Hi Mark, > On Oct 2, 2018, at 4:46 AM, Mark Rutland <mark.rutl...@arm.com> wrote: > > [NOTICE: This email originated from an external sender. Please be mindful of > safe email handling and proprietary information protection practices.] > ________________________________________________________________________________________________________________________ > > Hi Hoan, > > On Wed, Sep 19, 2018 at 06:44:30PM +0000, Hoan Tran wrote: >> This patch adds CPU hotplug support where the PMU migrates the context to >> another online CPU when its CPU is offline. >> >> It fixes the below issue where the user does offline the CPU which is >> assigned >> to this PMU. >> >> Assuming, CPU0 is assigned for this PMU. When the user does offline CPU0 >> [root@(none) ~]# echo 0 > /sys/devices/system/cpu/cpu0/online >> This PMU does not work anymore and shows the below error. >> [root@(none) ~]# perf stat -a -e l3c0/cycle-count/,l3c0/write/ sleep 1 >> Error: >> The sys_perf_event_open() syscall returned with 19 (No such device) for >> event (l3c0/cycle-count/). >> /bin/dmesg may provide additional information. >> No CONFIG_PERF_EVENTS=y kernel support configured? >> >> With this patch, when CPU0 is offline, PMU migrates to another online CPU and >> works on that CPU. >> >> Signed-off-by: Hoan Tran <hoan.t...@amperecomputing.com> >> --- >> v2: >> * Remove the cpuhp instance when unregistering the PMU > > Unfortunately, this has come through whitespae-damaged, with a > disclaimer in the footer. > > Could you please resend with those two details fixed?
I’ll fix it and send you another version later. Thanks and Regards Hoan > > Thanks, > Mark.
