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cpu: Add a 2nd label 'package' to metric node_cpu_core_throttles_total (#871)

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* cpu: Add a 2nd label 'package' to metric node_cpu_core_throttles_total

This commit fixes the node_cpu_core_throttles_total metrics on
multi-socket systems as the core_ids are the same for each package.
I.e. we need to count them seperately.

Rename the node_package_throttles_total metric label `node` to `package`.

Reorganize the sys.ttar archive and use the same symlinks as the Linux
kernel. Also, the new fixtures now use a dual-socket dual-core cpu w/o
HT/SMT (node0: cpu0+1, node1: cpu2+3) as well as processor-less
(memory-only) NUMA node 'node2' (this is a very rare case).

Signed-off-by: Karsten Weiss <knweiss@gmail.com>

* cpu: Use the direct /sys path to the cpu files.

Use the direct path /sys/devices/system/cpu/cpu[0-9]* (without symlinks)
instead of /sys/bus/cpu/devices/cpu[0-9]*.

The latter path also does not exist e.g. on RHEL 6.9's kernel.

Signed-off-by: Karsten Weiss <knweiss@gmail.com>

* cpu: Reverse core+package throttle processing order

Signed-off-by: Karsten Weiss <knweiss@gmail.com>

* cpu: Add documentation URLs

Signed-off-by: Karsten Weiss <knweiss@gmail.com>
pull/888/head
Karsten Weiss 7 years ago committed by Johannes 'fish' Ziemke
parent f32ec245a3
commit efc1fdb6d0
4 changed files with 384 additions and 232 deletions
Show Stats Download Patch File Download Diff File

6
CHANGELOG.md
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@ -2,10 +2,14 @@
**Breaking changes**
This release contains more breaking changes:
* Rename label `node` of metric `node_cpu_package_throttles_total` to `package`.
* Add 2nd label `package` to metric `node_cpu_core_throttles_total`.
* [CHANGE]
* [FEATURE]
* [ENHANCEMENT]
* [BUGFIX]
* [BUGFIX] Count core throttles per core and per package #871
## 0.16.0-rc.1 / 2018-04-04

