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cpc_enable(3cpc) [sunos man page]

cpc_enable(3CPC)														  cpc_enable(3CPC)

cpc_enable, cpc_disable - enable and disable performance counters SYNOPSIS
cc [ flag... ] file... -lcpc [ library... ] #include <libcpc.h> int cpc_enable(cpc_t *cpc); int cpc_disable(cpc_t *cpc); In certain applications, it can be useful to explicitly enable and disable performance counters at different times so that the performance of a critical algorithm can be examined. The cpc_enable() and cpc_disable() functions can be used to enable and disable the performance counters without otherwise disturbing the invoking LWP's performance hardware configuration. Upon successful completion, cpc_enable() and cpc_disable() return 0. Otherwise, they return -1 and set errno to indicate the error. These functions will fail if: EAGAIN The associated performance counter context has been invalidated by another process. EINVAL No performance counter context has been created for the calling LWP. Example 1: Use cpc_enable and cpc_disable to minimize code needed by application. In the following example, the cpc_enable() and cpc_disable() functions are used to minimize the amount of code that needs to be added to the application. The cputrack(1) command can be used in conjunction with these functions to provide event programming, sampling, and reporting facilities. If the application is instrumented in this way and then started by cputrack with the nouser flag set in the event specification, counting of user events will only be enabled around the critical code section of interest. If the program is run normally, no harm will ensue. int main(int argc, char *argv[]) { cpc_t *cpc = cpc_open(CPC_VER_CURRENT); /* ... application code ... */ if (cpc != NULL) (void) cpc_enable(cpc); /* ==> Code to be measured goes here <== */ if (cpc != NULL) (void) cpc_disable(cpc); /* ... other application code */ } See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Evolving | +-----------------------------+-----------------------------+ |MT-Level |Safe | +-----------------------------+-----------------------------+ cputrack(1), cpc(3CPC), cpc_open(3CPC), libcpc(3LIB), attributes(5) 31 Jan 2005 cpc_enable(3CPC)

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libcpc(3LIB)							Interface Libraries						      libcpc(3LIB)

libcpc - CPU performance counter library SYNOPSIS
cc [ flag... ] file... -lcpc [ library... ] DESCRIPTION
Functions in this library provide access to CPU performance counters on platforms that contain the appropriate hardware. INTERFACES
The shared object provides the public interfaces defined below. See Intro(3) for additional information on shared object inter- faces. cpc_access cpc_bind_cpu cpc_bind_curlwp cpc_bind_event cpc_bind_pctx cpc_buf_add cpc_buf_copy cpc_buf_create cpc_buf_destroy cpc_buf_get cpc_buf_hrtime cpc_buf_set cpc_buf_sub cpc_buf_tick cpc_buf_zero cpc_caps cpc_cciname cpc_close cpc_cpuref cpc_count_sys_events cpc_count_usr_events cpc_disable cpc_enable cpc_event_accum cpc_event_diff cpc_eventtostr cpc_getcciname cpc_getcpuref cpc_getcpuver cpc_getnpic cpc_getusage cpc_npic cpc_open cpc_pctx_bind_event cpc_pctx_invalidate cpc_pctx_rele cpc_pctx_take_sample cpc_rele cpc_request_preset cpc_set_add_request cpc_set_create cpc_set_destroy cpc_set_restart cpc_set_sample cpc_seterrfn cpc_seterrhndlr cpc_shared_bind_event cpc_shared_close cpc_shared_open cpc_shared_rele cpc_shared_take_sample cpc_strtoevent cpc_take_sample cpc_unbind cpc_version cpc_walk_attrs cpc_walk_events_all cpc_walk_events_pic cpc_walk_generic_events_all cpc_walk_generic_events_pic cpc_walk_names cpc_walk_requests FILES
/usr/lib/ shared object /usr/lib/64/ 64-bit shared object ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcpcu | |MT-Level |Safe | +-----------------------------+-----------------------------+ SEE ALSO
cputrack(1), cpustat(1M), Intro(3), cpc(3CPC), attributes(5), xVM(5) NOTES
There is no support for access to performance counters in the xVM(5) environment. The -h operations for cputrack(1) are not enabled. SunOS 5.11 8 Oct 2008 libcpc(3LIB)
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