[ltp] T40 cpufreq

18 Aug 2003 09:08:21 -0700

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On Sat, 2003-08-16 at 14:18, mukesh agrawal wrote:

> I think /proc/cpuinfo just reports what was detected at boot time.
> 

Not anymore..  On my T40 w/ SuSE 8.2 (ships with patched 2.4.20 kernel):

# cat /proc/cpuinfo  | sed -n "/cpu MHz\|bogo/p"
cpu MHz         : 1598.665
bogomips        : 3191.60

# cat /proc/cpufreq
          minimum CPU frequency  -  maximum CPU frequency  -  policy
CPU  0       199833 kHz ( 12 %)  -    1598665 kHz (100 %)  - 
performance

# echo "0%40%100%powersave" > /proc/cpufreq

cat /proc/cpuinfo  | sed -n "/cpu MHz\|bogo/p"
cpu MHz         : 799.332
bogomips        : 1595.80

# cat /proc/cpufreq
          minimum CPU frequency  -  maximum CPU frequency  -  policy
CPU  0       639466 kHz ( 40 %)  -    1598665 kHz (100 %)  -  powersave

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On Sat, 2003-08-16 at 14:18, mukesh agrawal wrote:
<BLOCKQUOTE TYPE=CITE>
<PRE><FONT COLOR="#68151e"><I>I think /proc/cpuinfo just reports what was detected at boot time.
</I></FONT></PRE>
</BLOCKQUOTE>
<BR>
Not anymore..&nbsp; On my T40 w/ SuSE 8.2 (ships with patched 2.4.20 kernel):<BR>
<BR>
# cat /proc/cpuinfo&nbsp; | sed -n &quot;/cpu MHz\|bogo/p&quot;<BR>
cpu MHz&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : 1598.665<BR>
bogomips&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : 3191.60<BR>
<BR>
# cat /proc/cpufreq<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; minimum CPU frequency&nbsp; -&nbsp; maximum CPU frequency&nbsp; -&nbsp; policy<BR>
CPU&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 199833 kHz ( 12 %)&nbsp; -&nbsp;&nbsp;&nbsp; 1598665 kHz (100 %)&nbsp; -&nbsp; performance<BR>
<BR>
# echo &quot;0%40%100%powersave&quot; &gt; /proc/cpufreq<BR>
<BR>
cat /proc/cpuinfo&nbsp; | sed -n &quot;/cpu MHz\|bogo/p&quot;<BR>
cpu MHz&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : 799.332<BR>
bogomips&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : 1595.80<BR>
<BR>
# cat /proc/cpufreq<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; minimum CPU frequency&nbsp; -&nbsp; maximum CPU frequency&nbsp; -&nbsp; policy<BR>
CPU&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 639466 kHz ( 40 %)&nbsp; -&nbsp;&nbsp;&nbsp; 1598665 kHz (100 %)&nbsp; -&nbsp; powersave<BR>
<BR>
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