// SPDX-License-Identifier: GPL-2.0-only
/*
* Support Intel / AMD RAPL energy consumption counters
* Copyright ( C ) 2013 Google , Inc . , Stephane Eranian
*
* Intel RAPL interface is specified in the IA - 32 Manual Vol3b
* section 14 . 7 . 1 ( September 2013 )
*
* AMD RAPL interface for Fam17h is described in the public PPR :
* https : //bugzilla.kernel.org/show_bug.cgi?id=206537
*
* RAPL provides more controls than just reporting energy consumption
* however here we only expose the 3 energy consumption free running
* counters ( pp0 , pkg , dram ) .
*
* Each of those counters increments in a power unit defined by the
* RAPL_POWER_UNIT MSR . On SandyBridge , this unit is 1 / ( 2 ^ 16 ) Joules
* but it can vary .
*
* Counter to rapl events mappings :
*
* pp0 counter : consumption of all physical cores ( power plane 0 )
* event : rapl_energy_cores
* perf code : 0 x1
*
* pkg counter : consumption of the whole processor package
* event : rapl_energy_pkg
* perf code : 0 x2
*
* dram counter : consumption of the dram domain ( servers only )
* event : rapl_energy_dram
* perf code : 0 x3
*
* gpu counter : consumption of the builtin - gpu domain ( client only )
* event : rapl_energy_gpu
* perf code : 0 x4
*
* psys counter : consumption of the builtin - psys domain ( client only )
* event : rapl_energy_psys
* perf code : 0 x5
*
* core counter : consumption of a single physical core
* event : rapl_energy_core ( power_core PMU )
* perf code : 0 x1
*
* We manage those counters as free running ( read - only ) . They may be
* use simultaneously by other tools , such as turbostat .
*
* The events only support system - wide mode counting . There is no
* sampling support because it does not make sense and is not
* supported by the RAPL hardware .
*
* Because we want to avoid floating - point operations in the kernel ,
* the events are all reported in fixed point arithmetic ( 32 . 32 ) .
* Tools must adjust the counts to convert them to Watts using
* the duration of the measurement . Tools may use a function such as
* ldexp ( raw_count , - 32 ) ;
*/
#define pr_fmt(fmt) "RAPL PMU: " fmt
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/perf_event.h>
#include <linux/nospec.h>
#include <asm /cpu_device_id.h>
#include <asm /intel-family.h>
#include <asm /msr.h>
#include "perf_event.h"
#include "probe.h"
MODULE_DESCRIPTION("Support Intel/AMD RAPL energy consumption counters" );
MODULE_LICENSE("GPL" );
/*
* RAPL energy status counters
*/
enum perf_rapl_pkg_events {
PERF_RAPL_PP0 = 0 , /* all cores */
PERF_RAPL_PKG, /* entire package */
PERF_RAPL_RAM, /* DRAM */
PERF_RAPL_PP1, /* gpu */
PERF_RAPL_PSYS, /* psys */
PERF_RAPL_PKG_EVENTS_MAX,
NR_RAPL_PKG_DOMAINS = PERF_RAPL_PKG_EVENTS_MAX,
};
#define PERF_RAPL_CORE 0 /* single core */
#define PERF_RAPL_CORE_EVENTS_MAX 1
#define NR_RAPL_CORE_DOMAINS PERF_RAPL_CORE_EVENTS_MAX
static const char *const rapl_pkg_domain_names[NR_RAPL_PKG_DOMAINS] __initconst = {
"pp0-core" ,
"package" ,
"dram" ,
"pp1-gpu" ,
"psys" ,
};
static const char *const rapl_core_domain_name __initconst = "core" ;
/*
* event code : LSB 8 bits , passed in attr - > config
* any other bit is reserved
*/
#define RAPL_EVENT_MASK 0 xFFULL
#define RAPL_CNTR_WIDTH 32
#define RAPL_EVENT_ATTR_STR(_name, v, str) \
static struct perf_pmu_events_attr event_attr_## v = { \
.attr = __ATTR(_name, 0444 , perf_event_sysfs_show, NULL), \
.id = 0 , \
.event_str = str, \
};
/*
* RAPL Package energy counter scope :
* 1 . AMD / HYGON platforms have a per - PKG package energy counter
* 2 . For Intel platforms
* 2 . 1 . CLX - AP is multi - die and its RAPL MSRs are die - scope
* 2 . 2 . Other Intel platforms are single die systems so the scope can be
* considered as either pkg - scope or die - scope , and we are considering
* them as die - scope .
