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node-feature-discovery/rdt-discovery/monitoring-cmt-discovery.c

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#include <stdio.h>
#include <stdlib.h>
#include "machine.h"
int main(int argc, char *argv[]) {
struct cpuid_out res;
// Logic below from https://github.com/01org/intel-cmt-cat/blob/master/lib/host_cap.c
lcpuid(0x7, 0x0, &res);
if (!(res.ebx & (1 << 12))) {
return EXIT_FAILURE;
}
// check for overall monitoring capability first
lcpuid(0xf, 0x0, &res);
if (!(res.edx & (1 << 1))) {
return EXIT_FAILURE;
}
// check for more detailed capability, CMT monitoring
lcpuid(0xf, 0x1, &res);
if (!(res.edx & (1 << 0))) {
return EXIT_FAILURE;
}
// If we are here, then CMT cache monitoring capability is available.
return EXIT_SUCCESS;
}