10.09.2010 18:56, Avi Kivity пишет: > On 09/10/2010 05:47 PM, Michael Tokarev wrote: >> 10.09.2010 16:50, Avi Kivity wrote: >> [] >>>> During this shot, host CPU was about 30..35% in use - higher >>>> than usual 25%, but I guess it's due to perfmon. >>> Please build qemu with --disable-strip and use 'perf' to profile it. >> Done, I tried several different options, but I can't find >> anything intesting in there. Attaching a screenshot of >> 3 - win7 guest (~5 minutes after startup), `perf top' >> in xterm and `top' in another xterm. >> >> Here are random snapshots of both, in text form: >> >> PerfTop: 1409 irqs/sec kernel:79.6% exact: 0.0% [1000Hz cycles], (all, 2 CPUs) >> >> samples pcnt function DSO >> _______ _____ __________________ _________________ >> 11837.00 64.9% native_safe_halt [kernel.kallsyms] >> 570.00 3.1% rb_next [kernel.kallsyms] >> 206.00 1.1% hpet_next_event [kernel.kallsyms] >> 149.00 0.8% do_select [kernel.kallsyms] >> 149.00 0.8% svm_vcpu_run [kvm_amd] >> 134.00 0.7% schedule [kernel.kallsyms] >> >> >> Tasks: 199 total, 2 running, 196 sleeping, 0 stopped, 1 zombie >> Cpu(s): 13.4%us, 10.2%sy, 0.0%ni, 76.3%id, 0.0%wa, 0.0%hi, 0.2%si, 0.0%st >> Mem: 5860724k total, 4601132k used, 1259592k free, 18508k buffers >> Swap: 4192928k total, 286928k used, 3906000k free, 1593908k cached >> >> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND >> 28492 mjt 20 0 1111m 1.0g 5456 R 27 17.7 3:50.79 qemu-system-x86 >> 28763 root 20 0 105m 30m 6176 S 11 0.5 184:08.58 Xorg >> 29263 mjt 20 0 637m 212m 11m S 6 3.7 92:08.82 firefox-bin >> 28845 mjt 20 0 58612 5840 2372 S 2 0.1 49:27.17 compiz >> >> I'm still not sure where to look at.. :) > > Strange. Can you also post a few lines of 'vmstat 1'? > > Maybe we'll see a lot of context switches in there. Not that many. Still running the same w7 guest, still ~25..27% CPU usage reported by top for the kvm process, here's `vmstat 5' after a while (I tend to use larger delay to mitigate large(ish) spikes): procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 0 0 286764 1262976 20640 1618468 0 0 0 24 6206 4460 7 9 84 0 1 0 286764 1263040 20640 1618436 0 0 0 0 6080 4415 7 9 84 0 1 0 286764 1264380 20648 1618448 0 0 0 5 6332 4576 8 11 81 0 1 0 286760 1264700 20656 1618436 6 0 6 18 6464 4742 7 8 84 1 1 0 286760 1264864 20664 1618472 0 0 0 10 6266 4704 8 8 85 0 0 0 286760 1265004 20668 1618440 0 0 0 1 6330 4683 6 8 86 0 0 0 286760 1264660 20668 1618452 0 0 0 1 6401 4675 7 8 85 0 1 0 286760 1264668 20668 1618464 0 0 0 0 6239 4688 7 8 85 0 0 0 286760 1264692 20676 1618472 0 0 0 10 6445 4703 7 9 84 0 1 0 286760 1264204 20676 1618480 0 0 8 1 6180 4587 7 8 85 1 0 0 286760 1263956 20684 1618492 0 0 0 10 6314 4630 7 9 83 0 0 0 286760 1263972 20684 1618504 0 0 0 0 6222 4569 7 9 84 0 2 0 286760 1264128 20692 1618504 0 0 0 18 6458 5006 8 9 83 0 Thanks! /mjt -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