*/
#define rapl_pkg_pmu_is_pkg_scope() \
(boot_cpu_data.x86_vendor == X86_VENDOR_AMD || \
boot_cpu_data.x86_vendor == X86_VENDOR_HYGON)
struct rapl_pmu {
raw_spinlock_t lock;
int n_active;
int cpu;
struct list_head active_list;
struct pmu *pmu;
ktime_t timer_interval;
struct hrtimer hrtimer;
};
struct rapl_pmus {
struct pmu pmu;
unsigned int nr_rapl_pmu;
unsigned int cntr_mask;
struct rapl_pmu *rapl_pmu[] __counted_by(nr_rapl_pmu);
};
enum rapl_unit_quirk {
RAPL_UNIT_QUIRK_NONE,
RAPL_UNIT_QUIRK_INTEL_HSW,
RAPL_UNIT_QUIRK_INTEL_SPR,
};
struct rapl_model {
struct perf_msr *rapl_pkg_msrs;
struct perf_msr *rapl_core_msrs;
unsigned long pkg_events;
unsigned long core_events;
unsigned int msr_power_unit;
enum rapl_unit_quirk unit_quirk;
};
/* 1/2^hw_unit Joule */
static int rapl_pkg_hw_unit[NR_RAPL_PKG_DOMAINS] __read_mostly;
static int rapl_core_hw_unit __read_mostly;
static struct rapl_pmus *rapl_pmus_pkg;
static struct rapl_pmus *rapl_pmus_core;
static u64 rapl_timer_ms;
static struct rapl_model *rapl_model;
/*
* Helper function to get the correct topology id according to the
* RAPL PMU scope .
*/
static inline unsigned int get_rapl_pmu_idx(int cpu, int scope)
{
/*
* Returns unsigned int , which converts the ' - 1 ' return value
* ( for non - existent mappings in topology map ) to UINT_MAX , so
* the error check in the caller is simplified .
*/
switch (scope) {
case PERF_PMU_SCOPE_PKG:
return topology_logical_package_id(cpu);
case PERF_PMU_SCOPE_DIE:
return topology_logical_die_id(cpu);
case PERF_PMU_SCOPE_CORE:
return topology_logical_core_id(cpu);
default :
return -EINVAL;
}
}
static inline u64 rapl_read_counter(struct perf_event *event)
{
u64 raw;
rdmsrq(event->hw.event_base, raw);
return raw;
}
static inline u64 rapl_scale(u64 v, struct perf_event *event)
{
int hw_unit = rapl_pkg_hw_unit[event->hw.config - 1 ];
if (event->pmu->scope == PERF_PMU_SCOPE_CORE)
hw_unit = rapl_core_hw_unit;
/*
* scale delta to smallest unit ( 1 / 2 ^ 32 )
* users must then scale back : count * 1 / ( 1 e9 * 2 ^ 32 ) to get Joules
* or use ldexp ( count , - 32 ) .
* Watts = Joules / Time delta
*/
return v << (32 - hw_unit);
}
static u64 rapl_event_update(struct perf_event *event)
{
struct hw_perf_event *hwc = &event->hw;
u64 prev_raw_count, new_raw_count;
s64 delta, sdelta;
int shift = RAPL_CNTR_WIDTH;
prev_raw_count = local64_read(&hwc->prev_count);
do {
rdmsrq(event->hw.event_base, new_raw_count);
} while (!local64_try_cmpxchg(&hwc->prev_count,
&prev_raw_count, new_raw_count));
/*
* Now we have the new raw value and have updated the prev
* timestamp already . We can now calculate the elapsed delta
* ( event - ) time and add that to the generic event .
*
* Careful , not all hw sign - extends above the physical width
* of the count .
*/
delta = (new_raw_count << shift) - (prev_raw_count << shift);
delta >>= shift;
sdelta = rapl_scale(delta, event);
local64_add(sdelta, &event->count);
return new_raw_count;
}
static void rapl_start_hrtimer(struct rapl_pmu *pmu)
{
hrtimer_start(&pmu->hrtimer, pmu->timer_interval,
HRTIMER_MODE_REL_PINNED);
}
static enum hrtimer_restart rapl_hrtimer_handle(struct hrtimer *hrtimer)
{
struct rapl_pmu *rapl_pmu = container_of(hrtimer, struct rapl_pmu, hrtimer);
struct perf_event *event;
unsigned long flags;
if (!rapl_pmu->n_active)
return HRTIMER_NORESTART;
raw_spin_lock_irqsave(&rapl_pmu->lock, flags);
