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From: Venkata Duvvuru <VenkatKumar.Duvvuru@Emulex.Com>
To: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>
Subject: OCE driver on Freebsd 10.0-Current
Thread-Topic: OCE driver on Freebsd 10.0-Current
Thread-Index: Ac6fO+XzxuQFS+LCR6+MNWpJ0LobFg==
Date: Thu, 22 Aug 2013 13:32:06 +0000
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Hi,
I'm running iperf on Emulex's OCE network adapter in Freebsd-10-current. At=
 heavy traffic (iperf with ~10 connections), iperf is hanging. The same dri=
ver is working on all other Freebsd versions.
top -HS shows the below information.
PID USERNAME   PRI NICE   SIZE    RES STATE   C   TIME   WCPU COMMAND
   11 root       155 ki31     0K   128K CPU4    4 146:36 100.00% idle{idle:=
 cpu4}
   12 root       -60    -     0K   688K CPU6    6  52:38 100.00% intr{swi4:=
 clock}
   11 root       155 ki31     0K   128K CPU2    2 148:42 99.66% idle{idle: =
cpu2}
   11 root       155 ki31     0K   128K CPU7    7 149:24 99.27% idle{idle: =
cpu7}
   11 root       155 ki31     0K   128K RUN     0 148:00 99.27% idle{idle: =
cpu0}
   11 root       155 ki31     0K   128K CPU1    1 149:44 99.17% idle{idle: =
cpu1}
   11 root       155 ki31     0K   128K CPU5    5 148:46 99.17% idle{idle: =
cpu5}
   11 root       155 ki31     0K   128K CPU3    3  96:57 89.06% idle{idle: =
cpu3}
   11 root       155 ki31     0K   128K RUN     6 149:11 13.87% idle{idle: =
cpu6}

One interesting thing I observed is that intr is taking 100% on CPU6 when i=
perf hangs, while iperf is running fine, the intr WCPU percentage is very l=
ow. What does this below line mean? Why intr is 100% on CPU6??
12 root       -60    -     0K   688K CPU6    6  52:38 100.00% intr{swi4: cl=
ock}

/Venkat.