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Date: Sat, 25 Apr 2009 17:27:45 -0700
From: Yuri <yuri@rawbw.com>
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Subject: Why top never shows ~100% CPU usage with heavy load?
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When I have 2-3 compilation processes running entirely in memory and an 
empty cycle (for (;;) {}) I only see 6-20% CPU load of each process.
Total that 'top -C' never even approaches 100% that it actually should 
be and is usually ~40%.
'load averages' field though becomes high: over 3.

Why CPU load never goes to 100%?

Yuri

7.1-STABLE