| /linux/Documentation/tools/rtla/ |
| H 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
71 *86 us* of noise during the entire execution, leaving *99.99997 %* of CPU time
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
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| H 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/ |
| H A D | osnoise-tracer.rst | 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.
82 - The NOISE IN US reports the sum of noise in microseconds observed
86 - The MAX SINGLE NOISE IN US reports the maximum single noise observed
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| /linux/drivers/media/dvb-frontends/ |
| H 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()
510 noise = ((buf[0] & 7 << 3) << 13) | (buf[3] << 8) | buf[4]; 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()
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| H 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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| H A D | lgdt3305.c | 986 u32 noise; /* noise value */ in lgdt3305_read_snr() local
994 noise = ((read_reg(state, LGDT3305_PT_MSE_1) & 0x07) << 16) | in lgdt3305_read_snr()
1001 noise = ((read_reg(state, LGDT3305_EQ_MSE_1) & 0x0f) << 16) | in lgdt3305_read_snr()
1009 noise = (read_reg(state, LGDT3305_CR_MSE_1) << 8) | in lgdt3305_read_snr()
1019 state->snr = calculate_snr(noise, c); in lgdt3305_read_snr()
1022 lg_dbg("noise = 0x%08x, snr = %d.%02d dB\n", noise, in lgdt3305_read_snr()
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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/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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| H A D | sysfs-bus-iio-proximity-as3935 | 14 When 1 the noise level is over the trip level and not reporting
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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/mvm/tests/ |
| H 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/drivers/net/wireless/mediatek/mt76/ |
| H 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/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/Documentation/sound/soc/ |
| H 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/ |
| H 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/ |
| 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/devicetree/bindings/input/touchscreen/ |
| H 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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| H A D | brcm,iproc-touchscreen.txt | 55 - touchscreen-fuzz-x: horizontal noise value of the absolute input
57 - touchscreen-fuzz-y: vertical noise value of the absolute input
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| /linux/kernel/trace/ |
| H A D | trace_osnoise.c | 324 u64 noise; /* noise */ member
511 entry->noise = sample->noise; in __trace_osnoise_sample()
1420 s64 noise = 0, max_noise = 0; in run_osnoise() local
1489 noise = time_sub(sample, last_sample); in run_osnoise()
1494 if (noise < 0) { in run_osnoise()
1514 if (noise >= threshold) { in run_osnoise()
1517 if (noise > max_noise) in run_osnoise()
1518 max_noise = noise; in run_osnoise()
1523 sum_noise += noise; in run_osnoise()
1525 trace_sample_threshold(last_sample, noise, interference); in run_osnoise()
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| /linux/drivers/net/wireless/ath/ath9k/ |
| H 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/ |
| H A D | rtl8187.h | 46 u8 noise; member
136 u8 noise; member
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| /linux/Documentation/sound/designs/ |
| H 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/fs/jffs2/ |
| H A D | scan.c | 27 #define noisy_printk(noise, fmt, ...) \ argument
29 if (*(noise)) { \
31 (*(noise))--; \
32 if (!(*(noise))) \
452 int noise = 0; in jffs2_scan_eraseblock() local
610 noise = 10; in jffs2_scan_eraseblock()
749 noisy_printk(&noise, "%s(): Magic bitmask 0x%04x not found at 0x%08x: 0x%04x instead\n", in jffs2_scan_eraseblock()
765 …noisy_printk(&noise, "%s(): Node at 0x%08x {0x%04x, 0x%04x, 0x%08x) has invalid CRC 0x%08x (calcul… in jffs2_scan_eraseblock()
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| /linux/drivers/net/wireguard/ |
| H A D | Makefile | 4 wireguard-y += noise.o
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| /linux/scripts/ |
| H A D | spdxexclude | 6 # create lots of noise for no value
|