From: Petri Savolainen <petri.savolai...@linaro.org> For minimal code complexity and negative impact, prefetch only when the requested address is in the first segment and prefetch only one cache line.
Signed-off-by: Petri Savolainen <petri.savolai...@linaro.org> --- /** Email created from pull request 437 (psavol:master-packet-optim) ** https://github.com/Linaro/odp/pull/437 ** Patch: https://github.com/Linaro/odp/pull/437.patch ** Base sha: b95ccd3db6eeb7358a877541747e06354429acdd ** Merge commit sha: 3c2134ecc18e4fd52cd526b5c067815ca73864cc **/ platform/linux-generic/include/odp/api/plat/packet_inlines.h | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/platform/linux-generic/include/odp/api/plat/packet_inlines.h b/platform/linux-generic/include/odp/api/plat/packet_inlines.h index dee8f71ce..4c0f88aa2 100644 --- a/platform/linux-generic/include/odp/api/plat/packet_inlines.h +++ b/platform/linux-generic/include/odp/api/plat/packet_inlines.h @@ -225,7 +225,14 @@ static inline odp_packet_seg_t _odp_packet_next_seg(odp_packet_t pkt, static inline void _odp_packet_prefetch(odp_packet_t pkt, uint32_t offset, uint32_t len) { - (void)pkt; (void)offset; (void)len; + uint32_t seg_len = _odp_packet_seg_len(pkt); + uint8_t *data = (uint8_t *)_odp_packet_data(pkt); + (void)len; + + if (odp_unlikely(offset >= seg_len)) + return; + + odp_prefetch(data + offset); } static inline int _odp_packet_copy_from_mem(odp_packet_t pkt, uint32_t offset,
