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/linux/drivers/iio/pressure/
H A Dzpa2326.c18 * ZPA2326 hardware supports 2 sampling mode: one shot and continuous.
20 * A complete one shot sampling cycle gets device out of low power mode,
22 * back to low power mode. It is meant for on demand sampling with optimal power
23 * saving at the cost of lower sampling rate and higher software overhead.
35 * - setup hardware sampling period,
38 * - when no longer needed, stop sampling process by putting device into
44 * Note that hardware sampling frequency is taken into account only when
45 * internal hardware trigger is attached as the highest sampling rate seems to
50 * differential pressure sampling ;
78 * struct zpa2326_frequency - Hardware sampling frequency descriptor
[all …]
/linux/tools/lib/perf/Documentation/
H A Dlibperf-sampling.txt1 libperf-sampling(7)
6 libperf-sampling - sampling interface
11 The sampling interface provides API to measure and get count for specific perf events.
13 The following test tries to explain count on `sampling.c` example.
15 It is by no means complete guide to sampling, but shows libperf basic API for sampling.
17 The `sampling.c` comes with libperf package and can be compiled and run like:
21 $ gcc -o sampling sampling.c -lperf
22 $ sudo ./sampling
36 The `sampling.c` example profiles/samples all CPUs with hardware cycles, in a
158 From this moment the cycles event is sampling.
/linux/tools/perf/Documentation/
H A Dperf-amd-ibs.txt6 perf-amd-ibs - Support for AMD Instruction-Based Sampling (IBS) with perf tool
17 Instruction-Based Sampling (IBS) provides precise Instruction Pointer (IP)
19 Op and IBS Fetch. IBS Op sampling provides information about instruction
22 behavior etc. IBS Fetch sampling provides information about instruction fetch
64 System-wide profile, cycles event, sampling period: 100000
68 Per-cpu profile (cpu10), cycles event, sampling period: 100000
72 Per-cpu profile (cpu10), cycles event, sampling freq: 1000
76 System-wide profile, uOps event, sampling period: 100000
84 System-wide profile, uOps event, sampling period: 100000, L3MissOnly (Zen4 onward)
88 Per process(upstream v6.2 onward), uOps event, sampling period: 100000
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/linux/drivers/tty/serial/
H A Dsh-sci.h27 HSSRR, /* Sampling Rate Register */
52 #define SCSMR_SRC_MASK 0x0700 /* Sampling Control */
53 #define SCSMR_SRC_16 0x0000 /* Sampling rate 1/16 */
54 #define SCSMR_SRC_5 0x0100 /* Sampling rate 1/5 */
55 #define SCSMR_SRC_7 0x0200 /* Sampling rate 1/7 */
56 #define SCSMR_SRC_11 0x0300 /* Sampling rate 1/11 */
57 #define SCSMR_SRC_13 0x0400 /* Sampling rate 1/13 */
58 #define SCSMR_SRC_17 0x0500 /* Sampling rate 1/17 */
59 #define SCSMR_SRC_19 0x0600 /* Sampling rate 1/19 */
60 #define SCSMR_SRC_27 0x0700 /* Sampling rate 1/27 */
[all …]
/linux/Documentation/sound/cards/
H A Dmaya44.rst29 - playback and capture at all sampling rates
63 * pci/ice1724/ice1724.h.patch - PROPOSED patch to ice1724.h (see SAMPLING RATES)
92 SAMPLING RATES
95 The Maya44 card (or more exactly, the Wolfson WM8776 codecs) allow a maximum sampling rate of 192 k…
97 As the ICE1724 chip only allows one global sampling rate, this is handled as follows:
99 * setting the sampling rate on any open PCM device on the maya44 card will always set the *global* …
106 …ditional code for limiting the sampling rate when setting on a capture pcm device. However because…
/linux/Documentation/ABI/testing/
H A Ddebugfs-intel-iommu162 to enable sampling.
166 * 0 - disable sampling all latency data
168 * 1 - enable sampling IOTLB invalidation latency data
170 * 2 - enable sampling devTLB invalidation latency data
172 * 3 - enable sampling intr entry cache invalidation latency data
175 a snapshot of sampling result of all enabled monitors.
181 1) Disable sampling all latency data:
185 2) Enable sampling IOTLB invalidation latency data
207 3) Enable sampling devTLB invalidation latency data
/linux/tools/thermal/thermometer/
H A Dthermometer.814 specified sampling period. It is optimized to reduce as much as
18 This low overhead also allows a high rate sampling for the temperature
23 the thermal zone names and the desired sampling period. A thermal zone
26 The sampling of the different thermal zones will be written into
47 sampling files
/linux/tools/testing/selftests/powerpc/pmu/event_code_tests/
H A Dreserved_bits_mmcra_sample_elig_mode_test.c12 * Register A (MMCRA) Random Sampling Mode (SM) value.
15 * for sampling mode field. Test that having these reserved
17 * Input event code uses these sampling bits along with
32 * MMCRA Random Sampling Mode (SM) values: 0x5 in reserved_bits_mmcra_sample_elig_mode()
58 * MMCRA Random Sampling Mode (SM) value 0x10 in reserved_bits_mmcra_sample_elig_mode()
H A Dgroup_constraint_mmcra_sample_test.c28 * Use event with load only sampling mode as in group_constraint_mmcra_sample()
29 * group leader. Use event with store only sampling in group_constraint_mmcra_sample()
37 /* Expected to fail as sibling event doesn't use same sampling bits as leader */ in group_constraint_mmcra_sample()
42 /* Expected to pass as sibling event use same sampling bits as leader */ in group_constraint_mmcra_sample()
/linux/tools/testing/selftests/drivers/net/netdevsim/
H A Dpsample.sh42 check_err $? "Failed to enable sampling when should not"
45 check_fail $? "Sampling enablement succeeded when should fail"
53 check_err $? "Failed to disable sampling when should not"
56 check_fail $? "Sampling disablement succeeded when should fail"
82 check_fail $? "Group number changed while sampling is active"
88 check_err $? "Group number did not change after restarting sampling"
/linux/Documentation/devicetree/bindings/spi/
H A Dsamsung,spi-peripheral-props.yaml23 The sampling phase shift to be applied on the miso line (to account
26 - 1: 90 degree phase shift sampling.
