Enabling Ht Technology; Adding An X86 Smp Kernel - HP xw3400 User Manual

The following table identifies the tested Red Hat version and kernel version combinations that support
HT Technology.
Red Hat Version
Red Hat Enterprise Linux WS 4 Update 1
Red Hat Enterprise Linux WS 3 Update 5
Red Hat Enterprise Linux WS 3 Update 4
(32-bit and EM64T)
Red Hat Enterprise Linux WS 3 Update 2
(32-bit and EM64T)
Red Hat Enterprise Linux WS 3 (32-bit and
EM64T)
Red Hat 9
Red Hat 8.0
Red Hat 7.3
Red Hat 7.2

Enabling HT Technology

To enable HT Technology:
Download and install the latest BIOS version from
1.
NOTE: BIOS update is critical for the following platforms. Some earlier BIOS versions do not fully
support HT Technology.
– xw8000 requires 1.10 or later
– xw6000 requires 1.16 or later
– xw4100 requires 1.14 or later
Reboot and go into the BIOS setup menu.
2.
Select the Advanced menu.
3.
Change the "Hyperthreading" option to "enabled" under the either the Processors or Devices
4.
menu.
Save the changes and Exit.
5.
Verify that the SMP kernel is installed and that the boot loader is configured to load it. For
6.
information about the boot loader configuration, visit

Adding an x86 SMP Kernel

For systems that were installed with a single processor, the SMP kernel and source .rpm files must be
installed from either CD 1 of your Red Hat box-set (look under the RedHat/RPMS directory for
kernel-smp*.rpm, kernel-hugemem*.rpm, or kernel-source*.rpm ) or download from
.
http://www.redhat.com
To find out if you need to install a new SMP kernel, run the uname-r command.
1.
Verify that the output has "smp", "bigmem", or "hugemem" in the name. You only need to install a
2.
new kernel if:·
– only a UP (non-SMP) kernel is installed
– the SMP kernel is likely to be too old to support the Hyper-Threading Technology (see the
preceding table)
Kernel Version (box HT Technology works?
set/HP media)
2.6.9-11 Yes
2.4.21-32 Yes
2.4.21-27 Yes
2.4.21-15 Yes
2.4.21-4 Yes
2.4.20-8 Yes
2.4.18-14 Yes (some applications may hang)
2.4.18-26 No (intermittent boot hangs)
2.4.18-3 No
www.hp.com/go/workstationsupport
http://www.redhat.com/
.
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