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/openbmc/linux/Documentation/core-api/
H A Dthis_cpu_ops.rst8 this_cpu operations are a way of optimizing access to per cpu
11 the cpu permanently stored the beginning of the per cpu area for a
14 this_cpu operations add a per cpu variable offset to the processor
15 specific per cpu base and encode that operation in the instruction
16 operating on the per cpu variable.
24 Read-modify-write operations are of particular interest. Frequently
32 synchronization is not necessary since we are dealing with per cpu
37 Please note that accesses by remote processors to a per cpu area are
65 ------------------------------------
68 per cpu area. It is then possible to simply use the segment override
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/openbmc/linux/tools/perf/pmu-events/arch/x86/broadwellde/
H A Dbdwde-metrics.json3 "BriefDescription": "C2 residency percent per package",
4 "MetricExpr": "cstate_pkg@c2\\-residency@ / TSC",
10 "BriefDescription": "C3 residency percent per core",
11 "MetricExpr": "cstate_core@c3\\-residency@ / TSC",
17 "BriefDescription": "C3 residency percent per package",
18 "MetricExpr": "cstate_pkg@c3\\-residency@ / TSC",
24 "BriefDescription": "C6 residency percent per core",
25 "MetricExpr": "cstate_core@c6\\-residency@ / TSC",
31 "BriefDescription": "C6 residency percent per package",
32 "MetricExpr": "cstate_pkg@c6\\-residency@ / TSC",
[all …]
/openbmc/linux/tools/perf/pmu-events/arch/x86/broadwell/
H A Dbdw-metrics.json3 "BriefDescription": "C2 residency percent per package",
4 "MetricExpr": "cstate_pkg@c2\\-residency@ / TSC",
10 "BriefDescription": "C3 residency percent per core",
11 "MetricExpr": "cstate_core@c3\\-residency@ / TSC",
17 "BriefDescription": "C3 residency percent per package",
18 "MetricExpr": "cstate_pkg@c3\\-residency@ / TSC",
24 "BriefDescription": "C6 residency percent per core",
25 "MetricExpr": "cstate_core@c6\\-residency@ / TSC",
31 "BriefDescription": "C6 residency percent per package",
32 "MetricExpr": "cstate_pkg@c6\\-residency@ / TSC",
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/openbmc/linux/tools/perf/pmu-events/arch/x86/skylake/
H A Dskl-metrics.json3 "BriefDescription": "C2 residency percent per package",
4 "MetricExpr": "cstate_pkg@c2\\-residency@ / TSC",
10 "BriefDescription": "C3 residency percent per core",
11 "MetricExpr": "cstate_core@c3\\-residency@ / TSC",
17 "BriefDescription": "C3 residency percent per package",
18 "MetricExpr": "cstate_pkg@c3\\-residency@ / TSC",
24 "BriefDescription": "C6 residency percent per core",
25 "MetricExpr": "cstate_core@c6\\-residency@ / TSC",
31 "BriefDescription": "C6 residency percent per package",
32 "MetricExpr": "cstate_pkg@c6\\-residency@ / TSC",
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/openbmc/linux/arch/ia64/mm/
H A Ddiscontig.c1 // SPDX-License-Identifier: GPL-2.0
7 * Copyright (c) 2002 Kimio Suganuma <k-suganuma@da.jp.nec.com>
34 * Track per-node information needed to setup the boot memory allocator, the
35 * per-node areas, and the real VM.
51 * To prevent cache aliasing effects, align per-node structures so that they
56 ((((addr) + 1024*1024-1) & ~(1024*1024-1)) + \
57 (((node)*PERCPU_PAGE_SIZE) & (MAX_NODE_ALIGN_OFFSET - 1)))
60 * build_node_maps - callback to setup mem_data structs for each node
68 * if necessary. Any non-existent pages will simply be part of the virtual
91 * early_nr_cpus_node - return number of cpus on a given node
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/openbmc/linux/tools/power/x86/x86_energy_perf_policy/
H A Dx86_energy_perf_policy.81 .\" This page Copyright (C) 2010 - 2015 Len Brown <len.brown@intel.com>
5 x86_energy_perf_policy \- Manage Energy vs. Performance Policy via x86 Model Specific Registers
10 .RB "scope: \-\-cpu\ cpu-list | \-\-pkg\ pkg-list"
12 .RB "cpu-list, pkg-list: # | #,# | #-# | all"
14 .RB "field: \-\-all | \-\-epb | \-\-hwp-epp | \-\-hwp-min | \-\-hwp-max | \-\-hwp-desired"
16 .RB "other: (\-\-force | \-\-hwp-enable | \-\-turbo-enable) value)"
18 .RB "value: # | default | performance | balance-performance | balance-power | power"
21 displays and updates energy-performance policy settings specific to
23 updates, no matter if the Linux cpufreq sub-system is enabled or not.
