Am Donnerstag 16 Juni 2011, 09:56:20 schrieb Brad Campbell: > On 14/06/11 22:22, Brad Campbell wrote: > So it turns out that there is no direct way to enable CONFIG_TRACING. If > you have perf enabled then powertop won't spit out the diagnostic message > telling you to enable both perf and trace. After an hour of rooting > through Kconfig files, I finally figured out the quickest way to enable > TRACING was in the Kernel hacking menu ; Tracers (CONFIG_FTRACE) ; Kernel > Function Tracer (CONFIG_FUNCTION_TRACER), which selects GENERIC_TRACER > which in turn selects CONFIG_TRACING. > > Did I miss something obvious in the docs? > > Regards, > Brad
Yeah it seems you have to enable CONFIG_FTRACE. So maybe powertop should suggest this one in the first place? @Edwin and Brad: Thanks for finding this out - I'll send a patch that spits out the message if access to /sys/kernel/debug/tracing/events fails. Thanks, Peter _______________________________________________ Power mailing list [email protected] https://bughost.org/mailman/listinfo/power