list_for_each_entry(event, &rapl_pmu->active_list, active_entry)
rapl_event_update(event);
raw_spin_unlock_irqrestore(&rapl_pmu->lock, flags);
hrtimer_forward_now(hrtimer, rapl_pmu->timer_interval);
return HRTIMER_RESTART;
}
static void rapl_hrtimer_init(struct rapl_pmu *rapl_pmu)
{
struct hrtimer *hr = &rapl_pmu->hrtimer;
hrtimer_setup(hr, rapl_hrtimer_handle, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
}
static void __rapl_pmu_event_start(struct rapl_pmu *rapl_pmu,
struct perf_event *event)
{
if (WARN_ON_ONCE(!(event->hw.state & PERF_HES_STOPPED)))
return ;
event->hw.state = 0 ;
list_add_tail(&event->active_entry, &rapl_pmu->active_list);
local64_set(&event->hw.prev_count, rapl_read_counter(event));
rapl_pmu->n_active++;
if (rapl_pmu->n_active == 1 )
rapl_start_hrtimer(rapl_pmu);
}
static void rapl_pmu_event_start(struct perf_event *event, int mode)
{
struct rapl_pmu *rapl_pmu = event->pmu_private;
unsigned long flags;
raw_spin_lock_irqsave(&rapl_pmu->lock, flags);
__rapl_pmu_event_start(rapl_pmu, event);
raw_spin_unlock_irqrestore(&rapl_pmu->lock, flags);
}
static void rapl_pmu_event_stop(struct perf_event *event, int mode)
{
struct rapl_pmu *rapl_pmu = event->pmu_private;
struct hw_perf_event *hwc = &event->hw;
unsigned long flags;
raw_spin_lock_irqsave(&rapl_pmu->lock, flags);
/* mark event as deactivated and stopped */
if (!(hwc->state & PERF_HES_STOPPED)) {
WARN_ON_ONCE(rapl_pmu->n_active <= 0 );
rapl_pmu->n_active--;
if (rapl_pmu->n_active == 0 )
hrtimer_cancel(&rapl_pmu->hrtimer);
list_del(&event->active_entry);
WARN_ON_ONCE(hwc->state & PERF_HES_STOPPED);
hwc->state |= PERF_HES_STOPPED;
}
/* check if update of sw counter is necessary */
if ((mode & PERF_EF_UPDATE) && !(hwc->state & PERF_HES_UPTODATE)) {
/*
* Drain the remaining delta count out of a event
* that we are disabling :
*/
rapl_event_update(event);
hwc->state |= PERF_HES_UPTODATE;
}
raw_spin_unlock_irqrestore(&rapl_pmu->lock, flags);
}
static int rapl_pmu_event_add(struct perf_event *event, int mode)
{
struct rapl_pmu *rapl_pmu = event->pmu_private;
struct hw_perf_event *hwc = &event->hw;
unsigned long flags;
raw_spin_lock_irqsave(&rapl_pmu->lock, flags);
hwc->state = PERF_HES_UPTODATE | PERF_HES_STOPPED;
if (mode & PERF_EF_START)
__rapl_pmu_event_start(rapl_pmu, event);
raw_spin_unlock_irqrestore(&rapl_pmu->lock, flags);
return 0 ;
}
static void rapl_pmu_event_del(struct perf_event *event, int flags)
{
rapl_pmu_event_stop(event, PERF_EF_UPDATE);
}
static int rapl_pmu_event_init(struct perf_event *event)
{
u64 cfg = event->attr.config & RAPL_EVENT_MASK;
int bit, rapl_pmus_scope, ret = 0 ;
struct rapl_pmu *rapl_pmu;
unsigned int rapl_pmu_idx;
struct rapl_pmus *rapl_pmus;
/* only look at RAPL events */
if (event->attr.type != event->pmu->type)
return -ENOENT;
/* unsupported modes and filters */
if (event->attr.sample_period) /* no sampling */
return -EINVAL;
/* check only supported bits are set */
if (event->attr.config & ~RAPL_EVENT_MASK)
return -EINVAL;
if (event->cpu < 0 )
return -EINVAL;
rapl_pmus = container_of(event->pmu, struct rapl_pmus, pmu);
if (!rapl_pmus)
return -EINVAL;
rapl_pmus_scope = rapl_pmus->pmu.scope;
if (rapl_pmus_scope == PERF_PMU_SCOPE_PKG || rapl_pmus_scope == PERF_PMU_SCOPE_DIE) {
cfg = array_index_nospec((long )cfg, NR_RAPL_PKG_DOMAINS + 1 );
