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/linux/drivers/iio/common/inv_sensors/
H A Dinv_sensors_timestamp.c13 /* compute jitter, min and max following jitter in per mille */
48 ts->min_period = INV_SENSORS_TIMESTAMP_MIN(chip->clock_period, chip->jitter); in inv_sensors_timestamp_init()
49 ts->max_period = INV_SENSORS_TIMESTAMP_MAX(chip->clock_period, chip->jitter); in inv_sensors_timestamp_init()
115 int64_t delta, jitter; in inv_align_timestamp_it() local
121 /* adjust timestamp while respecting jitter */ in inv_align_timestamp_it()
124 jitter = INV_SENSORS_TIMESTAMP_JITTER((int64_t)ts->period, ts->chip.jitter); in inv_align_timestamp_it()
125 if (delta > jitter) in inv_align_timestamp_it()
127 else if (delta < -jitter) in inv_align_timestamp_it()
/linux/tools/testing/selftests/rcutorture/bin/
H A Djitterstart.sh4 # Start up the specified number of jitter.sh scripts in the background.
8 # n: Number of jitter.sh scripts to start up.
21 echo jitterstart.sh: Missing count of jitter.sh scripts to start.
36 jitter.sh $jitter_i "${jittering_dir}/jittering" "$@" &
H A Dkvm.sh58 jitter="-1"
79 echo " --jitter N [ maxsleep (us) [ maxspin (us) ] ]"
189 --jitter)
190 …checkarg --jitter "(# threads [ sleep [ spin ] ])" $# "$2" '^-\{,1\}[0-9]\+\( \+[0-9]\+\)\{,2\} *$…
191 jitter="$2"
261 # If you really want jitter for refscale or
263 # or the refscale. (But why jitter in these cases?)
264 jitter=0
467 split(jitter, ja);
527 print "echo Build-only run, so suppressing jitter | tee -a " rd "log"
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H A Djitter.sh5 # of this script is to inflict random OS jitter on a concurrently running
8 # Usage: jitter.sh me jittering-path duration [ sleepmax [ spinmax ] ]
H A Dkvm-transform.sh10 # jitter_dir: Jitter directory for TORTURE_JITTER_START and
42 echo "Need valid jitter directory: '$jitter_dir'"
H A Djitterstop.sh4 # Remove the "jittering" file, signaling the jitter.sh scripts to stop,
/linux/Documentation/timers/
H A Dno_hz.rst8 efficiency and reducing OS jitter. Reducing OS jitter is important for
202 So you enable all the OS-jitter features described in this document,
204 your workload isn't affected that much by OS jitter, or is it because
206 by providing a simple OS-jitter test suite, which is available on branch
213 whether or not you have succeeded in removing OS jitter from your system.
214 If this trace shows that you have removed OS jitter as much as is
216 sensitive to OS jitter.
219 We do not currently have a good way to remove OS jitter from single-CPU
286 of OS jitter, including interrupts and system-utility tasks
290 * Some sources of OS jitter can currently be eliminated only by
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/linux/include/uapi/linux/
H A Dtimex.h81 __kernel_long_t jitter; /* pps jitter (us) (ro) */ member
84 __kernel_long_t jitcnt; /* jitter limit exceeded (ro) */
120 long long jitter; /* pps jitter (us) (ro) */ member
124 long long jitcnt; /* jitter limit exceeded (ro) */
182 #define STA_PPSJITTER 0x0200 /* PPS signal jitter exceeded (ro) */
/linux/kernel/time/
H A Dntp.c46 * @pps_jitter: PPS current jitter in nanoseconds
53 * @pps_jitcnt: PPS monitor: jitter limit exceeded
187 * PPS jitter exceeded when PPS time synchronization in is_error_status()
204 txc->jitter = ntpdata->pps_jitter; in pps_fill_timex()
206 txc->jitter = ntpdata->pps_jitter / NSEC_PER_USEC; in pps_fill_timex()
236 txc->jitter = 0; in pps_fill_timex()
885 /* Get current phase correction and jitter */
886 static inline long pps_phase_filter_get(struct ntp_data *ntpdata, long *jitter) in pps_phase_filter_get() argument
888 *jitter = ntpdata->pps_tf[0] - ntpdata->pps_tf[1]; in pps_phase_filter_get()
889 if (*jitter < 0) in pps_phase_filter_get()
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/linux/crypto/
H A DKconfig1224 tristate "CPU Jitter Non-Deterministic RNG (Random Number Generator)"
1228 CPU Jitter RNG (Random Number Generator) from the Jitterentropy library
1242 prompt "CPU Jitter RNG Memory Size"
1245 The Jitter RNG measures the execution time of memory accesses.
1254 the entropy rate produced by the Jitter RNG can be modified.
