Hi Marcelo, Marcelo Leal wrote: > Ok, but that is a bug, or should work like that? > We can not use dtrace on multiple processors systems? > Sorry, but i don't get it... > I don't consider this a bug. I think it depends on what you are trying to measure. The script you are using measures latency for read/write operations across all cpus. There is nothing wrong with the sum of the times being longer than the total time you are tracing, if there are multiple cpus. If you wanted to measure latency per cpu, the script would need to be changed.
So, what are you trying to measure? I think more interesting is to find out why some I/O operations take longer than others. For this, you can use speculative tracing. Trace all function entries and returns, but only commit if the time spent is longer than the longest time found thus far. I'm sure others have ideas about this... max > __ > Leal > [http://www.eall.com.br/blog] > _______________________________________________ dtrace-discuss mailing list dtrace-discuss@opensolaris.org
