Article View: comp.sys.next.hardware
Article #1471Spurious DMA Interrupts
From: druck Dennis W. Ruck
Date: Tue, 05 Jan 1993 21:30
Date: Tue, 05 Jan 1993 21:30
63 lines
2827 bytes
2827 bytes
My previous post got garbled somehow ;-( Here's what I hope will be a complete
post.
I have what I believe is a network related problem, but my network gurus here
have been unable to track down any problems. The symptons are that whenever I
perform some function that requires network access (nfs, ftp, ...) I get error
messages of the following sort logged:
Spurious DMA interrupt - state = 1000000 @ 2000110
en0: transmitter not ready
spurious DMA interrupt
Jan 5 15:00:45 gandalf su: druck on /dev/ttyp1
spurious DMA interrupt
spurious DMA interrupt
NFS server frodo not responding still trying
Jan 5 15:45:12 gandalf lookupd[77]: netinfo failure, sleeping
NFS server frodo ok
Jan 5 15:59:31 gandalf lookupd[77]: netinfo waking
NFS server frodo not responding still trying
spurious DMA interrupt
Spurious DMA interrupt - state = 1000000 @ 2000110
Spurious DMA interrupt - state = 1000000 @ 2000110
spurious DMA interrupt
Network access is definitely slower than before these symptons cropped up.
Also, ping gives unusual results as shown:
gandalf<54> ping frodo
PING frodo: 56 data bytes
64 bytes from 129.92.100.18: icmp_seq=1. time=2. ms
64 bytes from 129.92.100.18: icmp_seq=2. time=2. ms
64 bytes from 129.92.100.18: icmp_seq=3. time=2. ms
64 bytes from 129.92.100.18: icmp_seq=4. time=38. ms
64 bytes from 129.92.100.18: icmp_seq=5. time=2. ms
64 bytes from 129.92.100.18: icmp_seq=6. time=2. ms
64 bytes from 129.92.100.18: icmp_seq=7. time=2. ms
64 bytes from 129.92.100.18: icmp_seq=8. time=2. ms
64 bytes from 129.92.100.18: icmp_seq=9. time=2. ms
64 bytes from 129.92.100.18: icmp_seq=10. time=2. ms
[... lines deleted ...]
64 bytes from 129.92.100.18: icmp_seq=67. time=42. ms
64 bytes from 129.92.100.18: icmp_seq=68. time=2. ms
64 bytes from 129.92.100.18: icmp_seq=69. time=2. ms
^C
----frodo PING Statistics----
70 packets transmitted, 65 packets received, 7% packet loss
round-trip (ms) min/avg/max = 2/6/60
gandalf<55>
I would appreciate any help in tracking down the cause of these problems.
Thanks!
Dennis
--
Dennis W. Ruck Air Force Institute of Technology
druck@afit.af.mil Wright-Patterson AFB, Ohio
(NeXTmail Welcome)
Technical Details
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Newsgroups: comp.sys.next.hardware Path: arc1-ca.pugleaf.net!sparky!uunet!gatech!paladin.american.edu!howland.reston.ans.net!zaphod.mps.ohio-state.edu!cis.ohio-state.edu!udecc.engr.udayton.edu!blackbird.afit.af.mil!news From: druck@.afit.af.mil (Dennis W. Ruck) Subject: Spurious DMA Interrupts Message-ID: <1993Jan5.213024.17108@afit.af.mil> Sender: news@afit.af.mil Nntp-Posting-Host: gandalf.afit.af.mil Reply-To: druck@afit.af.mil (Dennis W. Ruck) Organization: Air Force Institute of Technology Date: Tue, 5 Jan 1993 21:30:24 GMT Lines: 63