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Date: Fri, 11 Feb 2022 02:14:12 +0000
From: "Brown, Len" <len.brown@...el.com>
To: "Chen, Yu C" <yu.c.chen@...el.com>,
"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
Len Brown <lenb@...nel.org>
CC: Artem Bityutskiy <artem.bityutskiy@...ux.intel.com>,
"Rafael J. Wysocki" <rafael@...nel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 1/2] tools/power turbostat: Support thermal throttle count
print
What is the scope of this counter -- per-core or per-CPU?
-----Original Message-----
From: Chen, Yu C <yu.c.chen@...el.com>
Sent: Friday, November 12, 2021 6:52 AM
To: linux-pm@...r.kernel.org; Len Brown <lenb@...nel.org>
Cc: Artem Bityutskiy <artem.bityutskiy@...ux.intel.com>; Rafael J. Wysocki <rafael@...nel.org>; Brown, Len <len.brown@...el.com>; linux-kernel@...r.kernel.org; Chen, Yu C <yu.c.chen@...el.com>
Subject: [PATCH 1/2] tools/power turbostat: Support thermal throttle count print
The turbostat data is collected by end user for power evaluationit. However it looks like we are missing enough thermal context there. Already a couple of time we found that power management developer asking something like this:
grep -r . /sys/devices/system/cpu/cpu*/thermal_throttle/*
Print the per core thermal throttle count so as to get suffificent thermal context.
turbostat -i 5 -s Core,CPU,CoreThr
Core CPU CoreThr
- - 104
0 0 61
0 4
1 1 0
1 5
2 2 104
2 6
3 3 7
3 7
Suggested-by: Artem Bityutskiy <artem.bityutskiy@...ux.intel.com>
Signed-off-by: Chen Yu <yu.c.chen@...el.com>
---
tools/power/x86/turbostat/turbostat.c | 43 +++++++++++++++++++++++++++
1 file changed, 43 insertions(+)
diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index 47d3ba895d6d..b7908f1ee969 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -205,6 +205,7 @@ struct core_data {
unsigned int core_temp_c;
unsigned int core_energy; /* MSR_CORE_ENERGY_STAT */
unsigned int core_id;
+ unsigned long long core_throt_cnt;
unsigned long long counter[MAX_ADDED_COUNTERS]; } *core_even, *core_odd;
@@ -610,6 +611,7 @@ struct msr_counter bic[] = {
{ 0x0, "Die" },
{ 0x0, "GFXAMHz" },
{ 0x0, "IPC" },
+ { 0x0, "CoreThr" },
};
#define MAX_BIC (sizeof(bic) / sizeof(struct msr_counter)) @@ -666,6 +668,7 @@ struct msr_counter bic[] = {
#define BIC_Die (1ULL << 50)
#define BIC_GFXACTMHz (1ULL << 51)
#define BIC_IPC (1ULL << 52)
+#define BIC_CORE_THROT_CNT (1ULL << 53)
#define BIC_TOPOLOGY (BIC_Package | BIC_Node | BIC_CoreCnt | BIC_PkgCnt | BIC_Core | BIC_CPU | BIC_Die ) #define BIC_THERMAL_PWR ( BIC_CoreTmp | BIC_PkgTmp | BIC_PkgWatt | BIC_CorWatt | BIC_GFXWatt | BIC_RAMWatt | BIC_PKG__ | BIC_RAM__) @@ -872,6 +875,9 @@ void print_header(char *delim)
if (DO_BIC(BIC_CoreTmp))
outp += sprintf(outp, "%sCoreTmp", (printed++ ? delim : ""));
+ if (DO_BIC(BIC_CORE_THROT_CNT))
+ outp += sprintf(outp, "%sCoreThr", (printed++ ? delim : ""));
+
if (do_rapl && !rapl_joules) {
if (DO_BIC(BIC_CorWatt) && (do_rapl & RAPL_PER_CORE_ENERGY))
outp += sprintf(outp, "%sCorWatt", (printed++ ? delim : "")); @@ -1011,6 +1017,7 @@ int dump_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p
outp += sprintf(outp, "c6: %016llX\n", c->c6);
outp += sprintf(outp, "c7: %016llX\n", c->c7);
outp += sprintf(outp, "DTS: %dC\n", c->core_temp_c);
