Copyright © 2008 VMware, Inc. All rights reserved. 13
Installing and Configuring Linux Guest Operating Systems
ForGRUB,putthekernelcommandlineparametersattheendofthekernelline.Forexampleifthekernel
linelookslike:
kernel /vmlinuz-2.6.18 ro root=/dev/hda2
andyouwanttoaddclock=pmtmr divider=10,theupdatedtextis:
kernel /vmlinuz-2.6.18 ro root=/dev/hda2 clock=pmtmr divider=10
Foradditionalinformationaboutworkingwithbootloaders,seeyourLinuxdistribution’sdocumentation.
AmongRedHatEnterpriseLinux4versions,RedHatEnterpriseLinux4.7hasthebesttimekeeping
performancebecauseoftheavailabilityofthedivider=10option.
AmongRedHatEnterpriseLinux5version,RedHatEnterpriseLinux5.1and5.2
havethebesttimekeeping
performancebecauseoftheavailabilityofthedivider=10option.
Table 4. Settings for 32-bit Kernels
Linux Version Kernel Parameters Notes
RedHatEnterpriseLinux5.2 divider=10 clocksource=acpi_pm
RedHatEnterpriseLinux5.1 divider=10 clocksource=acpi_pm
RedHatEnterpriseLinux5.0 clocksource=acpi_pm
RedHatEnterpriseLinux4.7 clock=pmtmr divider=10
RedHatEnterpriseLinux4.0,4.1,4.2,4.3,
4.4,4.5,4.6
clock=pmtmr
RedHatEnterpriseLinux3(allupdates) Noadditionalkernel
parametersrequired.
SUSELinuxEnterpriseServer10SP2on
ESX3.5
andlater
Recommended.Usea
VMI‐enabledkernel.
SUSELinuxEnterpriseServer10SP2on
ESXServer3.0.xandearlier
clock=pmtmr
SUSELinuxEnterpriseServer10SP1 clock=pmtmr
SUSELinuxEnterpriseServer10 clock=pmtmr
SUSELinuxEnterpriseServer9(all
updates)
clock=pmtmr
Ubuntu8.04onESX3.5andlater Recommended.Usea
VMI‐enabledkernel.
Ubuntu8.04
onESXServer3.0.xand
earlier
clocksource=acpi_pm
Ubuntu7.04,7.10 clocksource=acpi_pm
Ubuntu5.04,5.10,6.06,6.10 clock=pmtmr
Table 5. Settings for 64-bit Kernels
Linux Version Kernel Parameters Notes
RedHatEnterpriseLinux5.2 notsc divider=10
RedHatEnterpriseLinux5.1with
RHSA‐2007:0993‐13
notsc divider=10
RedHatEnterpriseLinux5.1without
RHSA‐2007:0993‐13
notsc
RedHatEnterpriseLinux5.0 Noadditionalkernelparametersrequired.
RedHatEnterpriseLinux4.7 notsc divider=10
RedHatEnterpriseLinux4.2,4.3,4.4,4.5,4.6 notsc
RedHatEnterpriseLinux4.0,
4.1 Doesnotsupportnotsc.Avoidusingif
possible.
Commentaires sur ces manuels