112
collector/cpu_linux.go
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@ -17,7 +17,6 @@ package collector
import (
"fmt"
"io/ioutil"
"os"
"path/filepath"
"regexp"
@ -74,12 +73,12 @@ func NewCPUCollector() (Collector, error) {
cpuCoreThrottle: prometheus.NewDesc(
prometheus.BuildFQName(namespace, cpuCollectorSubsystem, "core_throttles_total"),
"Number of times this cpu core has been throttled.",
[]string{"core"}, nil,
[]string{"package", "core"}, nil,
),
cpuPackageThrottle: prometheus.NewDesc(
prometheus.BuildFQName(namespace, cpuCollectorSubsystem, "package_throttles_total"),
"Number of times this cpu package has been throttled.",
[]string{"node"}, nil,
[]string{"package"}, nil,
),
}, nil
}
@ -95,16 +94,16 @@ func (c *cpuCollector) Update(ch chan<- prometheus.Metric) error {
return nil
}
// updateCPUfreq reads /sys/bus/cpu/devices/cpu* and expose cpu frequency statistics.
// updateCPUfreq reads /sys/devices/system/cpu/cpu* and expose cpu frequency statistics.
func (c *cpuCollector) updateCPUfreq(ch chan<- prometheus.Metric) error {
cpus, err := filepath.Glob(sysFilePath("bus/cpu/devices/cpu[0-9]*"))
cpus, err := filepath.Glob(sysFilePath("devices/system/cpu/cpu[0-9]*"))
if err != nil {
return err
}
var value uint64
cpu_core_throttles := make(map[int]uint64)
packageThrottles := make(map[uint64]uint64)
packageCoreThrottles := make(map[uint64]map[uint64]uint64)
// cpu loop
for _, cpu := range cpus {
@ -132,66 +131,69 @@ func (c *cpuCollector) updateCPUfreq(ch chan<- prometheus.Metric) error {
ch <- prometheus.MustNewConstMetric(c.cpuFreqMax, prometheus.GaugeValue, float64(value)*1000.0, cpuNum)
}
if _, err := os.Stat(filepath.Join(cpu, "thermal_throttle")); os.IsNotExist(err) {
log.Debugf("CPU %v is missing thermal_throttle", cpu)
// See
// https://www.kernel.org/doc/Documentation/x86/topology.txt
// https://www.kernel.org/doc/Documentation/cputopology.txt
// https://www.kernel.org/doc/Documentation/ABI/testing/sysfs-devices-system-cpu
var err error
var physicalPackageID, coreID uint64
// topology/physical_package_id
if physicalPackageID, err = readUintFromFile(filepath.Join(cpu, "topology", "physical_package_id")); err != nil {
log.Debugf("CPU %v is missing physical_package_id", cpu)
continue
}
// topology/core_id
if coreID, err = readUintFromFile(filepath.Join(cpu, "topology", "core_id")); err != nil {
log.Debugf("CPU %v is missing core_id", cpu)
continue
}
if value, err := readUintFromFile(filepath.Join(cpu, "topology/core_id")); err != nil {
log.Debugf("CPU %v is misssing topology/core_id", cpu)
} else {
core_id := int(value)
if value, err = readUintFromFile(filepath.Join(cpu, "thermal_throttle", "core_throttle_count")); err != nil {
return err
// metric node_cpu_core_throttles_total
//
// We process this metric before the package throttles as there
// are cpu+kernel combinations that only present core throttles
// but no package throttles.
// Seen e.g. on an Intel Xeon E5472 system with RHEL 6.9 kernel.
if _, present := packageCoreThrottles[physicalPackageID]; !present {
packageCoreThrottles[physicalPackageID] = make(map[uint64]uint64)
}
if _, present := packageCoreThrottles[physicalPackageID][coreID]; !present {
// Read thermal_throttle/core_throttle_count only once
if coreThrottleCount, err := readUintFromFile(filepath.Join(cpu, "thermal_throttle", "core_throttle_count")); err == nil {
packageCoreThrottles[physicalPackageID][coreID] = coreThrottleCount
} else {
log.Debugf("CPU %v is missing core_throttle_count", cpu)
}
cpu_core_throttles[core_id] = value
}
}
// core throttles
for core_id, value := range cpu_core_throttles {
ch <- prometheus.MustNewConstMetric(c.cpuCoreThrottle, prometheus.CounterValue, float64(value), strconv.Itoa(core_id))
// metric node_cpu_package_throttles_total
if _, present := packageThrottles[physicalPackageID]; !present {
// Read thermal_throttle/package_throttle_count only once
if packageThrottleCount, err := readUintFromFile(filepath.Join(cpu, "thermal_throttle", "package_throttle_count")); err == nil {
packageThrottles[physicalPackageID] = packageThrottleCount
} else {
log.Debugf("CPU %v is missing package_throttle_count", cpu)
}
}
}
nodes, err := filepath.Glob(sysFilePath("bus/node/devices/node[0-9]*"))
if err != nil {
return err
for physicalPackageID, packageThrottleCount := range packageThrottles {
ch <- prometheus.MustNewConstMetric(c.cpuPackageThrottle,
prometheus.CounterValue,
float64(packageThrottleCount),
strconv.FormatUint(physicalPackageID, 10))
}
// package / NUMA node loop
for _, node := range nodes {
if _, err := os.Stat(filepath.Join(node, "cpulist")); os.IsNotExist(err) {
log.Debugf("NUMA node %v is missing cpulist", node)
continue
}
cpulist, err := ioutil.ReadFile(filepath.Join(node, "cpulist"))
if err != nil {
log.Debugf("could not read cpulist of NUMA node %v", node)
return err
}
// cpulist example of one package/node with HT: "0-11,24-35"
line := strings.Split(string(cpulist), "\n")[0]
if line == "" {
// Skip processor-less (memory-only) NUMA nodes.
// E.g. RAM expansion with Intel Optane Drive(s) using
// Intel Memory Drive Technology (IMDT).
log.Debugf("skipping processor-less (memory-only) NUMA node %v", node)
continue
}
firstCPU := strings.FieldsFunc(line, func(r rune) bool {
return r == '-' || r == ','
})[0]
if _, err := os.Stat(filepath.Join(node, "cpu"+firstCPU, "thermal_throttle", "package_throttle_count")); os.IsNotExist(err) {
log.Debugf("Node %v CPU %v is missing package_throttle", node, firstCPU)
continue
for physicalPackageID, core_map := range packageCoreThrottles {
for coreID, coreThrottleCount := range core_map {
ch <- prometheus.MustNewConstMetric(c.cpuCoreThrottle,
prometheus.CounterValue,
float64(coreThrottleCount),
strconv.FormatUint(physicalPackageID, 10),
strconv.FormatUint(coreID, 10))
}
if value, err = readUintFromFile(filepath.Join(node, "cpu"+firstCPU, "thermal_throttle", "package_throttle_count")); err != nil {
return err
}
nodeno := digitRegexp.FindAllString(node, 1)[0]
ch <- prometheus.MustNewConstMetric(c.cpuPackageThrottle, prometheus.CounterValue, float64(value), nodeno)
}
return nil
}

