Messages in this thread |  | | Date | Mon, 17 Sep 2001 14:51:30 -0500 | From | David Fries <> | Subject | Re: how to get cpu_khz? |
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On Mon, Sep 17, 2001 at 03:11:26PM -0400, John Weber wrote: > David Fries wrote: > > > > I'm using the TSC of the Pentium processors to get some precise timing > > delays for writing to a eeprom (bit banging bus operations), and it > > works just fine, but the cpu_khz variable isn't exported to a kernel > > module, so I hardcoded in my module. It works fine for that one > > system, but obviously I don't want to hard code it for the general > > case. I guess I could write my own routine to figure out what the > > cpu_khz is, but it is already done, so how do I get access to it? > > I don't know of any official way of doing this, but here's some > code (written by aa) that accomplishes this.
For a user space program you could just read /proc/cpuinfo, I'm actually writing a kernel driver, maybe I wasn't clear enough. I'm just frustrated because the variable I'm after, cpu_khz is already calculated at boot time (that's where /proc/cpuinfo gets its data) and that variable doesn't appear to be exported to the rest of the kernel, either that or I'm just missing something, which I would rather be the case at this point.
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