HP-UX vPars and Integrity VM V6.1.5 Administrator Guide (5900-2295, April 2013)

Hyperthreading is supported in individual vPars. The setboot command in individual vPars shows
that HT is ON. You can turn on lcpu_attr in individual vPars using the kctune command. By
default, lcpu_attr is OFF in the vPar (default behavior of HP-UX). Note that even when
lcpu_attr is OFF in the VSP, each vPar can have its individual lcpu_attr enabled to get
hyperthreading functionality in the vPar.
As in previous releases, hyperthreading is not supported for VMs. Therefore, individual VMs will
not show any hyperthreading capability.
2.7 VSP I/O configuration
To map direct I/O devices between the VSP and the vPars or VMs:
• From the VSP:
# hpvmdevinfo -P vm
• From the vPar or VM:
# hpvmdevinfo
For AVIO, HP strongly recommends that you use the same AVIO components from the same release
on both the VSP and vPar/VMs, for example, both from the OE or both from the same Web Release
(for example, WEB1103).
2.8 VSP kernel tunables
Upon installation, tunables are set to the following values:
• maxdsiz_64bit – 34359738368 (4294967296)
• filecache_min – 134217728 or 1% (1707212800)
• filecache_max – 134217728 or 1% (17072390144)
• lockable_mem_pct – 99% (90%)
• base_pagesize — 64 (4)
• vx_ninode — 131072 (0)
• vxfs_ifree_timelag — -1 (0)
• vxfs_bc_bufhwm — 64000 (0)
The first value is the modified value and the number in parenthesis is the default .
2.7 VSP I/O configuration 33