Messages in this thread | | | Date | Thu, 07 Sep 2000 22:21:03 +0000 | From | Marc Mutz <> |
| |
Hi out there!
I was really impressed when I first started to copy 1000 mails from my linux-kernel mail folder to the archive/linux-kernel folder in netscape. While under 2.2.16 it you could count the along with the first dozen messages being transferred, 2.2.17 lets netscape do a jump start and reduces the time needed to move 1000 messages out of a folder with 2000 to - not measured - one fourth.
The netscape mail folders reside inside an loopback-blowfish-encrypted filesystem (astors patch) of just under 2G in size that is itself located on a 3x1.5 raid5-array (mingos patch).
Impressed that I was I ran my 'swapping test': select some jpgs in the kde file manager and let them be shown by kview. KFM is dumb so it starts an instance of kview for every file that I selected, which in results in excessive memory pressure.
I then noticed pauses of up to one minute when the system seemed dead. I then cleared the buffer cache using a huge jpg and patch-2.2.17 and patch-2.4.0-test2 each displayed in a separate netscape window and restarted the test with vmstat 1 in the background. The first two vmstat traces are with vmstst at nice 0, the third is with vmstat at nice -19.
The overall feeling I have of 2.2.17 vs 2.2.16 VM after half a day of laying with it is that 2.2.16 remains responsive [1] under high loads (with which I do not mean my swap test) whereas 2.2.17 becomes jumpy, like working over a slow network. But then 2.2.17 increases the performance of some operations dramatically. I don't know which I find better. I think that 2.2.17 is far better than 2.2.16 when the load is normal, but I'm afarid that maybe a background kernel compile will lead to a jumpy mouse - will try that later.
Attached please find the vmstat outputs of the three tests I carried out, where the first one seems to match the behaviour of 2.2.16 quite closely.
My System:
K2-2 500, 128M, SuSE 6.0. What has changed: kernel: 2.2.16 applied patches: patch-int-2.2.16.2, raid-2.2.16-A0 kernel: 2.2.17 applied patches: patch-int-2.2.16.9, raid-2.2.17-A0 (rejects by hand)
Marc
-- Marc Mutz <Marc@Mutz.com> http://marc.mutz.com/Encryption-HOWTO/ University of Bielefeld, Dep. of Mathematics / Dep. of Physics
PGP-keyID's: 0xd46ce9ab (RSA), 0x7ae55b9e (DSS/DH) [unhandled content-type:application/x-gzip][unhandled content-type:application/x-gzip][unhandled content-type:application/x-gzip] | |