Re: [perf-discuss] Can dtrace cpc provider support 2+ probes?

2010-06-18 Thread Jonathan Haslam
Hi Kuriakose, collect(1), the other user of overflow profiling, samples the counters on overflow and on the subsequent program, writes the last sampled value instead of the initial value to the counter that did not overflow. Jonathan, is the current behaviour what is expected of dtrace cpc or

Re: [perf-discuss] High dtlb-miss in kernel

2006-11-02 Thread Jonathan Haslam
Yes I think this is something I'm looking for, but I'm not sure if I can use your Cap-Eye kernel image because my code changes are in kernel modules such as ip, sockfs and genunix. Nevertheless, I'll be happy to try it. Unfortunately I touch a few areas in genunix so I don't think you're goi

Re: [perf-discuss] High dtlb-miss in kernel

2006-11-01 Thread Jonathan Haslam
While investigating a performance problem in my prototype workspace, I found that the dtlb-miss rate is about 16% higher than that of the baseline, so I suspect that the high tlb miss could be the issue. So, how can I get the statistics on the PC addresses when the tlb miss happens? Can DTrace