27 such as how aggressively the hardware enters and exits CPU idle states (C-states)
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/openbmc/linux/tools/perf/pmu-events/arch/x86/rocketlake/
H A Drkl-metrics.json3 "BriefDescription": "C10 residency percent per package",
4 "MetricExpr": "cstate_pkg@c10\\-residency@ / TSC",
10 "BriefDescription": "C2 residency percent per package",
11 "MetricExpr": "cstate_pkg@c2\\-residency@ / TSC",
17 "BriefDescription": "C3 residency percent per package",
18 "MetricExpr": "cstate_pkg@c3\\-residency@ / TSC",
24 "BriefDescription": "C6 residency percent per core",
25 "MetricExpr": "cstate_core@c6\\-residency@ / TSC",
31 "BriefDescription": "C6 residency percent per package",
32 "MetricExpr": "cstate_pkg@c6\\-residency@ / TSC",
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/openbmc/linux/tools/perf/pmu-events/arch/x86/tigerlake/
H A Dtgl-metrics.json3 "BriefDescription": "C10 residency percent per package",
4 "MetricExpr": "cstate_pkg@c10\\-residency@ / TSC",
10 "BriefDescription": "C2 residency percent per package",
11 "MetricExpr": "cstate_pkg@c2\\-residency@ / TSC",
17 "BriefDescription": "C3 residency percent per package",
18 "MetricExpr": "cstate_pkg@c3\\-residency@ / TSC",
24 "BriefDescription": "C6 residency percent per core",
25 "MetricExpr": "cstate_core@c6\\-residency@ / TSC",
31 "BriefDescription": "C6 residency percent per package",
32 "MetricExpr": "cstate_pkg@c6\\-residency@ / TSC",
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/openbmc/linux/tools/perf/pmu-events/arch/x86/icelake/
H A Dicl-metrics.json3 "BriefDescription": "C10 residency percent per package",
4 "MetricExpr": "cstate_pkg@c10\\-residency@ / TSC",
10 "BriefDescription": "C2 residency percent per package",
11 "MetricExpr": "cstate_pkg@c2\\-residency@ / TSC",
17 "BriefDescription": "C3 residency percent per package",
18 "MetricExpr": "cstate_pkg@c3\\-residency@ / TSC",
24 "BriefDescription": "C6 residency percent per core",
25 "MetricExpr": "cstate_core@c6\\-residency@ / TSC",
31 "BriefDescription": "C6 residency percent per package",
32 "MetricExpr": "cstate_pkg@c6\\-residency@ / TSC",
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/openbmc/linux/tools/perf/pmu-events/arch/x86/haswell/
H A Dhsw-metrics.json3 "BriefDescription": "C2 residency percent per package",
4 "MetricExpr": "cstate_pkg@c2\\-residency@ / TSC",
10 "BriefDescription": "C3 residency percent per core",
11 "MetricExpr": "cstate_core@c3\\-residency@ / TSC",
17 "BriefDescription": "C3 residency percent per package",
18 "MetricExpr": "cstate_pkg@c3\\-residency@ / TSC",
24 "BriefDescription": "C6 residency percent per core",
25 "MetricExpr": "cstate_core@c6\\-residency@ / TSC",
31 "BriefDescription": "C6 residency percent per package",
32 "MetricExpr": "cstate_pkg@c6\\-residency@ / TSC",
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/openbmc/linux/Documentation/virt/
H A Dguest-halt-polling.rst15 2) The VM-exit cost can be avoided.
25 ("per-cpu guest_halt_poll_ns"), which is adjusted by the algorithm
42 Division factor used to shrink per-cpu guest_halt_poll_ns when
49 Multiplication factor used to grow per-cpu guest_halt_poll_ns
50 when event occurs after per-cpu guest_halt_poll_ns
57 The per-cpu guest_halt_poll_ns eventually reaches zero
59 per-cpu guest_halt_poll_ns when growing. This can
70 to avoid it (per-cpu guest_halt_poll_ns will remain
82 - Care should be taken when setting the guest_halt_poll_ns parameter as a
83 large value has the potential to drive the cpu usage to 100% on a machine
/openbmc/linux/tools/perf/tests/shell/lib/
H A Dstat_output.sh2 # SPDX-License-Identifier: GPL-2.0
7 [ "$(id -u)" != 0 ] && [ "$(cat /proc/sys/kernel/perf_event_paranoid)" -gt $1 ]
13 echo -n "Checking $1 output: no args "
15 commachecker --no-args
21 echo -n "Checking $1 output: system wide "
27 perf stat -a $2 true
28 commachecker --system-wide
34 echo -n "Checking $1 output: system wide no aggregation "
40 perf stat -A -a --no-merge $2 true
41 commachecker --system-wide-no-aggr
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/openbmc/linux/Documentation/trace/
H A Devents-kmem.rst8 - Slab allocation of small objects of unknown type (kmalloc)
9 - Slab allocation of small objects of known type
10 - Page allocation
11 - Per-CPU Allocator Activity
12 - External Fragmentation
40 These events are similar in usage to the kmalloc-related events except that
50 mm_page_alloc_zone_locked page=%p pfn=%lu order=%u migratetype=%d cpu=%d percpu_refill=%d
56 the per-CPU allocator (high performance) or the buddy allocator.