+ outp += sprintf(outp, "cpu_throt_count: %016llX\n",
+c->core_throt_cnt);
outp += sprintf(outp, "Joules: %0X\n", c->core_energy);
for (i = 0, mp = sys.cp; mp; i++, mp = mp->next) { @@ -1225,6 +1232,10 @@ int format_counters(struct thread_data *t, struct core_data *c, struct pkg_data
if (DO_BIC(BIC_CoreTmp))
outp += sprintf(outp, "%s%d", (printed++ ? delim : ""), c->core_temp_c);
+ /* Core throttle count */
+ if (DO_BIC(BIC_CORE_THROT_CNT))
+ outp += sprintf(outp, "%s%lld", (printed++ ? delim : ""),
+c->core_throt_cnt);
+
for (i = 0, mp = sys.cp; mp; i++, mp = mp->next) {
if (mp->format == FORMAT_RAW) {
if (mp->width == 32)
@@ -1311,6 +1322,7 @@ int format_counters(struct thread_data *t, struct core_data *c, struct pkg_data
if (DO_BIC(BIC_PkgWatt))
outp +=
sprintf(outp, fmt8, (printed++ ? delim : ""), p->energy_pkg * rapl_energy_units / interval_float);
+
if (DO_BIC(BIC_CorWatt) && !(do_rapl & RAPL_PER_CORE_ENERGY))
outp +=
sprintf(outp, fmt8, (printed++ ? delim : ""), p->energy_cores * rapl_energy_units / interval_float); @@ -1467,6 +1479,7 @@ void delta_core(struct core_data *new, struct core_data *old)
old->c6 = new->c6 - old->c6;
old->c7 = new->c7 - old->c7;
old->core_temp_c = new->core_temp_c;
+ old->core_throt_cnt = new->core_throt_cnt;
old->mc6_us = new->mc6_us - old->mc6_us;
DELTA_WRAP32(new->core_energy, old->core_energy); @@ -1626,6 +1639,7 @@ void clear_counters(struct thread_data *t, struct core_data *c, struct pkg_data
c->mc6_us = 0;
c->core_temp_c = 0;
c->core_energy = 0;
+ c->core_throt_cnt = 0;
p->pkg_wtd_core_c0 = 0;
p->pkg_any_core_c0 = 0;
@@ -1710,6 +1724,7 @@ int sum_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p)
average.cores.mc6_us += c->mc6_us;
average.cores.core_temp_c = MAX(average.cores.core_temp_c, c->core_temp_c);
+ average.cores.core_throt_cnt = MAX(average.cores.core_throt_cnt,
+c->core_throt_cnt);
average.cores.core_energy += c->core_energy;
@@ -1987,6 +2002,26 @@ void get_apic_id(struct thread_data *t)
fprintf(outf, "cpu%d: BIOS BUG: apic 0x%x x2apic 0x%x\n", t->cpu_id, t->apic_id, t->x2apic_id); }
+int get_core_throt_cnt(int cpu, unsigned long long *cnt) {
+ char path[128 + PATH_BYTES];
+ unsigned long long tmp;
+ FILE *fp;
+ int ret;
+
+ sprintf(path, "/sys/devices/system/cpu/cpu%d/thermal_throttle/core_throttle_count", cpu);
+ fp = fopen(path, "r");
+ if (!fp)
+ return -1;
+ ret = fscanf(fp, "%lld", &tmp);
+ if (ret != 1)
+ return -1;
+ fclose(fp);
+ *cnt = tmp;
+
+ return 0;
+}
+
/*
* get_counters(...)
* migrate to cpu
@@ -2129,6 +2164,9 @@ int get_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p)
c->core_temp_c = tj_max - ((msr >> 16) & 0x7F);
}
+ if (DO_BIC(BIC_CORE_THROT_CNT))
+ get_core_throt_cnt(cpu, &c->core_throt_cnt);
+
if (do_rapl & RAPL_AMD_F17H) {
if (get_msr(cpu, MSR_CORE_ENERGY_STAT, &msr))
return -14;
@@ -5572,6 +5610,11 @@ void process_cpuid()
else
BIC_NOT_PRESENT(BIC_CPU_LPI);
+ if (!access("/sys/devices/system/cpu/cpu0/thermal_throttle/core_throttle_count", R_OK))
+ BIC_PRESENT(BIC_CORE_THROT_CNT);
+ else
+ BIC_NOT_PRESENT(BIC_CORE_THROT_CNT);
+
if (!access(sys_lpi_file_sysfs, R_OK)) {
sys_lpi_file = sys_lpi_file_sysfs;
BIC_PRESENT(BIC_SYS_LPI);
--
2.25.1
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