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/Linux-v5.4/Documentation/sound/designs/
Dtimestamping.rst7 - 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-v5.4/tools/perf/scripts/python/
Dstat-cpi.py10 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-v5.4/drivers/gpu/drm/amd/display/modules/stats/
Dstats.c85 struct stats_time_cache *time; member
144 core_stats->time = kcalloc(core_stats->entries, in mod_stats_create()
148 if (core_stats->time == NULL) in mod_stats_create()
175 kfree(core_stats->time); in mod_stats_create()
189 kfree(core_stats->time); in mod_stats_destroy()
200 struct stats_time_cache *time = NULL; in mod_stats_dump() local
213 time = core_stats->time; in mod_stats_dump()
240 i == time[time_index].entry_id) { in mod_stats_dump()
245 time[time_index].render_time_in_us, in mod_stats_dump()
246 time[time_index].avg_render_time_in_us_last_ten, in mod_stats_dump()
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/Linux-v5.4/include/linux/platform_data/
Dgpmc-omap.h15 /* 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-v5.4/fs/ntfs/
Dtime.h3 * time.h - NTFS time conversion functions. Part of the Linux-NTFS project.
11 #include <linux/time.h> /* For current_kernel_time(). */
19 * utc2ntfs - convert Linux UTC time to NTFS time
20 * @ts: Linux UTC time to convert to NTFS time
22 * Convert the Linux UTC time @ts to its corresponding NTFS time and return
25 * Linux stores time in a struct timespec64 consisting of a time64_t tv_sec
30 * NTFS uses Microsoft's standard time format which is stored in a s64 and is
38 * converted to 100ns intervals, and then add the NTFS time offset. in utc2ntfs()
45 * get_current_ntfs_time - get the current time in little endian NTFS format
47 * Get the current time from the Linux kernel, convert it to its corresponding
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/Linux-v5.4/drivers/rtc/
Drtc-mc146818-lib.c25 unsigned int mc146818_get_time(struct rtc_time *time) in mc146818_get_time() argument
42 * Once the read clears, read the RTC time (again via ioctl). Easy. in mc146818_get_time()
54 time->tm_sec = CMOS_READ(RTC_SECONDS); in mc146818_get_time()
55 time->tm_min = CMOS_READ(RTC_MINUTES); in mc146818_get_time()
56 time->tm_hour = CMOS_READ(RTC_HOURS); in mc146818_get_time()
57 time->tm_mday = CMOS_READ(RTC_DAY_OF_MONTH); in mc146818_get_time()
58 time->tm_mon = CMOS_READ(RTC_MONTH); in mc146818_get_time()
59 time->tm_year = CMOS_READ(RTC_YEAR); in mc146818_get_time()
73 time->tm_sec = bcd2bin(time->tm_sec); in mc146818_get_time()
74 time->tm_min = bcd2bin(time->tm_min); in mc146818_get_time()
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Drtc-wm8350.c3 * 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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Drtc-pcf50633.c51 u_int8_t time[PCF50633_TI_EXTENT]; member
64 rtc->tm_sec = bcd2bin(pcf->time[PCF50633_TI_SEC]); in pcf2rtc_time()
65 rtc->tm_min = bcd2bin(pcf->time[PCF50633_TI_MIN]); in pcf2rtc_time()
66 rtc->tm_hour = bcd2bin(pcf->time[PCF50633_TI_HOUR]); in pcf2rtc_time()
67 rtc->tm_wday = bcd2bin(pcf->time[PCF50633_TI_WKDAY]); in pcf2rtc_time()
68 rtc->tm_mday = bcd2bin(pcf->time[PCF50633_TI_DAY]); in pcf2rtc_time()
69 rtc->tm_mon = bcd2bin(pcf->time[PCF50633_TI_MONTH]) - 1; in pcf2rtc_time()
70 rtc->tm_year = bcd2bin(pcf->time[PCF50633_TI_YEAR]) + 100; in pcf2rtc_time()
75 pcf->time[PCF50633_TI_SEC] = bin2bcd(rtc->tm_sec); in rtc2pcf_time()
76 pcf->time[PCF50633_TI_MIN] = bin2bcd(rtc->tm_min); in rtc2pcf_time()
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Drtc-spear.c66 /* date reg equal to time reg, for debug only */
195 * spear_rtc_read_time - set the time
197 * @tm: holds date and time
199 * This function read time and date. On success it will return 0
205 unsigned int time, date; in spear_rtc_read_time() local
210 time = readl(config->ioaddr + TIME_REG); in spear_rtc_read_time()
212 tm->tm_sec = (time >> SECOND_SHIFT) & SECOND_MASK; in spear_rtc_read_time()
213 tm->tm_min = (time >> MINUTE_SHIFT) & MIN_MASK; in spear_rtc_read_time()
214 tm->tm_hour = (time >> HOUR_SHIFT) & HOUR_MASK; in spear_rtc_read_time()
224 * spear_rtc_set_time - set the time
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Drtc-dm355evm.c35 union evm_time time; in dm355evm_rtc_read_time() local
48 if (tries && time.bytes[0] == status) in dm355evm_rtc_read_time()
50 time.bytes[0] = status; in dm355evm_rtc_read_time()
55 if (tries && time.bytes[1] == status) in dm355evm_rtc_read_time()
57 time.bytes[1] = status; in dm355evm_rtc_read_time()
62 if (tries && time.bytes[2] == status) in dm355evm_rtc_read_time()
64 time.bytes[2] = status; in dm355evm_rtc_read_time()
69 if (tries && time.bytes[3] == status) in dm355evm_rtc_read_time()
71 time.bytes[3] = status; in dm355evm_rtc_read_time()
75 dev_dbg(dev, "read timestamp %08x\n", time.value); in dm355evm_rtc_read_time()
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Drtc-rk808.c22 /* RK808 has a shadowed register for saving a "frozen" RTC time.
