Messages in this thread | | | Date | Sat, 13 Nov 1999 20:11:22 +0100 | From | Pavel Machek <> | Subject | Re: [Patch] shm bug introduced with pagecache in 2.3.11 |
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Hi, Gerard!
> Could it be possible for you to run benchmarks against O/Ses we have > access to the source code instead of binary-only available ones. This > would allow to learn a lot better from the differences. For example > FreeBSD is as simple as Redhat to install and a base system will consume > far less disk space than NT.
It is ok. He's not trying to do NT-vs-linux war, he tries to show Linus that we have performance problems. And he did exactly that.
[Linus said serializing (some kind of operation) does not matter. These results show that they _do_ matter. No need for installing BSD.]
Pavel
> > Ok, I switched to a Seagate ST34520N (7200 rpm, scsi2 narrow, 4.5 GB), > > and I added a new test: Linux-multi-thread vs Linux-multi-process. The > > results are as I expected: > > > > -Linux-multi-process is more or less on par with NT. The 20% difference > > could be the thread/process overhead. > > -Linux-multi-thread is sloww. > > > > 450000 pages test file, ext2 and NTFS, 128 MB ram, Sym810 controller, > > AMD K6/200 > > > > # is the number of threads/processes which are running. > > > > # Linux-threads Linux-processes NT (threads) > > 1 51 51 60 > > 16 51 67 96 > > 64 50 73 105 > > 128 48 75 107 > > > > The modified source code is at > > http://colorfullife.com/~manfreds/pagein/pagein.cpp
-- I'm really pavel@ucw.cz. Look at http://195.113.31.123/~pavel. Pavel Hi! I'm a .signature virus! Copy me into your ~/.signature, please!
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