Re: Quad core CPUs loaded at only 50% when running a CPU and mmap intensive multi-threaded task | KernelTrap

Re: Quad core CPUs loaded at only 50% when running a CPU and mmap intensive multi-threaded task

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From: Andi Kleen

Subject: Re: Quad core CPUs loaded at only 50% when running a CPU and mmap intensive multi-threaded task

Date: Tuesday, August 26, 2008 - 1:12 am

Theodore Tso <tytso@mit.edu> writes:

As a general comment it still sounds there is a regression here?
If the workload was faster in an earlier kernel and is now slow
clearly something got slower? And that might be fixable. 
Perhaps something for Rafael's list?

quoted text> Maybe if I had used hugepages it would have been a win, 

hugepages do not support arbitary file backing.

-Andi

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Messages in current thread:

Re: Quad core CPUs loaded at only 50% when running a CPU a ..., Peter Zijlstra, (Sun Aug 24, 10:51 pm)

Re: Quad core CPUs loaded at only 50% when running a CPU a ..., edwin, (Mon Aug 25, 12:04 am)

Re: Quad core CPUs loaded at only 50% when running a CPU a ..., Peter Zijlstra, (Mon Aug 25, 2:23 am)

Re: Quad core CPUs loaded at only 50% when running a CPU a ..., Török Edwin, (Mon Aug 25, 2:49 am)

Re: Quad core CPUs loaded at only 50% when running a CPU a ..., Peter Zijlstra, (Mon Aug 25, 3:02 am)

Re: Quad core CPUs loaded at only 50% when running a CPU a ..., Török Edwin, (Mon Aug 25, 3:22 am)

Re: Quad core CPUs loaded at only 50% when running a CPU a ..., Peter Zijlstra, (Mon Aug 25, 3:36 am)

Re: Quad core CPUs loaded at only 50% when running a CPU a ..., Peter Zijlstra, (Mon Aug 25, 3:37 am)

Re: Quad core CPUs loaded at only 50% when running a CPU a ..., edwin, (Mon Aug 25, 4:00 am)

Re: Quad core CPUs loaded at only 50% when running a CPU a ..., edwin, (Mon Aug 25, 4:30 am)

Re: Quad core CPUs loaded at only 50% when running a CPU a ..., Peter Zijlstra, (Mon Aug 25, 4:41 am)

Re: Quad core CPUs loaded at only 50% when running a CPU a ..., Theodore Tso, (Mon Aug 25, 6:48 am)

Re: Quad core CPUs loaded at only 50% when running a CPU a ..., Andi Kleen, (Tue Aug 26, 1:12 am)

Re: Quad core CPUs loaded at only 50% when running a CPU a ..., Török Edwin, (Mon Sep 8, 12:10 pm)