23 * When user setting "GET_TIME" to 1, the time will save in this shadowed
24 * register. If set "READSEL" to 1, user read rtc time register, actually
25 * get the time of that moment. If we need the real time, clr this bit.
77 time64_t time = rtc_tm_to_time64(tm); in rockchip_to_gregorian() local
78 rtc_time64_to_tm(time + nov2dec_transitions(tm) * 86400, tm); in rockchip_to_gregorian()
84 time64_t time = rtc_tm_to_time64(tm); in gregorian_to_rockchip() local
85 rtc_time64_to_tm(time - extra_days * 86400, tm); in gregorian_to_rockchip()
92 rtc_time64_to_tm(time - (extra_days - 1) * 86400, tm); in gregorian_to_rockchip()
96 /* Read current time and date in RTC */
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Drtc-cros-ec.c50 command == EC_CMD_RTC_GET_VALUE ? "time" : "alarm", in cros_ec_rtc_get()
55 *response = msg.data.time; in cros_ec_rtc_get()
72 msg.data.time = param; in cros_ec_rtc_set()
77 command == EC_CMD_RTC_SET_VALUE ? "time" : "alarm", in cros_ec_rtc_set()
85 /* Read the current time from the EC. */
91 u32 time; in cros_ec_rtc_read_time() local
93 ret = cros_ec_rtc_get(cros_ec, EC_CMD_RTC_GET_VALUE, &time); in cros_ec_rtc_read_time()
95 dev_err(dev, "error getting time: %d\n", ret); in cros_ec_rtc_read_time()
99 rtc_time64_to_tm(time, tm); in cros_ec_rtc_read_time()
104 /* Set the current EC time. */
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/Linux-v5.4/scripts/
Dshow_delta5 # 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 = string.atof(time_str)
52 #print "time=", time
53 return (time, rest)
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/Linux-v5.4/sound/core/seq/
Dseq_prioq.c7 #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-v5.4/Documentation/devicetree/bindings/rtc/
Dtrivial-rtc.yaml23 # 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
29 # Dallas DS1672 Real-time Clock
33 # I2C-BUS INTERFACE REAL TIME CLOCK MODULE
35 # I2C-BUS INTERFACE REAL TIME CLOCK MODULE with Battery Backed RAM
37 # I2C-BUS INTERFACE REAL TIME CLOCK MODULE
43 # Intersil ISL12022 Real-time Clock
45 # Real Time Clock Module with I2C-Bus
47 # Real Time Clock Module with I2C-Bus
49 # Real Time Clock
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/Linux-v5.4/lib/
Dfind_bit_benchmark.c39 ktime_t time; in test_find_first_bit() local
41 time = ktime_get(); in test_find_first_bit()
46 time = ktime_get() - time; in test_find_first_bit()
47 pr_err("find_first_bit: %18llu ns, %6ld iterations\n", time, cnt); in test_find_first_bit()
55 ktime_t time; in test_find_next_bit() local
57 time = ktime_get(); in test_find_next_bit()
60 time = ktime_get() - time; in test_find_next_bit()
61 pr_err("find_next_bit: %18llu ns, %6ld iterations\n", time, cnt); in test_find_next_bit()
69 ktime_t time; in test_find_next_zero_bit() local
71 time = ktime_get(); in test_find_next_zero_bit()
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/Linux-v5.4/drivers/gpu/drm/nouveau/nvkm/core/
Dsubdev.c114 s64 time; in nvkm_subdev_fini() local
117 time = ktime_to_us(ktime_get()); in nvkm_subdev_fini()
130 time = ktime_to_us(ktime_get()) - time; in nvkm_subdev_fini()
131 nvkm_trace(subdev, "%s completed in %lldus\n", action, time); in nvkm_subdev_fini()
138 s64 time; in nvkm_subdev_preinit() local
141 time = ktime_to_us(ktime_get()); in nvkm_subdev_preinit()
151 time = ktime_to_us(ktime_get()) - time; in nvkm_subdev_preinit()
152 nvkm_trace(subdev, "preinit completed in %lldus\n", time); in nvkm_subdev_preinit()
159 s64 time; in nvkm_subdev_init() local
163 time = ktime_to_us(ktime_get()); in nvkm_subdev_init()
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/Linux-v5.4/Documentation/fb/
Dviafb.modes21 # 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-v5.4/Documentation/scheduler/
Dsched-rt-group.rst2 Real-Time group scheduling
28 resolution, or the time it takes to handle the budget refresh itself.
