HP-UX Workload Manager Toolkits A.01.06 Release Notes for HP-UX 11.0, HP-UX 11i V1.0 and HP-UX 11i V2.0

HP-UX WLM Toolkits (WLMTK) Release Notes
Known problems and workarounds
Chapter 1 13
PPUTK: Capping issue may affect PPUTK
Issue WLM maintains CPU allocations for workloads by capping their CPU
access. Unfortunately, an algorithm in the CPU scheduler that WLM uses
does not always preserve capping when one or more CPUs are deactivated
on a Pay Per Use system or an iCOD system.
Workaround Configure WLM as desired and then determine whether the capping issue is
present on your system. To determine whether this issue is present:
1. Activate your WLM configuration:
# wlmd -a configuration_file
2. Wait for several WLM intervals (60 seconds by default) to pass.
3. Display CPU shares and utilization data by entering the wlminfo
command:
# wlminfo group
A portion of sample wlminfo output is shown below:
Workload Group PRMID CPU Shares CPU Util Mem Shares State
OTHERS 1 450.00 4.49 0.00 ON
g_nice 2 108.00 55.57 0.00 ON
g_nightly 3 0.00 0.00 0.00 OFF
g_team 4 6.00 0.00 0.00 ON
4. Check the “CPU Shares” and “CPU Util” columns. For a given group, if
its “CPU Util” value is ever greater than its “CPU Shares” value, your
system is affected by this issue.
5. If your system is affected, install the following patches:
On HP-UX 11.0, install patch PHKL_29434.
On HP-UX 11i V1.0 (B.11.11), install patches PHKL_29704,
PHKL_29705, PHKL_29706, PHKL_29707, PHKL_29708, and
PHKL_29709.