30 Jan
2015
30 Jan
'15
4:14 a.m.
On 30 January 2015 at 09:16, ethan zhao ethan.zhao@oracle.com wrote:
You mean the policy is shared by all CPUs, so PPC notification about one
A policy may or maynot be shared by multiple CPUs. It all depends on your systems configuration. All CPUs which share clock line, share a policy.
You can verify that from /sys/devices/system/cpu/cpu*/related_cpus. This gives the CPUs that share policy.
CPU should update all CPU's policy, right ? even the requested CPU is shutting down.
CPUs sharing policy have a single policy structure. And so policy would be updated for all CPUs that share the poilcy. Even if some cpu goes down, the policy might still be up and running.
-- viresh