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[Xen-bugs] [Bug 537] Xen0 bogomips has a lot of differences with Native

To: xen-bugs@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-bugs] [Bug 537] Xen0 bogomips has a lot of differences with Native Linux.
From: bugzilla-daemon@xxxxxxxxxxxxxxxxxxx
Date: Mon, 20 Feb 2006 13:22:17 +0000
Delivery-date: Mon, 20 Feb 2006 13:47:42 +0000
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vincent.hanquez@xxxxxxxxxxxx changed:

           What    |Removed                     |Added
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED

------- Additional Comments From vincent.hanquez@xxxxxxxxxxxx  2006-02-20 13:22 
The default HZ of xen guest kernels has always been 100 (before the upgrade to
The hypervisor is always running with HZ = 100 (see
xen/include/asm-x86/config.h), even if you change the kernel on top of it to
have a different HZ.

so the guest expect to run at HZ=250 but is actually running at HZ=100, which
give some weirdness (totally minor though)

BTW, bogomips (Bogus MIPS) doesn't give any real performance value, that just
for kernel internals to time the hardware. and the value has change over
different vanilla kernel too (comparing a vanilla 2.6.9 and vanilla 2.6.16 is
like comparing apples and oranges)

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