diff options
| author | [email protected] <[email protected]> | 2015-05-14 08:00:25 +0000 |
|---|---|---|
| committer | David S. Miller <[email protected]> | 2015-05-15 02:49:30 +0000 |
| commit | 7eafd9b4005643cfc24f1daf78f4dd56ff71f559 (patch) | |
| tree | e6ce83d089c50b5e388652bc07f42f0ff8793fa9 /net/switchdev/switchdev.c | |
| parent | test_bpf: fix sparse warnings (diff) | |
| download | kernel-7eafd9b4005643cfc24f1daf78f4dd56ff71f559.tar.gz kernel-7eafd9b4005643cfc24f1daf78f4dd56ff71f559.zip | |
hv_netvsc: use per_cpu stats to calculate TX/RX data
Current code does not lock anything when calculating the TX and RX stats.
As a result, the RX and TX data reported by ifconfig are not accuracy in a
system with high network throughput and multiple CPUs (in my test,
RX/TX = 83% between 2 HyperV VM nodes which have 8 vCPUs and 40G Ethernet).
This patch fixed the above issue by using per_cpu stats.
netvsc_get_stats64() summarizes TX and RX data by iterating over all CPUs
to get their respective stats.
This v2 patch addressed David's comments on the cleanup path when
netdev_alloc_pcpu_stats() failed.
Signed-off-by: Simon Xiao <[email protected]>
Reviewed-by: K. Y. Srinivasan <[email protected]>
Reviewed-by: Haiyang Zhang <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Diffstat (limited to 'net/switchdev/switchdev.c')
0 files changed, 0 insertions, 0 deletions