On 05/30/2015 11:31 AM, Vaidyanathan Srinivasan wrote: > * Preeti U Murthy <pre...@linux.vnet.ibm.com> [2015-05-29 19:17:17]: > > [snip] > >>> + if (max_idle_state > 1) { >>> + snooze_timeout_en = true; >>> + snooze_timeout = cpuidle_state_table[1].target_residency * >>> + tb_ticks_per_usec; >>> + } >> >> Any idea why we don't have snooze defined on the shared lpar configuration ? > > In shared lpar case, spinning in guest context may potentially take > away cycles from other lpars waiting to run on the same physical cpu. > > So the policy in shared lpar case is to let PowerVM hypervisor know > immediately that the guest cpu is idle which will allow the hypervisor > to use the cycles for other tasks/lpars. >
Oh Ok! Thanks for the clarification ! Regards Preeti U Murthy > --Vaidy > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/