On Tue, 2017-06-13 at 13:05:48 UTC, Nicholas Piggin wrote: > msgsnd doorbell exceptions are cleared when the doorbell interrupt is > taken. However if a doorbell exception causes a system reset interrupt > wake from power saving state, the message is not cleared. Processing > the doorbell from the system reset interrupt requires msgclr to avoid > taking the exception again. > > Testing this plus the previous wakup direct patch gives: > > original wakeup direct msgclr > Different threads, same core: 315k/s 264k/s 345k/s > Different cores: 235k/s 242k/s 242k/s > > Net speedup is +10% for same core, and +3% for different core. > > Reviewed-by: Gautham R. Shenoy <e...@linux.vnet.ibm.com> > Signed-off-by: Nicholas Piggin <npig...@gmail.com>
Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/a9af97aa0a12c30178dd7ad9af8887 cheers
