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Clocks_calc_mult_shift

WebMay 4, 2016 · The call to clocks_calc_mult_shift () at the bottom would need to be modified so that the timer is programmed properly. For more accuracy, you can disable dynamic frequency scaling for the memory controller (if it is enabled). I don’t know how to disable that. Then use the BUS_CYCLES performance counter event as a time base. … Web* Re: Export clocks_calc_mult_shift() function 2016-03-08 22:25 Export clocks_calc_mult_shift() function Murali Karicheri @ 2016-03-08 22:53 ` John Stultz …

[PATCH v12 clocksource 4/5] clocksource: Reduce clocksource …

Web* NOTE: This function includes a safety margin of 50%, so that bad clock values * can be detected. */-u64 clocks_calc_max_nsecs(u32 mult, u32 shift, u32 maxadj, u64 mask) +u64 clocks_calc_max_nsecs(u32 mult, u32 shift, u32 maxadj, u64 mask, u64 *max_cyc) {u64 max_nsecs, max_cycles; @@ -493,6 +495,10 @@ u64 … Web+ clocks_calc_mult_shift(&cc->mult, &cc->shift, cs_ts_freq, + NSEC_PER_SEC, maxsec); +static void i915_perf_init_timecounter(struct i915_perf_stream *stream) +#define SYSTIME_START_OFFSET 350000 /* Counter read takes about 350us */ + … tina weisman https://xhotic.com

clocksource, to be used to calculate the suspend time. - LKML.ORG

Webclocks_calc_max_nsecs (u32 mult, u32 shift, u32 maxadj, u64 mask, u64 *max_cycles); extern void: clocks_calc_mult_shift (u32 *mult, u32 *shift, u32 from, u32 to, u32 … WebDefined in 1 files as a function: kernel/time/clocksource.c, line 47 (as a function) WebLKML Archive on lore.kernel.org help / color / mirror / Atom feed * [PATCH v4 00/17] 64-bit friendly generic sched_clock() @ 2013-07-18 23:21 Stephen Boyd 2013-07-18 23:21 ` [PATCH v4 01/17] clocksource: Extract max nsec calculation into separate function Stephen Boyd ` (20 more replies) 0 siblings, 21 replies; 51+ messages in thread From: Stephen … party city white gloves

[v3] ARM: sched_clock: allow sched_clock to be selected at runtime

Category:[v2] ARM: sched_clock: allow sched_clock to be selected at runtime

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Clocks_calc_mult_shift

How to wait 1 second. Interface with timers. - Jetson TX1

WebLKML Archive on lore.kernel.org help / color / mirror / Atom feed * [PATCH] clocksource: use clocksource_freq2mult() helper @ 2016-03-16 10:21 Alexander Kuleshov 2016-04-07 22:28 ` John Stultz 2016-04-08 4:55 ` John Stultz 0 siblings, 2 replies; 3+ messages in thread From: Alexander Kuleshov @ 2016-03-16 10:21 UTC (permalink / raw) To: John Stultz, … Webclocks_calc_mult_shift (u32 *mult, u32 *shift, u32 from, u32 to, u32 maxsec) { u64 tmp; u32 sft, sftacc= 32; //shift accumulator /* * Calculate the shift factor which is limiting the conversion * range: * 计算mask (clocksource.mask)能被左移的最大位数，从而也决定了mult的大小，即cycles * mult <= mask，这样不会发生溢出， * 这里可以看出最大的left …

Clocks_calc_mult_shift

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WebWe need to calculate the same number in the clocksource code and the sched_clock code, so extract this code into its own function. We also drop the min_t and just use min() because the two types are the same. WebOn MIPS, with maxsec=4, clocks_calc_mult_shift () may generate a very big mult, which may easily cause timekeeper.mult overflow within timekeeping jobs. e.g. when clock …

Webclocks_calc_mult_shift(&cs->mult, &cs->shift, freq, NSEC_PER_SEC / scale, sec * scale);} + + /* + * If the uncertainty margin is not specified, calculate it. + * If both scale and freq are non-zero, calculate the clock + * period, but bound below at 2*WATCHDOG_MAX_SKEW. However, + * if either of scale or freq is zero, be very … Web/* Calculate the mult/shift to convert counter ticks to ns. */ clocks_calc_mult_shift (&new_mult, &new_shift, rate, NSEC_PER_SEC, 3600); new_mask = …

WebUse this calculator to add up your work week time sheet and calculate work hours for payroll. This online time clock uses a standard 12-hour work clock with am and pm or a 24-hour clock for military time. Calculate … WebFor some frequqencies, the clocks_calc_mult_shift() function will unfortunately select mult values very close to 0xffffffff. This has the potential to overflow when NTP adjusts the …

Webu32 shift, unsigned int *clock_set) {u64 interval = tk->cycle_interval << shift; tk->tkr_mono.cycle_last += interval; tk->tkr_mono.xtime_nsec += tk->xtime_interval << …

Web+ /* Calc the maximum number of seconds which we can run before + * wrapping around. + */ + maxsec = cpts->cc.mask; + do_div(maxsec, freq); + if (!maxsec) + maxsec = 1; + … party city westworth village fort worth txWebThe minsec argument to clocks_calc_mult_shift() is misnamed. It is used to clamp the magnitude of the mult factor so that a multiplication with any value in the given range … party city wheatonWeb+ clocks_calc_mult_shift(&mult, &shift, freq, NSEC_PER_SEC, maxsec); + cpts->cc_mult = mult; + cpts->cc.mult = mult; + cpts->cc.shift = shift; + /* Check calculations and inform if not precise */ Contrary to this comment, you are not making any kind of judgment about whether the calculations are precise or not. + frac = 0; party city white paper bagsWebclocks_calc_mult_shift(&cs->mult, &cs->shift, freq, NSEC_PER_SEC / scale, sec * scale);} + + /* + * If the uncertainty margin is not specified, calculate it. + * If both scale … tina weiss frenchtown njWebJul 19, 2024 · From: John Stultz <> Subject [PATCH 5/5] time: Introduce one suspend clocksource to compensate the suspend time: Date: Thu, 19 Jul 2024 17:38:47 -0700 tina weiss realtorWebName:locks_calc_mult_shift - calculate mult/shift factors for scaled math of clocks*@mult: pointer to mult variable*@shift: pointer to shift variable*@from: … tina weirather tom weiratherhttp://www.bricktou.com/kernel/time/clocksourceclocks_calc_mult_shift_en.html party city westworth