if (!cfg || cfg >= NR_RAPL_PKG_DOMAINS + 1 )
return -EINVAL;
bit = cfg - 1 ;
event->hw.event_base = rapl_model->rapl_pkg_msrs[bit].msr;
} else if (rapl_pmus_scope == PERF_PMU_SCOPE_CORE) {
cfg = array_index_nospec((long )cfg, NR_RAPL_CORE_DOMAINS + 1 );
if (!cfg || cfg >= NR_RAPL_PKG_DOMAINS + 1 )
return -EINVAL;
bit = cfg - 1 ;
event->hw.event_base = rapl_model->rapl_core_msrs[bit].msr;
} else
return -EINVAL;
/* check event supported */
if (!(rapl_pmus->cntr_mask & (1 << bit)))
return -EINVAL;
rapl_pmu_idx = get_rapl_pmu_idx(event->cpu, rapl_pmus_scope);
if (rapl_pmu_idx >= rapl_pmus->nr_rapl_pmu)
return -EINVAL;
/* must be done before validate_group */
rapl_pmu = rapl_pmus->rapl_pmu[rapl_pmu_idx];
if (!rapl_pmu)
return -EINVAL;
event->pmu_private = rapl_pmu;
event->hw.config = cfg;
event->hw.idx = bit;
return ret;
}
static void rapl_pmu_event_read(struct perf_event *event)
{
rapl_event_update(event);
}
RAPL_EVENT_ATTR_STR(energy-cores, rapl_cores, "event=0x01" );
RAPL_EVENT_ATTR_STR(energy-pkg , rapl_pkg, "event=0x02" );
RAPL_EVENT_ATTR_STR(energy-ram , rapl_ram, "event=0x03" );
RAPL_EVENT_ATTR_STR(energy-gpu , rapl_gpu, "event=0x04" );
RAPL_EVENT_ATTR_STR(energy-psys, rapl_psys, "event=0x05" );
RAPL_EVENT_ATTR_STR(energy-core, rapl_core, "event=0x01" );
RAPL_EVENT_ATTR_STR(energy-cores.unit, rapl_cores_unit, "Joules" );
RAPL_EVENT_ATTR_STR(energy-pkg.unit , rapl_pkg_unit, "Joules" );
RAPL_EVENT_ATTR_STR(energy-ram.unit , rapl_ram_unit, "Joules" );
RAPL_EVENT_ATTR_STR(energy-gpu.unit , rapl_gpu_unit, "Joules" );
RAPL_EVENT_ATTR_STR(energy-psys.unit, rapl_psys_unit, "Joules" );
RAPL_EVENT_ATTR_STR(energy-core.unit, rapl_core_unit, "Joules" );
/*
* we compute in 0 . 23 nJ increments regardless of MSR
*/
RAPL_EVENT_ATTR_STR(energy-cores.scale, rapl_cores_scale, "2.3283064365386962890625e-10" );
RAPL_EVENT_ATTR_STR(energy-pkg.scale, rapl_pkg_scale, "2.3283064365386962890625e-10" );
RAPL_EVENT_ATTR_STR(energy-ram.scale, rapl_ram_scale, "2.3283064365386962890625e-10" );
RAPL_EVENT_ATTR_STR(energy-gpu.scale, rapl_gpu_scale, "2.3283064365386962890625e-10" );
RAPL_EVENT_ATTR_STR(energy-psys.scale, rapl_psys_scale, "2.3283064365386962890625e-10" );
RAPL_EVENT_ATTR_STR(energy-core.scale, rapl_core_scale, "2.3283064365386962890625e-10" );
/*
* There are no default events , but we need to create
* " events " group ( with empty attrs ) before updating
* it with detected events .
*/
static struct attribute *attrs_empty[] = {
NULL,
};
static struct attribute_group rapl_pmu_events_group = {
.name = "events" ,
.attrs = attrs_empty,
};
PMU_FORMAT_ATTR(event, "config:0-7" );
static struct attribute *rapl_formats_attr[] = {
&format_attr_event.attr,
NULL,
};
static struct attribute_group rapl_pmu_format_group = {
.name = "format" ,
.attrs = rapl_formats_attr,
};
static const struct attribute_group *rapl_attr_groups[] = {
&rapl_pmu_format_group,
&rapl_pmu_events_group,
NULL,
};
static const struct attribute_group *rapl_core_attr_groups[] = {
&rapl_pmu_format_group,
&rapl_pmu_events_group,
NULL,
};
static struct attribute *rapl_events_cores[] = {
EVENT_PTR(rapl_cores),
EVENT_PTR(rapl_cores_unit),
EVENT_PTR(rapl_cores_scale),
NULL,
};
static struct attribute_group rapl_events_cores_group = {
.name = "events" ,
.attrs = rapl_events_cores,
};
static struct attribute *rapl_events_pkg[] = {
EVENT_PTR(rapl_pkg),
EVENT_PTR(rapl_pkg_unit),
