| /linux/Documentation/trace/ |
| H A D | osnoise-tracer.rst | 6 Noise (*osnoise*) refers to the interference experienced by an application
8 NMIs, IRQs, SoftIRQs, and any other system thread can cause noise to the
9 system. Moreover, hardware-related jobs can also cause noise, for example,
13 source of noise: *hardware noise*.
36 events. When a noise happens without any interference from the operating
37 system level, the hardware noise counter increases, pointing to a
38 hardware-related noise. In this way, osnoise can account for any
40 prints the sum of all noise, the max single noise, the percentage of CPU
41 available for the thread, and the counters for the noise sources.
64 …# |||| RUNTIME NOISE % OF CPU NOISE +-------…
[all …]
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| /linux/include/trace/events/ |
| H A D | osnoise.h | 15 u64 noise; /* noise */ member
16 u64 max_sample; /* max single noise sample */
46 __field( u64, noise )
57 __entry->noise = s->noise;
66 TP_printk("runtime=%llu noise=%llu max_sample=%llu hw_count=%d"
70 __entry->noise,
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| /linux/Documentation/sound/soc/ |
| H A D | pops-clicks.rst | 8 powered up and causes a popping noise on the speakers).
48 Zipper Noise
50 An unwanted zipper noise can occur within the audio playback or capture stream
51 when a volume control is changed near its maximum gain value. The zipper noise
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| /linux/Documentation/ABI/testing/ |
| H A D | sysfs-bus-iio-adc-mcp3564 | 32 conversions, which is on the order of magnitude of the noise
45 1/f noise into the system that can be modulated with the
49 greatly reduces (cancels out) the 1/f noise and cancels the
51 the system is not affected by this 1/f noise component of the
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| /linux/include/linux/input/ |
| H A D | cma3000.h | 26 * @fuzz_x: Noise on X Axis
27 * @fuzz_y: Noise on Y Axis
28 * @fuzz_z: Noise on Z Axis
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| /linux/include/linux/mfd/ |
| H A D | ac100.h | 99 #define AC100_ADC_DAP_N_TH 0x8e /* Noise Threshold */
100 #define AC100_ADC_DAP_L_H_N_A_C 0x8f /* Left High Noise Avg. Coef */
101 #define AC100_ADC_DAP_L_L_N_A_C 0x90 /* Left Low Noise Avg. Coef */
102 #define AC100_ADC_DAP_R_H_N_A_C 0x91 /* Right High Noise Avg. Coef */
103 #define AC100_ADC_DAP_R_L_N_A_C 0x92 /* Right Low Noise Avg. Coef */
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| /linux/drivers/media/pci/cx88/ |
| H A D | cx88-dsp.c | 142 /* The last 192 samples are enough for noise detection */ in noise_magnitude()
159 s32 carrier, stereo, dual, noise; in detect_a2_a2m_eiaj() local
189 noise = noise_magnitude(x, N, FREQ_NOISE_START, FREQ_NOISE_END); in detect_a2_a2m_eiaj()
192 "detect a2/a2m/eiaj: carrier=%d, stereo=%d, dual=%d, noise=%d\n", in detect_a2_a2m_eiaj()
193 carrier, stereo, dual, noise); in detect_a2_a2m_eiaj()
208 * so we probably don't need noise detection in detect_a2_a2m_eiaj()
216 (noise < 10) && in detect_a2_a2m_eiaj()
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| /linux/kernel/trace/ |
| H A D | trace_osnoise.c | 3 * OS Noise Tracer: computes the OS Noise suffered by a running thread.
455 seq_puts(s, " NOISE %% OF CPU NOISE +-----------------------------+\n"); in print_osnoise_headers()
479 seq_puts(s, " NOISE %% OF CPU NOISE +-----------------------------+\n"); in print_osnoise_headers()
512 entry->noise = sample->noise; in __record_osnoise_sample()
879 * occurrence, compute the noise caused by the NMI, and to remove the noise
942 * Computes the duration of the IRQ noise, and trace it. Also discounts the
943 * interference from other sources of noise could be currently being accounted.
1073 * Computes the duration of the softirq noise, and trace it. Also discounts the
1074 * interference from other sources of noise could be currently being accounted.
