| /linux/Documentation/tools/rtla/ |
| A D | rtla-hwnoise.rst | 7 Detect and quantify hardware-related noise
23 noise is allowed.
41 The tool is set to detect any noise higher than *one microsecond*,
61 all noise that the tool observed, and the *% CPU Aval* is the relation
64 The *Max Noise* column is the maximum hardware noise the tool detected in a
65 single period, and the *Max Single* is the maximum single noise seen.
67 The *HW* and *NMI* columns show the total number of *hardware* and *NMI* noise
73 noise to the application, but it was certainly caused by more than one single
74 noise, as the *Max Single* noise was of *3 us*. The CPU has *HW noise,* at a
78 The tool should report *0* hardware-related noise in the ideal situation.
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| A D | rtla-osnoise.rst | 5 Measure the operating system noise
20 a summary of the noise of the operating system, including the counters of
22 for each noise via the **osnoise:** tracepoints. The **rtla osnoise top**
24 The **rtla osnoise hist** mode displays information about the noise using
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| /linux/Documentation/trace/ |
| A D | osnoise-tracer.rst | 8 NMIs, IRQs, SoftIRQs, and any other system thread can cause noise to the
13 source of noise: *hardware noise*.
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.
130 workload, allowing only IRQ and hardware-related noise.
142 - osnoise:nmi_noise: noise from NMI, including the duration.
143 - osnoise:irq_noise: noise from an IRQ, including the duration.
144 - osnoise:softirq_noise: noise from a SoftIRQ, including the
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| /linux/drivers/media/dvb-frontends/ |
| A D | lgdt330x.c | 496 u32 noise; /* noise value */ in lgdt3302_read_snr() local
505 noise = ((buf[0] & 7) << 16) | (buf[1] << 8) | buf[2]; in lgdt3302_read_snr()
517 noise = ((buf[0] & 3) << 8) | buf[1]; in lgdt3302_read_snr()
531 state->snr = calculate_snr(noise, c); in lgdt3302_read_snr()
533 dprintk(state, "noise = 0x%08x, snr = %d.%02d dB\n", noise, in lgdt3302_read_snr()
543 u32 noise; /* noise value */ in lgdt3303_read_snr() local
552 noise = ((buf[0] & 0x78) << 13) | (buf[1] << 8) | buf[2]; in lgdt3303_read_snr()
557 noise = ((buf[0] & 7) << 16) | (buf[3] << 8) | buf[4]; in lgdt3303_read_snr()
564 noise = (buf[0] << 8) | buf[1]; in lgdt3303_read_snr()
576 state->snr = calculate_snr(noise, c); in lgdt3303_read_snr()
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| A D | or51132.c | 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()
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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| /linux/drivers/net/wireless/ath/ |
| A D | spectral_common.h | 56 s8 noise; member
100 __be16 noise; member
124 __be32 noise; member
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| /linux/Documentation/ABI/testing/ |
| 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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| A D | sysfs-bus-iio-adc-ad4130 | 7 * "sinc4" - Sinc 4. Excellent noise performance. Long
14 Good noise performance.
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| /linux/drivers/net/wireless/intel/iwlwifi/mvm/tests/ |
| A D | scan.c | 86 notif.noise[i] = params->neg_dbm[i]; in KUNIT_ARRAY_PARAM_DESC()
93 notif.noise[ARRAY_SIZE(params->neg_dbm) - i - 1] = in KUNIT_ARRAY_PARAM_DESC()
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| /linux/tools/testing/selftests/bpf/progs/ |
| A D | tailcall_bpf2bpf4.c | 20 int noise = 0; variable
33 if (noise) in subprog_tail_2()
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| /linux/Documentation/userspace-api/media/dvb/ |
| 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/drivers/net/wireless/mediatek/mt76/ |
| A D | mt792x_mac.c | 243 if (!phy->noise) in mt792x_phy_update_channel()
244 phy->noise = nf << 4; in mt792x_phy_update_channel()
246 phy->noise += nf - (phy->noise >> 4); in mt792x_phy_update_channel()
253 state->noise = -(phy->noise >> 4); in mt792x_phy_update_channel()
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| /linux/Documentation/sound/soc/ |
| A D | pops-clicks.rst | 8 powered up and causes a popping noise on the speakers).
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/drivers/media/pci/cx88/ |
| A D | cx88-dsp.c | 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()
193 carrier, stereo, dual, noise); in detect_a2_a2m_eiaj()
216 (noise < 10) && in detect_a2_a2m_eiaj()
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| /linux/Documentation/userspace-api/media/drivers/ |
| 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/devicetree/bindings/input/touchscreen/ |
| A D | tsc2007.txt | 16 If set, it will permit noise in the data up to +- the value given to the fuzz
17 parameter, that is used to filter noise from the event stream.
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| A D | touchscreen.yaml | 48 description: horizontal noise value of the absolute input device (in pixels)
52 description: vertical noise value of the absolute input device (in pixels)
56 description: pressure noise value of the absolute input device (arbitrary
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| A D | hycon,hy46xx.yaml | 64 hycon,noise-filter-enable:
66 description: Allows enabling power noise filter.
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| /linux/Documentation/devicetree/bindings/iio/proximity/ |
| 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/kernel/trace/ |
| A D | trace_osnoise.c | 324 u64 noise; /* noise */ member
512 entry->noise = sample->noise; in __trace_osnoise_sample()
1426 s64 noise = 0, max_noise = 0; in run_osnoise() local
1495 noise = time_sub(sample, last_sample); in run_osnoise()
1500 if (noise < 0) { in run_osnoise()
1520 if (noise >= threshold) { in run_osnoise()
1523 if (noise > max_noise) in run_osnoise()
1524 max_noise = noise; in run_osnoise()
1529 sum_noise += noise; in run_osnoise()
1534 if (noise > stop_in) in run_osnoise()
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| /linux/Documentation/devicetree/bindings/iio/accel/ |
| A D | adi,adxl355.yaml | 7 title: Analog Devices ADXL355 and ADXL359 3-Axis, Low noise MEMS Accelerometers
13 Analog Devices ADXL355 and ADXL359 3-Axis, Low noise MEMS Accelerometers that
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| /linux/drivers/net/wireless/ath/ath9k/ |
| A D | calib.c | 72 s8 noise = ATH_DEFAULT_NOISE_FLOOR; in ath9k_hw_getchan_noise() local
78 noise += delta; in ath9k_hw_getchan_noise()
80 return noise; in ath9k_hw_getchan_noise()
435 ah->noise = ath9k_hw_getchan_noise(ah, chan, chan->noisefloor); in ath9k_hw_getnf()
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| /linux/drivers/net/wireless/realtek/rtl818x/rtl8187/ |
| A D | rtl8187.h | 46 u8 noise; member
136 u8 noise; member
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| /linux/Documentation/sound/designs/ |
| A D | powersave.rst | 34 Note that you might hear click noise/pop when changing the power
42 consumption, but might result in longer wake-up time and click noise.
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| /linux/drivers/net/wireguard/ |
| A D | Makefile | 4 wireguard-y += noise.o
|