On 6/17/2011 5:41 PM, Peter Hüwe wrote: > 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.
ok finally the missing link is found ;-) I'll stick the patches in to fix the suggestion.... I'll look into adding something sensible to the readme file as well. _______________________________________________ Power mailing list [email protected] https://bughost.org/mailman/listinfo/power
