TIME="%Uuser %Ssystem %Eelapsed %PCPU (%Xtext+%Ddata %Mmax)k %Iinputs+%Ooutputs (%Fmajor+%Rminor)pagefaults %Wswaps" time ls
On 05/02/2012 10:08 PM, Alfred Zhong wrote:
Thank you all so much! On Wed, May 2, 2012 at 5:47 AM, Colin Ian King <colin.k...@canonical.com <mailto:colin.k...@canonical.com>> wrote: On 01/05/12 02:53, Alfred Zhong wrote: Dear Ubuntu Developers, especially Kernel Hackers, This may be a stupid question, please excuse my ignorance. I am doing a project on Linux scheduler that trying to minimize number of page faults. I finished the algorithm implementation and I need to measure the effect. I am wondering if Linux provides tools to record number of page fault happened during the whole execution process? Basically, I want something like $ pfstat ./a.out page faults: 3 Execution Time: 1003 ms Is there such a tool? I want to make sure before deciding to write one by myself, which will be a lot of work... Thanks a lot! Alfred There are well defined APIs for collecting this kind of data, for example you can collect the rusage info for an exiting child process using wait3() or wait4(). References: man 2 wait3 man 2 rusage
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