From b6dcde5c74d1cbf16da37202a14fa187dce6e4c0 Mon Sep 17 00:00:00 2001 From: Anton Blanchard Date: Sun, 11 Oct 2009 21:47:34 +0000 Subject: powerpc: Fix hypervisor TLB batching Profiling of a page fault scalability microbenchmark shows flush_hash_range is not calling the batch hpte invalidate hcall (H_BULK_REMOVE). It turns out we have a duplicate firmware feature for hcall-bulk and the current setup code stops after finding the first match. This meant we never batch and always do individual invalidates. The patch below removes the duplicate and shifts FW_FEATURE_CMO to close the gap. With the patch applied the single threaded page fault rate improves from 217169 to 238755 per second on a POWER5 test box, a 10% improvement. Signed-off-by: Anton Blanchard Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/platforms/pseries/firmware.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'arch/powerpc/platforms/pseries/firmware.c') diff --git a/arch/powerpc/platforms/pseries/firmware.c b/arch/powerpc/platforms/pseries/firmware.c index 5a707da3f5c..0a14d8cd314 100644 --- a/arch/powerpc/platforms/pseries/firmware.c +++ b/arch/powerpc/platforms/pseries/firmware.c @@ -51,11 +51,10 @@ firmware_features_table[FIRMWARE_MAX_FEATURES] = { {FW_FEATURE_VIO, "hcall-vio"}, {FW_FEATURE_RDMA, "hcall-rdma"}, {FW_FEATURE_LLAN, "hcall-lLAN"}, - {FW_FEATURE_BULK, "hcall-bulk"}, + {FW_FEATURE_BULK_REMOVE, "hcall-bulk"}, {FW_FEATURE_XDABR, "hcall-xdabr"}, {FW_FEATURE_MULTITCE, "hcall-multi-tce"}, {FW_FEATURE_SPLPAR, "hcall-splpar"}, - {FW_FEATURE_BULK_REMOVE, "hcall-bulk"}, }; /* Build up the firmware features bitmask using the contents of -- cgit v1.2.3-70-g09d2