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/linux-6.15/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-6.15/tools/perf/tests/shell/attr/
H A Dtest-record-group-sampling226 # inherit is enabled for group sampling
29 # sampling disabled
54 # inherit is enabled for group sampling
57 # sampling disabled
H A Dtest-record-group-sampling33 # inherit is disabled for group sampling
36 # sampling disabled
H A Dtest-record-group-sampling126 # inherit is enabled for group sampling
49 # inherit is enabled for group sampling
/linux-6.15/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-6.15/drivers/media/pci/cx88/
H A Dcx88-input.c36 u32 sampling; member
198 if (ir->sampling) { in __cx88_ir_start()
215 if (ir->sampling) { in __cx88_ir_stop()
290 ir->sampling = 0xeb04; /* address */ in cx88_ir_init()
304 ir->sampling = 1; in cx88_ir_init()
396 ir->sampling = 0xff00; /* address */ in cx88_ir_init()
402 ir->sampling = 0xff00; /* address */ in cx88_ir_init()
406 ir->sampling = 0xff00; /* address */ in cx88_ir_init()
423 ir->sampling = 1; in cx88_ir_init()
480 if (ir->sampling) { in cx88_ir_init()
[all …]
/linux-6.15/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-6.15/tools/perf/Documentation/
H A Dperf-amd-ibs.txt19 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
92 Per process(upstream v6.2 onward), uOps event, sampling period: 100000
140 System-wide profile, fetch ops event, sampling period: 100000
[all …]
H A Dperf-arm-spe.txt21 The sampling has 5 stages:
36 perturbation is also added to the sampling interval by default.
67 recording. These samples are the same as if normal sampling was done by Perf without using SPE,
98 The effect of microarchitectural sampling
101 If an implementation samples micro-operations instead of instructions, the results of sampling must
107 The coarse effect of conversions, and, if applicable, sampling of speculative operations, can be
146 jitter=1 - use jitter to avoid resonance when sampling (PMSIRR.RND)
155 +++*+++ Latency is the total latency from the point at which sampling started on that instruction, …
218 assigning PIDs to kernel samples. For userspace sampling this can be ignored.
222 Increase sampling interval (see above)
/linux-6.15/Documentation/devicetree/bindings/staging/iio/adc/
H A Dspear-adc.txt7 - sampling-frequency: Default sampling frequency
22 sampling-frequency = <5000000>;
/linux-6.15/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
H A Dconfigfs-usb-gadget-uac19 c_srate list of capture sampling rates (comma-separated)
20 p_srate list of playback sampling rates (comma-separated)
H A Dconfigfs-usb-gadget-uac29 c_srate list of capture sampling rates (comma-separated)
24 p_srate list of playback sampling rates (comma-separated)
/linux-6.15/Documentation/admin-guide/hw-vuln/
H A Dindex.rst17 special-register-buffer-data-sampling
24 reg-file-data-sampling
/linux-6.15/Documentation/sound/cards/
H A Dmaya44.rst29 - playback and capture at all 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-6.15/Documentation/devicetree/bindings/sound/
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
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 Dst,stm32-sai.yaml155 - description: x8k, SAI parent clock for sampling rates multiple of 8kHz.
156 - description: x11k, SAI parent clock for sampling rates multiple of 11.025kHz.
173 - description: x8k, SAI parent clock for sampling rates multiple of 8kHz.
174 - description: x11k, SAI parent clock for sampling rates multiple of 11.025kHz.
H A Dnuvoton,nau8824.yaml128 nuvoton,sar-sampling-time:
131 SAR sampling time.
186 nuvoton,sar-sampling-time = <1>;
/linux-6.15/arch/mips/kernel/
H A Dentry.S49 # between sampling and return
86 # sampling and return
130 # sampling and return
/linux-6.15/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-6.15/kernel/trace/
H A Dtrace_osnoise.c209 bool sampling; member
859 if (!osn_var->sampling) in trace_osnoise_callback()
898 if (!osn_var->sampling) in osnoise_trace_irq_entry()
922 if (!osn_var->sampling) in osnoise_trace_irq_exit()
1029 if (!osn_var->sampling) in trace_softirq_entry_callback()
1053 if (!osn_var->sampling) in trace_softirq_exit_callback()
1125 if (!osn_var->sampling) in thread_entry()
1149 if (!osn_var->sampling) in thread_exit()
1889 osn_var->sampling = 1; in timerlat_main()
2519 osn_var->sampling = 1; in timerlat_fd_read()
[all …]
/linux-6.15/Documentation/devicetree/bindings/mmc/
H A Dcavium-mmc.txt22 - cavium,cmd-clk-skew : number of coprocessor clocks before sampling command
23 - cavium,dat-clk-skew : number of coprocessor clocks before sampling data
/linux-6.15/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)
/linux-6.15/tools/testing/selftests/powerpc/pmu/
H A Devent.c25 int type, char *name, bool sampling) in __event_init_opts() argument
37 if (sampling) { in __event_init_opts()

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