Date: Tue, 10 Jan 1995 19:58:21 +0800 (SST) From: SysAdmin - Ng Pheng Siong <lsys@np.ac.sg> To: hackers@FreeBSD.org Cc: lsys@np.ac.sg (SysAdmin) Subject: Filesystem(?) preformance - 1.x and 2.0 Message-ID: <199501101201.EAA10332@freefall.cdrom.com>
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Hi.
Didn't see any response to a previous post, so I'll try again. Hopefully
someone can clue me in.
I have 1.x unpatched-final-current and 2.0R (2.1.0 kernel supped on
4th/5th Dec) running on identical hardware alongside each other.
Somehow, the 2.0 system feels slower. Iozone reports thusly:
== 2.0 ==
Writing the 10 Megabyte file, 'iozone.tmp'...27.835938 seconds
Reading the file...20.015625 seconds
IOZONE performance measurements:
376698 bytes/second for writing the file
523878 bytes/second for reading the file
== 1.x ==
Writing the 10 Megabyte file, 'iozone.tmp'...25.150000 seconds
Reading the file...43.716667 seconds
IOZONE performance measurements:
416928 bytes/second for writing the file
239857 bytes/second for reading the file
Kdumping `ktrace -d -i man logger' gives:
== 2.0 == 49.51 real 11.08 user 10.24 sys
== 1.x == 34.92 real 3.06 user 4.10 sys
Redirecting output of kdump (`time kdump >/dev/null'):
== 2.0 == 9.90 real 9.54 user 0.21 sys
== 1.x == 2.02 real 1.92 user 0.10 sys
Timing `man csh':
== 2.0 == 238.78 real 204.62 user 29.36 sys
== 1.x == 66.37 real 53.04 user 10.39 sys
Both machines have lean kernels, differences are that the 2.0 one has
LKM, MULTICAST and MROUTING. Both are under my charge and have nothing
much running on them. The 2.0 box took over Sendmail duties from the
1.x box yesterday, and is also intended to be our site's mrouter to
the Mbone.
Appreciate any hints on where to start looking. Thanx!
- PS
--
Ng Pheng Siong * lsys@np.ac.sg * ngps@np.ac.sg
Computer Centre, Ngee Ann Polytechnic, Singapore
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