60 amounts of activity imply high activity on the zone->lock. Taking this lock
72 contention on the lruvec->lru_lock.
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/openbmc/linux/include/linux/
H A Dlocal_lock.h1 /* SPDX-License-Identifier: GPL-2.0 */
8 * local_lock_init - Runtime initialize a lock instance
13 * local_lock - Acquire a per CPU local lock
19 * local_lock_irq - Acquire a per CPU local lock and disable interrupts
25 * local_lock_irqsave - Acquire a per CPU local lock, save and disable
34 * local_unlock - Release a per CPU local lock
40 * local_unlock_irq - Release a per CPU local lock and enable interrupts
46 * local_unlock_irqrestore - Release a per CPU local lock and restore
/openbmc/linux/tools/perf/pmu-events/arch/x86/ivytown/
H A Divt-metrics.json3 "BriefDescription": "C2 residency percent per package",
4 "MetricExpr": "cstate_pkg@c2\\-residency@ / TSC",
10 "BriefDescription": "C3 residency percent per core",
11 "MetricExpr": "cstate_core@c3\\-residency@ / TSC",
17 "BriefDescription": "C3 residency percent per package",
18 "MetricExpr": "cstate_pkg@c3\\-residency@ / TSC",
24 "BriefDescription": "C6 residency percent per core",
25 "MetricExpr": "cstate_core@c6\\-residency@ / TSC",
31 "BriefDescription": "C6 residency percent per package",
32 "MetricExpr": "cstate_pkg@c6\\-residency@ / TSC",
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/openbmc/linux/tools/perf/pmu-events/arch/x86/ivybridge/
H A Divb-metrics.json3 "BriefDescription": "C2 residency percent per package",
4 "MetricExpr": "cstate_pkg@c2\\-residency@ / TSC",
10 "BriefDescription": "C3 residency percent per core",
11 "MetricExpr": "cstate_core@c3\\-residency@ / TSC",
17 "BriefDescription": "C3 residency percent per package",
18 "MetricExpr": "cstate_pkg@c3\\-residency@ / TSC",
24 "BriefDescription": "C6 residency percent per core",
25 "MetricExpr": "cstate_core@c6\\-residency@ / TSC",
31 "BriefDescription": "C6 residency percent per package",
32 "MetricExpr": "cstate_pkg@c6\\-residency@ / TSC",
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/openbmc/linux/tools/perf/pmu-events/arch/x86/broadwellx/
H A Dbdx-metrics.json3 "BriefDescription": "C2 residency percent per package",
4 "MetricExpr": "cstate_pkg@c2\\-residency@ / TSC",
10 "BriefDescription": "C3 residency percent per core",
11 "MetricExpr": "cstate_core@c3\\-residency@ / TSC",
17 "BriefDescription": "C3 residency percent per package",
18 "MetricExpr": "cstate_pkg@c3\\-residency@ / TSC",
24 "BriefDescription": "C6 residency percent per core",
25 "MetricExpr": "cstate_core@c6\\-residency@ / TSC",
31 "BriefDescription": "C6 residency percent per package",
32 "MetricExpr": "cstate_pkg@c6\\-residency@ / TSC",
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/openbmc/linux/tools/perf/pmu-events/arch/x86/sapphirerapids/
H A Dspr-metrics.json3 "BriefDescription": "C1 residency percent per core",
4 "MetricExpr": "cstate_core@c1\\-residency@ / TSC",
10 "BriefDescription": "C2 residency percent per package",
11 "MetricExpr": "cstate_pkg@c2\\-residency@ / TSC",
17 "BriefDescription": "C6 residency percent per core",
18 "MetricExpr": "cstate_core@c6\\-residency@ / TSC",
24 "BriefDescription": "C6 residency percent per package",
25 "MetricExpr": "cstate_pkg@c6\\-residency@ / TSC",
31 "BriefDescription": "Uncore frequency per die [GHZ]",
37 …"BriefDescription": "Cycles per instruction retired; indicating how much time each executed instru…
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/openbmc/linux/tools/perf/pmu-events/arch/x86/icelakex/
H A Dicx-metrics.json3 "BriefDescription": "C1 residency percent per core",
4 "MetricExpr": "cstate_core@c1\\-residency@ / TSC",
10 "BriefDescription": "C2 residency percent per package",
11 "MetricExpr": "cstate_pkg@c2\\-residency@ / TSC",
17 "BriefDescription": "C6 residency percent per core",
18 "MetricExpr": "cstate_core@c6\\-residency@ / TSC",
