Aix auditing : performance impact

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Operating Systems AIX Aix auditing : performance impact
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Old 02-18-2008
Aix auditing : performance impact

can someone help me find out the impact of enabling audting on the entire root filesystem. does it have a major hit on the overall performance of the system

Thanks so much
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X86_ENERGY_PERF_POLICY(8)				      System Manager's Manual					 X86_ENERGY_PERF_POLICY(8)

x86_energy_perf_policy - read or write MSR_IA32_ENERGY_PERF_BIAS SYNOPSIS
x86_energy_perf_policy [-c cpu] [-v] -r x86_energy_perf_policy [-c cpu] [-v] 'performance' x86_energy_perf_policy [-c cpu] [-v] 'normal' x86_energy_perf_policy [-c cpu] [-v] 'powersave' x86_energy_perf_policy [-c cpu] [-v] n DESCRIPTION
x86_energy_perf_policy allows software to convey its policy for the relative importance of performance versus energy savings to the proces- sor. The processor uses this information in model-specific ways when it must select trade-offs between performance and energy efficiency. This policy hint does not supersede Processor Performance states (P-states) or CPU Idle power states (C-states), but allows software to have influence where it would otherwise be unable to express a preference. For example, this setting may tell the hardware how aggressively or conservatively to control frequency in the "turbo range" above the explicitly OS-controlled P-state frequency range. It may also tell the hardware how aggressively is should enter the OS requested C- states. Support for this feature is indicated by CPUID.06H.ECX.bit3 per the Intel Architectures Software Developer's Manual. Options -c limits operation to a single CPU. The default is to operate on all CPUs. Note that MSR_IA32_ENERGY_PERF_BIAS is defined per logical processor, but that the initial implementations of the MSR were shared among all processors in each package. -v increases verbosity. By default x86_energy_perf_policy is silent. -r is for "read-only" mode - the unchanged state is read and displayed. performance Set a policy where performance is paramount. The processor will be unwilling to sacrifice any performance for the sake of energy saving. This is the hardware default. normal Set a policy with a normal balance between performance and energy efficiency. The processor will tolerate minor performance compro- mise for potentially significant energy savings. This reasonable default for most desktops and servers. powersave Set a policy where the processor can accept a measurable performance hit to maximize energy efficiency. n Set MSR_IA32_ENERGY_PERF_BIAS to the specified number. The range of valid numbers is 0-15, where 0 is maximum performance and 15 is max- imum energy efficiency. NOTES
x86_energy_perf_policy runs only as root. FILES
/dev/cpu/*/msr SEE ALSO
msr(4) AUTHORS
Written by Len Brown <> X86_ENERGY_PERF_POLICY(8)