On Fri, 27 Aug 2010, Justin Piszcz wrote:
Hi,
Current theory:
Mobo: Intel DP55KG
I had this:
#append="3w-9xxx.use_msi=1 reboot=a snd_hda_intel.enable_msi=1"
Now I am no longer using MSI for the 3ware driver, so far, the 'lag' /
controller reset problem has not occurred yet:
append="reboot=a snd_hda_intel.enable_msi=1"
I wish both cards did not use the same IRQ, however, if this solves the problem
then I'll be happy.
From /proc/interrupts:
16: 44899 0 0 0 0 0 12418 0 IO-APIC-fasteoi 3w-9xxx, 3w-9xxx, ehci_hcd:usb1
So far I'm typing this e-mail on the client and I do not see any lag at this
time, it appears this has fixed my problem, I'll give it a few more hours/days
before I consider it 'fixed' but after changing all of the settings in 3dm2
and replacing/removing the BBUs, noticing no change, it appears to be an
interrupt problem when the 3ware cards are used with MSI on my motherboard.
Are there cases in which MSI should/should not be used? Generally I have it on
for all of my devices but perhaps the 3ware cards don't play well with it
on the Intel motherboard?
I am guessing the 'lag' issue causes the controller to reset when there is
too much I/O launched via cron (backups and such)..
We'll see if it happens again, I did briefly try the newest Beta firmware
as LSI recommended made no difference in terms of the lag issue.
I am still running with 'nobarrier' removed and have not gotten any controller
resets yet, but I had the lag issue as mentioned above until I removed the
MSI option from the 3w-9xxx driver.
Before removal of MSI option:
Drive Performance Monitor Configuration for /c1 ...
Performance Monitor: ON
Version: 1
Max commands for averaging: 100
Max latency commands to save: 10
Requested data: Instantaneous Drive Statistics
Queue Xfer Resp
Port Status Unit Depth IOPs Rate(MB/s) Time(ms)
------------------------------------------------------------------------
p0 OK u0 1 123 1.202 730148
p1 OK u0 1 123 1.203 644249
p2 OK u1 1 7 0.000 132
p3 NOT-PRESENT - - - - -
After removal:
Drive Performance Monitor Configuration for /c1 ...
Performance Monitor: ON
Version: 1
Max commands for averaging: 100
Max latency commands to save: 10
Requested data: Instantaneous Drive Statistics
Queue Xfer Resp
Port Status Unit Depth IOPs Rate(MB/s) Time(ms)
------------------------------------------------------------------------
p0 OK u0 1 53 3.124 85900
p1 OK u0 1 53 3.124 85900
p2 OK u1 0 0 0.000 0
p3 NOT-PRESENT - - - - -
..
This is what the problem looks like (sdb=root) as it happened twice (before
removal of the MSI option, I've not been able to reproduce it with the MSI
option disabled).
$ (output form dstat)
-dsk/total----dsk/sda-----dsk/sdb--
read writ: read writ: read writ
0 6884k: 0 0 : 0 6884k
0 4580k: 0 0 : 0 4580k
0 4728k: 0 0 : 0 4728k
0 3936k: 0 0 : 0 3936k
0 5764k: 0 0 : 0 5764k
0 1292k: 0 0 : 0 1292k
0 7760k: 0 0 : 0 7760k
0 5480k: 0 0 : 0 5480k
0 7408k: 0 0 : 0 7408k
0 5040k: 0 0 : 0 5040k
0 6236k: 0 0 : 0 6236k
0 788k: 0 0 : 0 788k
0 0 : 0 0 : 0 0
0 2900k: 0 0 : 0 2900k
0 8160k: 0 0 : 0 8160k
4096B 7916k: 0 0 :4096B 7916k
0 7812k: 0 0 : 0 7812k
0 4804k: 0 0 : 0 4804k
148k 7268k: 0 0 : 148k 7268k
0 888k: 0 0 : 0 888k
0 7688k: 0 0 : 0 7688k
0 7644k: 0 0 : 0 7644k
0 6352k: 0 0 : 0 6352k
-dsk/total----dsk/sda-----dsk/sdb--
read writ: read writ: read writ
0 5324k: 0 0 : 0 5324k
0 1432k: 0 0 : 0 1432k
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
-dsk/total----dsk/sda-----dsk/sdb--
read writ: read writ: read writ
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0 dddddddddd
0 8700k: 0 0 : 0 8700k
0 2076k: 0 0 : 0 2076k
0 5428k: 0 0 : 0 5428k
0 7984k: 0 0 : 0 7984k
0 8236k: 0 0 : 0 8236k
0 2536k: 0 0 : 0 2536k
0 232k: 0 0 : 0 232k
0 268k: 0 0 : 0 268k
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 508k: 0 0 : 0 508k
0 72k: 0 0 : 0 72k
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
4096B 232k: 0 0 :4096B 232k
344k 2380k: 0 0 : 344k 2380k
0 1172k: 0 0 : 0 1172k
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0
0 0 : 0 0 : 0 0 ^C^C^C
$
Justin.
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