summaryrefslogtreecommitdiff
path: root/arch/powerpc/kernel/idle_power7.S
diff options
context:
space:
mode:
authorAnton Blanchard <anton@samba.org>2014-09-16 10:49:14 +1000
committerMichael Ellerman <mpe@ellerman.id.au>2014-09-25 23:14:49 +1000
commit423216ed3273dae18c347ce52c5ecc193cfdd4e5 (patch)
tree9f1f095dbd57904697dabd2c463e1decace2faa8 /arch/powerpc/kernel/idle_power7.S
parentff2e466aa2339238c941dee873e553687e941f3f (diff)
downloadlinux-next-423216ed3273dae18c347ce52c5ecc193cfdd4e5.tar.gz
powerpc: Use CONFIG_ARCH_HAS_FAST_MULTIPLIER
I ran some tests to compare hash_64 using shifts and multiplies. The results: POWER6: ~2x slower POWER7: ~2x faster POWER8: ~2x faster Now we have a proper config option, select CONFIG_ARCH_HAS_FAST_MULTIPLIER on POWER7 and POWER8. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/idle_power7.S')
0 files changed, 0 insertions, 0 deletions