| /linux-5.19.10/Documentation/admin-guide/ ! |
| D | kernel-per-CPU-kthreads.rst | 2 Reducing OS jitter due to per-cpu kthreads
6 options to control their OS jitter. Note that non-per-CPU kthreads are
7 not listed here. To reduce OS jitter from non-per-CPU kthreads, bind
26 - In order to locate kernel-generated OS jitter on CPU N:
43 To reduce its OS jitter, do any of the following:
62 To reduce its OS jitter, do the following:
73 To reduce its OS jitter, do one of the following:
87 To reduce its OS jitter, each softirq vector must be handled
202 housekeeping CPUs, which can tolerate OS jitter.
228 To reduce its OS jitter, do any of the following:
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| /linux-5.19.10/kernel/time/ ! |
| D | ntp.c | 197 txc->jitter = pps_jitter; in pps_fill_timex()
199 txc->jitter = pps_jitter / NSEC_PER_USEC; in pps_fill_timex()
229 txc->jitter = 0; in pps_fill_timex()
877 static inline long pps_phase_filter_get(long *jitter) in pps_phase_filter_get() argument
879 *jitter = pps_tf[0] - pps_tf[1]; in pps_phase_filter_get()
880 if (*jitter < 0) in pps_phase_filter_get()
881 *jitter = -*jitter; in pps_phase_filter_get()
991 long jitter; in hardpps_update_phase() local
995 correction = pps_phase_filter_get(&jitter); in hardpps_update_phase()
1001 if (jitter > (pps_jitter << PPS_POPCORN)) { in hardpps_update_phase()
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| D | time.c | 307 txc->jitter = tx32.jitter; in get_old_timex32()
336 tx32.jitter = txc->jitter; in put_old_timex32()
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| /linux-5.19.10/drivers/staging/greybus/tools/ ! |
| D | README.loopback | 180 requests per-sec: min=390, max=547, average=469.299988, jitter=157
181 ap-throughput B/s: min=90480 max=126904 average=108762.101562 jitter=36424
182 ap-latency usec: min=1826 max=2560 average=2146.000000 jitter=734
183 apbridge-latency usec: min=1620 max=1982 average=1882.099976 jitter=362
184 gpbridge-latency usec: min=56 max=57 average=57.099998 jitter=1
194 requests per-sec: min=397, max=538, average=461.700012, jitter=141
195 ap-throughput B/s: min=92104 max=124816 average=106998.898438 jitter=32712
196 ap-latency usec: min=1856 max=2514 average=2185.699951 jitter=658
197 apbridge-latency usec: min=1460 max=2296 average=1828.599976 jitter=836
198 gpbridge-latency usec: min=56 max=57 average=57.099998 jitter=1
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| /linux-5.19.10/tools/testing/selftests/rcutorture/bin/ ! |
| D | jitterstart.sh | 21 echo jitterstart.sh: Missing count of jitter.sh scripts to start.
36 jitter.sh $jitter_i "${jittering_dir}/jittering" "$@" &
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| D | kvm.sh | 57 jitter="-1"
177 --jitter)
178 …checkarg --jitter "(# threads [ sleep [ spin ] ])" $# "$2" '^-\{,1\}[0-9]\+\( \+[0-9]\+\)\{,2\} *$…
179 jitter="$2"
249 jitter=0
462 split(jitter, ja);
580 -v jitter="$jitter" \
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| /linux-5.19.10/include/uapi/linux/ ! |
| D | timex.h | 81 __kernel_long_t jitter; /* pps jitter (us) (ro) */ member
120 long long jitter; /* pps jitter (us) (ro) */ member
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| D | pkt_sched.h | 617 __u32 jitter; /* random jitter in latency (us) */ member
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| /linux-5.19.10/net/sched/ ! |
| D | sch_netem.c | 86 s64 jitter; member
470 if (q->latency || q->jitter || q->rate) in netem_enqueue()
536 delay = tabledist(q->latency, q->jitter, in netem_enqueue()
1003 q->jitter = PSCHED_TICKS2NS(qopt->jitter); in netem_change()
1036 q->jitter = nla_get_s64(tb[TCA_NETEM_JITTER64]); in netem_change()
1045 q->jitter = min_t(s64, abs(q->jitter), INT_MAX); in netem_change()
1151 qopt.jitter = min_t(psched_time_t, PSCHED_NS2TICKS(q->jitter), in netem_dump()
1163 if (nla_put(skb, TCA_NETEM_JITTER64, sizeof(q->jitter), &q->jitter)) in netem_dump()
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| /linux-5.19.10/Documentation/timers/ ! |
| D | no_hz.rst | 8 efficiency and reducing OS jitter. Reducing OS jitter is important for
205 So you enable all the OS-jitter features described in this document,
207 your workload isn't affected that much by OS jitter, or is it because
209 by providing a simple OS-jitter test suite, which is available on branch
216 whether or not you have succeeded in removing OS jitter from your system.