EVENT_PTR(rapl_pkg_scale),
NULL,
};
static struct attribute_group rapl_events_pkg_group = {
.name = "events" ,
.attrs = rapl_events_pkg,
};
static struct attribute *rapl_events_ram[] = {
EVENT_PTR(rapl_ram),
EVENT_PTR(rapl_ram_unit),
EVENT_PTR(rapl_ram_scale),
NULL,
};
static struct attribute_group rapl_events_ram_group = {
.name = "events" ,
.attrs = rapl_events_ram,
};
static struct attribute *rapl_events_gpu[] = {
EVENT_PTR(rapl_gpu),
EVENT_PTR(rapl_gpu_unit),
EVENT_PTR(rapl_gpu_scale),
NULL,
};
static struct attribute_group rapl_events_gpu_group = {
.name = "events" ,
.attrs = rapl_events_gpu,
};
static struct attribute *rapl_events_psys[] = {
EVENT_PTR(rapl_psys),
EVENT_PTR(rapl_psys_unit),
EVENT_PTR(rapl_psys_scale),
NULL,
};
static struct attribute_group rapl_events_psys_group = {
.name = "events" ,
.attrs = rapl_events_psys,
};
static struct attribute *rapl_events_core[] = {
EVENT_PTR(rapl_core),
EVENT_PTR(rapl_core_unit),
EVENT_PTR(rapl_core_scale),
NULL,
};
static struct attribute_group rapl_events_core_group = {
.name = "events" ,
.attrs = rapl_events_core,
};
static bool test_msr(int idx, void *data)
{
return test_bit(idx, (unsigned long *) data);
}
/* Only lower 32bits of the MSR represents the energy counter */
#define RAPL_MSR_MASK 0 xFFFFFFFF
static struct perf_msr intel_rapl_msrs[] = {
[PERF_RAPL_PP0] = { MSR_PP0_ENERGY_STATUS, &rapl_events_cores_group, test_msr, false , RAPL_MSR_MASK },
[PERF_RAPL_PKG] = { MSR_PKG_ENERGY_STATUS, &rapl_events_pkg_group, test_msr, false , RAPL_MSR_MASK },
[PERF_RAPL_RAM] = { MSR_DRAM_ENERGY_STATUS, &rapl_events_ram_group, test_msr, false , RAPL_MSR_MASK },
[PERF_RAPL_PP1] = { MSR_PP1_ENERGY_STATUS, &rapl_events_gpu_group, test_msr, false , RAPL_MSR_MASK },
[PERF_RAPL_PSYS] = { MSR_PLATFORM_ENERGY_STATUS, &rapl_events_psys_group, test_msr, false , RAPL_MSR_MASK },
};
static struct perf_msr intel_rapl_spr_msrs[] = {
[PERF_RAPL_PP0] = { MSR_PP0_ENERGY_STATUS, &rapl_events_cores_group, test_msr, false , RAPL_MSR_MASK },
[PERF_RAPL_PKG] = { MSR_PKG_ENERGY_STATUS, &rapl_events_pkg_group, test_msr, false , RAPL_MSR_MASK },
[PERF_RAPL_RAM] = { MSR_DRAM_ENERGY_STATUS, &rapl_events_ram_group, test_msr, false , RAPL_MSR_MASK },
[PERF_RAPL_PP1] = { MSR_PP1_ENERGY_STATUS, &rapl_events_gpu_group, test_msr, false , RAPL_MSR_MASK },
[PERF_RAPL_PSYS] = { MSR_PLATFORM_ENERGY_STATUS, &rapl_events_psys_group, test_msr, true , RAPL_MSR_MASK },
};
/*
* Force to PERF_RAPL_PKG_EVENTS_MAX size due to :
* - perf_msr_probe ( PERF_RAPL_PKG_EVENTS_MAX )
* - want to use same event codes across both architectures
*/
static struct perf_msr amd_rapl_pkg_msrs[] = {
[PERF_RAPL_PP0] = { 0 , &rapl_events_cores_group, NULL, false , 0 },
[PERF_RAPL_PKG] = { MSR_AMD_PKG_ENERGY_STATUS, &rapl_events_pkg_group, test_msr, false , RAPL_MSR_MASK },
[PERF_RAPL_RAM] = { 0 , &rapl_events_ram_group, NULL, false , 0 },
[PERF_RAPL_PP1] = { 0 , &rapl_events_gpu_group, NULL, false , 0 },
[PERF_RAPL_PSYS] = { 0 , &rapl_events_psys_group, NULL, false , 0 },
};
static struct perf_msr amd_rapl_core_msrs[] = {
[PERF_RAPL_CORE] = { MSR_AMD_CORE_ENERGY_STATUS, &rapl_events_core_group,
test_msr, false , RAPL_MSR_MASK },
};
static int rapl_check_hw_unit(void )
{
u64 msr_rapl_power_unit_bits;
int i;
/* protect rdmsrq() to handle virtualization */
if (rdmsrq_safe(rapl_model->msr_power_unit, &msr_rapl_power_unit_bits))
