Messages in this thread | | | Date | Wed, 26 Feb 2014 08:04:00 +0100 | Subject | Re: [PATCH v3 00/14] perf, x86: Haswell LBR call stack support | From | Stephane Eranian <> |
| |
On Wed, Feb 26, 2014 at 3:39 AM, Andy Lutomirski <luto@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.
> --Andy
| |