Date: Mon, 18 Dec 1995 13:52:58 -0700 (MST) From: Terry Lambert <terry@lambert.org> To: dyson@freefall.freebsd.org (John Dyson) Cc: jgreco@brasil.moneng.mei.com, current@FreeBSD.org Subject: Re: ISP state their FreeBSD concerns Message-ID: <199512182052.NAA12329@phaeton.artisoft.com> In-Reply-To: <199512180515.VAA02759@freefall.freebsd.org> from "John Dyson" at Dec 17, 95 09:15:47 pm
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> > I have a little suite of programs I use for performance testing. The tests > > are absolutely slanted towards news server type applications. The one in > > particular I will quote is "small-file-write.c", a program that writes 10000 > > files in subdirectories, creating the subdirectories if needed (much like a > > news server would do). So the "first run" numbers include the time needed > > to make dirs: This is, I think, atypical of most common usage (72% of common usage according to Novell is "Read", 20% is "Write", and 8% is "everything else", including lookups, creates, deletes, etc.). > > Slowaris 5.4 - SS10/30 - 64MB RAM (SCSI II, reasonable drive) > > > > 10000 files in 332 seconds - first run > > 10000 files in 20 !!! seconds - second run [ ... ] > > FreeBSD 2.0.5R - ASUS SP3G AMD 486DX2/66 + NCR810 - 8MB (SCSI II, reasonable > > drive) > > > > 10000 files in 620 seconds - first run :-( :-( > > 10000 files in 310 seconds - second run :-( :-( :-( !! > > > > FreeBSD 1026-SNAP - ASUS SP3G AMD 486DX4/100 + NCR810 - 48MB (SCSI II, SLOW > > drive, fs mounted -o async) > > > > 10000 files in 569 seconds - first run :-( :-( > > 10000 files in 207 seconds - second run :-( :-( :-( !! The "second run" numbers are to be expected. As I recently pointed out, the cache_enter() call is not made on the CREATE nameiop if the file did not already exist. So you are getting 0 cache hits on terminal components. Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers.
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