1284 int "CPU Jitter RNG Oversampling Rate"
1288 The Jitter RNG allows the specification of an oversampling rate (OSR).
1289 The Jitter RNG operation requires a fixed amount of timing
1293 by the OSR factor. The oversampling allows the Jitter RNG to operate
1296 trade-off, however, is that the Jitter RNG now requires more time
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/linux/include/linux/usb/
H A Dmidi-v2.h41 #define USB_MS_MIDI_PROTO_1_0_64_JRTS 0x02 /* MIDI 1.0, UMP up to 64bits, Jitter Reduction Timestam…
43 #define USB_MS_MIDI_PROTO_1_0_128_JRTS 0x04 /* MIDI 1.0, UMP up to 128bits, Jitter Reduction Timest…
45 #define USB_MS_MIDI_PROTO_2_0_JRTS 0x12 /* MIDI 2.0, Jitter Reduction Timestamps */
/linux/net/sched/
H A Dsch_netem.c44 packets and add random jitter (and correlation). The random
78 /* a linear queue; reduces rbtree rebalancing when jitter is low */
90 s64 jitter; member
482 if (q->latency || q->jitter || q->rate) in netem_enqueue()
558 delay = tabledist(q->latency, q->jitter, in netem_enqueue()
1064 q->jitter = PSCHED_TICKS2NS(qopt->jitter); in netem_change()
1102 q->jitter = nla_get_s64(tb[TCA_NETEM_JITTER64]); in netem_change()
1110 /* capping jitter to the range acceptable by tabledist() */ in netem_change()
1111 q->jitter = min_t(s64, abs(q->jitter), INT_MAX); in netem_change()
1220 qopt.jitter = min_t(psched_time_t, PSCHED_NS2TICKS(q->jitter), in netem_dump()
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/linux/include/net/
H A Dieee8021q.h17 * @IEEE8021Q_TT_VI: Video, < 100 ms latency and jitter
18 * @IEEE8021Q_TT_VO: Voice, < 10 ms latency and jitter
/linux/Documentation/sound/cards/
H A Dimg-spdif-in.rst43 This control is used to modify the locking/jitter rejection characteristics
44 of the block. Larger values increase the locking range, but reduce jitter
/linux/drivers/iio/frequency/
H A DKconfig15 tristate "Analog Devices AD9523 Low Jitter Clock Generator"
18 Say yes here to build support for Analog Devices AD9523 Low Jitter
/linux/drivers/media/pci/mantis/
H A Dmantis_pcmcia.c28 * again, definitely it is jitter alone
52 * again, definitely it is jitter alone
/linux/kernel/trace/
H A Dtrace_clock.c11 * - medium: scalable global clock with some jitter
54 * jitter between CPUs. So it's a pretty scalable clock, but there
/linux/drivers/input/touchscreen/
H A Dmk712.c21 * 1999-12-19: added anti-jitter code, report pen-up events, fixed mk712_poll
24 * 2000-01-05: checked in new anti-jitter code, changed mouse protocol, fixed
/linux/include/linux/
H A Dtrace_clock.h10 * - medium: scalable global clock with some jitter
H A DmISDNdsp.h35 int unclocked; /* data is not clocked (has jitter/loss) */
/linux/drivers/hte/
H A DKconfig10 less jitter. This framework provides a generic interface to such HTE
/linux/drivers/clk/
H A Dclk-max77686.c258 /* MAX77802: Enable low-jitter mode on the 32khz clocks. */ in max77686_clk_probe()
264 dev_err(dev, "Failed to config low-jitter: %d\n", ret); in max77686_clk_probe()
H A DKconfig54 tristate "Ti LMK04832 JESD204B Compliant Clock Jitter Cleaner"
59 Low-Noise JESD204B Compliant Clock Jitter Cleaner With Dual Loop PLLs
451 and jitter attenuator ICs with fractional and integer dividers.
/linux/Documentation/devicetree/bindings/clock/
H A Dstarfive,jh7110-pll.yaml10 These PLLs are high speed, low jitter frequency synthesizers in the JH7110.
/linux/drivers/net/wireguard/
H A Dtimers.c14 * `REKEY_TIMEOUT + jitter` ms.
21 * jitter` ms.

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