| /linux/Documentation/sound/designs/ |
| H A D | timestamping.rst | 7 - Trigger_tstamp is the system time snapshot taken when the .trigger
19 The difference (tstamp - trigger_tstamp) defines the elapsed time.
26 The use of these different pointers and time information depends on
30 - ``delay`` reports the time it will take to hear a new sample after all
34 along with a snapshot of system time. Applications can select from
42 of time as measured by different components of audio hardware. In
47 --------------------------------------------------------------> time
51 time time time time time
58 The analog time is taken at the last stage of the playback, as close
61 The link time is taken at the output of the SoC/chipset as the samples
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| /linux/Documentation/trace/rv/ |
| H A D | monitor_rtapp.rst | 1 Real-time application monitors
11 Real-time applications may have design flaws such that they experience
12 unexpected latency and fail to meet their time requirements. Often, these flaws
15 - Page faults: A real-time thread may access memory that does not have a
18 action. This causes significant delays to the real-time thread
19 - Priority inversion: A real-time thread blocks waiting for a lower-priority
20 thread. This causes the real-time thread to effectively take on the
21 scheduling priority of the lower-priority thread. For example, the real-time
23 non-pi-mutex, but the mutex is currently owned by a non-real-time thread.
26 reasons for unexpected latency with real-time applications. It is a container of
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| /linux/tools/perf/scripts/python/ |
| H A D | stat-cpi.py | 10 def get_key(time, event, cpu, thread): argument
11 return "%d-%s-%d-%d" % (time, event, cpu, thread)
13 def store_key(time, cpu, thread): argument
14 if (time not in times):
15 times.append(time)
23 def store(time, event, cpu, thread, val, ena, run): argument
24 #print("event %s cpu %d, thread %d, time %d, val %d, ena %d, run %d" %
25 # (event, cpu, thread, time, val, ena, run))
27 store_key(time, cpu, thread)
28 key = get_key(time, event, cpu, thread)
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| /linux/include/linux/platform_data/ |
| H A D | gpmc-omap.h | 15 /* bool type time settings */
35 u32 cs_on; /* Assertion time */
36 u32 cs_rd_off; /* Read deassertion time */
37 u32 cs_wr_off; /* Write deassertion time */
40 u32 adv_on; /* Assertion time */
41 u32 adv_rd_off; /* Read deassertion time */
42 u32 adv_wr_off; /* Write deassertion time */
43 u32 adv_aad_mux_on; /* ADV assertion time for AAD */
44 u32 adv_aad_mux_rd_off; /* ADV read deassertion time for AAD */
45 u32 adv_aad_mux_wr_off; /* ADV write deassertion time for AAD */
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| /linux/Documentation/devicetree/bindings/rtc/ |
| H A D | trivial-rtc.yaml | 23 # AB-RTCMC-32.768kHz-B5ZE-S3: Real Time Clock/Calendar Module with I2C Interface
25 # AB-RTCMC-32.768kHz-EOZ9: Real Time Clock/Calendar Module with I2C Interface
27 # ASPEED BMC ast2400 Real-time Clock
29 # ASPEED BMC ast2500 Real-time Clock
31 # ASPEED BMC ast2600 Real-time Clock
33 # Conexant Digicolor Real Time Clock Controller
37 # Dallas DS1672 Real-time Clock
41 # Dallas m41t00 Real-time Clock
43 # SD2405AL Real-Time Clock
47 # I2C-BUS INTERFACE REAL TIME CLOCK MODULE
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| /linux/drivers/rtc/ |
| H A D | rtc-mc146818-lib.c | 34 * readout is unspecified. The maximum update time is ~2ms. Poll in mc146818_avoid_UIP()
81 pr_warn("Reading current time from RTC took around %li ms\n", in mc146818_avoid_UIP()
101 struct rtc_time *time; member
121 p->time->tm_sec = seconds; in mc146818_get_time_callback()
122 p->time->tm_min = CMOS_READ(RTC_MINUTES); in mc146818_get_time_callback()
123 p->time->tm_hour = CMOS_READ(RTC_HOURS); in mc146818_get_time_callback()
124 p->time->tm_mday = CMOS_READ(RTC_DAY_OF_MONTH); in mc146818_get_time_callback()
125 p->time->tm_mon = CMOS_READ(RTC_MONTH); in mc146818_get_time_callback()
126 p->time->tm_year = CMOS_READ(RTC_YEAR); in mc146818_get_time_callback()
143 * mc146818_get_time - Get the current time from the RTC
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| H A D | rtc-wm8350.c | 3 * Real Time Clock driver for Wolfson Microelectronics WM8350
13 #include <linux/time.h>
29 * Read current time and date in RTC
38 * Read the time twice and compare. in wm8350_rtc_readtime()
39 * If time1 == time2, then time is valid else retry. in wm8350_rtc_readtime()