return -1 ;
for (i = 0 ; i < NR_RAPL_PKG_DOMAINS; i++)
rapl_pkg_hw_unit[i] = (msr_rapl_power_unit_bits >> 8 ) & 0 x1FULL;
rapl_core_hw_unit = (msr_rapl_power_unit_bits >> 8 ) & 0 x1FULL;
switch (rapl_model->unit_quirk) {
/*
* DRAM domain on HSW server and KNL has fixed energy unit which can be
* different than the unit from power unit MSR . See
* " Intel Xeon Processor E5 - 1600 and E5 - 2600 v3 Product Families , V2
* of 2 . Datasheet , September 2014 , Reference Number : 330784 - 001 "
*/
case RAPL_UNIT_QUIRK_INTEL_HSW:
rapl_pkg_hw_unit[PERF_RAPL_RAM] = 16 ;
break ;
/* SPR uses a fixed energy unit for Psys domain. */
case RAPL_UNIT_QUIRK_INTEL_SPR:
rapl_pkg_hw_unit[PERF_RAPL_PSYS] = 0 ;
break ;
default :
break ;
}
/*
* Calculate the timer rate :
* Use reference of 200 W for scaling the timeout to avoid counter
* overflows . 200 W = 200 Joules / sec
* Divide interval by 2 to avoid lockstep ( 2 * 100 )
* if hw unit is 32 , then we use 2 ms 1 / 200 / 2
*/
rapl_timer_ms = 2 ;
if (rapl_pkg_hw_unit[0 ] < 32 ) {
rapl_timer_ms = (1000 / (2 * 100 ));
rapl_timer_ms *= (1 ULL << (32 - rapl_pkg_hw_unit[0 ] - 1 ));
}
return 0 ;
}
static void __init rapl_advertise(void )
{
int i;
int num_counters = hweight32(rapl_pmus_pkg->cntr_mask);
if (rapl_pmus_core)
num_counters += hweight32(rapl_pmus_core->cntr_mask);
pr_info("API unit is 2^-32 Joules, %d fixed counters, %llu ms ovfl timer\n" ,
num_counters, rapl_timer_ms);
for (i = 0 ; i < NR_RAPL_PKG_DOMAINS; i++) {
if (rapl_pmus_pkg->cntr_mask & (1 << i)) {
pr_info("hw unit of domain %s 2^-%d Joules\n" ,
rapl_pkg_domain_names[i], rapl_pkg_hw_unit[i]);
}
}
if (rapl_pmus_core && (rapl_pmus_core->cntr_mask & (1 << PERF_RAPL_CORE)))
pr_info("hw unit of domain %s 2^-%d Joules\n" ,
rapl_core_domain_name, rapl_core_hw_unit);
}
static void cleanup_rapl_pmus(struct rapl_pmus *rapl_pmus)
{
int i;
for (i = 0 ; i < rapl_pmus->nr_rapl_pmu; i++)
kfree(rapl_pmus->rapl_pmu[i]);
kfree(rapl_pmus);
}
static const struct attribute_group *rapl_attr_update[] = {
&rapl_events_cores_group,
&rapl_events_pkg_group,
&rapl_events_ram_group,
&rapl_events_gpu_group,
&rapl_events_psys_group,
NULL,
};
static const struct attribute_group *rapl_core_attr_update[] = {
&rapl_events_core_group,
NULL,
};
static int __init init_rapl_pmu(struct rapl_pmus *rapl_pmus)
{
struct rapl_pmu *rapl_pmu;
int idx;
for (idx = 0 ; idx < rapl_pmus->nr_rapl_pmu; idx++) {
rapl_pmu = kzalloc(sizeof (*rapl_pmu), GFP_KERNEL);
if (!rapl_pmu)
goto free;
raw_spin_lock_init(&rapl_pmu->lock);
INIT_LIST_HEAD(&rapl_pmu->active_list);
rapl_pmu->pmu = &rapl_pmus->pmu;
rapl_pmu->timer_interval = ms_to_ktime(rapl_timer_ms);
rapl_hrtimer_init(rapl_pmu);
rapl_pmus->rapl_pmu[idx] = rapl_pmu;
}
return 0 ;
free:
for (; idx > 0 ; idx--)
kfree(rapl_pmus->rapl_pmu[idx - 1 ]);
return -ENOMEM;
}
static int __init init_rapl_pmus(struct rapl_pmus **rapl_pmus_ptr, int rapl_pmu_scope,
const struct attribute_group **rapl_attr_groups,
const struct attribute_group **rapl_attr_update)
{
int nr_rapl_pmu = topology_max_packages();
struct rapl_pmus *rapl_pmus;
int ret;
/*
* rapl_pmu_scope must be either PKG , DIE or CORE
*/
if (rapl_pmu_scope == PERF_PMU_SCOPE_DIE)
nr_rapl_pmu *= topology_max_dies_per_package();
else if (rapl_pmu_scope == PERF_PMU_SCOPE_CORE)
nr_rapl_pmu *= topology_num_cores_per_package();
