Hi Marcelo, Marcelo Leal wrote: > I think (us) is microseconds. There is one division by "1000" on the source > code... > > Oops. You're right. I did not see that. (That might explain the 4-8 nanosecond I/Os, which I did think seemed pretty fast. They are actually 4-8 microsecond). So, you want to know how you can spend 19 or 20 minutes in a 10 minute trace? You have multiple cpu's, so each cpu can be working in parallel on different I/O requests. If you have 8 cpu's, the average time spent by each cpu would be about 2.5 minutes. This does sound a little high to me, but not extreme. If you got 80 minutes, I would be concerned that all cpus are working on requests all the time. It might be difficult to correlate per cpu, as I suspect the start and done probe for a given I/O could fire on different cpus.
max > Leal > [http://www.eall.com.br/blog] > _______________________________________________ dtrace-discuss mailing list [email protected]
