu Desnoyers, (Wed Aug 13, 10:52 am)
Re: Efficient x86 and x86_64 NOP microbenchmarks, Linus Torvalds, (Wed Aug 13, 11:27 am)
Re: Efficient x86 and x86_64 NOP microbenchmarks, Andi Kleen, (Wed Aug 13, 11:41 am)
Re: Efficient x86 and x86_64 NOP microbenchmarks, Avi Kivity, (Wed Aug 13, 11:45 am)
Re: Efficient x86 and x86_64 NOP microbenchmarks, Andi Kleen, (Wed Aug 13, 11:51 am)
Re: Efficient x86 and x86_64 NOP microbenchmarks, Avi Kivity, (Wed Aug 13, 11:56 am)
Re: Efficient x86 and x86_64 NOP microbenchmarks, Mathieu Desnoyers, (Wed Aug 13, 12:16 pm)
Re: Efficient x86 and x86_64 NOP microbenchmarks, Mathieu Desnoyers, (Wed Aug 13, 12:30 pm)
Re: Efficient x86 and x86_64 NOP microbenchmarks, Andi Kleen, (Wed Aug 13, 12:37 pm)
Re: Efficient x86 and x86_64 NOP microbenchmarks, Mathieu Desnoyers, (Wed Aug 13, 1:01 pm)
[RFC PATCH] x86 alternatives : fix LOCK_PREFIX race with p ..., Mathieu Desnoyers, (Wed Aug 13, 4:41 pm)
Re: [RFC PATCH] x86 alternatives : fix LOCK_PREFIX race wi ..., Mathieu Desnoyers, (Wed Aug 13, 6:13 pm)
Re: [RFC PATCH] x86 alternatives : fix LOCK_PREFIX race wi ..., Jeremy Fitzhardinge, (Wed Aug 13, 6:22 pm)
Re: [RFC PATCH] x86 alternatives : fix LOCK_PREFIX race wi ..., Mathieu Desnoyers, (Wed Aug 13, 6:49 pm)
Re: [RFC PATCH] x86 alternatives : fix LOCK_PREFIX race wi ..., Jeremy Fitzhardinge, (Wed Aug 13, 8:35 pm)
Re: [RFC PATCH] x86 alternatives : fix LOCK_PREFIX race wi ..., Mathieu Desnoyers, (Thu Aug 14, 8:18 am)
Re: [RFC PATCH] x86 alternatives : fix LOCK_PREFIX race wi ..., Mathieu Desnoyers, (Thu Aug 14, 9:58 am)
Re: [RFC PATCH] x86 alternatives : fix LOCK_PREFIX race wi ..., Jeremy Fitzhardinge, (Thu Aug 14, 10:04 am)
Re: [RFC PATCH] x86 alternatives : fix LOCK_PREFIX race wi ..., Jeremy Fitzhardinge, (Thu Aug 14, 10:05 am)
Re: [RFC PATCH] x86 alternatives : fix LOCK_PREFIX race wi ..., Jeremy Fitzhardinge, (Thu Aug 14, 10:28 am)
Re: [RFC PATCH] x86 alternatives : fix LOCK_PREFIX race wi ..., Mathieu Desnoyers, (Thu Aug 14, 10:30 am)
Re: [RFC PATCH] x86 alternatives : fix LOCK_PREFIX race wi ..., Jeremy Fitzhardinge, (Thu Aug 14, 10:43 am)
Re: [RFC PATCH] x86 alternatives : fix LOCK_PREFIX race wi ..., Mathieu Desnoyers, (Thu Aug 14, 10:46 am)
Re: [RFC PATCH] x86 alternatives : fix LOCK_PREFIX race wi ..., Jeremy Fitzhardinge, (Thu Aug 14, 10:49 am)
Re: [RFC PATCH] x86 alternatives : fix LOCK_PREFIX race wi ..., Mathieu Desnoyers, (Thu Aug 14, 10:55 am)
Re: [RFC PATCH] x86 alternatives : fix LOCK_PREFIX race wi ..., Mathieu Desnoyers, (Thu Aug 14, 11:09 am)
Re: [RFC PATCH] x86 alternatives : fix LOCK_PREFIX race wi ..., Mathieu Desnoyers, (Thu Aug 14, 11:53 am)
Re: [RFC PATCH] x86 alternatives : fix LOCK_PREFIX race wi ..., Jeremy Fitzhardinge, (Thu Aug 14, 12:29 pm)
Re: [RFC PATCH] x86 alternatives : fix LOCK_PREFIX race wi ..., Mathieu Desnoyers, (Thu Aug 14, 12:49 pm)
Re: [RFC PATCH] x86 alternatives : fix LOCK_PREFIX race wi ..., Mathieu Desnoyers, (Thu Aug 14, 1:31 pm)
Re: [RFC PATCH] x86 alternatives : fix LOCK_PREFIX race wi ..., Jeremy Fitzhardinge, (Thu Aug 14, 2:46 pm)
Re: Efficient x86 and x86_64 NOP microbenchmarks, Steven Rostedt, (Fri Aug 15, 2:34 pm)
Re: Efficient x86 and x86_64 NOP microbenchmarks, Andi Kleen, (Fri Aug 15, 2:51 pm)