47
collector/fixtures/e2e-output.txt
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@ -180,22 +180,27 @@ node_buddyinfo_blocks{node="0",size="9",zone="Normal"} 0
node_context_switches_total 3.8014093e+07
# HELP node_cpu_core_throttles_total Number of times this cpu core has been throttled.
# TYPE node_cpu_core_throttles_total counter
node_cpu_core_throttles_total{core="0"} 5
node_cpu_core_throttles_total{core="1"} 0
node_cpu_core_throttles_total{core="0",package="0"} 5
node_cpu_core_throttles_total{core="0",package="1"} 0
node_cpu_core_throttles_total{core="1",package="0"} 0
node_cpu_core_throttles_total{core="1",package="1"} 9
# HELP node_cpu_frequency_hertz Current cpu thread frequency in hertz.
# TYPE node_cpu_frequency_hertz gauge
node_cpu_frequency_hertz{cpu="0"} 1.699981e+09
node_cpu_frequency_hertz{cpu="1"} 1.699981e+09
node_cpu_frequency_hertz{cpu="2"} 8e+06
node_cpu_frequency_hertz{cpu="3"} 8e+06
# HELP node_cpu_frequency_max_hertz Maximum cpu thread frequency in hertz.
# TYPE node_cpu_frequency_max_hertz gauge
node_cpu_frequency_max_hertz{cpu="0"} 3.7e+09
node_cpu_frequency_max_hertz{cpu="1"} 3.7e+09
node_cpu_frequency_max_hertz{cpu="2"} 4.2e+09
node_cpu_frequency_max_hertz{cpu="3"} 4.2e+09
# HELP node_cpu_frequency_min_hertz Minimum cpu thread frequency in hertz.
# TYPE node_cpu_frequency_min_hertz gauge
node_cpu_frequency_min_hertz{cpu="0"} 8e+08
node_cpu_frequency_min_hertz{cpu="1"} 8e+08
node_cpu_frequency_min_hertz{cpu="2"} 1e+06
node_cpu_frequency_min_hertz{cpu="3"} 1e+06
# HELP node_cpu_guest_seconds_total Seconds the cpus spent in guests (VMs) for each mode.
# TYPE node_cpu_guest_seconds_total counter
@ -217,7 +222,8 @@ node_cpu_guest_seconds_total{cpu="7",mode="nice"} 0.08
node_cpu_guest_seconds_total{cpu="7",mode="user"} 0.09
# HELP node_cpu_package_throttles_total Number of times this cpu package has been throttled.
# TYPE node_cpu_package_throttles_total counter
node_cpu_package_throttles_total{node="0"} 30
node_cpu_package_throttles_total{package="0"} 30
node_cpu_package_throttles_total{package="1"} 6
# HELP node_cpu_seconds_total Seconds the cpus spent in each mode.
# TYPE node_cpu_seconds_total counter
node_cpu_seconds_total{cpu="0",mode="idle"} 10870.69
@ -1219,142 +1225,177 @@ node_memory_Writeback_bytes 0
# TYPE node_memory_numa_Active gauge
node_memory_numa_Active{node="0"} 5.58733312e+09
node_memory_numa_Active{node="1"} 5.739003904e+09
node_memory_numa_Active{node="2"} 5.739003904e+09
# HELP node_memory_numa_Active_anon Memory information field Active_anon.
# TYPE node_memory_numa_Active_anon gauge
node_memory_numa_Active_anon{node="0"} 7.07915776e+08
node_memory_numa_Active_anon{node="1"} 6.04635136e+08
node_memory_numa_Active_anon{node="2"} 6.04635136e+08
# HELP node_memory_numa_Active_file Memory information field Active_file.
# TYPE node_memory_numa_Active_file gauge
node_memory_numa_Active_file{node="0"} 4.879417344e+09
node_memory_numa_Active_file{node="1"} 5.134368768e+09
node_memory_numa_Active_file{node="2"} 5.134368768e+09
# HELP node_memory_numa_AnonHugePages Memory information field AnonHugePages.
# TYPE node_memory_numa_AnonHugePages gauge
node_memory_numa_AnonHugePages{node="0"} 1.50994944e+08
