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/Linux-v5.10/arch/s390/kernel/
Dperf_cpum_sf.c3 * Performance event support for the System z CPU-measurement Sampling Facility
27 * At least one table is required for the sampling buffer structure.
48 /* Minimum and maximum sampling buffer sizes:
50 * This number represents the maximum size of the sampling buffer taking
52 * numbers apply to the basic-sampling function only.
54 * the diagnostic-sampling function is active.
56 * Sampling buffer size Buffer characteristics
88 /* CPU-measurement sampling information block */
90 /* CPU-measurement sampling control block */
92 struct sf_buffer sfb; /* Sampling buffer */
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Dperf_event.c148 pr_info("CPU[%i] CPUM_SF: Basic-sampling: a=%i e=%i c=%i" in print_debug_sf()
152 pr_info("CPU[%i] CPUM_SF: Diagnostic-sampling: a=%i e=%i c=%i" in print_debug_sf()
193 seq_printf(m, "CPU-MF: Sampling facility: min_rate=%lu max_rate=%lu" in sl_print_sampling()
197 seq_printf(m, "CPU-MF: Sampling facility: mode=basic" in sl_print_sampling()
200 seq_printf(m, "CPU-MF: Sampling facility: mode=diagnostic" in sl_print_sampling()
/Linux-v5.10/arch/s390/include/asm/
Dcpu_mf.h31 #define CPU_MF_SF_RIBM_NOTAV 0x1 /* Sampling unavailable */
57 /* QUERY SAMPLING INFORMATION block */
60 unsigned int as:1; /* 14: basic-sampling authorization */
61 unsigned int ad:1; /* 15: diag-sampling authorization */
63 unsigned int es:1; /* 22: basic-sampling enable control */
64 unsigned int ed:1; /* 23: diag-sampling enable control */
66 unsigned int cs:1; /* 30: basic-sampling activation control */
67 unsigned int cd:1; /* 31: diag-sampling activation control */
68 unsigned int bsdes:16; /* 4-5: size of basic sampling entry */
69 unsigned int dsdes:16; /* 6-7: size of diagnostic sampling entry */
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Dperf_event.h54 /* Perf PMU definitions for the sampling facility */
56 #define PERF_EVENT_CPUM_SF 0xB0000UL /* Event: Basic-sampling */
57 #define PERF_EVENT_CPUM_SF_DIAG 0xBD000UL /* Event: Combined-sampling */
59 #define PERF_CPUM_SF_BASIC_MODE 0x0001 /* Basic-sampling flag */
60 #define PERF_CPUM_SF_DIAG_MODE 0x0002 /* Diagnostic-sampling flag */
64 #define PERF_CPUM_SF_FREQ_MODE 0x0008 /* Sampling with frequency */
/Linux-v5.10/drivers/iio/pressure/
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
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/Linux-v5.10/tools/lib/perf/Documentation/
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-v5.10/drivers/tty/serial/
Dsh-sci.h27 HSSRR, /* Sampling Rate Register */
51 #define SCSMR_SRC_MASK 0x0700 /* Sampling Control */
52 #define SCSMR_SRC_16 0x0000 /* Sampling rate 1/16 */
53 #define SCSMR_SRC_5 0x0100 /* Sampling rate 1/5 */
54 #define SCSMR_SRC_7 0x0200 /* Sampling rate 1/7 */
55 #define SCSMR_SRC_11 0x0300 /* Sampling rate 1/11 */
56 #define SCSMR_SRC_13 0x0400 /* Sampling rate 1/13 */
57 #define SCSMR_SRC_17 0x0500 /* Sampling rate 1/17 */
58 #define SCSMR_SRC_19 0x0600 /* Sampling rate 1/19 */
59 #define SCSMR_SRC_27 0x0700 /* Sampling rate 1/27 */
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/Linux-v5.10/Documentation/sound/cards/
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-v5.10/include/drm/
Ddrm_fourcc.h190 * YUV format with 4:1:0 sub-sampling
195 * sub-sampling.
205 * YUV format with 4:1:1 sub-sampling
210 * sub-sampling.
220 * YUV format with 4:2:0 sub-sampling
225 * sub-sampling.
235 * YUV format with 4:2:2 sub-sampling
240 * sub-sampling.
250 * YUV format with 4:4:4 sub-sampling
255 * sub-sampling.
/Linux-v5.10/tools/perf/arch/s390/util/
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()
108 /* sampling in diagnose mode. alloc aux buffer */ in auxtrace_record__init()
/Linux-v5.10/drivers/gpu/drm/i915/
Di915_pmu.h61 * @timer: Timer for internal i915 PMU sampling.
89 * and they are used to control sampling on/off when multiple clients
94 * @timer_enabled: Should the internal sampling timer be running.
98 * @sample: Current and previous (raw) counters for sampling events.
100 * These counters are updated from the i915 PMU sampling timer.
