/*
* This file tests uncore events on AMD fam15h Northbridge machines
* The Linux perf_event developers introduced fam15h Northbridge
* support in Linux 3.9 with an interfae similar to fam10h
* where the events were part of the core CPU
* They broke the ABI with Linux 3.10 and made fam15h NB a separate
* PMU, like the Intel uncore support.
*/
#include <stdio.h>
#include <string.h>
#include <sys/utsname.h>
#include "papi.h"
#include "papi_test.h"
#include "do_loops.h"
int main( int argc, char **argv ) {
int retval;
int EventSet = PAPI_NULL;
long long values[1];
char event_name[BUFSIZ];
int uncore_cidx=-1;
const PAPI_hw_info_t *hwinfo;
int quiet;
struct utsname uname_info;
/* Set TESTS_QUIET variable */
quiet = tests_quiet( argc, argv );
uname(&uname_info);
if (!quiet) printf("Found Linux %s\n",uname_info.release);
/* Init the PAPI library */
retval = PAPI_library_init( PAPI_VER_CURRENT );
if ( retval != PAPI_VER_CURRENT ) {
test_fail( __FILE__, __LINE__, "PAPI_library_init", retval );
}
/* Check for AMD machine */
hwinfo = PAPI_get_hardware_info();
if ( hwinfo == NULL ) {
test_fail( __FILE__, __LINE__, "PAPI_get_hardware_info", 0 );
}
if (hwinfo->vendor != PAPI_VENDOR_AMD) {
if (!quiet) printf("Test only for AMD machines\n");
test_skip(__FILE__,__LINE__,"Test only for AMD processor",0);
}
if ( hwinfo->cpuid_family != 21) {
if (!quiet) printf("Test only for fam15h AMD machines\n");
test_skip(__FILE__,__LINE__,"Test only for fam15h AMD processor",0);
}
if (!strcmp(uname_info.release,"3.9")) {
if (!quiet) printf("Detected 3.9 kernel, using perf_event\n");
/* For kernel 3.9 use regular CPU component */
/* Find the uncore PMU */
uncore_cidx=PAPI_get_component_index("perf_event");
if (uncore_cidx<0) {
test_skip(__FILE__,__LINE__,"perf_event component not found",0);
}
/* Get a relevant event name */
strncpy(event_name,"DRAM_ACCESSES:ALL", BUFSIZ);
}
else {
/* 3.10 and later */
if (!quiet) {
printf("Detected > 3.9 kernel, using perf_event_uncore\n");
}
/* Find the uncore PMU */
uncore_cidx=PAPI_get_component_index("perf_event_uncore");
if (uncore_cidx<0) {
test_skip(__FILE__,__LINE__,"perf_event_uncore component not found",0);
}
/* Get a relevant event name */
/* This might change once libpfm4 gets new fam15h NB support */
strncpy(event_name,"DRAM_ACCESSES:ALL", BUFSIZ);
}
/* Create an eventset */
retval = PAPI_create_eventset(&EventSet);
if (retval != PAPI_OK) {
test_fail(__FILE__, __LINE__, "PAPI_create_eventset",retval);
}
/* Set a component for the EventSet */
retval = PAPI_assign_eventset_component(EventSet, uncore_cidx);
/* we need to set to a certain cpu for uncore to work */
PAPI_cpu_option_t cpu_opt;
cpu_opt.eventset=EventSet;
cpu_opt.cpu_num=0;
retval = PAPI_set_opt(PAPI_CPU_ATTACH,(PAPI_option_t*)&cpu_opt);
if (retval != PAPI_OK) {
test_skip( __FILE__, __LINE__,
"this test; trying to PAPI_CPU_ATTACH; need to run as root",
retval);
}
/* we need to set the granularity to system-wide for uncore to work */
PAPI_granularity_option_t gran_opt;
gran_opt.def_cidx=0;
gran_opt.eventset=EventSet;
gran_opt.granularity=PAPI_GRN_SYS;
retval = PAPI_set_opt(PAPI_GRANUL,(PAPI_option_t*)&gran_opt);
if (retval != PAPI_OK) {
test_skip( __FILE__, __LINE__,
"this test; trying to set PAPI_GRN_SYS",
retval);
}
/* we need to set domain to be as inclusive as possible */
PAPI_domain_option_t domain_opt;
domain_opt.def_cidx=0;
domain_opt.eventset=EventSet;
domain_opt.domain=PAPI_DOM_ALL;
retval = PAPI_set_opt(PAPI_DOMAIN,(PAPI_option_t*)&domain_opt);
if (retval != PAPI_OK) {
test_skip( __FILE__, __LINE__,
"this test; trying to set PAPI_DOM_ALL; need to run as root",
retval);
}
/* Add our uncore event */
retval = PAPI_add_named_event(EventSet, event_name);
if (retval != PAPI_OK) {
if ( !quiet ) {
fprintf(stderr,"Error trying to use event %s\n", event_name);
}
test_fail(__FILE__, __LINE__, "adding uncore event",retval);
}
/* Start PAPI */
retval = PAPI_start( EventSet );
if ( retval != PAPI_OK ) {
test_fail( __FILE__, __LINE__, "PAPI_start", retval );
}
/* our work code */
do_flops( NUM_FLOPS );
/* Stop PAPI */
retval = PAPI_stop( EventSet, values );
if ( retval != PAPI_OK ) {
test_fail( __FILE__, __LINE__, "PAPI_stop", retval );
}
if ( !quiet ) {
printf("AMD fam15h Northbridge test:\n");
printf("Using event %s\n",event_name);
printf("\t%s: %lld\n",event_name,values[0]);
}
test_pass( __FILE__ );
return 0;
}