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xen-netback: batch copies for multiple to-guest rx packets

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Instead of flushing the copy ops when an packet is complete, complete
packets when their copy ops are done.  This improves performance by
reducing the number of grant copy hypercalls.

Latency is still limited by the relatively small size of the copy
batch.

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
[re-based]
Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Vrabel
2016-10-04 10:29:17 +01:00
committed by David S. Miller
parent 98f6d57ced
commit a37f12298c
2 changed files with 18 additions and 10 deletions
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1
drivers/net/xen-netback/common.h
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@@ -132,6 +132,7 @@ struct xenvif_copy_state {
struct gnttab_copy op[COPY_BATCH_SIZE];
RING_IDX idx[COPY_BATCH_SIZE];
unsigned int num;
struct sk_buff_head *completed;
};
struct xenvif_queue { /* Per-queue data for xenvif */