pm_set_counter_frequency_pthread, pm_set_counter_frequency_thread, or pm_set_counter_frequency_mythread Subroutine
Purpose
Configures the counter frequencies for the target thread.
Library
Performance Monitor APIs Library (libpmapi.a)
Syntax
#include <pmapi.h>
int pm_set_counter_frequency_pthread (pid_t pid, tid_t tid,
ptid_t ptid,
unsigned counter_freq [MAX_COUNTERS])
int pm_set_counter_frequency_thread (pid_t pid, tid_t tid,
unsigned counter_freq [MAX_COUNTERS])
int pm_set_counter_frequency_mythread (unsigned counter_freq [MAX_COUNTERS])Description
The pm_set_counter_frequency_pthread, pm_set_counter_frequency_thread, or pm_set_counter_frequency_mythread subroutines configure the counter frequency values in the Performance Monitor Counters (PMCs) for a given thread.
The pm_set_counter_frequency_pthread subroutine must be used to configure the counter frequency for a target pthread.
The pm_set_counter_frequency_thread subroutine must be used to configure the counter frequency for a target kernel thread.
The pm_set_counter_frequency_mythread subroutine must be used to configure the counter frequency for self thread.
Parameters
| Item | Description |
|---|---|
| pid | Process ID of the target thread. |
| tid | Kernel thread ID of the target thread. The value can be set to zero, if the parameter is not required. |
| ptid | Pthread ID of the target thread. The value can be set to zero if the parameter is not required. |
| counter_freq | Counter frequencies of the corresponding PMCs. |
Return Values
If unsuccessful, a value other than zero is returned and a positive error code is set. If successful, a value of zero is returned.
Error Codes
The subroutine is unsuccessful if the following error codes are returned:
| Item | Description |
|---|---|
| Pmapi_NoInit | The pm_initialize subroutine is not called. |
| Pmapi_NoSetProg | The pm_set_program subroutine is not called. |
| Other non-zero error codes | Returned by the pmsvcs subroutine. |
Files
The pmapi.h file defines standard macros, data types, and subroutines.