Re: [perf-discuss] [dtrace-discuss] track program time - need some guidelines

2009-07-13 Thread Jim Mauro
I wanted to avoid any filesystem specifc behavior from the output. That will be very hard. You'd need a DTrace script that breaks-out the time spent in the different layers down the IO stack, and substract the time spent in the filesystem layers from the total. The problem remains the same

Re: [perf-discuss] [dtrace-discuss] track program time - need some guidelines

2009-07-13 Thread tester
Thanks Jim. > Threads are put to sleep when they issue blocking > system calls. > I'm not sure exactly what you mean by "only know > synchronous > app wait from an app perspective", but the > threads will be in the > sleep state (SLP) after issuing the read/write until > the data is > availabl