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List: freebsd-fs
Subject: Troubleshoot high interrupt on CPU
From: Karli Sjöberg <karli.sjoberg () slu ! se>
Date: 2016-01-18 14:52:19
Message-ID: 1453128791.3882.23.camel () slu ! se
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Hey all!
We ´re experiencing intermittent "episodes" on especially one of our
storage servers, that CPU usage goes over 450%:
456.69% [intr]
RUN 90.97% [intr{irq265: ix0:que }]
CPU2 88.96% [intr{irq266: ix0:que }]
WAIT 55.96% [intr{irq268: ix0:que }]
RUN 52.98% [intr{irq267: ix0:que }]
WAIT 41.99% [intr{irq279: ix1:que }]
CPU5 37.99% [intr{irq278: ix1:que }]
WAIT 36.96% [intr{irq277: ix1:que }]
CPU3 25.98% [intr{irq276: ix1:que }]
So from this I ´m thinking it ´s something to do with the network, since
it ´s ix interfaces. During these episodes network traffic goes down to
nil and clients loose contact, iSCSI-disks reconnects, directories can ´t
open, music stops playing, etc. How can I debug this further? Is there
more information I can supply that would help you better understand the
situation?
/K
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