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tools/power turbostat: Fix Core C6 residency on Atom CPUs 

For Atom CPUs that have core cstate deeper than C6,
MSR_CORE_C6_RESIDENCY actually returns the residency for both CC6 and
deeper Core cstates.
Thus, the real Core C6 residency should be the subtraction of
MSR_CORE_C6_RESIDENCY return value and MSR_CORE_C6_RESIDENCY return value.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Zhang Rui 2021-04-21 22:22:47 +08:00 committed by Len Brown
parent aeb01e6d71
commit 7ab5ff4937
1 changed files with 38 additions and 1 deletions
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39
tools/power/x86/turbostat/turbostat.c
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@ -35,6 +35,7 @@
#include <math.h>
#include <linux/perf_event.h>
#include <asm/unistd.h>
#include <stdbool.h>
char *proc_stat = "/proc/stat";
FILE *outf;
@ -185,6 +186,7 @@ struct thread_data {
unsigned int apic_id;
unsigned int x2apic_id;
unsigned int flags;
bool is_atom;
#define CPU_IS_FIRST_THREAD_IN_CORE 0x2
#define CPU_IS_FIRST_CORE_IN_PACKAGE 0x4
unsigned long long counter[MAX_ADDED_THREAD_COUNTERS];
@ -2090,9 +2092,19 @@ int get_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p)
return -7;
}
if (DO_BIC(BIC_CPU_c7) || soft_c1_residency_display(BIC_CPU_c7))
if (DO_BIC(BIC_CPU_c7) || soft_c1_residency_display(BIC_CPU_c7)) {
if (get_msr(cpu, MSR_CORE_C7_RESIDENCY, &c->c7))
return -8;
else if (t->is_atom) {
/*
* For Atom CPUs that has core cstate deeper than c6,
* MSR_CORE_C6_RESIDENCY returns residency of cc6 and deeper.
* Minus CC7 (and deeper cstates) residency to get
* accturate cc6 residency.
*/
c->c6 -= c->c7;
}
}
if (DO_BIC(BIC_Mod_c6))
if (get_msr(cpu, MSR_MODULE_C6_RES_MS, &c->mc6_us))
@ -4911,6 +4923,28 @@ double discover_bclk(unsigned int family, unsigned int model)
return 133.33;
}
int get_cpu_type(struct thread_data *t, struct core_data *c, struct pkg_data *p)
{
unsigned int eax, ebx, ecx, edx;
if (!genuine_intel)
return 0;
if (cpu_migrate(t->cpu_id)) {
fprintf(outf, "Could not migrate to CPU %d\n", t->cpu_id);
return -1;
}
if (max_level < 0x1a)
return 0;
__cpuid(0x1a, eax, ebx, ecx, edx);
eax = (eax >> 24) & 0xFF;
if (eax == 0x20 )
t->is_atom = true;
return 0;
}
/*
* MSR_IA32_TEMPERATURE_TARGET indicates the temperature where
* the Thermal Control Circuit (TCC) activates.
@ -5796,6 +5830,9 @@ void turbostat_init()
for_all_cpus(set_temperature_target, ODD_COUNTERS);
for_all_cpus(get_cpu_type, ODD_COUNTERS);
for_all_cpus(get_cpu_type, EVEN_COUNTERS);
if (!quiet)
for_all_cpus(print_thermal, ODD_COUNTERS);