CentOS V6.8 And Double Received Bytes

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I’m observing double the amount of “recv” bytes in latest CentOS v6.8 with ixgbe 4.2.1-k.

Anybody seeing the same?

$ ethtool -i em1
driver: ixgbe version: 4.2.1-k

$ uname -an Linux chndcdmid01.rd.ph.cox.net 2.6.32-642.4.2.el6.x86_64 #1 SMP Tue Aug 23
19:58:13 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

Doing comparison on 2 days at same hour just to show the difference. This is an HTTP cache server, having higher RX than TX means something is bad… We don’t rely much on the RECV side, but our graph showed a huge difference between upgrades.

Before upgrade (v6.7, 4.0.1-k) :
07:00:01 PM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s
07:00:01 PM em1 3971.90 5384.15 14981.65 26376.80 0.00
0.00 0.00
07:10:01 PM em1 3918.26 5367.79 13136.21 25528.40 0.00
0.00 0.00
07:20:01 PM em1 3868.94 5273.08 11997.37 25155.92 0.00
0.00 0.00
07:30:01 PM em1 3895.50 5597.56 10851.74 28583.84 0.00
0.00 0.00
07:40:01 PM em1 3956.80 5706.12 12230.66 29553.73 0.00
0.00 0.00
07:50:01 PM em1 4016.39 5801.69 11957.35 29979.04 0.00
0.00 0.00

After upgrade (v6.8, 4.2.1-k) :
07:00:01 PM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s
07:00:01 PM em1 20857.40 8736.13 59710.07 35102.76 0.00
0.00 0.00
07:10:01 PM em1 19508.00 8429.40 58120.70 36036.64 0.00
0.00 0.00
07:20:01 PM em1 19128.20 8471.45 55502.07 37312.56 0.00
0.00 0.00
07:30:01 PM em1 19402.55 8329.93 53586.60 35386.52 0.00
0.00 0.00
07:40:01 PM em1 19188.27 8105.83 51463.72 33585.55 0.00
0.00 0.00
07:50:01 PM em1 19544.32 7843.08 49590.64 30981.99 0.00
0.00 0.00

Steve

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