Hi Stanislav, On Mon, 16 Jun 2014 10:08:04 +0400, Stanislav Fomichev wrote: >> It was because, as I said, my system doesn't have pread64 syscall.. you >> missed to decrease rec_argc when skipping invalid events. :) > Thanks, missed that! > >> After fixing the problem, I could run timechart and generate an >> output.svg file. But it doesn't show any IO activity.. process info was >> there in grey boxes (rect.process3) but no color boxes. I also tried >> recording with ping and dd, but the result was same. I suspect it's >> because of some mis-calculation of position or size of the boxes. > Did you try it with all patches applied? Because if you have really fast > IO you can miss it (unless you applied perf timechart: add more options > to IO mode).
I applied all your three patches. $ git log --oneline -3 ddba809264f7 perf timechart: add more options to IO mode 81cc94085210 perf timechart: conditionally update start_time on fork 6aea1951c072 perf timechart: implement IO mode $ perf --version perf version 3.15.rc4.gddba809 $ perf timechart record -I dd if=/dev/zero of=xxx bs=4k count=10k 10240+0 records in 10240+0 records out 41943040 bytes (42 MB) copied, 0.0533579 s, 786 MB/s [ perf record: Woken up 16 times to write data ] [ perf record: Captured and wrote 4.209 MB perf.data (~183881 samples) ] $ perf timechart Written 0.1 seconds of trace to output.svg > Can you somehow share your perf.data with me? I'll check what's going > on. https://git.kernel.org/cgit/linux/kernel/git/namhyung/linux-perf.git/plain/tools/perf/perf.timechart.data?h=perf/tmp Thanks, Namhyung -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
