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libcpumf: Function to return PMU name

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Return the PMU name as found in the sysfs tree given a PMU type number.

Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Reviewed-by: Jan Höppner <hoeppner@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
This commit is contained in:
Thomas Richter
2022-04-28 15:53:15 +02:00
committed by Jan Höppner
parent acdce2a7a9
commit a58460b5c7
4 changed files with 63 additions and 1 deletions
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include/lib/libcpumf.h
+14
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@@ -30,6 +30,20 @@
*/
int libcpumf_pmutype(const char *dirname);
/**
* Read out the PMU name from a given type.
*
* Return the PMU name this PMU was registered in kernel. If the PMU was
* registered without a name, it is not listed in the directory.
* The caller must free the memory returned by name.
*
* @param[in] wanted_type Type number of the PMU
* @param[out] name Name of the PMU (when retval is 0)
* @retval 0 PMU wanted_type detected and PMU name valid
* @retval -1 No PMU with wanted_type
*/
int libcpumf_pmuname(unsigned int wanted_type, char **name);
/**
* Read out the CPU list from a given file name, for example from files
* /sys/devices/system/cpu/online or /sys/devices/system/cpu/possible.