Bugs item #1791444, was opened at 2007-09-10 16:43
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: yunfeng (yunfeng)
Assigned to: Nobody/Anonymous (nobody)
Summary: [kvm-37]guest timer 2 times faster than network timer
Initial Comment:
Environment:
------------
HOST (ia32/ia32e/IA64): RHEL5, 2.6.22 kernel
GUEST (ia32/ia32e/IA64): RHEL5
COMMIT: kvm-37
Hardware: Bensley/woodcrest 4 CPUS
Bug detailed description:
--------------------------
On KVM 37, timer of linux guest is very accurate.
On UP linux guest, guest timer is 2 times faster than network timer.
Here is some data of kernel build.
kernelbuild
Network-time 453s
Guest-time 905s
A strange thing is "real != user + sys" in the output of "time (make -j4
bzImage)".
real 910.28
user 73.83
sys 377.03
Reproduce steps:
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