else if (rapl_pmu_scope != PERF_PMU_SCOPE_PKG)
return -EINVAL;
rapl_pmus = kzalloc(struct_size(rapl_pmus, rapl_pmu, nr_rapl_pmu), GFP_KERNEL);
if (!rapl_pmus)
return -ENOMEM;
*rapl_pmus_ptr = rapl_pmus;
rapl_pmus->nr_rapl_pmu = nr_rapl_pmu;
rapl_pmus->pmu.attr_groups = rapl_attr_groups;
rapl_pmus->pmu.attr_update = rapl_attr_update;
rapl_pmus->pmu.task_ctx_nr = perf_invalid_context;
rapl_pmus->pmu.event_init = rapl_pmu_event_init;
rapl_pmus->pmu.add = rapl_pmu_event_add;
rapl_pmus->pmu.del = rapl_pmu_event_del;
rapl_pmus->pmu.start = rapl_pmu_event_start;
rapl_pmus->pmu.stop = rapl_pmu_event_stop;
rapl_pmus->pmu.read = rapl_pmu_event_read;
rapl_pmus->pmu.scope = rapl_pmu_scope;
rapl_pmus->pmu.module = THIS_MODULE;
rapl_pmus->pmu.capabilities = PERF_PMU_CAP_NO_EXCLUDE;
ret = init_rapl_pmu(rapl_pmus);
if (ret)
kfree(rapl_pmus);
return ret;
}
static struct rapl_model model_snb = {
.pkg_events = BIT(PERF_RAPL_PP0) |
BIT(PERF_RAPL_PKG) |
BIT(PERF_RAPL_PP1),
.msr_power_unit = MSR_RAPL_POWER_UNIT,
.rapl_pkg_msrs = intel_rapl_msrs,
};
static struct rapl_model model_snbep = {
.pkg_events = BIT(PERF_RAPL_PP0) |
BIT(PERF_RAPL_PKG) |
BIT(PERF_RAPL_RAM),
.msr_power_unit = MSR_RAPL_POWER_UNIT,
.rapl_pkg_msrs = intel_rapl_msrs,
};
static struct rapl_model model_hsw = {
.pkg_events = BIT(PERF_RAPL_PP0) |
BIT(PERF_RAPL_PKG) |
BIT(PERF_RAPL_RAM) |
BIT(PERF_RAPL_PP1),
.msr_power_unit = MSR_RAPL_POWER_UNIT,
.rapl_pkg_msrs = intel_rapl_msrs,
};
static struct rapl_model model_hsx = {
.pkg_events = BIT(PERF_RAPL_PP0) |
BIT(PERF_RAPL_PKG) |
BIT(PERF_RAPL_RAM),
.unit_quirk = RAPL_UNIT_QUIRK_INTEL_HSW,
.msr_power_unit = MSR_RAPL_POWER_UNIT,
.rapl_pkg_msrs = intel_rapl_msrs,
};
static struct rapl_model model_knl = {
.pkg_events = BIT(PERF_RAPL_PKG) |
BIT(PERF_RAPL_RAM),
.unit_quirk = RAPL_UNIT_QUIRK_INTEL_HSW,
.msr_power_unit = MSR_RAPL_POWER_UNIT,
.rapl_pkg_msrs = intel_rapl_msrs,
};
static struct rapl_model model_skl = {
.pkg_events = BIT(PERF_RAPL_PP0) |
BIT(PERF_RAPL_PKG) |
BIT(PERF_RAPL_RAM) |
BIT(PERF_RAPL_PP1) |
BIT(PERF_RAPL_PSYS),
.msr_power_unit = MSR_RAPL_POWER_UNIT,
.rapl_pkg_msrs = intel_rapl_msrs,
};
static struct rapl_model model_spr = {
.pkg_events = BIT(PERF_RAPL_PP0) |
BIT(PERF_RAPL_PKG) |
BIT(PERF_RAPL_RAM) |
BIT(PERF_RAPL_PSYS),
.unit_quirk = RAPL_UNIT_QUIRK_INTEL_SPR,
.msr_power_unit = MSR_RAPL_POWER_UNIT,
.rapl_pkg_msrs = intel_rapl_spr_msrs,
};
static struct rapl_model model_amd_hygon = {
.pkg_events = BIT(PERF_RAPL_PKG),
.core_events = BIT(PERF_RAPL_CORE),
.msr_power_unit = MSR_AMD_RAPL_POWER_UNIT,
.rapl_pkg_msrs = amd_rapl_pkg_msrs,
.rapl_core_msrs = amd_rapl_core_msrs,
};
static const struct x86_cpu_id rapl_model_match[] __initconst = {
X86_MATCH_FEATURE(X86_FEATURE_RAPL, &model_amd_hygon),
X86_MATCH_VFM(INTEL_SANDYBRIDGE, &model_snb),
X86_MATCH_VFM(INTEL_SANDYBRIDGE_X, &model_snbep),
X86_MATCH_VFM(INTEL_IVYBRIDGE, &model_snb),
X86_MATCH_VFM(INTEL_IVYBRIDGE_X, &model_snbep),
X86_MATCH_VFM(INTEL_HASWELL, &model_hsw),
X86_MATCH_VFM(INTEL_HASWELL_X, &model_hsx),
X86_MATCH_VFM(INTEL_HASWELL_L, &model_hsw),
X86_MATCH_VFM(INTEL_HASWELL_G, &model_hsw),
X86_MATCH_VFM(INTEL_BROADWELL, &model_hsw),
X86_MATCH_VFM(INTEL_BROADWELL_G, &model_hsw),
X86_MATCH_VFM(INTEL_BROADWELL_X, &model_hsx),
X86_MATCH_VFM(INTEL_BROADWELL_D, &model_hsx),
X86_MATCH_VFM(INTEL_XEON_PHI_KNL, &model_knl),
X86_MATCH_VFM(INTEL_XEON_PHI_KNM, &model_knl),
