Hey all-
Sorry for the delay here, but it took me a bit to get the perf bits
working to my satisfaction. As Ingo requested I added do_csum to the perf
benchmarking utility (as part of the mem suite, since it didn't seem right to
create its own suite). I've also revamped the do_csum routine to do some smart
prefetching, as it yielded slightly better performance over simple prefetching
at a fixed stride:
Without prefetch:
[root@rdma-dev-02 perf]# ./perf bench mem csum -r x86-64-csum -l 1500B -s 512MB
-i 1000000 -c
# Running mem/csum benchmark...
# Copying 1500B Bytes ...
0.955977 Cycle/Byte
With prefetch:
[root@rdma-dev-02 perf]# ./perf bench mem csum -r x86-64-csum -l 1500B -s 512MB
-i 1000000 -c
# Running mem/csum benchmark...
# Copying 1500B Bytes ...
0.922540 Cycle/Byte
About a 3% improvement.
Signed-off-by: Neil Horman <[email protected]>
CC: [email protected]
CC: Thomas Gleixner <[email protected]>
CC: Ingo Molnar <[email protected]>
CC: "H. Peter Anvin" <[email protected]>
CC: [email protected]
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