node_memory_numa_AnonHugePages{node="1"} 9.2274688e+07
node_memory_numa_AnonHugePages{node="2"} 9.2274688e+07
# HELP node_memory_numa_AnonPages Memory information field AnonPages.
# TYPE node_memory_numa_AnonPages gauge
node_memory_numa_AnonPages{node="0"} 8.07112704e+08
node_memory_numa_AnonPages{node="1"} 6.88058368e+08
node_memory_numa_AnonPages{node="2"} 6.88058368e+08
# HELP node_memory_numa_Bounce Memory information field Bounce.
# TYPE node_memory_numa_Bounce gauge
node_memory_numa_Bounce{node="0"} 0
node_memory_numa_Bounce{node="1"} 0
node_memory_numa_Bounce{node="2"} 0
# HELP node_memory_numa_Dirty Memory information field Dirty.
# TYPE node_memory_numa_Dirty gauge
node_memory_numa_Dirty{node="0"} 20480
node_memory_numa_Dirty{node="1"} 122880
node_memory_numa_Dirty{node="2"} 122880
# HELP node_memory_numa_FilePages Memory information field FilePages.
# TYPE node_memory_numa_FilePages gauge
node_memory_numa_FilePages{node="0"} 7.1855017984e+10
node_memory_numa_FilePages{node="1"} 8.5585088512e+10
node_memory_numa_FilePages{node="2"} 8.5585088512e+10
# HELP node_memory_numa_HugePages_Free Memory information field HugePages_Free.
# TYPE node_memory_numa_HugePages_Free gauge
node_memory_numa_HugePages_Free{node="0"} 0
node_memory_numa_HugePages_Free{node="1"} 0
node_memory_numa_HugePages_Free{node="2"} 0
# HELP node_memory_numa_HugePages_Surp Memory information field HugePages_Surp.
# TYPE node_memory_numa_HugePages_Surp gauge
node_memory_numa_HugePages_Surp{node="0"} 0
node_memory_numa_HugePages_Surp{node="1"} 0
node_memory_numa_HugePages_Surp{node="2"} 0
# HELP node_memory_numa_HugePages_Total Memory information field HugePages_Total.
# TYPE node_memory_numa_HugePages_Total gauge
node_memory_numa_HugePages_Total{node="0"} 0
node_memory_numa_HugePages_Total{node="1"} 0
node_memory_numa_HugePages_Total{node="2"} 0
# HELP node_memory_numa_Inactive Memory information field Inactive.
# TYPE node_memory_numa_Inactive gauge
node_memory_numa_Inactive{node="0"} 6.0569788416e+10
node_memory_numa_Inactive{node="1"} 7.3165406208e+10
node_memory_numa_Inactive{node="2"} 7.3165406208e+10
# HELP node_memory_numa_Inactive_anon Memory information field Inactive_anon.
# TYPE node_memory_numa_Inactive_anon gauge
node_memory_numa_Inactive_anon{node="0"} 3.48626944e+08
node_memory_numa_Inactive_anon{node="1"} 2.91930112e+08
node_memory_numa_Inactive_anon{node="2"} 2.91930112e+08
# HELP node_memory_numa_Inactive_file Memory information field Inactive_file.
# TYPE node_memory_numa_Inactive_file gauge
node_memory_numa_Inactive_file{node="0"} 6.0221161472e+10
node_memory_numa_Inactive_file{node="1"} 7.2873476096e+10
node_memory_numa_Inactive_file{node="2"} 7.2873476096e+10
# HELP node_memory_numa_KernelStack Memory information field KernelStack.
# TYPE node_memory_numa_KernelStack gauge
node_memory_numa_KernelStack{node="0"} 3.4832384e+07
node_memory_numa_KernelStack{node="1"} 3.1850496e+07
node_memory_numa_KernelStack{node="2"} 3.1850496e+07
# HELP node_memory_numa_Mapped Memory information field Mapped.
# TYPE node_memory_numa_Mapped gauge
node_memory_numa_Mapped{node="0"} 9.1570176e+08