X86_MATCH_VFM(INTEL_SKYLAKE_L, &model_skl),
X86_MATCH_VFM(INTEL_SKYLAKE, &model_skl),
X86_MATCH_VFM(INTEL_SKYLAKE_X, &model_hsx),
X86_MATCH_VFM(INTEL_KABYLAKE_L, &model_skl),
X86_MATCH_VFM(INTEL_KABYLAKE, &model_skl),
X86_MATCH_VFM(INTEL_CANNONLAKE_L, &model_skl),
X86_MATCH_VFM(INTEL_ATOM_GOLDMONT, &model_hsw),
X86_MATCH_VFM(INTEL_ATOM_GOLDMONT_D, &model_hsw),
X86_MATCH_VFM(INTEL_ATOM_GOLDMONT_PLUS, &model_hsw),
X86_MATCH_VFM(INTEL_ICELAKE_L, &model_skl),
X86_MATCH_VFM(INTEL_ICELAKE, &model_skl),
X86_MATCH_VFM(INTEL_ICELAKE_D, &model_hsx),
X86_MATCH_VFM(INTEL_ICELAKE_X, &model_hsx),
X86_MATCH_VFM(INTEL_COMETLAKE_L, &model_skl),
X86_MATCH_VFM(INTEL_COMETLAKE, &model_skl),
X86_MATCH_VFM(INTEL_TIGERLAKE_L, &model_skl),
X86_MATCH_VFM(INTEL_TIGERLAKE, &model_skl),
X86_MATCH_VFM(INTEL_ALDERLAKE, &model_skl),
X86_MATCH_VFM(INTEL_ALDERLAKE_L, &model_skl),
X86_MATCH_VFM(INTEL_ATOM_GRACEMONT, &model_skl),
X86_MATCH_VFM(INTEL_SAPPHIRERAPIDS_X, &model_spr),
X86_MATCH_VFM(INTEL_EMERALDRAPIDS_X, &model_spr),
X86_MATCH_VFM(INTEL_RAPTORLAKE, &model_skl),
X86_MATCH_VFM(INTEL_RAPTORLAKE_P, &model_skl),
X86_MATCH_VFM(INTEL_RAPTORLAKE_S, &model_skl),
X86_MATCH_VFM(INTEL_METEORLAKE, &model_skl),
X86_MATCH_VFM(INTEL_METEORLAKE_L, &model_skl),
X86_MATCH_VFM(INTEL_ARROWLAKE_H, &model_skl),
X86_MATCH_VFM(INTEL_ARROWLAKE, &model_skl),
X86_MATCH_VFM(INTEL_ARROWLAKE_U, &model_skl),
X86_MATCH_VFM(INTEL_LUNARLAKE_M, &model_skl),
{},
};
MODULE_DEVICE_TABLE(x86cpu, rapl_model_match);
static int __init rapl_pmu_init(void )
{
const struct x86_cpu_id *id;
int rapl_pkg_pmu_scope = PERF_PMU_SCOPE_DIE;
int ret;
if (rapl_pkg_pmu_is_pkg_scope())
rapl_pkg_pmu_scope = PERF_PMU_SCOPE_PKG;
id = x86_match_cpu(rapl_model_match);
if (!id)
return -ENODEV;
rapl_model = (struct rapl_model *) id->driver_data;
ret = rapl_check_hw_unit();
if (ret)
return ret;
ret = init_rapl_pmus(&rapl_pmus_pkg, rapl_pkg_pmu_scope, rapl_attr_groups,
rapl_attr_update);
if (ret)
return ret;
rapl_pmus_pkg->cntr_mask = perf_msr_probe(rapl_model->rapl_pkg_msrs,
PERF_RAPL_PKG_EVENTS_MAX, false ,
(void *) &rapl_model->pkg_events);
ret = perf_pmu_register(&rapl_pmus_pkg->pmu, "power" , -1 );
if (ret)
goto out;
if (rapl_model->core_events) {
ret = init_rapl_pmus(&rapl_pmus_core, PERF_PMU_SCOPE_CORE,
rapl_core_attr_groups,
rapl_core_attr_update);
if (ret) {
pr_warn("power-core PMU initialization failed (%d)\n" , ret);
goto core_init_failed;
}
rapl_pmus_core->cntr_mask = perf_msr_probe(rapl_model->rapl_core_msrs,
PERF_RAPL_CORE_EVENTS_MAX, false ,
(void *) &rapl_model->core_events);
ret = perf_pmu_register(&rapl_pmus_core->pmu, "power_core" , -1 );
if (ret) {
pr_warn("power-core PMU registration failed (%d)\n" , ret);
cleanup_rapl_pmus(rapl_pmus_core);
}
}
core_init_failed:
rapl_advertise();
return 0 ;
out:
pr_warn("Initialization failed (%d), disabled\n" , ret);
cleanup_rapl_pmus(rapl_pmus_pkg);
return ret;
}
module_init(rapl_pmu_init);
static void __exit intel_rapl_exit(void )
{
if (rapl_pmus_core) {
perf_pmu_unregister(&rapl_pmus_core->pmu);
cleanup_rapl_pmus(rapl_pmus_core);
}
perf_pmu_unregister(&rapl_pmus_pkg->pmu);
cleanup_rapl_pmus(rapl_pmus_pkg);
}
module_exit(intel_rapl_exit);
Messung V0.5 in Prozent C=97 H=94 G=95
¤ Dauer der Verarbeitung: 0.18 Sekunden
(vorverarbeitet am 2026-09-27)
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