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author | 2019-07-09 17:54:32 +0800 | |
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committer | 2019-09-11 19:20:27 +0000 | |
commit | 840f64b4b2d6063adebb8c7b31c9357aaaf8dd5e (patch) | |
tree | 34af2303319245845dd701953d51681850d9d84b /src/vnet/dir.dox | |
parent | fe2523d1a42c66ee3ddd594fad1cf5ac91c66c54 (diff) |
ip: apply dual loop unrolling in ip4_rewrite
Too many prefetches within loop unrollings induce bottleneck and
performance degradation on some CPUs which have less cache line fill
buffers, e.g, Arm Cortex-A72.
Apply dual loop unrolling and tune prefetches manually to remove
hot-spot with prefetch instructions, to get throughput improvement.
It brings about 7% throughput improvement and saves 28% clocks with
ip4_rewrite nodes on Cortex-A72 CPUs.
Type: feature
Change-Id: I0d35ef19faccbd7a5a4647f50bc369bfcb01a20d
Signed-off-by: Lijian Zhang <Lijian.Zhang@arm.com>
Diffstat (limited to 'src/vnet/dir.dox')
0 files changed, 0 insertions, 0 deletions