[9196] in linux-scsi channel archive
Re: Feature in ncr53c8xx/sym53c8xx driver
daemon@ATHENA.MIT.EDU (Miquel van Smoorenburg)
Fri Jul 14 07:55:25 2000
From: miquels@cistron.nl (Miquel van Smoorenburg)
Date: 14 Jul 2000 11:10:42 GMT
Message-ID: <8kmsfi$8t6$1@enterprise.cistron.net>
In-Reply-To: <Pine.LNX.4.10.10007132135290.2177-100000@linux.local>
X-Complaints-To: abuse@cistron.nl
To: linux-scsi@vger.rutgers.edu
In article <cistron.Pine.LNX.4.10.10007132135290.2177-100000@linux.local>,
=?ISO-8859-1?Q?G=E9rard_Roudier?= <groudier@club-internet.fr> wrote:
>Could you please update your sym53c8xx driver version and let me know if
>it makes differences.
I've updated to your latest driver, but I still have the same problem.
I have managed to create a test suite that locks up the system
within one minute of disk activity. What happens is that the
sym chipset stops producing interrupts.
Short description of test setup:
The machine has 5 disks. One the first disk is the OS, on the
four other disks I have created one raid0 partition of 6 GB,
the rest of the disks consist of empty partitions (that can be
used by INN directly). I start a read 4K block - lseek -4096 - write
sequence on each disk on the empty partitions and run a bonnie
on the raid0 ext2 filesystem - lockup.
The only difference is that with the new driver, it seems that it
also polls the chipset every so often through a timer, so throughput
gets dead slow (disk leds blink 1 time/sec) but will keep on "working"-
though sync()ing the cache on this 1 GB RAM machine takes forever.
Value of /proc/interrupts:
% cat /proc/interrupts
CPU0 CPU1
0: 129420 141962 IO-APIC-edge timer
1: 826 950 IO-APIC-edge keyboard
2: 0 0 XT-PIC cascade
4: 7 0 IO-APIC-edge serial
8: 1 0 IO-APIC-edge rtc
10: 41954 47456 IO-APIC-edge sym53c8xx
13: 1 0 XT-PIC fpu
15: 1684 3355 IO-APIC-edge sym53c8xx
19: 595 611 IO-APIC-level eth0
NMI: 0
ERR: 0
Interrupt 10 and 15 don't change anymore.
System is AMI Megarum II, 2xPIII/450, 1GB RAM, onboard dual 53c896.
Mike.
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