/Linux-v5.10/net/psample/
DKconfig3 # psample packet sampling configuration
8 tristate "Packet-sampling netlink channel"
11 Say Y here to add support for packet-sampling netlink channel
/Linux-v5.10/Documentation/devicetree/bindings/staging/iio/adc/
Dspear-adc.txt7 - sampling-frequency: Default sampling frequency
22 sampling-frequency = <5000000>;
/Linux-v5.10/drivers/media/pci/cx88/
Dcx88-input.c36 u32 sampling; member
199 if (ir->sampling) { in __cx88_ir_start()
216 if (ir->sampling) { in __cx88_ir_stop()
291 ir->sampling = 0xeb04; /* address */ in cx88_ir_init()
305 ir->sampling = 1; in cx88_ir_init()
397 ir->sampling = 0xff00; /* address */ in cx88_ir_init()
403 ir->sampling = 0xff00; /* address */ in cx88_ir_init()
407 ir->sampling = 0xff00; /* address */ in cx88_ir_init()
424 ir->sampling = 1; in cx88_ir_init()
434 ir->sampling = 0xff00; /* address */ in cx88_ir_init()
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/Linux-v5.10/Documentation/devicetree/bindings/spi/
Dspi-samsung.txt61 - samsung,spi-feedback-delay: The sampling phase shift to be applied on the
66 - 1: 90 degree phase shift sampling.
67 - 2: 180 degree phase shift sampling.
68 - 3: 270 degree phase shift sampling.
/Linux-v5.10/drivers/mmc/host/
Drenesas_sdhi.h17 u32 tap; /* sampling clock position for SDR104/HS400 (8 TAP) */
18 u32 tap_hs400_4tap; /* sampling clock position for HS400 (4 TAP) */
69 /* Sampling data comparison: 1 for match, 0 for mismatch */
/Linux-v5.10/arch/ia64/include/uapi/asm/
Dperfmon.h53 #define PFM_REGFL_RANDOM 0x2 /* randomize sampling interval */
67 typedef unsigned char pfm_uuid_t[16]; /* custom sampling buffer identifier type */
78 void *ctx_smpl_vaddr; /* return arg: virtual address of sampling buffer, is used */
102 unsigned long reg_smpl_eventid; /* opaque sampling event identifier */
161 * Define the version numbers for both perfmon as a whole and the sampling buffer format.
/Linux-v5.10/kernel/trace/
Dtrace_hwlat.c27 * sampling the built-in CPU timer, looking for discontiguous readings.
57 /* sampling thread*/
96 u64 sample_window; /* total sampling window (on+off) */
97 u64 sample_width; /* active sampling portion of window */
321 * kthread_fn - The CPU time sampling/hardware latency detection kernel thread
360 * start_kthread - Kick off the hardware latency sampling/detector kthread
382 pr_err(BANNER "could not start sampling thread\n"); in start_kthread()
399 * This kicks the running hardware latency sampling/detector kernel thread and
400 * tells it to stop sampling now. Use this on unload and at system shutdown.
491 * actual sampling occurs. Can be used to write a new total window size. It
/Linux-v5.10/Documentation/x86/
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-v5.10/Documentation/devicetree/bindings/sound/
Dnau8824.txt53 - nuvoton,sar-sampling-time: SAR sampling time
85 nuvoton,sar-sampling-time = <1>;
/Linux-v5.10/tools/power/cpupower/bench/
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)
/Linux-v5.10/tools/perf/util/
Ds390-cpumsf-kernel.h3 * Auxtrace support for s390 CPU measurement sampling facility
41 struct hws_basic_entry basic; /* Basic-sampling data entry */
42 struct hws_diag_entry diag; /* Diagnostic-sampling data entry */
/Linux-v5.10/Documentation/admin-guide/hw-vuln/
Dmds.rst1 MDS - Microarchitectural Data Sampling
4 Microarchitectural Data Sampling is a hardware vulnerability which allows
36 CVE-2018-12126 MSBDS Microarchitectural Store Buffer Data Sampling
37 CVE-2018-12130 MFBDS Microarchitectural Fill Buffer Data Sampling
38 CVE-2018-12127 MLPDS Microarchitectural Load Port Data Sampling
39 CVE-2019-11091 MDSUM Microarchitectural Data Sampling Uncacheable Memory
73 consequence the attacks are purely sampling based, but as demonstrated with
/Linux-v5.10/tools/perf/Documentation/
Dperf-record.txt55 - 'period': Set event sampling period
56 - 'freq': Set event sampling frequency
69 - 'aux-sample-size': Set sample size for AUX area sampling. If the
71 AUX area sampling for the event.
269 doesn't work with branch stack sampling at the same time.
358 Enable taken branch stack sampling. Any type of taken branch may be sampled.
363 Enable taken branch stack sampling. Each sample captures a series of consecutive
381 - save_type: save branch type during sampling in case binary is not available later
387 levels are subject to permissions. When sampling on multiple events, branch stack sampling
388 is enabled for all the sampling events. The sampled branch type is the same for all events.
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/Linux-v5.10/Documentation/ABI/testing/
Dconfigfs-usb-gadget-uac29 c_srate capture sampling rate
12 p_srate playback sampling rate

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