On Sun, 30 Oct 2011, sheng qiu wrote: > hi, > > is there any way to see how much time spend on each part of ceph when > running it. i just want to see which part of ceph codes spend more > time or have larger cost. > i tried to config ceph adding -pg, but when i use gprof command, it > said no gmon.out. > i also checked the ceph wiki, the profiling on cpu part do get an > output on time cost. but it does not show details on ceph (how much > time spend on each part).
I've used gprof in the past, but not recently. Two things to watch out for, IIRC: - The gmon.out is written out on shutdown in the current directory. do '--chdir .' on the command line, and make sure you somehow tell the daemon to stop in order to get some output. - You used to need to LD_PRELOAD gprof_helper.so in order to get results for all threads. There should be a copy of the source in test/ or scripts/, although there is no Makefile line. Google it for more info. sage > > Thanks, > Sheng > > -- > Sheng Qiu > Texas A & M University > Room 302 Wisenbaker > email: [email protected] > College Station, TX 77843-3259 > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > the body of a message to [email protected] > More majordomo info at http://vger.kernel.org/majordomo-info.html > > -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
