2.6.18-rc1-git5-64-smp cpufreq ondemand governor problem on SMP DUALCORE AMD
64bit system
- start 2 processes with infinite loop in each - OK both cores 100%
utilization cpu speed max
- kill one - BAD now one core utilization ~100% but cpu speed dropped to
core with lowest utilization - fluctuating from min at this level depending
on system activity.
any possibility to setup ondemand governor for max speed if only 1 core
utilization is maxed - full speed for single-process/single-thread activity
?
looks like cpufreq ondemand governor sets two frequency dependent cores to
speed level ok for that one with lowest utilization slowing down
process/thread working on other core. For now it is ok for independent
multiprocessor bad for multicore-freq-dependent.
xboom
[email protected]
(observe cpu-freq and utilization
terminal-1: awk 'BEGIN {for(i=0;i<100000;i++)for(j=0;j<10000;j++);}'
terminal-2: awk 'BEGIN {for(i=0;i<100000;i++)for(j=0;j<10000;j++);}'
kill one awk)
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