On Thu, Mar 10, 2005 at 10:24:22AM +1100, Simon Burge wrote:
> Just for kicks, here's some times with a -current kernel from sources
> around March 7th.  This is a trimmed down kernel with no IPV6,
> filesystems I don't use, etc (same as the above 2.0F benchmarks).  When
> the kernel boots, I see:
> 
> 	NetBSD 2.99.16 (PC532) #65: Thu Mar 10 08:36:15 EST 2005
> 	total memory = 8192 KB
> 	avail memory = 6992 KB
> 
> time (real)                  vm.bufmem_hiwater vm.{anon,exec,file}{min,max}
> 7:44.74 43.3%   0+0k 101+39io 44309pf+1w  524288  {{10,95},{ 5,30},{10,50}}
> 4:43.54 43.3%   0+0k   5+26io 17627pf+1w  524288  {{10,95},{ 5,10},{ 5,15}}
> 2:53.01 53.1%   0+0k   4+24io  7883pf+1w  131072  {{10,95},{ 5,10},{ 5,15}}
> 2:14.59 60.2%   0+0k   4+24io  4552pf+1w  131072  {{10,95},{ 5,10},{ 0, 5}}
> 1:56.30 65.7%   0+0k   4+24io  3404pf+1w  131072  {{10,95},{ 5,10},{ 0, 1}}
> 1:54.14 66.5%   0+0k   4+24io  3261pf+1w  131072  {{10,95},{ 0,10},{ 0, 1}}
> 1:51.39 67.9%   0+0k   4+23io  3209pf+1w  131072  {{10,80},{ 0,10},{ 0, 1}}
> 
> Note that the user time component of was a relatively constant 60 to 61
> seconds, and system time was 139 seconds in the first down to 15 seconds
> in the last test.
> 
> Compare those times with a trimmed down kernel against a GENERIC kernel
> (6284 KB free at boot) for the vm tunables with the fastest time above.
> 
> time (real)                  vm.bufmem_hiwater vm.{anon,exec,file}{min,max}
> 8:55.57 44.2%  0+0k 3+24io 52780pf+1w  131072  {{10,80},{ 0,10},{ 0, 1}}
> 
> And then compare that with a 1.5X GENERIC kernel (6220KB free):
> 
> 55.189u  20.468s  2:06.78 59.6% 0+0k 71+63io  5364pf+0w


so basically, the extra ~700k makes a huge difference.  this benchmark just
barely fits in memory.  I doubt there are any sysctl settings that would
allow a GENERIC -current kernel to get a 2 minute run.

-Chuck