03-10-2009
How to get performance report for previous date?
Hi,
i need to compare system performance with previous days performance in terms of cpu,memory,swap utilisation by processes.
with glance,top we can get but it will show only present utilisation.
Anybody can let me know how to get this?
OS : HP-UX 11i
Thanks in advance..
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LEARN ABOUT FREEBSD
pmc_enable
PMC_ENABLE(3) BSD Library Functions Manual PMC_ENABLE(3)
NAME
pmc_disable, pmc_enable -- administrative control of hardware performance counters
LIBRARY
Performance Counters Library (libpmc, -lpmc)
SYNOPSIS
#include <pmc.h>
int
pmc_disable(int cpu, int pmc);
int
pmc_enable(int cpu, int pmc);
DESCRIPTION
These functions allow specific hardware performance monitoring counters in a system to be disabled and enabled administratively. The hard-
ware performance counters available on each CPU are numbered using small non-negative integers, in a system dependent manner. Disabled coun-
ters will not be available to applications for use.
The invoking process needs to have the PRIV_PMC_MANAGE privilege to perform these operations.
Function pmc_disable() disables the hardware counter numbered by argument pmc on CPU number cpu.
Function pmc_enable() enables the hardware counter numbered by argument pmc on CPU number cpu.
IMPLEMENTATION NOTES
Hardware PMCs that are currently in use by applications cannot be disabled. Allocation of a process scope software PMC marks all hardware
PMCs in the system with the same pmc number as being in-use.
RETURN VALUES
Upon successful completion, the value 0 is returned; otherwise the value -1 is returned and the global variable errno is set to indicate the
error.
ERRORS
A call to these functions may fail with the following errors:
[EBUSY] Function pmc_disable() specified a hardware PMC is currently in use.
[EINVAL] Arguments cpu or pmc were invalid.
[ENXIO] Argument cpu specified a disabled or absent CPU.
[EPERM] The current process lacks sufficient privilege to perform this operation.
SEE ALSO
pmc(3), pmc_cpuinfo(3), pmc_pmcinfo(3), hwpmc(4), pmccontrol(8), priv_check(9)
BSD
September 22, 2008 BSD