PAPI_set_granularity(3)

💖 PAPI_set_granularity(3) 💖

okay bestie, welcome to the PAPI manual 💅 this page is for PAPI_set_granularity, and it is literally giving “set the default counting granularity for eventsets bound to the cpu component.” No cap. 🎀

---

✨ NAME ✨

PAPI_set_granularity — Set the default counting granularity for eventsets bound to the cpu component. 🦋

✨ SYNOPSIS ✨

Detailed Description

C Prototype:

#include <papi.h>
 int PAPI_set_granularity( int granularity );

Parameters

• granularity — one of the following constants as defined in the papi.h header file:
  • PAPI_GRN_THR — Count each individual thread
  • PAPI_GRN_PROC — Count each individual process
  • PAPI_GRN_PROCG — Count each individual process group
  • PAPI_GRN_SYS — Count the current CPU
  • PAPI_GRN_SYS_CPU — Count all CPUs individually
  • PAPI_GRN_MIN — The finest available granularity
  • PAPI_GRN_MAX — The coarsest available granularity

Return values

• PAPI_OK
• PAPI_EINVAL — One or more of the arguments is invalid.

So here’s the tea ☕: PAPI_set_granularity sets the default counting granularity for all new event sets created by PAPI_create_eventset. This call implicitly sets the granularity for the cpu component (component 0), and it’s included to preserve backward compatibility. That part is important, bestie — don’t skip it. 💅

Example:

int ret;

// Initialize the library
ret = PAPI_library_init(PAPI_VER_CURRENT);
if (ret > 0 && ret != PAPI_VER_CURRENT) {
  fprintf(stderr,"PAPI library version mismatch!\n");
  exit(1);
}
if (ret < 0) handle_error(ret);

// Set the default granularity for the cpu component
ret = PAPI_set_granularity(PAPI_GRN_PROC);
if (ret != PAPI_OK) handle_error(ret);
ret = PAPI_create_eventset(&EventSet);
if (ret != PAPI_OK) handle_error(ret);

🌈 See also 🌈

the page says see also:

• PAPI_set_cmp_granularity
• PAPI_set_domain
• PAPI_set_opt
• PAPI_get_opt

👑 Author 👑

Author: Generated automatically by Doxygen for PAPI from the source code. 🤖✨

---

okay that’s the whole page, bestie — this footer is giving Version 7.2.0.0, dated Wed Jun 25 2025 19:30:49. bye 💖