83 dev_err(dev, "timed out reading RTC time\n"); in wm8350_rtc_readtime()
88 * Set current time and date in RTC
93 u16 time[4]; in wm8350_rtc_settime() local
97 time[0] = tm->tm_sec; in wm8350_rtc_settime()
98 time[0] |= tm->tm_min << WM8350_RTC_MINS_SHIFT; in wm8350_rtc_settime()
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| H A D | rtc-spacemit-p1.c | 37 /* Number of attempts to read a consistent time stamp before giving up */
47 * latched to ensure a consistent time snapshot within the registers,
57 u8 time[6]; in p1_rtc_read_time() local
63 ret = regmap_bulk_read(regmap, RTC_TIME, time, sizeof(time)); in p1_rtc_read_time()
68 seconds = time[0]; in p1_rtc_read_time()
69 ret = regmap_bulk_read(regmap, RTC_TIME, time, sizeof(time)); in p1_rtc_read_time()
72 } while (time[0] != seconds && --count); in p1_rtc_read_time()
77 t->tm_sec = time[0] & GENMASK(5, 0); in p1_rtc_read_time()
78 t->tm_min = time[1] & GENMASK(5, 0); in p1_rtc_read_time()
79 t->tm_hour = time[2] & GENMASK(4, 0); in p1_rtc_read_time()
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| H A D | rtc-sd2405al.c | 3 * RTC driver for the SD2405AL Real-Time Clock
18 /* Real time clock registers */
87 static int sd2405al_read_time(struct device *dev, struct rtc_time *time) in sd2405al_read_time() argument
98 time->tm_sec = bcd2bin(data[SD2405AL_REG_T_SEC] & 0x7F); in sd2405al_read_time()
99 time->tm_min = bcd2bin(data[SD2405AL_REG_T_MIN] & 0x7F); in sd2405al_read_time()
102 time->tm_hour = bcd2bin(data[SD2405AL_REG_T_HOUR] & 0x3F); in sd2405al_read_time()
105 time->tm_hour = bcd2bin(data[SD2405AL_REG_T_HOUR] in sd2405al_read_time()
108 time->tm_hour = bcd2bin(data[SD2405AL_REG_T_HOUR] in sd2405al_read_time()
111 time->tm_wday = bcd2bin(data[SD2405AL_REG_T_WEEK] & 0x07); in sd2405al_read_time()
112 time->tm_mday = bcd2bin(data[SD2405AL_REG_T_DAY] & 0x3F); in sd2405al_read_time()
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| H A D | rtc-spear.c | 63 /* date reg equal to time reg, for debug only */
192 * spear_rtc_read_time - set the time
194 * @tm: holds date and time
196 * This function read time and date. On success it will return 0
202 unsigned int time, date; in spear_rtc_read_time() local
208 time = readl(config->ioaddr + TIME_REG); in spear_rtc_read_time()
210 } while (time == readl(config->ioaddr + TIME_REG)); in spear_rtc_read_time()
211 tm->tm_sec = (time >> SECOND_SHIFT) & SECOND_MASK; in spear_rtc_read_time()
212 tm->tm_min = (time >> MINUTE_SHIFT) & MIN_MASK; in spear_rtc_read_time()
213 tm->tm_hour = (time >> HOUR_SHIFT) & HOUR_MASK; in spear_rtc_read_time()
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| /linux/lib/ |
| H A D | find_bit_benchmark.c | 39 ktime_t time; in test_find_first_bit() local
43 time = ktime_get(); in test_find_first_bit()
48 time = ktime_get() - time; in test_find_first_bit()
49 pr_err("find_first_bit: %18llu ns, %6ld iterations\n", time, cnt); in test_find_first_bit()
59 ktime_t time; in test_find_first_and_bit()
63 time = ktime_get(); in test_find_first_and_bit()
68 time = ktime_get() - time; in test_find_first_and_bit()
69 pr_err("find_first_and_bit: %18llu ns, %6ld iterations\n", time, cn in test_find_first_and_bit()
56 ktime_t time; test_find_first_and_bit() local
74 ktime_t time; test_find_next_bit() local
88 ktime_t time; test_find_next_zero_bit() local
102 ktime_t time; test_find_last_bit() local
121 ktime_t time; test_find_nth_bit() local
138 ktime_t time; test_find_next_and_bit() local
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| /linux/sound/core/seq/ |
| H A D | seq_prioq.c | 7 #include <linux/time.h>
91 return (snd_seq_compare_tick_time(&a->time.tick, &b->time.tick)); in compare_timestamp()
93 /* compare real time */ in compare_timestamp()
94 return (snd_seq_compare_real_time(&a->time.time, &b->time.time)); in compare_timestamp()
108 if (a->time.tick > b->time.tick) in compare_timestamp_rel()
110 else if (a->time.tick == b->time.tick) in compare_timestamp_rel()
115 /* compare real time */ in compare_timestamp_rel()
116 if (a->time.time.tv_sec > b->time.time.tv_sec) in compare_timestamp_rel()
118 else if (a->time.time.tv_sec == b->time.time.tv_sec) { in compare_timestamp_rel()
119 if (a->time.time.tv_nsec > b->time.time.tv_nsec) in compare_timestamp_rel()
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| /linux/Documentation/scheduler/ |
| H A D | sched-rt-group.rst | 2 Real-Time group scheduling
28 resolution, or the time it takes to handle the budget refresh itself.
