lug-bg: Kernel-i i disk I/O
- Subject: lug-bg: Kernel-i i disk I/O
- From: boukov@xxxxxxxxxxx (Petko Boukov)
- Date: Wed, 15 Dec 1999 00:21:46 -0800
Ne se bjah vglezhdal v tochnite chisla, ama snoshti go napravih, i eto kakvo se poluchi:
(Njamam pod ryka kompiliran 2.2.13, ama edva li shte ima razliki s 2.2.12-20.)
2.2.12-20
/dev/hda:
Timing buffer-cache reads: 128 MB in 2.94 seconds =43.54 MB/sec
Timing buffered disk reads: 64 MB in 28.14 seconds = 2.27 MB/sec
2.3.32
/dev/hda:
Timing buffer-cache reads: 128 MB in 3.15 seconds =40.63 MB/sec
Timing buffered disk reads: 64 MB in 5.65 seconds =11.33 MB/sec
Pyrvoto chislo neizvestno zashto namaljava, ama to i bez tova ne e tolkova vazhno, ponezhe pokazva skotostta na obmen mezhdu cache pametta na diska i osnovnata pamet. Vtoroto chislo e realno chetene ot diska, a to dava petkratno(!) uskorenie.
I dvata testa sa bez namesa s hdparm. Diskyt mi e 10 GB Quantum, procesoryt - edva Cel. 300A, a dynoto e vyzmozhno naj-evtindzhanskoto - BX Pro na SiS.
Chetoh, che sa smenili shemata za cache-irane v novija kernel, ama javno ne e samo tova; imal sym kysmeta njakoj dobre da se potrudi nad moja chipset.
Ako njakoj se zapali da kupuva takova dyno da znae, che vgradenijat AGP VCC 8 MB 6326, X Server-a mu poddurzha samo 4 MB ot pametta. Osven tova raboti s accel, kakto i s 16 bpp, ama v 1024x768 ne mozhe da gi osyvmesti i se nalaga ili da se mine na 256 cvjata, ili da se zadade Option "no_accel", koeto malko zabavja mesteneto na dzhamovete. Ne e bolka za umirachka, ama vse pak drazni.
Petko
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