| /linux/tools/lib/perf/Documentation/ |
| H A D | libperf-sampling.txt | 1 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.
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| /linux/tools/perf/Documentation/ |
| H A D | perf-amd-ibs.txt | 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 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
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| H A D | perf-arm-spe.txt | 21 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, …
291 assigning PIDs to kernel samples. For userspace sampling this can be ignored.
295 Increase sampling interval (see above)
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| H A D | tips.txt | 35 To change sampling frequency to 100 Hz: perf record -F 100
38 To set sampling period of individual events use perf record -e cpu/cpu-cycles,period=100001/,cpu/branches,period=10001/ ...
60 To show IPC for sampling periods use perf record -e '{cycles,instructions}:S' and then browse context
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| H A D | perf-record.txt | 57 - 'period': Set event sampling period
58 - 'freq': Set event sampling frequency
75 - 'aux-sample-size': Set sample size for AUX area sampling. If the
77 AUX area sampling for the event.
316 doesn't work with branch stack sampling at the same time.
433 Enable taken branch stack sampling. Any type of taken branch may be sampled.
438 Enable taken branch stack sampling. Each sample captures a series of consecutive
461 - save_type: save branch type during sampling in case binary is not available later
464 when the taken branch stack sampling is enabled.
465 - priv: save privilege state during sampling in case binary is not available later
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| /linux/net/psample/ |
| H A D | Kconfig | 3 # psample packet sampling configuration
7 tristate "Packet-sampling netlink channel"
10 Say Y here to add support for packet-sampling netlink channel
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| /linux/Documentation/ABI/testing/ |
| H A D | debugfs-intel-iommu | 162 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
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| H A D | configfs-usb-gadget-uac1 | 9 c_srate list of capture sampling rates (comma-separated)
20 p_srate list of playback sampling rates (comma-separated)
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| H A D | configfs-usb-gadget-uac2 | 9 c_srate list of capture sampling rates (comma-separated)
24 p_srate list of playback sampling rates (comma-separated)
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| /linux/Documentation/admin-guide/hw-vuln/ |
| H A D | index.rst | 18 special-register-buffer-data-sampling
25 reg-file-data-sampling
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| /linux/Documentation/sound/cards/ |
| H A D | maya44.rst | 29 - 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…
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| /linux/arch/mips/kernel/ |
| H A D | entry.S | 49 # between sampling and return
86 # sampling and return
130 # sampling and return
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| /linux/kernel/trace/ |
| H A D | trace_osnoise.c | 210 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()
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| /linux/tools/power/cpupower/bench/ |
| H A D | README-BENCH | 74 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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| /linux/Documentation/devicetree/bindings/mmc/ |
| H A D | cavium-mmc.txt | 22 - cavium,cmd-clk-skew : number of coprocessor clocks before sampling command
23 - cavium,dat-clk-skew : number of coprocessor clocks before sampling data
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| /linux/tools/testing/selftests/powerpc/pmu/ |
| H A D | event.c | 25 int type, char *name, bool sampling) in __event_init_opts() argument
37 if (sampling) { in __event_init_opts()
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| /linux/Documentation/arch/powerpc/ |
| H A D | imc.rst | 100 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
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| /linux/Documentation/userspace-api/media/v4l/ |
| H A D | dev-sdr.rst | 47 ADC/DAC sampling rate (sampling frequency) and the possible radio
64 capture and output format. Both the sampling resolution and the data
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| /linux/tools/lib/thermal/ |
| H A D | Build | 4 libthermal-y += sampling.o
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| /linux/Documentation/dev-tools/ |
| H A D | gpio-sloppy-logic-analyzer.rst | 70 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
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| /linux/Documentation/driver-api/media/drivers/ |
| H A D | cx88-devel.rst | 78 - Setup 4KHz sampling rate (roughly 2x oversampled; good enough for our RC5
81 - enable sampling
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| /linux/Documentation/hwmon/ |
| H A D | adt7410.rst | 59 continuous temperature sampling, as well as sampling one temperature value per
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| /linux/Documentation/translations/zh_CN/mm/damon/ |
| H A D | design.rst | 101 sleep(sampling interval)
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| /linux/Documentation/mm/damon/ |
| H A D | design.rst | 130 and clear the bit(s) for next sampling target address and checks whether the
131 bit(s) set again after one sampling period. This could disturb other kernel
164 monitoring attributes, ``sampling interval``, ``aggregation interval``,
178 ``sampling interval`` and ``aggregation interval``. In detail, DAMON checks
179 access to each page per ``sampling interval`` and aggregates the results. In
194 sleep(sampling interval)
208 one page in the region is required to be checked. Thus, for each ``sampling
210 ``sampling interval``, checks whether the page is accessed meanwhile, and
239 divided by ``sampling interval``). Then, after it reports and clears the
292 cases. Set ``sampling interval`` proportional to ``aggregation interval``. By
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| /linux/Documentation/admin-guide/mm/damon/ |
| H A D | stat.rst | 21 events to be captured in each snapshot, while limiting the resulting sampling
68 DAMON uses sampling, this is only an estimation of the access intensity rather
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