node_memory_numa_Mapped{node="1"} 8.84850688e+08
node_memory_numa_Mapped{node="2"} 8.84850688e+08
# HELP node_memory_numa_MemFree Memory information field MemFree.
# TYPE node_memory_numa_MemFree gauge
node_memory_numa_MemFree{node="0"} 5.4303100928e+10
node_memory_numa_MemFree{node="1"} 4.0586022912e+10
node_memory_numa_MemFree{node="2"} 4.0586022912e+10
# HELP node_memory_numa_MemTotal Memory information field MemTotal.
# TYPE node_memory_numa_MemTotal gauge
node_memory_numa_MemTotal{node="0"} 1.3740271616e+11
node_memory_numa_MemTotal{node="1"} 1.37438953472e+11
node_memory_numa_MemTotal{node="2"} 1.37438953472e+11
# HELP node_memory_numa_MemUsed Memory information field MemUsed.
# TYPE node_memory_numa_MemUsed gauge
node_memory_numa_MemUsed{node="0"} 8.3099615232e+10
node_memory_numa_MemUsed{node="1"} 9.685293056e+10
node_memory_numa_MemUsed{node="2"} 9.685293056e+10
# HELP node_memory_numa_Mlocked Memory information field Mlocked.
# TYPE node_memory_numa_Mlocked gauge
node_memory_numa_Mlocked{node="0"} 0
node_memory_numa_Mlocked{node="1"} 0
node_memory_numa_Mlocked{node="2"} 0
# HELP node_memory_numa_NFS_Unstable Memory information field NFS_Unstable.
# TYPE node_memory_numa_NFS_Unstable gauge
node_memory_numa_NFS_Unstable{node="0"} 0
node_memory_numa_NFS_Unstable{node="1"} 0
node_memory_numa_NFS_Unstable{node="2"} 0
# HELP node_memory_numa_PageTables Memory information field PageTables.
# TYPE node_memory_numa_PageTables gauge
node_memory_numa_PageTables{node="0"} 1.46743296e+08
node_memory_numa_PageTables{node="1"} 1.27254528e+08
node_memory_numa_PageTables{node="2"} 1.27254528e+08
# HELP node_memory_numa_SReclaimable Memory information field SReclaimable.
# TYPE node_memory_numa_SReclaimable gauge
node_memory_numa_SReclaimable{node="0"} 4.580478976e+09
node_memory_numa_SReclaimable{node="1"} 4.724822016e+09
node_memory_numa_SReclaimable{node="2"} 4.724822016e+09
# HELP node_memory_numa_SUnreclaim Memory information field SUnreclaim.
# TYPE node_memory_numa_SUnreclaim gauge
node_memory_numa_SUnreclaim{node="0"} 2.23352832e+09
node_memory_numa_SUnreclaim{node="1"} 2.464391168e+09
node_memory_numa_SUnreclaim{node="2"} 2.464391168e+09
# HELP node_memory_numa_Shmem Memory information field Shmem.
# TYPE node_memory_numa_Shmem gauge
node_memory_numa_Shmem{node="0"} 4.900864e+07
node_memory_numa_Shmem{node="1"} 8.968192e+07
node_memory_numa_Shmem{node="2"} 8.968192e+07
# HELP node_memory_numa_Slab Memory information field Slab.
# TYPE node_memory_numa_Slab gauge
node_memory_numa_Slab{node="0"} 6.814007296e+09
node_memory_numa_Slab{node="1"} 7.189213184e+09
node_memory_numa_Slab{node="2"} 7.189213184e+09
# HELP node_memory_numa_Unevictable Memory information field Unevictable.
# TYPE node_memory_numa_Unevictable gauge
node_memory_numa_Unevictable{node="0"} 0
node_memory_numa_Unevictable{node="1"} 0
node_memory_numa_Unevictable{node="2"} 0
# HELP node_memory_numa_Writeback Memory information field Writeback.
# TYPE node_memory_numa_Writeback gauge
node_memory_numa_Writeback{node="0"} 0
node_memory_numa_Writeback{node="1"} 0
node_memory_numa_Writeback{node="2"} 0
