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- From: dmuntz@quip.eecs.umich.edu (Dan Muntz)
- Newsgroups: comp.unix.bsd
- Subject: [386BSD] processor caching effect on kernel build
- Message-ID: <1993Jan27.205537.18117@zip.eecs.umich.edu>
- Date: 27 Jan 93 20:55:37 GMT
- Sender: news@zip.eecs.umich.edu (Mr. News)
- Organization: University of Michigan EECS Dept., Ann Arbor, MI
- Lines: 36
-
-
- People have been wondering about how the internal and external caches
- affect performance under 386bsd. Here are some numbers I got doing kernel
- builds.
-
- System:
- 486DX50 (8k internal cache) EISA
- 16mb 80ns (4 4Mx9 simms)
- Adaptec 1542B (ISA) scsi
- Micropolis 1528 scsi disk
- 256k 20ns external cache
- 64mb swap (whatever portion of 64mb 386bsd is capable of using)
- gcc version 1.39
-
- both caches disabled:
- make depend: 05:38.13
- make: 28:51.15
-
- external cache enabled, internal disabled:
- make depend: 05:37.53
- make: 28:49.88
-
- internal cache enabled, external disabled:
- make depend: 01:35.66
- make: 07:49.75
-
- both caches enabled:
- make depend: 01:25.28
- make: 06:10.84
-
- Kernel being built is 0.1 + patchkit0.2 + julian's scsi + pcfs + minor patches
- Running kernel is the same (and contains NONOP patch recently posted).
- You've just got to love 7:36 for building a kernel from scratch :)
-
- -Dan
- dmuntz@eecs.umich.edu
-