Host reports high virtualbox CPU for first few hours (guest reports 0% cpu load)

[Licho]

Every time i start vbox machine, its cpu usage is high (about 1/2 of one core) for 30 minutes to 3 hours. Meanwhile guest reports 0% CPU usage.

This happens only if vt-x is disabled and both on linux and windows hosts. Tried virtual box 1.5 on windows and 2.1 on ubuntu.

Problem seems to fix itself at this moment: 00:21:03.284 PATM: Stop monitoring IDT handler pages at 82baa72c - invalid write 82baa40c-82baa410 (this is not a fatal error)

[Licho]

Hmm its not so simple, sometimes it starts using cpu again. And (might be unrelated) after several hours guest machine suffers from periodic cpu "lags" in about 1s interval - say you scroll something there are brief pauses about every 1s. Its not a network.

[Licho]

Ignore my previous post those 2 issues were unrelated.

[林鸿安]

if start more then 2(include 2) vbox machines at the same time, the cpu usage will become to nomal. so i create a "empty" machine with 4m memory,no hdd ...