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From: dyer@spdcc.COM (Steve Dyer)
Newsgroups: comp.sys.intel,comp.sys.ibm.pc,comp.unix.xenix
Subject: 32-bit memory benchmark results for Inboard 386/AT card
Message-ID: <122@spdcc.COM>
Date: Sun, 21-Jun-87 03:17:15 EDT
Article-I.D.: spdcc.122
Posted: Sun Jun 21 03:17:15 1987
Date-Received: Mon, 22-Jun-87 06:09:26 EDT
Organization: S.P. Dyer Computer Consulting, Cambridge MA
Lines: 39
Summary: reposting & 32-bit memory results; Sun country...
Xref: mnetor comp.sys.intel:273 comp.sys.ibm.pc:4987 comp.unix.xenix:395

This is a reposting of benchmarks of the Intel Inboard 386/AT,
this time with new results on the speed of the board fully loaded
with 32-bit memory.  Earlier results simply reported results using
16-bit memory on the AT bus.  As you can see by the results below,
the difference is quite startling!  Earlier results indicated a
ratio of 1.7/1 in average CPU speed -- with the 32-bit memory expansion,
this has increased to better than 2.6/1 compared with a stock 8mhz AT.
At least from the Dhrystone benchmarks reported below, we're beginning
to edge into Sun 3 territory...

---------------------------------------

All tests were run on the same hardware and software environment,
with the exception of the replacement of the 286 for the 386 card,
under SCO XENIX 286 OS v. 2.1.3 with Development System v. 2.1.4.
Note that this is a test of the execution speed of 286 16-bit instructions.
The Inboard used in this test has no memory of its own other than its cache.

		IBM PC/AT 8mhz		IBM PC/AT with Intel Inboard 386/AT
					at 16mhz, cache enabled

					16-bit mem	32-bit mem

Drystone 1.0	no reg	reg		no reg	reg	no reg	reg
		1278	1292		2293	2304	3429	3405
Drystone 1.1	1084	1094		1957	1963	2906	2893

Buchholz (sum of user & sys times in sec)

short cpu	0.3			0.2		0.1
medium cpu	3.3			1.9		1.2
long cpu	***			*** (values out of range)
short I/O	0.9			0.6		0.4
I/O bound	3.1			1.9		1.4
long mixed	56.9			33.8		21.8
-- 
Steve Dyer
dyer@harvard.harvard.edu
dyer@spdcc.COM aka {ihnp4,harvard,linus,ima,bbn,m2c}!spdcc!dyer