On Wed, Feb 26, 2014 at 3:39 AM, Andy Lutomirski <l...@amacapital.net> wrote: > On 02/17/2014 10:07 PM, Yan, Zheng wrote: >> >> This patch series adds LBR call stack support. User can enabled/disable >> this through an sysfs attribute file in the CPU PMU directory: >> echo 1 > /sys/bus/event_source/devices/cpu/lbr_callstack > > This seems like an unpleasant way to control this. It would be handy to > be able to control this as an option to perf record. > That would mean you'd be root for perf. Or are you suggesting a perf event option? But then, you'd expose arch-specific feature at the API level.
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