Date: Fri, 23 Aug 2013 08:55:06 +0000 From: Venkata Duvvuru <VenkatKumar.Duvvuru@Emulex.Com> To: "freebsd-current@freebsd.org" <freebsd-current@freebsd.org> Subject: OCE driver on Freebsd 10.0-Current Message-ID: <BF3270C86E8B1349A26C34E4EC1C44CB2BD65B1B@CMEXMB1.ad.emulex.com>
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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 driver 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 iperf hangs, while iperf is running fine, the intr WCPU percentage is very low. 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: clock}
/Venkat.
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