On 06/30/2010 04:18 PM, Alexander Graf wrote:
Book3s suffered from my really bad shadow MMU implementation so far. So
I finally got around to implement a combined hash and list mechanism that
allows for much faster lookup of mapped pages.
To show that it really is faster, I tried to run simple process spawning
code inside the guest with and without these patches:
[without]
debian-powerpc:~# time for i in {1..1000}; do /bin/echo hello> /dev/null; done
real 0m20.235s
user 0m10.418s
sys 0m9.766s
[with]
debian-powerpc:~# time for i in {1..1000}; do /bin/echo hello> /dev/null; done
real 0m14.659s
user 0m8.967s
sys 0m5.688s
So as you can see, performance improved significantly.
v2 -> v3:
- use hlist
- use global slab cache
Looks good.
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
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