Date: Sun, 26 Jan 2003 16:17:13 +0800 From: Greg Lehey <grog@freebsd.org> To: Kris Kennaway <kris@obsecurity.org> Cc: nate <freebsd@aphroland.org>, freebsd-questions@freebsd.org Subject: Re: FreeBSD 5.0-RELEASE in VMware Message-ID: <20030126081713.GF1606@sydney.worldwide.lemis.com> In-Reply-To: <20030126013639.GA16435@rot13.obsecurity.org> References: <000901c2c469$8c9e4cf0$0a00a8c0@michaelslaptop> <38719.10.10.10.7.1043538258.squirrel@webmail.linuxpowered.net> <20030126013639.GA16435@rot13.obsecurity.org>
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On Saturday, 25 January 2003 at 17:36:39 -0800, Kris Kennaway wrote:
> On Sat, Jan 25, 2003 at 03:44:18PM -0800, nate wrote:
>> Michael Ritchie said:
>>> Not sure if this should be in -QUESTIONS or a report to VMware themselves,
>>> but when attempting to run FreeBSD 5 within VMware Workstation 3.2 on a
>>> Windows XP Pro host, the CPU usage sits at 100% -- whether there are any
>>> processes undertaking heavy processing or not. The host PC is a 1.7GHz
>>> P4, with 512MB RAM, so there shouldn't be any problems. It takes about 2
>>> minutes for 'man man' to bring up a page. 4.6.2 and 4.7 both work GREAT,
>>> even in X.
>>>
>>> Any thoughts on why this might be the case??
>>
>> this is symtomatic of the guest OS(freebsd in this case) not having
>> advanced power management features enabled.
>
> No, it's symptomatic of VMWARE emulating a certain CPU opcode (used in
> FreeBSD 5.0 for locking primitives) very inefficiently. See my
> previous response.
Until proof of the contrary, I'd assume its because FreeBSD 5.0 has an
idle process to use up the rest of the CPU time. This is a feature,
not a bug :-) Here's my laptop:
last pid: 1919; load averages: 0.01, 0.02, 0.00 up 0+02:06:58 16:14:52
100 processes: 2 running, 87 sleeping, 11 waiting
CPU states: 0.0% user, 0.0% nice, 0.8% system, 0.0% interrupt, 99.2% idle
Mem: 78M Active, 14M Inact, 17M Wired, 4636K Cache, 22M Buf, 6328K Free
Swap: 512M Total, 5924K Used, 506M Free, 1% Inuse
PID USERNAME PRI NICE SIZE RES STATE TIME WCPU CPU COMMAND
11 root -16 0 0K 12K RUN 124:14 97.56% 97.56% idle
740 grog 96 0 45904K 44356K select 0:34 0.00% 0.00% XFree86
962 grog 96 0 12356K 9920K select 0:23 0.00% 0.00% emacs
Note that the system is 99% idle, but the idle process is using 97% of
CPU time. The discrepancy is due to different ways of smoothing in
the usage calculations. You'll note that the idle process' CPU time
is pretty close to the uptime.
Greg
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