33 are real-time processes).
43 the amount of bandwidth (eg. CPU time) being constant. In order to schedule
45 of the CPU time available. Without a minimum guarantee a realtime 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 realtime group which
56 Any time not allocated to a realtime group will be used to run normal priority
57 tasks (SCHED_OTHER). Any allocated run time not used will also be picked up by
63 time dedicated for the graphics. We can then give this group a run time of 0.8
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Dsched-deadline.rst12 3. Scheduling Real-Time Tasks
54 "runtime" microseconds of execution time every "period" microseconds, and
57 every time the task wakes up, the scheduler computes a "scheduling deadline"
61 task actually receives "runtime" time units within "deadline" if a proper
70 with the "traditional" real-time task model (see Section 3) can effectively
87 scheduling deadline - current time period
89 then, if the scheduling deadline is smaller than the current time, or
93 scheduling deadline = current time + deadline
99 - When a SCHED_DEADLINE task executes for an amount of time t, its
108 said to be "throttled" (also known as "depleted" in real-time literature)
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/Linux-v5.4/kernel/sched/
Dcputime.c10 * There are no locks covering percpu hardirq/softirq time.
14 * This may result in other CPU reading this CPU's irq time and can
16 * or new value with a side effect of accounting a slice of irq time to wrong
64 * We do not account for softirq time from ksoftirqd here. in irqtime_account_irq()
65 * We want to continue accounting softirq time to ksoftirqd thread in irqtime_account_irq()
67 * that do not consume any time, but still wants to run. in irqtime_account_irq()
113 * Account user CPU time to a process.
114 * @p: the process that the CPU time gets accounted to
115 * @cputime: the CPU time spent in user space since the last update
121 /* Add user time to process. */ in account_user_time()
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/Linux-v5.4/drivers/net/wireless/intel/iwlwifi/fw/api/
Dtime-event.h70 /* Time Event types, according to MAC type */
103 /* Time event - defines for command API v1 */
106 * @TE_V1_FRAG_NONE: fragmentation of the time event is NOT allowed.
107 * @TE_V1_FRAG_SINGLE: fragmentation of the time event is allowed, but only
109 * @TE_V1_FRAG_DUAL: fragmentation of the time event is allowed, but only
111 * @TE_V1_FRAG_ENDLESS: fragmentation of the time event is allowed, and any
125 /* If a Time Event can be fragmented, this is the max number of fragments */
127 /* Repeat the time event endlessly (until removed) */
129 /* If a Time Event has bounded repetitions, this is the maximal value */
132 /* Time Event dependencies: none, on another TE, or in a specific time */
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/Linux-v5.4/Documentation/devicetree/bindings/memory-controllers/
Domap-gpmc.txt58 - gpmc,cs-on-ns: Assertion time
59 - gpmc,cs-rd-off-ns: Read deassertion time
60 - gpmc,cs-wr-off-ns: Write deassertion time
63 - gpmc,adv-on-ns: Assertion time
64 - gpmc,adv-rd-off-ns: Read deassertion time
65 - gpmc,adv-wr-off-ns: Write deassertion time
66 - gpmc,adv-aad-mux-on-ns: Assertion time for AAD
67 - gpmc,adv-aad-mux-rd-off-ns: Read deassertion time for AAD
68 - gpmc,adv-aad-mux-wr-off-ns: Write deassertion time for AAD
71 - gpmc,we-on-ns Assertion time
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/Linux-v5.4/tools/testing/selftests/rtc/
Drtctest.c3 * Real Time Clock Driver Test Program
14 #include <sys/time.h>
16 #include <time.h>
43 /* Read the RTC time/date */ in TEST_F()
47 TH_LOG("Current RTC date/time is %02d/%02d/%02d %02d:%02d:%02d.", in TEST_F()
136 TH_LOG("Alarm time now set to %02d:%02d:%02d.", in TEST_F()
174 rc = ioctl(self->fd, RTC_RD_TIME, &alarm.time); in TEST_F()
177 secs = timegm((struct tm *)&alarm.time) + ALARM_DELTA; in TEST_F()
178 gmtime_r(&secs, (struct tm *)&alarm.time); in TEST_F()
192 TH_LOG("Alarm time now set to %02d/%02d/%02d %02d:%02d:%02d.", in TEST_F()
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/Linux-v5.4/drivers/net/wireless/intel/iwlwifi/mvm/
Dtime-event.h69 * DOC: Time Events - what is it?
71 * Time Events are a fw feature that allows the driver to control the presence
73 * concurrently, the fw may choose to jump to another channel at any time.
74 * In order to make sure that the fw is on a specific channel at a certain time
75 * and for a certain duration, the driver needs to issue a time event.
77 * The simplest example is for BSS association. The driver issues a time event,
87 * time and for a certain duration, it sends a Time Event. The flow against the
97 * What is the start time of the event?
98 * Is there an end-time for the event?
108 * In order to simplify the use of time events to the rest of the driver,
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