Returns Performance Monitor data in counter multiplexing mode for the counting group to which a target pthread belongs.
Performance Monitor APIs Library (libpmapi.a)
#include <pmapi.h>
int pm_get_data_pgroup_mx (pid, tid, ptid, *pmdata)
pid_t pid;
tid_t tid;
ptid_t ptid;
pm_data_mx_t *pmdata;
int pm_get_tdata_pgroup_mx (pid, tid, *pmdata, *time)
pm_data_mx_t *pmdata;
pid_t pid;
tid_t tid;
ptid_t ptid;
timebasestruct_t *time;The pm_get_data_pgroup_mx subroutine retrieves the current Performance Monitor data in counter multiplexing mode for the counting group to which a target pthread belongs. The pthread must be stopped and must be part of a debuggee process under the control of the calling process.
The pm_get_tdata_pgroup_mx subroutine retrieves the current Performance Monitor data in counter multiplexing mode for the counting group to which a target pthread belongs, and a timestamp indicating the last time the hardware counters were read.
If the pthread is running in 1:1 mode, only the tid parameter must be specified. If the pthread is running in m:n mode, only the ptid parameter must be specified. If both the ptid and tid parameters are specified, they must be referring to a single pthread with the ptid parameter specified and currently running on a kernel thread with specified tid parameter.
The Performance Monitor data is always an array of a set (one per hardware counter on the machine used) of 64-bit values. The information returned also includes the characteristics of the group, such as the number of its members, whether it is a process level group, and whether its counters are consistent with the sum of the counters for all of the pthreads in the group.
The user application must free the array allocated to store accumulated counts and times (the accu_set field of the pmdata parameter).
| Item | Description |
|---|---|
| pid | Process identifier of a target thread. The target process must be an argument of a debug process. |
| tid | Thread ID of target pthread. To ignore this parameter, set it to 0. |
| ptid | Pthread ID of the target pthread. To ignore this parameter, set it to 0. |
| *pmdata | Pointer to a structure to return the Performance Monitor data (array of accumulated counters, accumulated time and accumulated PURR and SPURR time for each event set counted) for the group to which the target pthread belongs. |
| *time | Pointer to a structure containing the timebase value the last time the hardware Performance Monitoring counters were read. This can be converted to time using the time_base_to_time subroutine. |
| Item | Description |
|---|---|
| 0 | No errors occurred. |
| Positive error code | Refer to the pm_error Subroutine to decode the error code. |
Refer to the pm_error Subroutine.
| Item | Description |
|---|---|
| /usr/include/pmapi.h | Defines standard macros, data types, and subroutines. |