24 "BriefDescription": "C6 residency percent per package",
25 "MetricExpr": "cstate_pkg@c6\\-residency@ / TSC",
31 "BriefDescription": "Uncore frequency per die [GHZ]",
37 …"BriefDescription": "Cycles per instruction retired; indicating how much time each executed instru…
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/openbmc/linux/tools/perf/pmu-events/arch/x86/cascadelakex/
H A Dclx-metrics.json3 "BriefDescription": "C2 residency percent per package",
4 "MetricExpr": "cstate_pkg@c2\\-residency@ / TSC",
10 "BriefDescription": "C3 residency percent per core",
11 "MetricExpr": "cstate_core@c3\\-residency@ / TSC",
17 "BriefDescription": "C3 residency percent per package",
18 "MetricExpr": "cstate_pkg@c3\\-residency@ / TSC",
24 "BriefDescription": "C6 residency percent per core",
25 "MetricExpr": "cstate_core@c6\\-residency@ / TSC",
31 "BriefDescription": "C6 residency percent per package",
32 "MetricExpr": "cstate_pkg@c6\\-residency@ / TSC",
[all …]
/openbmc/linux/tools/perf/pmu-events/arch/x86/skylakex/
H A Dskx-metrics.json3 "BriefDescription": "C2 residency percent per package",
4 "MetricExpr": "cstate_pkg@c2\\-residency@ / TSC",
10 "BriefDescription": "C3 residency percent per core",
11 "MetricExpr": "cstate_core@c3\\-residency@ / TSC",
17 "BriefDescription": "C3 residency percent per package",
18 "MetricExpr": "cstate_pkg@c3\\-residency@ / TSC",
24 "BriefDescription": "C6 residency percent per core",
25 "MetricExpr": "cstate_core@c6\\-residency@ / TSC",
31 "BriefDescription": "C6 residency percent per package",
32 "MetricExpr": "cstate_pkg@c6\\-residency@ / TSC",
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/openbmc/linux/drivers/irqchip/
H A Dirq-armada-370-xp.c7 * Gregory CLEMENT <gregory.clement@free-electrons.com>
8 * Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
23 #include <linux/cpu.h>
40 * To CPU 0 To CPU 1
44 * +---------------+ +---------------+
46 * | per-CPU | | per-CPU |
50 * +---------------+ +---------------+
55 * +-------------------+
60 * +-------------------+
71 * The "per-CPU mask/unmask" is modified using the
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/openbmc/linux/Documentation/arch/x86/
H A Dtopology.rst1 .. SPDX-License-Identifier: GPL-2.0
11 The architecture-agnostic topology definitions are in
12 Documentation/admin-guide/cputopology.rst. This file holds x86-specific
17 Needless to say, code should use the generic functions - this file is *only*
35 - packages
36 - cores
37 - threads
48 Package-related topology information in the kernel:
50 - cpuinfo_x86.x86_max_cores:
54 - cpuinfo_x86.x86_max_dies:
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/openbmc/linux/kernel/events/
H A Dhw_breakpoint.c1 // SPDX-License-Identifier: GPL-2.0+
15 * HW_breakpoint: a unified kernel/user-space hardware breakpoint facility,
16 * using the CPU's debug registers.
17 * This file contains the arch-independent routines.
24 #include <linux/cpu.h>
32 #include <linux/percpu-rwsem.h>
51 * Per-CPU constraints data.
54 /* Number of pinned CPU breakpoints in a CPU. */
56 /* Histogram of pinned task breakpoints in a CPU. */
62 static struct bp_cpuinfo *get_bp_info(int cpu, enum bp_type_idx type) in get_bp_info() argument
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/openbmc/linux/tools/perf/pmu-events/arch/x86/jaketown/
H A Djkt-metrics.json3 "BriefDescription": "C2 residency percent per package",
4 "MetricExpr": "cstate_pkg@c2\\-residency@ / TSC",
10 "BriefDescription": "C3 residency percent per core",
11 "MetricExpr": "cstate_core@c3\\-residency@ / TSC",
17 "BriefDescription": "C3 residency percent per package",
18 "MetricExpr": "cstate_pkg@c3\\-residency@ / TSC",
24 "BriefDescription": "C6 residency percent per core",
25 "MetricExpr": "cstate_core@c6\\-residency@ / TSC",
31 "BriefDescription": "C6 residency percent per package",
32 "MetricExpr": "cstate_pkg@c6\\-residency@ / TSC",
[all …]

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