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authorEric Dumazet <edumazet@google.com>2013-08-09 01:38:47 +0400
committerDavid S. Miller <davem@davemloft.net>2013-08-10 12:16:44 +0400
commit28d6427109d13b0f447cba5761f88d3548e83605 (patch)
tree5f463fa756d508625e8cea1da31406e66a0b263e /drivers/net/macvtap.c
parente370a7236321773245c5522d8bb299380830d3b2 (diff)
downloadlinux-28d6427109d13b0f447cba5761f88d3548e83605.tar.xz
net: attempt high order allocations in sock_alloc_send_pskb()
Adding paged frags skbs to af_unix sockets introduced a performance regression on large sends because of additional page allocations, even if each skb could carry at least 100% more payload than before. We can instruct sock_alloc_send_pskb() to attempt high order allocations. Most of the time, it does a single page allocation instead of 8. I added an additional parameter to sock_alloc_send_pskb() to let other users to opt-in for this new feature on followup patches. Tested: Before patch : $ netperf -t STREAM_STREAM STREAM STREAM TEST Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 2304 212992 212992 10.00 46861.15 After patch : $ netperf -t STREAM_STREAM STREAM STREAM TEST Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 2304 212992 212992 10.00 57981.11 Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: David Rientjes <rientjes@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/macvtap.c')
-rw-r--r--drivers/net/macvtap.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/macvtap.c b/drivers/net/macvtap.c
index 182364abfa35..8f6056d9ba97 100644
--- a/drivers/net/macvtap.c
+++ b/drivers/net/macvtap.c
@@ -524,7 +524,7 @@ static inline struct sk_buff *macvtap_alloc_skb(struct sock *sk, size_t prepad,
linear = len;
skb = sock_alloc_send_pskb(sk, prepad + linear, len - linear, noblock,
- err);
+ err, 0);
if (!skb)
return NULL;