Re: high load, no bottleneck

[manu%netbsd.org@localhost (Emmanuel Dreyfus)]

J. Hannken-Illjes <hannken%eis.cs.tu-bs.de@localhost> wrote:

> What are your clients doing?

MacOS X machines opening sessions kill the server. I can reproduce the
problem with just concurent tar -czf on the NFS volume

> Which vnode(s) are your nfsd threads waiting on (first arg to vn_lock)?

Here is an example:

vn_lock(c5a24b08,2,0,c03a238e,4,c4ce9ed4,6,2ec4bcfb,3d90d5,0) at
netbsd:vn_lock+0x7c

db{0}> show vnode c5a24b08
OBJECT 0xc5a24b08: locked=0, pgops=0xc0b185a8, npages=1720, refs=16

VNODE flags 0x4030<MPSAFE,LOCKSWORK,ONWORKLST>
mp 0xc4a14000 numoutput 0 size 0x6f0000 writesize 0x6f0000
data 0xc5a25d74 writecount 0 holdcnt 2
tag VT_UFS(1) type VREG(1) mount 0xc4a14000 typedata 0xc4fe5480
v_lock 0xc5a24bac

db{0}> show ncache c5a24b08
name .nfs.2005108f.1174
parent user22

After some experiments, it seems -current is much more resistant, I
cannot raise the load to 40 on it.


-- 
Emmanuel Dreyfus
http://hcpnet.free.fr/pubz
manu%netbsd.org@localhost