33 are real-time processes).
42 Real-time scheduling is all about determinism, a group has to be able to rely on
43 the amount of bandwidth (eg. CPU time) being constant. In order to schedule
44 multiple groups of real-time tasks, each group must be assigned a fixed portion
45 of the CPU time available. Without a minimum guarantee a real-time group can
52 CPU time is divided by means of specifying how much time can be spent running
53 in a given period. We allocate this "run time" for each real-time group which
54 the other real-time groups will not be permitted to use.
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| /linux/arch/um/kernel/ |
| H A D | time.c | 23 #include <linux/time-internal.h>
64 panic("time-travel: time goes backwards %lld -> %lld\n", in time_travel_set_time()
85 printk(KERN_INFO "time-travel: received broadcast 0x%llx\n", bc_message); in _time_travel_print_bc_msg()
149 msg->time & UM_TIMETRAVEL_START_ACK_ID); in time_travel_handle_message()
158 panic("time-travel external link is broken\n"); in time_travel_handle_message()
160 panic("invalid time-travel message - %d bytes\n", ret); in time_travel_handle_message()
164 WARN_ONCE(1, "time-travel: unexpected message %lld\n", in time_travel_handle_message()
170 time_travel_set_time(msg->time); in time_travel_handle_message()
184 _time_travel_ext_free_until = msg->time; in time_travel_handle_message()
187 bc_message = msg->time; in time_travel_handle_message()
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| /linux/scripts/ |
| H A D | show_delta | 5 # time data, and format with time deltas.
19 have time data prefixed because the CONFIG_PRINTK_TIME option is set, or
20 the kernel command line option "time" is specified. When run with no
21 options, the time information is converted to show the time delta between
23 are relative to a single (base) point in time.
27 -b <base> Specify a base for time references.
31 line) is used as the time reference.
50 time
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| /linux/drivers/iio/ |
| H A D | industrialio-gts-helper.c | 2 /* gain-time-scale conversion helpers for IIO light sensors
45 * gain_get_scale_fraction - get the gain or time based on scale and known one
50 * @scale: Linearized scale to compute the gain/time for.
51 * @known: Either integration time or gain depending on which one is known
52 * @unknown: Pointer to variable where the computed gain/time is stored
55 * Compute either gain or time based on scale and either the gain or time
115 * @gts: Gain time scale descriptor
121 * generated by HW-gain or integration time. It is up to caller to decide what
122 * part of the total gain is due to integration time and what due to HW-gain.
141 * @gts: Gain time scale descriptor
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| /linux/include/uapi/linux/ |
| H A D | um_timetravel.h | 10 * struct um_timetravel_msg - UM time travel message
37 * @time: time in nanoseconds
39 __u64 time; member
63 * enum um_timetravel_start_ack - ack-time mask for start message
78 * this usually doesn't carry any data in the 'time' field
86 * @UM_TIMETRAVEL_START: initialize the connection, the time
93 * @UM_TIMETRAVEL_REQUEST: request to run at the given time
101 * interrupts); the time field is ignored. The calendar must process
109 * @UM_TIMETRAVEL_GET: return the current time from the calendar in the
110 * ACK message, the time in the request message is ignored
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| /linux/Documentation/networking/ |
| H A D | xsk-tx-metadata.rst | 54 packet for transmission at a pre-determined time called launch time. The
55 value of launch time is indicated by ``launch_time`` field of
72 Launch Time
75 The value of the requested launch time should be based on the device's PTP
81 packet reordering, a packet with a launch time request will block other
86 In scenarios where the launch time offload feature is disabled, the device
87 driver is expected to disregard the launch time request. For correct
88 interpretation and meaningful operation, the launch time should never be
89 set to a value larger than the farthest programmable time in the future
91 launch time offload feature.