# HELP node_memory_numa_WritebackTmp Memory information field WritebackTmp.
# TYPE node_memory_numa_WritebackTmp gauge
node_memory_numa_WritebackTmp{node="0"} 0
node_memory_numa_WritebackTmp{node="1"} 0
node_memory_numa_WritebackTmp{node="2"} 0
# HELP node_memory_numa_interleave_hit_total Memory information field interleave_hit_total.
# TYPE node_memory_numa_interleave_hit_total counter
node_memory_numa_interleave_hit_total{node="0"} 57146
node_memory_numa_interleave_hit_total{node="1"} 57286
node_memory_numa_interleave_hit_total{node="2"} 7286
# HELP node_memory_numa_local_node_total Memory information field local_node_total.
# TYPE node_memory_numa_local_node_total counter
node_memory_numa_local_node_total{node="0"} 1.93454780853e+11
node_memory_numa_local_node_total{node="1"} 3.2671904655e+11
node_memory_numa_local_node_total{node="2"} 2.671904655e+10
# HELP node_memory_numa_numa_foreign_total Memory information field numa_foreign_total.
# TYPE node_memory_numa_numa_foreign_total counter
node_memory_numa_numa_foreign_total{node="0"} 5.98586233e+10
node_memory_numa_numa_foreign_total{node="1"} 1.2624528e+07
node_memory_numa_numa_foreign_total{node="2"} 2.624528e+06
# HELP node_memory_numa_numa_hit_total Memory information field numa_hit_total.
# TYPE node_memory_numa_numa_hit_total counter
node_memory_numa_numa_hit_total{node="0"} 1.93460335812e+11
node_memory_numa_numa_hit_total{node="1"} 3.26720946761e+11
node_memory_numa_numa_hit_total{node="2"} 2.6720946761e+10
# HELP node_memory_numa_numa_miss_total Memory information field numa_miss_total.
# TYPE node_memory_numa_numa_miss_total counter
node_memory_numa_numa_miss_total{node="0"} 1.2624528e+07
node_memory_numa_numa_miss_total{node="1"} 5.9858626709e+10
node_memory_numa_numa_miss_total{node="2"} 9.858626709e+09
# HELP node_memory_numa_other_node_total Memory information field other_node_total.
# TYPE node_memory_numa_other_node_total counter
node_memory_numa_other_node_total{node="0"} 1.8179487e+07
node_memory_numa_other_node_total{node="1"} 5.986052692e+10
node_memory_numa_other_node_total{node="2"} 9.86052692e+09
# HELP node_mountstats_nfs_age_seconds_total The age of the NFS mount in seconds.
# TYPE node_mountstats_nfs_age_seconds_total counter
node_mountstats_nfs_age_seconds_total{export="192.168.1.1:/srv/test"} 13968

451
collector/fixtures/sys.ttar
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@ -11,142 +11,17 @@ Mode: 755
Directory: sys/bus/cpu/devices
Mode: 755
# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Directory: sys/bus/cpu/devices/cpu0
Mode: 755
# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Directory: sys/bus/cpu/devices/cpu0/cpufreq
Mode: 755
# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Path: sys/bus/cpu/devices/cpu0/cpufreq/scaling_cur_freq
Lines: 1
1699981
Mode: 644
# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Path: sys/bus/cpu/devices/cpu0/cpufreq/scaling_max_freq
Lines: 1
3700000
Mode: 644
# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Path: sys/bus/cpu/devices/cpu0/cpufreq/scaling_min_freq
Lines: 1
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