From mboxrd@z Thu Jan 1 00:00:00 1970 From: Oleg Drokin Subject: Re: reiser4 and 2.5.60 Date: Tue, 18 Feb 2003 13:05:44 +0300 Message-ID: <20030218130544.A31947@namesys.com> References: <20030215160033.A3570@humilis> <20030218121257.A27125@namesys.com> <20030218103151.B19634@humilis> <20030218124236.A31148@namesys.com> <20030218105247.D20771@humilis> Mime-Version: 1.0 Return-path: list-help: list-unsubscribe: list-post: Errors-To: flx@namesys.com Content-Disposition: inline In-Reply-To: <20030218105247.D20771@humilis> List-Id: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Ookhoi Cc: reiserfs-list@namesys.com Hello! On Tue, Feb 18, 2003 at 10:52:47AM +0100, Ookhoi wrote: > > On Tue, Feb 18, 2003 at 10:31:51AM +0100, Ookhoi wrote: > > > Sure. It is a P-MMX, 200MHz, with 512MB ram, and a 4GB scsi disk. > > Hm. That must be real slow, is it? (just because not all of the RAM is > > covered by L2 cache, I mean. Or do you have some sensible chipset in > > there?). > It is slow, but I am not aware of issues with too little L2 cache. A Well, some common chipsets of that time could only cache limited amounts of RAM (64Mb for TX or VX chipsets, 256Mb for some other chipsets I dont remember about). Accesses to RAM regions that are not cached are awfully slow. But these accesses are still faster than hitting HDD ;) So the "slram" driver was developed that allowed to use non-cached memory as a RAM-disk for swap usage. > quick look at dmesg didn't give me more clue. Can you please explain a > bit, or give some google keywords? There is some sensible (from a quick look) article at http://www.computerwriter.com/archives/1998/cw050798.htm > It is only 200MHz, so I expect it to be slow, but if I can make it > faster that would be nice (without removing the ram if possible ;-) Well, try to remove the ram, first to make it to be only 256M then 64M and see if the system becomes faster at trivial non-memory hungry stuff. If this is indeed the case, consider changing motherboard/increasing L2 cache size (hard to do nowadays, when you cannot buy even P3 equipment easily ;) ). Nothing else comes to mind. > > Because it is already perfect, nothing to improve ;) > Goody :-) Well, let me know if you want me to test something. I'll let > you know what happens with reiser4 on a partition. Thank you. Bye, Oleg