On 19 December 2015 at 10:42, Rabin Vincent <rabin@xxxxxx> wrote: > On Fri, Dec 18, 2015 at 01:58:56PM -0700, Mathieu Poirier wrote: >> This patchset aims to integrate configuration and control of >> the Coresight tracers with the perf sub-system. >> >> The goal is to use PMUs to represent tracers and the auxiliary >> buffer enhancement to collect processor traces. As such a lot >> of work is done to move the current Coresight sysFS oriented >> configuration and control commands to perf's AUX API. > > These patches allow the trace to be recorded with perf, but what do you > use to actually get something useful out of the resulting perf.data? > AFAICS it can't be processed by perf script or the other perf tools. You are correct. The team is working on a trace decoder that will be embedded in the perf tool suite. > > # echo 1 > /sys/bus/coresight/devices/54162000.etb/enable_sink > > # perf record -e cs_etm// true > [ perf record: Woken up 1 times to write data ] > [ perf record: Captured and wrote 0.032 MB perf.data ] > > # perf script > 0x188 [0x80]: failed to process type: 70 -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