217 If this trace shows that you have removed OS jitter as much as is
219 sensitive to OS jitter.
222 We do not currently have a good way to remove OS jitter from single-CPU
289 of OS jitter, including interrupts and system-utility tasks
293 * Some sources of OS jitter can currently be eliminated only by
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| /linux-5.19.10/Documentation/sound/cards/ ! |
| D | img-spdif-in.rst | 43 This control is used to modify the locking/jitter rejection characteristics
44 of the block. Larger values increase the locking range, but reduce jitter
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| /linux-5.19.10/include/linux/ ! |
| D | time32.h | 40 s32 jitter; member
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| /linux-5.19.10/drivers/hte/ ! |
| D | Kconfig | 10 less jitter. This framework provides a generic interface to such HTE
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| /linux-5.19.10/arch/mips/include/asm/octeon/ ! |
| D | cvmx-spxx-defs.h | 427 uint64_t jitter:3; member
439 uint64_t jitter:3;
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| /linux-5.19.10/kernel/rcu/ ! |
| D | Kconfig | 243 Use this option to reduce OS jitter for aggressive HPC or
246 asymmetric multiprocessors. The price of this reduced jitter
262 Say Y here if you need reduced OS jitter, despite added overhead.
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| /linux-5.19.10/Documentation/scsi/ ! |
| D | lpfc.rst | 33 jitter, or a device temporarily loses connectivity (due to its cable
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| /linux-5.19.10/tools/perf/Documentation/ ! |
| D | perf-arm-spe.txt | 137 jitter=1 - use jitter to avoid resonance when sampling (PMSIRR.RND)
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| /linux-5.19.10/Documentation/driver-api/ ! |
| D | pps.rst | 75 you should take into account the latencies and jitter introduced by
77 synchronized with PPS through USB. With USB 2.0, jitter may decrease
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| /linux-5.19.10/Documentation/devicetree/bindings/pci/ ! |
| D | fsl,imx6q-pcie.yaml | 125 Note that the IMX6 LVDS clock outputs do not meet gen2 jitter
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| /linux-5.19.10/drivers/net/dsa/sja1105/ ! |
| D | sja1105_static_config.h | 412 u64 jitter; member
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| /linux-5.19.10/drivers/perf/ ! |
| D | arm_spe_pmu.c | 227 GEN_PMU_FORMAT_ATTR(jitter);
323 reg |= ATTR_CFG_GET_FLD(attr, jitter) << SYS_PMSIRR_EL1_RND_SHIFT; in arm_spe_event_to_pmsirr()
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| /linux-5.19.10/arch/mips/cavium-octeon/executive/ ! |
| D | cvmx-spi.c | 279 spxx_trn4_ctl.s.jitter = 1; in cvmx_spi_reset_cb()
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| /linux-5.19.10/tools/include/uapi/linux/ ! |
| D | pkt_sched.h | 597 __u32 jitter; /* random jitter in latency (us) */ member
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| /linux-5.19.10/Documentation/devicetree/bindings/net/ ! |
| D | micrel-ksz90x1.txt | 156 clock because the clock jitter in slave mode is to high (errata#2).
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| /linux-5.19.10/drivers/isdn/hardware/mISDN/ ! |
| D | hfc_multi.h | 47 int jitter; member
|