Re: Detecting CPU Speed
Re: Detecting CPU Speed
- Subject: Re: Detecting CPU Speed
- From: Gary Pederson <email@hidden>
- Date: Mon, 26 Mar 2007 21:55:59 -0500
The incorrect values are from /usr/sbin/sysctl.
In an earlier email, Daniel Soderberg suggested using the following
command:
system_profiler SPHardwareDataType | grep Speed
I haven't gotten back to those systems to see if it works, but I'll
post the results within a few days.
On Mar 26, 2007, at 11:52 AM, Luke Bellandi wrote:
Gary,
On Mar 24, 2007, at 5:55 PM, Gary Pederson wrote:
I've been detecting CPU speed in my InstallationCheck scripts using
`sysctl -n hw.cpufrequency` and `sysctl -n hw.cpufrequency_max`
These are returning the correct values on most machines, but the
wrong values on other machines (at least 867MHz G4 PowerBooks in
10.3.9) -- So some of our customers get a confusing message about
their CPU being too slow.
On those systems, sysctl returns
hw.cpufrequency: 533333332
hw.cpufrequency_min: 533333332
hw.cpufrequency_max: 533333332
When it should report
hw.cpufrequency: 867000000
hw.cpufrequency_min: 533333332
hw.cpufrequency_max: 867000000
Are these values returned from your Javascript functions in your
distribution, or are they the values returned from /usr/sbin/sysctl?
If they're coming from your Javascript, check what /usr/sbin/sysctl
is returning for that property and let us know if that's correct.
- Luke
Is there a way to accurately detect the maximum cpu speed on all OS
X Macs? Or at least on the ones I need to support (G4, G5, x86 --
10.3.9 and later)?
Thanks,
Gary Pederson
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