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author | Jason Wang <jasowang@redhat.com> | 2013-09-02 12:40:57 +0400 |
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committer | David S. Miller <davem@davemloft.net> | 2013-09-04 06:46:57 +0400 |
commit | c92112aed3f0b14fdd2dbd9f192cce1af22c0e1c (patch) | |
tree | ee7b35d59a5ab61b295e33087862b381481ed292 /drivers/hwmon/adt7475.c | |
parent | 094afe7d556428a2ce2df0f6a4b333f7ba4d74d5 (diff) | |
download | linux-c92112aed3f0b14fdd2dbd9f192cce1af22c0e1c.tar.xz |
vhost_net: use vhost_add_used_and_signal_n() in vhost_zerocopy_signal_used()
We tend to batch the used adding and signaling in vhost_zerocopy_callback()
which may result more than 100 used buffers to be updated in
vhost_zerocopy_signal_used() in some cases. So switch to use
vhost_add_used_and_signal_n() to avoid multiple calls to
vhost_add_used_and_signal(). Which means much less times of used index
updating and memory barriers.
2% performance improvement were seen on netperf TCP_RR test.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/hwmon/adt7475.c')
0 files changed, 0 insertions, 0 deletions