Re: [perf-discuss] Scheduling latency

2008-05-21 Thread Brendan Gregg - Sun Microsystems
On Wed, May 21, 2008 at 08:11:30PM +0200, Zeljko Vrba wrote: > On Wed, May 21, 2008 at 07:24:50PM +0200, Henrik Johansson wrote: > > > > Total idle time reported by vmstat is about 60-80% and mpstat shows > > that no cpu(hwthread) is utilized to even near the 100%. I've also > > seen that the

Re: [perf-discuss] Network Monitoring

2008-05-21 Thread Brendan Gregg - Sun Microsystems
G'Day Rick, On Mon, May 05, 2008 at 11:15:01AM -0500, rickey c weisner wrote: > Greetings, > I used the SE toolkit for years. I was particularly fond of > nx.se. It was not unusual for me to have to add support > for new NIcs. > > So I have written my own tool using C and the kstat api. > It giv

Re: [perf-discuss] Scheduling latency

2008-05-21 Thread Brendan Gregg - Sun Microsystems
G'Day Henrik, On Wed, May 21, 2008 at 07:24:50PM +0200, Henrik Johansson wrote: > Hello all, > > I a bit curious, what other factors that the availability of CPU-time > can cause latency for processes scheduling? > > I have a few M5000 running 127111-10 with lots of CPU-cycles to spare, > bu

Re: [perf-discuss] Scheduling latency

2008-05-21 Thread Zeljko Vrba
On Wed, May 21, 2008 at 07:24:50PM +0200, Henrik Johansson wrote: > > Total idle time reported by vmstat is about 60-80% and mpstat shows > that no cpu(hwthread) is utilized to even near the 100%. I've also > seen that the run queue sometimes goes up to 2 while we still have > lots of cpu-t

[perf-discuss] Scheduling latency

2008-05-21 Thread Henrik Johansson
Hello all, I a bit curious, what other factors that the availability of CPU-time can cause latency for processes scheduling? I have a few M5000 running 127111-10 with lots of CPU-cycles to spare, but according to microstate accounting threads sometimes spend ~5-35% of their time waiting to