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/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/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/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()
433 ir->sampling = 0xff00; /* address */ in cx88_ir_init()
[all …]
/linux/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 System-wide profile, cycles event, sampling period: 100000, LdLat filtering (Zen5
97 Per process(upstream v6.2 onward), uOps event, sampling period: 100000
101 Per process(upstream v6.2 onward), uOps 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)
154 +++*+++ Latency is the total latency from the point at which sampling started on that instruction, …
290 assigning PIDs to kernel samples. For userspace sampling this can be ignored.
294 Increase sampling interval (see above)
/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/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/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/Documentation/admin-guide/hw-vuln/
H A Dindex.rst18 special-register-buffer-data-sampling
25 reg-file-data-sampling
/linux/kernel/trace/
H A Dtrace_osnoise.c210 bool sampling; member
860 if (!osn_var->sampling) in trace_osnoise_callback()
899 if (!osn_var->sampling) in osnoise_trace_irq_entry()
923 if (!osn_var->sampling) in osnoise_trace_irq_exit()
1030 if (!osn_var->sampling) in trace_softirq_entry_callback()
1054 if (!osn_var->sampling) in trace_softirq_exit_callback()
1126 if (!osn_var->sampling) in thread_entry()
1150 if (!osn_var->sampling) in thread_exit()
1452 osn_var->sampling = true; in run_osnoise()
1560 osn_var->sampling = false; in run_osnoise()
[all …]
/linux/arch/mips/kernel/
H A Dentry.S49 # between sampling and return
86 # sampling and return
130 # sampling and return
/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)
/linux/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/Documentation/iio/
H A Dad4695.rst193 the new sampling frequency is the PWM sampling frequency divided by the
197 the new reported sampling rate for that channel will be 2500 (ignoring PWM API
199 sampling frequency to a higher value on that channel will adjust the CNV trigger
200 period for all channels, e.g. if ``voltage0``'s sampling frequency is adjusted
205 For simplicity, the sampling frequency of the device should be set (considering
/linux/Documentation/arch/powerpc/
H A Dimc.rst100 to be monitored and the sampling duration. On each overflow in the CPMCxSEL,
145 CPMC_LOAD contains the sampling duration. SAMPSEL and CPMCxSEL determines the
148 memory and reloads the CMPC_LOAD value for the next sampling duration. IMC
178 also provide a way for the operating system to do instruction sampling in real
/linux/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()
/linux/Documentation/userspace-api/media/v4l/
H A Ddev-sdr.rst47 ADC/DAC sampling rate (sampling frequency) and the possible radio
64 capture and output format. Both the sampling resolution and the data
/linux/Documentation/gpu/
H A Dpanthor.rst40 Users must bear in mind that engine and cycle sampling are disabled by default,
47 Where `N` is a bit mask where cycle and timestamp sampling are respectively
/linux/tools/lib/thermal/
H A DBuild4 libthermal-y += sampling.o
/linux/Documentation/dev-tools/
H A Dgpio-sloppy-logic-analyzer.rst70 parameter. The bus speed is 400kHz. So, the sampling theorem says we need to
72 start condition happen faster, so we need a higher sampling frequency, e.g.
82 still sampling in the background. Unless this has finished, you will not find a
/linux/tools/gpio/
H A Dgpio-sloppy-logic-analyzer.sh31 -c|--cpu <n>: which CPU to isolate for sampling. Only needed once. Default <1>.
32 Remember that a more powerful CPU gives you higher sampling speeds.
42 -s|--sample_freq <SI-n>: desired sampling frequency. Might be capped if too large.

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