Date: Tue, 21 Oct 2008 14:17:28 -0400 From: Justin Hibbits <jrh29@alumni.cwru.edu> To: Peter Grehan <grehan@freebsd.org> Cc: freebsd-ppc@freebsd.org Subject: Re: graphics on G4 Message-ID: <20081021181727.GC2578@narn.knownspace> In-Reply-To: <20081022015714.EKM92209@dommail.onthenet.com.au> References: <20081022015714.EKM92209@dommail.onthenet.com.au>
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Hi Peter,
On Wed, Oct 22, 2008 at 01:57:14AM +1000, Peter Grehan wrote:
> Hi Justin,
>
> >An oddity I've found with FreeBSD/ppc on my G4 MDD --
> >when I do anything with graphics, after a while the
> >whole machine just hangs when I try to spawn a new
> >process. It's not a deterministic problem, it just
> >happens 'eventually', but nearly 100% of the time it
> >does happen
>
> The framebuffer uses a large chunk of kernel VM when mmap'd.
> Are you able to dump some vm stats while doing this e.g.
> sysctl vm.kvm_free ?
>
> later,
>
> Peter.
There is no vm.kvm_free sysctl on my install. Here are the stats from sysctl
vm.phys_free, vm.vmtotal, and vm.loadavg while running X/windowmaker
vm.phys_free:
FREE LIST 0:
ORDER (SIZE) | NUMBER
| POOL 0 | POOL 1 | POOL 2
-- -- -- -- -- -- -- --
10 ( 4096K) | 0 | 0 | 0
9 ( 2048K) | 0 | 0 | 0
8 ( 1024K) | 0 | 0 | 0
7 ( 512K) | 0 | 0 | 0
6 ( 256K) | 0 | 0 | 0
5 ( 128K) | 0 | 0 | 0
4 ( 64K) | 0 | 0 | 0
3 ( 32K) | 0 | 0 | 0
2 ( 16K) | 0 | 0 | 0
1 ( 8K) | 57 | 0 | 605
0 ( 4K) | 2 | 23 | 13370
vm.vmtotal:
System wide totals computed every five seconds: (values in kilobytes)
===============================================
Processes: (RUNQ: 1 Disk Wait: 0 Page Wait: 0 Sleep: 74)
Virtual Memory: (Total: 1391388K, Active 288188K)
Real Memory: (Total: 142548K Active 130496K)
Shared Virtual Memory: (Total: 53356K Active: 51276K)
Shared Real Memory: (Total: 23100K Active: 22912K)
Free Memory Pages: 58896K
vm.loadavg: { 0.15 0.10 0.07 }
What other stats are relevant?
I neglected to mention before, but it happens even when I exit out of X, or the
program mmap()ing the video card quits. I have a hunch that it's overwriting
some piece of memory needed by the process list.
- Justin
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