Messages in this thread | | | From | Bernd Eckenfels <> | Subject | Re: [PATCH 1/2] VMware guest detection for x86 and x86-64 | Date | Thu, 25 Sep 2008 03:28:08 +0200 |
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In article <20080925002333.GD21049@yantp.cn.ibm.com> you wrote: > Oh I never heard about this. I've been using several VMware VMs > (combined RHEL and SLES and Debian) but haven't seen such > issue. What's the symptom?
Having a high HZ slows down VMs and also leads to tick loss (time drift). HZ 100 or 250 is recommended by most Vendors.
I think some distributions use the reduced HZ value by default anyway, so you might never had a problem with this.
It is also only a problem with system load and timekeeping, which is not always obvious. When running a lot of nearly idle VM Guests you might see it.
Gruss Bernd
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