| /linux-4.1.27/kernel/time/ |
| D | ntp.c | 188 txc->jitter = pps_jitter; in pps_fill_timex()
190 txc->jitter /= NSEC_PER_USEC; in pps_fill_timex()
220 txc->jitter = 0; in pps_fill_timex()
746 static inline long pps_phase_filter_get(long *jitter) in pps_phase_filter_get() argument
748 *jitter = pps_tf[0] - pps_tf[1]; in pps_phase_filter_get()
749 if (*jitter < 0) in pps_phase_filter_get()
750 *jitter = -*jitter; in pps_phase_filter_get()
860 long jitter; in hardpps_update_phase() local
864 correction = pps_phase_filter_get(&jitter); in hardpps_update_phase()
870 if (jitter > (pps_jitter << PPS_POPCORN)) { in hardpps_update_phase()
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| /linux-4.1.27/Documentation/ |
| D | kernel-per-CPU-kthreads.txt | 4 options to control their OS jitter. Note that non-per-CPU kthreads are
5 not listed here. To reduce OS jitter from non-per-CPU kthreads, bind
24 o In order to locate kernel-generated OS jitter on CPU N:
37 To reduce its OS jitter, do any of the following:
51 To reduce its OS jitter, do the following:
57 To reduce its OS jitter, do one of the following:
66 To reduce its OS jitter, each softirq vector must be handled
142 to housekeeping CPUs, which can tolerate OS jitter.
162 To reduce its OS jitter, do any of the following:
176 3. Do any of the following needed to avoid jitter that your
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| D | 00-INDEX | 265 - List of all per-CPU kthreads and how they introduce jitter.
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| D | kernel-parameters.txt | 2434 nojitter [IA-64] Disables jitter checking for ITC timers.
2989 is the CPU number. This reduces OS jitter on the
3336 enabled if running jitter sensitive (HPC/RT) workloads.
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| /linux-4.1.27/Documentation/timers/ |
| D | NO_HZ.txt | 6 efficiency and reducing OS jitter. Reducing OS jitter is important for
234 So you enable all the OS-jitter features described in this document,
236 your workload isn't affected that much by OS jitter, or is it because
238 by providing a simple OS-jitter test suite, which is available on branch
245 whether or not you have succeeded in removing OS jitter from your system.
246 If this trace shows that you have removed OS jitter as much as is
248 sensitive to OS jitter.
251 We do not currently have a good way to remove OS jitter from single-CPU
317 of OS jitter, including interrupts and system-utility tasks
321 o Some sources of OS jitter can currently be eliminated only by
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| /linux-4.1.27/net/sched/ |
| D | sch_netem.c | 81 psched_tdiff_t jitter; member
432 if (q->latency || q->jitter) in netem_enqueue()
477 delay = tabledist(q->latency, q->jitter, in netem_enqueue()
848 q->jitter = qopt->jitter; in netem_change()
971 qopt.jitter = q->jitter; in netem_dump()
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| /linux-4.1.27/include/uapi/linux/ |
| D | timex.h | 80 __kernel_long_t jitter; /* pps jitter (us) (ro) */ member
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| D | pkt_sched.h | 540 __u32 jitter; /* random jitter in latency (us) */ member
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| /linux-4.1.27/arch/mips/include/asm/octeon/ |
| D | cvmx-spxx-defs.h | 483 uint64_t jitter:3; member
495 uint64_t jitter:3;
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| /linux-4.1.27/kernel/ |
| D | compat.c | 51 __get_user(txc->jitter, &utp->jitter) || in compat_get_timex()
79 __put_user(txc->jitter, &utp->jitter) || in compat_put_timex()
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| /linux-4.1.27/Documentation/scsi/ |
| D | lpfc.txt | 35 jitter, or a device temporarily loses connectivity (due to its cable
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| /linux-4.1.27/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-4.1.27/drivers/isdn/hardware/mISDN/ |
| D | hfc_multi.h | 46 int jitter; member
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| D | hfcmulti.c | 2518 hc->chan[hc->dnum[0]].jitter | V_RX_INIT); in handle_timer_irq()
2520 hc->chan[hc->dnum[0]].jitter | V_RX_INIT); in handle_timer_irq()
4802 hc->chan[hc->dnum[0]].jitter = (port[Port_cnt]>>12) & 0x3; in init_e1_port_hw()
4807 __func__, hc->chan[hc->dnum[0]].jitter, in init_e1_port_hw()
4810 hc->chan[hc->dnum[0]].jitter = 2; /* default */ in init_e1_port_hw()
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| /linux-4.1.27/Documentation/pps/ |
| D | pps.txt | 73 you should take into account the latencies and jitter introduced by
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| /linux-4.1.27/include/linux/ |
| D | compat.h | 115 compat_long_t jitter; member
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| /linux-4.1.27/arch/alpha/kernel/ |
| D | osf_sys.c | 1256 long jitter; /* pps jitter (us) (ro) */ member
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| /linux-4.1.27/drivers/input/tablet/ |
| D | aiptek.c | 1294 static DEVICE_ATTR(jitter,
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| /linux-4.1.27/Documentation/input/ |
| D | joystick.txt | 123 joystick is in the center position. They should not jitter by themselves to
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| /linux-4.1.27/init/ |
| D | Kconfig | 725 Use this option to reduce OS jitter for aggressive HPC or
740 Say Y here if you want to help to debug reduced OS jitter.
787 "rcuo" are bound to "housekeeping" CPUs, this reduces OS jitter
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| /linux-4.1.27/Documentation/video4linux/ |
| D | vivid.txt | 263 available. The jitter will be around 1 jiffie (that depends on the HZ
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