1145 * thread_entry - Record the starting of a thread noise window
[all …]
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| /linux/drivers/media/dvb-frontends/ |
| H A D | or51132.c | 229 /* Auto CH, Auto NTSC rej, MPEGser, MPEG2tr, phase noise-high */ in or51132_setmode()
237 Auto-deinterleave; MPEGser, MPEG2tr, phase noise-high in or51132_setmode()
461 int noise, reg; in or51132_read_snr() local
467 noise = or51132_readreg(state, 0x02); in or51132_read_snr()
468 if (noise < 0) { in or51132_read_snr()
472 dprintk("read_snr noise (%d)\n", noise); in or51132_read_snr()
500 /* Calculate SNR using noise, c, and NTSC rejection correction */ in or51132_read_snr()
501 state->snr = calculate_snr(noise, c) - usK; in or51132_read_snr()
504 dprintk("%s: noise = 0x%08x, snr = %d.%02d dB\n", __func__, noise, in or51132_read_snr()
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| H A D | dib3000mb_priv.h | 139 /* impulse noise parameter */
173 /* phase noise */
174 /* 36 is set when setting the impulse noise */
255 /* phase noise compensation inhibition */
460 /* noise power (24) */
469 * used to calculate the signal/noise - ratio
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| /linux/drivers/net/wireless/ath/ |
| H A D | spectral_common.h | 56 s8 noise; member
100 __be16 noise; member
124 __be32 noise; member
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| /linux/drivers/net/wireless/ath/ath5k/ |
| H A D | ani.c | 27 * Adaptive Noise Immunity (ANI) controls five noise immunity parameters
33 * - "noise immunity"
61 * ath5k_ani_set_noise_immunity_level() - Set noise immunity level
86 ATH5K_ERR(ah, "noise immunity level %d out of range", in ath5k_ani_set_noise_immunity_level()
213 * ath5k_ani_raise_immunity() - Increase noise immunity
219 * Try to raise noise immunity (=decrease sensitivity) in several steps
231 /* first: raise noise immunity */ in ath5k_ani_raise_immunity()
302 * ath5k_ani_lower_immunity() - Decrease noise immunity
306 * Try to lower noise immunity (=increase sensitivity) in several steps
357 /* finally, reduce noise immunity */ in ath5k_ani_lower_immunity()
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| /linux/sound/soc/codecs/ |
| H A D | wm8997.c | 250 ARIZONA_MIXER_CONTROLS("Noise", ARIZONA_NOISEMIX_INPUT_1_SOURCE),
252 SOC_SINGLE_TLV("Noise Generator Volume", ARIZONA_COMFORT_NOISE_GENERATOR,
296 SOC_SINGLE("Noise Gate Switch", ARIZONA_NOISE_GATE_CONTROL,
298 SOC_SINGLE_TLV("Noise Gate Threshold Volume", ARIZONA_NOISE_GATE_CONTROL,
300 SOC_ENUM("Noise Gate Hold", arizona_ng_hold),
345 ARIZONA_MIXER_ENUMS(Noise, ARIZONA_NOISEMIX_INPUT_1_SOURCE);
427 SND_SOC_DAPM_SIGGEN("NOISE"),
459 SND_SOC_DAPM_PGA("Noise Generator", ARIZONA_COMFORT_NOISE_GENERATOR,
644 ARIZONA_MIXER_WIDGETS(Noise, "Noise"),
[all...] |
| /linux/Documentation/input/devices/ |
| H A D | cma3000_d0x.rst | 50 Noise on X Axis
53 Noise on Y Axis
56 Noise on Z Axis
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| /linux/drivers/net/wireless/intel/iwlwifi/dvm/ |
| H A D | dev.h | 41 /* Default noise level to report when noise measurement is not available.
44 * 2) Scanning (noise measurement does not apply to associated channel)
45 * Use default noise value of -127 ... this is below the range of measurable
48 * noise info (e.g. averaging might be done in app); measured dBm values are
259 /* Sensitivity and chain noise calibration */
338 /* Chain noise (differential Rx gain) calib data */
573 * @chain_noise_scale: default chain noise scale used for gain computation
795 * chain noise reset and gain commands are the
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| /linux/tools/tracing/rtla/tests/ |
| H A D | hwnoise.t | 10 check "detect noise higher than one microsecond" \
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| /linux/tools/tracing/rtla/src/ |
| H A D | osnoise_top.c | 97 tep_get_field_val(s, event, "noise", record, &val, 1); in osnoise_top_handler()
140 trace_seq_printf(s, "Operating System Noise"); in osnoise_top_header()
143 trace_seq_printf(s, "Hardware-related Noise"); in osnoise_top_header()
158 trace_seq_printf(s, " Noise "); in osnoise_top_header()
160 trace_seq_printf(s, " Max Noise Max Single "); in osnoise_top_header()
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| /linux/Documentation/userspace-api/media/drivers/ |
| H A D | thp7312.rst | 35 Enable/Disable auto noise reduction.
38 Set the noise reduction strength, where 0 is the weakest and 10 is the
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| /linux/Documentation/userspace-api/media/dvb/ |
| H A D | fe-read-snr.rst | 31 The signal-to-noise ratio is stored into \*snr.
36 This ioctl call returns the signal-to-noise ratio for the signal
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| /linux/tools/testing/selftests/bpf/progs/ |
| H A D | tailcall_bpf2bpf4.c | 20 int noise = 0; variable
33 if (noise) in subprog_tail_2()
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| /linux/drivers/net/wireless/intel/iwlwifi/mld/ |
| H A D | scan.h | 154 * @noise: channel noise in dBm
159 s8 noise; member
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| /linux/drivers/staging/media/atomisp/pci/isp/kernels/bnr/bnr_1.0/ |
| H A D | ia_css_bnr.host.c | 21 /* BNR (Bayer Noise Reduction) */ in ia_css_bnr_encode()
41 ia_css_debug_dtrace(level, "Bayer Noise Reduction:\n"); in ia_css_bnr_dump()
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| /linux/drivers/net/wireless/broadcom/b43/ |
| H A D | tables_nphy.h | 113 #define B43_NTAB_NOISEVAR10 B43_NTAB32(0x10, 0x000) /* Noise Var Table 10 */
115 #define B43_NTAB_NOISEVAR11 B43_NTAB32(0x10, 0x080) /* Noise Var Table 11 */
147 #define B43_NTAB_NOISEVAR_R3 B43_NTAB32(16, 0) /* noise variance */
171 #define B43_NTAB_NOISEVAR_R7 B43_NTAB32(16, 0) /* noise variance */
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| /linux/Documentation/devicetree/bindings/iio/proximity/ |
| H A D | ams,as3935.yaml | 42 Set the noise and watchdog threshold register on startup. This will
43 need to set according to the noise from the MCU board, and possibly
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| /linux/Documentation/devicetree/bindings/iio/adc/ |
| H A D | lltc,ltc2497.yaml | 15 low noise, low power, 2-channel, 12-bit successive approximation ADC with an
21 low noise, low power, 8-channel, 12-bit successive approximation ADC with an
|