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Date:      Thu, 29 Nov 2001 00:07:18 +0900
From:      Makoto Matsushita <matusita@jp.freebsd.org>
To:        hackers@FreeBSD.ORG
Subject:   Re: FreeBSD on vmware
Message-ID:  <20011129000718I.matusita@jp.FreeBSD.org>
In-Reply-To: <200111132339.aa29506@salmon.maths.tcd.ie>
References:  <20011113165944.G52323-100000@fledge.watson.org> <200111132339.aa29506@salmon.maths.tcd.ie>
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iedowse> Someone mentioned on a list somewhere that vmware takes forever to
iedowse> emulate the cmpxchg instruction, and that using the I386_CPU version
iedowse> of atomic_cmpset_int() helps a lot.

I really know I'm doing a stupid thing, but here is benchmark results
of both "plain" and "patched" 5-current (as of Nov/26/2001).  Patched
FreeBSD is about 10% faster than before.

*** Before:

TEST                                        BASELINE     RESULT      INDEX

Arithmetic Test (type = double)               2541.7   156596.8       61.6
Dhrystone 2 without register variables       22366.3  1214131.7       54.3
Execl Throughput Test                           16.5       25.1        1.5
File Copy  (30 seconds)                        179.0     1684.0        9.4
Pipe-based Context Switching Test             1318.5      710.9        0.5
Shell scripts (8 concurrent)                     4.0        7.0        1.8
                                                                 =========
     SUM of  6 items                                                 129.1
     AVERAGE                                                          21.5


*** After:

TEST                                        BASELINE     RESULT      INDEX

Arithmetic Test (type = double)               2541.7   167038.3       65.7
Dhrystone 2 without register variables       22366.3  1267100.0       56.7
Execl Throughput Test                           16.5       45.0        2.7
File Copy  (30 seconds)                        179.0     2863.0       16.0
Pipe-based Context Switching Test             1318.5     1372.6        1.0
Shell scripts (8 concurrent)                     4.0       12.5        3.1
                                                                 =========
     SUM of  6 items                                                 145.3
     AVERAGE                                                          24.2


***

Note that both are tested with:
	- Same kernel configuration (but not GENERIC kernel)
	- VMware Workstation 3.0.0 build 1455, WindowsXP Pro host
	- 96MB RAM for FreeBSD guest OS
	- 1.9GB Virtual Disk is on ATA66 HDD of host PC.
	- Host PC has one Pentium3 850Mhz CPU

-- -
Makoto `MAR' Matsushita

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