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authorJiong Wang <jiong.wang@netronome.com>2017-12-01 00:32:59 -0500
committerDaniel Borkmann <daniel@iogearbox.net>2017-12-01 14:59:20 -0500
commit8c90053858fce1ca60fab7be03bb61d314ea5c1c (patch)
tree4e46460a1a160d6fcf085a7da61b7d557f08ae0a /tools/perf/scripts/python
parent9879a3814beb3b1350755475e67a8d92ba1f7e4b (diff)
nfp: bpf: implement memory bulk copy for length bigger than 32-bytes
When the gathered copy length is bigger than 32-bytes and within 128-bytes (the maximum length a single CPP Pull/Push request can finish), the strategy of read/write are changeed into: * Read. - use direct reference mode when length is within 32-bytes. - use indirect mode when length is bigger than 32-bytes. * Write. - length <= 8-bytes use write8 (direct_ref). - length <= 32-byte and 4-bytes aligned use write32 (direct_ref). - length <= 32-bytes but not 4-bytes aligned use write8 (indirect_ref). - length > 32-bytes and 4-bytes aligned use write32 (indirect_ref). - length > 32-bytes and not 4-bytes aligned and <= 40-bytes use write32 (direct_ref) to finish the first 32-bytes. use write8 (direct_ref) to finish all remaining hanging part. - length > 32-bytes and not 4-bytes aligned use write32 (indirect_ref) to finish those 4-byte aligned parts. use write8 (direct_ref) to finish all remaining hanging part. Signed-off-by: Jiong Wang <jiong.wang@netronome.com> Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'tools/perf/scripts/python')
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