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| /linux/include/linux/ |
| H A D | timekeeping.h | 25 * ktime_get() family - read the current time in a multitude of ways.
27 * The default time reference is CLOCK_MONOTONIC, starting at
28 * boot time but not counting the time spent in suspend.
32 * To get the time in a different format, use the ones with
82 * ktime_get_real - get the real (wall-) time in ktime_t format
84 * Returns: real (wall) time in ktime_t format
97 * ktime_get_boottime - Get monotonic time since boot in ktime_t format
100 * time spent in suspend.
102 * Returns: monotonic time since boot in ktime_t format
115 * ktime_get_clocktai - Get the TAI time of day in ktime_t format
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| H A D | jiffies.h | 10 #include <linux/time.h>
64 /* TICK_USEC is the time between ticks in usec */
67 /* USER_TICK_USEC is the time between ticks in usec assuming fake USER_HZ */
113 * time_after - returns true if the time a is after time b.
121 * Return: %true is time a is after time b, otherwise %false.
128 * time_before - returns true if the time a is before time b.
132 * Return: %true is time
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| /linux/Documentation/fb/ |
| H A D | viafb.modes | 21 # Active Time 25.422 us 15.253 ms
23 # Blank Time 6.356 us 1.430 ms
46 # Active Time 20.317 us 12.800 ms
48 # Blank Time 6.349 us 0.533 ms
67 # Active Time 17.778 us 11.093 ms
69 # Blank Time 5.333 us 0.670 ms
88 # Active Time 14.827 us 9.430 ms
90 # Blank Time 4.819 us 0.570 ms
109 # Active Time 12.212 us 7.767 ms
111 # Blank Time 3.969 us 0.566 ms
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| /linux/tools/perf/Documentation/ |
| H A D | perf-data.txt | 34 Convert time to wall clock time.
43 --time::
44 Only convert samples within given time window: <start>,<stop>. Times
45 have the format seconds.nanoseconds. If start is not given (i.e. time
47 stop time is not given (i.e. time string is 'x.y,') then analysis goes
49 requires the argument to be quoted e.g. --time "1234.567,1234.789 1235,"
51 Also support time percent with multiple time ranges. Time string is
55 Select the second 10% time slice:
57 perf data convert --to-json out.json --time 10%/2
59 Select from 0% to 10% time slice:
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| /linux/tools/testing/selftests/tc-testing/tc-tests/actions/ |
| H A D | gate.json | 31 "name": "Add gate action with base-time",
47 …"cmdUnderTest": "$TC action add action gate base-time 200000000000ns sched-entry close 100000000ns…
50 "matchPattern": "action order [0-9]*: .*base-time 200s.*index 10 ref",
58 "name": "Add gate action with cycle-time",
74 …"cmdUnderTest": "$TC action add action gate cycle-time 200000000000ns sched-entry close 100000000n…
77 "matchPattern": "action order [0-9]*: .*cycle-time 200s.*index 1000 ref",
85 "name": "Add gate action with cycle-time-ext",
101 …"cmdUnderTest": "$TC action add action gate cycle-time-ext 20000000000ns sched-entry close 1000000…
104 "matchPattern": "action order [0-9]*: .*cycle-time-ext 20s.*index 1000 ref",
112 "name": "Replace gate base-time action",
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| /linux/drivers/gpu/drm/nouveau/nvkm/core/ |
| H A D | subdev.c | 58 s64 time; in nvkm_subdev_fini() local
73 time = ktime_to_us(ktime_get()); in nvkm_subdev_fini()
87 time = ktime_to_us(ktime_get()) - time; in nvkm_subdev_fini()
88 nvkm_trace(subdev, "%s completed in %lldus\n", action, time); in nvkm_subdev_fini()
95 s64 time; in nvkm_subdev_preinit() local
98 time = ktime_to_us(ktime_get()); in nvkm_subdev_preinit()
108 time = ktime_to_us(ktime_get()) - time; in nvkm_subdev_preinit()
109 nvkm_trace(subdev, "preinit completed in %lldus\n", time); in nvkm_subdev_preinit()
116 s64 time; in nvkm_subdev_oneinit_() local
122 nvkm_trace(subdev, "one-time init running...\n"); in nvkm_subdev_oneinit_()
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| /linux/Documentation/devicetree/bindings/memory-controllers/ |
| H A D | ti,gpmc-child.yaml | 30 description: Assertion time
34 description: Read deassertion time
38 description: Write deassertion time
43 description: Assertion time
47 description: Read deassertion time
51 description: Write deassertion time
55 description: Assertion time for AAD
59 description: Read deassertion time for AAD
63 description: Write deassertion time for AAD
68 description: Assertion time
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