Date: Wed, 30 Jan 2008 21:42:16 -0000 From: "Steven Hartland" <killing@multiplay.co.uk> To: <freebsd-performance@freebsd.org>, "Ivan Voras" <ivoras@freebsd.org> Cc: freebsd-stable@freebsd.org Subject: Re: newfs locks entire machine for 20seconds Message-ID: <008201c86388$fd159010$b6db87d4@multiplay.co.uk> References: <030401c862a0$23918d50$b6db87d4@multiplay.co.uk> <fnq4fp$m54$1@ger.gmane.org>
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----- Original Message -----
From: "Ivan Voras" <ivoras@freebsd.org>
>> The machine is running with ULE on 7.0 as mention using an Areca 1220
>> controller over 8 disks in RAID 6 + Hotspare.
>
> I'd suggest you first try to reproduce the stall without ULE, while
> keeping all other parameters exactly the same.
Ok tried with an updated 7 world / kernel as of this afternoon and with 4BSD
instead of ULE and no difference the machine still locks up with no activity
for anywhere from 20 to 30 seconds.
Here's a snapshot from top under cpu and io modes when the stall has occured
[top]
last pid: 1102; load averages: 0.02, 0.08, 0.07 up 0+00:09:37 21:39:13
162 processes: 4 running, 145 sleeping, 13 waiting
CPU states: 0.0% user, 0.0% nice, 0.4% system, 0.0% interrupt, 99.6% idle
Mem: 60M Active, 19M Inact, 54M Wired, 56K Cache, 27M Buf, 3809M Free
Swap: 4096M Total, 4096M Free
PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND
12 root 1 171 ki31 0K 16K RUN 0 8:59 97.90% idle: cpu0
11 root 1 171 ki31 0K 16K RUN 1 8:57 95.80% idle: cpu1
1102 root 1 -8 0 4752K 1256K physrd 1 0:01 19.64% newfs
4 root 1 -8 - 0K 16K - 0 0:00 0.10% g_down
1048 root 1 96 0 7656K 2544K CPU0 0 0:01 0.00% top
1054 root 1 96 0 7656K 2348K CPU1 1 0:01 0.00% top
863 root 1 96 0 131M 15768K select 0 0:00 0.00% httpd
1055 root 1 96 0 32928K 4656K select 0 0:00 0.00% sshd
last pid: 1102; load averages: 0.02, 0.08, 0.07 up 0+00:09:37 21:39:13
162 processes: 4 running, 145 sleeping, 13 waiting
CPU states: 0.0% user, 0.0% nice, 0.4% system, 0.0% interrupt, 99.6% idle
Mem: 60M Active, 19M Inact, 54M Wired, 56K Cache, 27M Buf, 3809M Free
Swap: 4096M Total, 4096M Free
PID USERNAME VCSW IVCSW READ WRITE FAULT TOTAL PERCENT COMMAND
12 root 9 154 0 0 0 0 0.00% idle: cpu0
11 root 28 5 0 0 0 0 0.00% idle: cpu1
1102 root 5 0 0 0 0 0 0.00% newfs
4 root 14 0 0 0 0 0 0.00% g_down
1048 root 1 0 0 0 0 0 0.00% top
1054 root 1 0 0 0 0 0 0.00% top
863 root 1 0 0 0 0 0 0.00% httpd
[/top]
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