Re: mmap()/VM problem in 2.4.0

2001-01-21 Thread Marcelo Tosatti
On Fri, 19 Jan 2001, Rik van Riel wrote: > On Thu, 18 Jan 2001, Marcelo Tosatti wrote: > > On Thu, 18 Jan 2001, Rik van Riel wrote: > > > On Fri, 12 Jan 2001, Vlad Bolkhovitine wrote: > > > > > > > You can see, mmap() read performance dropped significantly as > > > > well as read() one raised. P

Re: mmap()/VM problem in 2.4.0

2001-01-18 Thread Rik van Riel
On Thu, 18 Jan 2001, Marcelo Tosatti wrote: > On Thu, 18 Jan 2001, Rik van Riel wrote: > > On Fri, 12 Jan 2001, Vlad Bolkhovitine wrote: > > > > > You can see, mmap() read performance dropped significantly as > > > well as read() one raised. Plus, "interactivity" of 2.4.0 system > > > was much wor

Re: mmap()/VM problem in 2.4.0

2001-01-18 Thread Marcelo Tosatti
On Thu, 18 Jan 2001, Rik van Riel wrote: > On Fri, 12 Jan 2001, Vlad Bolkhovitine wrote: > > > You can see, mmap() read performance dropped significantly as > > well as read() one raised. Plus, "interactivity" of 2.4.0 system > > was much worse during mmap'ed test, than using read() > > (every

Re: mmap()/VM problem in 2.4.0

2001-01-17 Thread Rik van Riel
On Fri, 12 Jan 2001, Vlad Bolkhovitine wrote: > You can see, mmap() read performance dropped significantly as > well as read() one raised. Plus, "interactivity" of 2.4.0 system > was much worse during mmap'ed test, than using read() > (everything was quite smooth here). 2.4.0-test7 was badly > in

Re: mmap()/VM problem in 2.4.0

2001-01-14 Thread Marcelo Tosatti
On Fri, 12 Jan 2001, Vlad Bolkhovitine wrote: > After upgrade from 2.4.0-test7 to 2.4.0 while running tiotest v0.3.1 I found two > following problems. There have been quite a lot of things changed from 2.4.0-test7 to 2.4.0, so I'm not sure what caused the slowdown. Anyway, important VM change

Re: mmap()/VM problem in 2.4.0

2001-01-14 Thread Vlad Bolkhovitine
Tiotest/tiobench a new disk benchmark program written by a group of people led by Mika Kuoppala. AFAIK, it is the only disk IO test, which is able to use mmap(). You can find it on http://tiobench.sourceforge.net/ or http://www.icon.fi/~mak/tiotest/tiobench-0.3.1.tar.gz. Regards, Vlad Ray Bryan

mmap()/VM problem in 2.4.0

2001-01-12 Thread Vlad Bolkhovitine
After upgrade from 2.4.0-test7 to 2.4.0 while running tiotest v0.3.1 I found two following problems. 1. Tiotest is compiled for mmap() usage and there is no swap on the system with ~200Mb free memory. Tiotest tries to create mmap'ed file with size ~memory_size*2 and soon after start gets killed