27 - 2: 180 degree phase shift sampling.
28 - 3: 270 degree phase shift sampling.
/linux/drivers/gpu/drm/i915/
H A Di915_pmu.h30 * Slots used from the sampling timer (non-engine events) with some extras for
87 * @timer: Timer for internal i915 PMU sampling.
114 * and they are used to control sampling on/off when multiple clients
119 * @timer_enabled: Should the internal sampling timer be running.
123 * @sample: Current and previous (raw) counters for sampling events.
125 * These counters are updated from the i915 PMU sampling timer.
/linux/tools/perf/arch/s390/util/
H A Dauxtrace.c14 #define PERF_EVENT_CPUM_SF 0xB0000 /* Event: Basic-sampling */
15 #define PERF_EVENT_CPUM_SF_DIAG 0xBD000 /* Event: Combined-sampling */
59 * DEFAULT_AUX_PAGES is an proper size when sampling frequency in cpumsf_recording_options()
61 * of sampling data. The size used for AUX buffer will scale in cpumsf_recording_options()
109 /* sampling in diagnose mode. alloc aux buffer */ in auxtrace_record__init()
/linux/tools/testing/selftests/powerpc/pmu/sampling_tests/
H A Dmmcra_thresh_cmp_test.c16 * Sampling criteria is Load only sampling
23 /* A perf sampling test to test mmcra fields */
36 /* Init the event for the sampling test */ in mmcra_thresh_cmp()
H A Dmmcra_thresh_marked_sample_test.c16 * Sampling criteria is Load only sampling
22 /* A perf sampling test to test mmcra fields */
32 /* Init the event for the sampling test */ in mmcra_thresh_marked_sample()
H A Dintr_regs_no_crash_wo_pmu_test.c14 * A perf sampling test for making sure
15 * sampling with -intr-regs doesn't crash
33 * Init the event for the sampling test. in intr_regs_no_crash_wo_pmu_test()
H A Dbhrb_no_crash_wo_pmu_test.c14 * A perf sampling test for making sure
20 * A fix for bhrb sampling crash was added in kernel
34 * Init the event for the sampling test. in bhrb_no_crash_wo_pmu_test()
/linux/net/psample/
H A DKconfig3 # psample packet sampling configuration
7 tristate "Packet-sampling netlink channel"
10 Say Y here to add support for packet-sampling netlink channel
/linux/Documentation/devicetree/bindings/staging/iio/adc/
H A Dspear-adc.txt7 - sampling-frequency: Default sampling frequency
22 sampling-frequency = <5000000>;
/linux/kernel/trace/
H A Dtrace_hwlat.c27 * sampling the built-in CPU timer, looking for discontiguous readings.
109 u64 sample_window; /* total sampling window (on+off) */
110 u64 sample_width; /* active sampling portion of window */
349 * kthread_fn - The CPU time sampling/hardware latency detection kernel thread
389 * stop_stop_kthread - Inform the hardware latency sampling/detector kthread to stop
391 * This kicks the running hardware latency sampling/detector kernel thread and
392 * tells it to stop sampling now. Use this on unload and at system shutdown.
414 * start_single_kthread - Kick off the hardware latency sampling/detector kthread
432 pr_err(BANNER "could not start sampling thread\n"); in start_single_kthread()
471 * stop_per_cpu_kthreads - Inform the hardware latency sampling/detector kthread to stop
[all …]
/linux/Documentation/devicetree/bindings/sound/
H A Dnvidia,tegra210-sfc.yaml10 The Sampling Frequency Converter (SFC) converts the sampling frequency
11 of the input signal from one frequency to another. It supports sampling
H A Dmicrochip,sama7g5-pdmc.yaml51 Position of PDM microphones on the DS line and the sampling edge (rising
53 line and the sampling edge. The first microphone is mapped to channel 0,
60 - description: value for sampling edge
/linux/Documentation/arch/x86/
H A Dmds.rst1 Microarchitectural Data Sampling (MDS) mitigation
9 Microarchitectural Data Sampling (MDS) is a family of side channel attacks
12 - Microarchitectural Store Buffer Data Sampling (MSBDS) (CVE-2018-12126)
13 - Microarchitectural Fill Buffer Data Sampling (MFBDS) (CVE-2018-12130)
14 - Microarchitectural Load Port Data Sampling (MLPDS) (CVE-2018-12127)
15 - Microarchitectural Data Sampling Uncacheable Memory (MDSUM) (CVE-2019-11091)
/linux/Documentation/devicetree/bindings/iio/adc/
H A Dmicrochip,pac1934.yaml40 A GPIO used to trigger a change is sampling rate (lowering the chip power
42 sampling rate is forced to eight samples/second. When it is forced low,
43 the sampling rate is 1024 samples/second unless a different sample rate
/linux/tools/power/cpupower/bench/
H A DREADME-BENCH74 sampling rate you get:
79 In round 2, if the ondemand sampling times exactly match the load/sleep
91 |-----|-----|-----|-----|-----|-----|-----|---- ondemand sampling (1)
93 |-----|-----|-----|-----|-----|-----|-----|-- ondemand sampling (2)

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