[dpdk-dev] [PATCH] net/virtio: enable packet data prefetch on x86

[Marvin Liu]

Data prefetch instruction can preload data into cpu’s hierarchical
cache before data access. Virtio datapath utilized this feature for
data access acceleration. As config RTE_PMD_PACKET_PREFETCH was
discarded, now packet data prefetch is enabled based on architecture.

Signed-off-by: Marvin Liu <yong.liu at intel.com>

diff --git a/drivers/net/virtio/virtqueue.h b/drivers/net/virtio/virtqueue.h
index 42c4c9882..0196290a5 100644
--- a/drivers/net/virtio/virtqueue.h
+++ b/drivers/net/virtio/virtqueue.h
@@ -106,7 +106,7 @@ virtqueue_store_flags_packed(struct vring_packed_desc *dp,
 		dp->flags = flags;
 	}
 }
-#ifdef RTE_PMD_PACKET_PREFETCH
+#if defined(RTE_ARCH_X86)
 #define rte_packet_prefetch(p)  rte_prefetch1(p)
 #else
 #define rte_packet_prefetch(p)  do {} while(0)
-- 
2.17.1