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authorHans-Christoph Steiner <eighthave@users.sourceforge.net>2005-04-28 00:25:05 +0000
committerHans-Christoph Steiner <eighthave@users.sourceforge.net>2005-04-28 00:25:05 +0000
commit061e4be1f20ac78e3b52bc6429322d5fadcf5831 (patch)
treec6449d7cf4a19547b97d234ef4c65251ee766c1d /doc/pddp/help-timer.pd
parente30864640368dc4c25c309fb83365807955e832e (diff)
cleaned up a number of patches; renamed all to the standard -help.pd format; added some more ideas to the style guide; finished up lists_vs_anythings
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-#N canvas 11 8 937 643 10;
-#X msg 43 113 bang;
-#X msg 18 91 bang;
-#X obj 18 135 timer;
-#X obj 25 15 timer;
-#X floatatom 18 157 0 0 0;
-#X text 90 159 Output is in milliseconds;
-#X text 65 16 -- measure logical time;
-#X text 53 91 Click here to start or reset;
-#X text 13 44 The [timer] object measures elapsed logical time. Logical
-time moves forward as if all computation were instantaneous and as
-if all [delay] and [metro] objects were exact.;
-#X text 11 185 [timer] works like essentially like a stop-watch. Once
-it starts \, you can continue to "poll" the [timer] to view the elapsed
-time.;
-#X text 81 114 Click here to get elapsed logical time. Click again...and
-again...to see periodic measurements from the start or reset time.
-;
-#X text 10 282 As stated above \, [timer] measures "logical" time.
-This value may be slightly different that CPU time or "real" time.
-PD offers two objects which measure CPU time and "real" time. See the
-reference documents for those objects for more information.;
-#X obj 52 545 time_measurements;
-#X obj 52 441 bng 15 250 50 0 empty empty empty 0 -6 0 8 -262144 -1
--1;
-#X floatatom 17 572 0 0 0;
-#X floatatom 108 585 0 0 0;
-#X floatatom 175 573 0 0 0;
-#X text 11 358 In the example below \, I've created an abstraction
-which will force each of PD's stop-watches \, [timer] [cputime] and
-[realtime] to measure various processes and report the elapsed time.
-Click on each [bng] to begin the process and wait for the results.
-Notice the discrepancies in the results.;
-#X text 15 587 Logical Time;
-#X text 173 587 Real Time;
-#X text 107 601 CPU Time;
-#X obj 67 477 bng 15 250 50 0 empty empty empty 0 -6 0 8 -262144 -1
--1;
-#X text 72 435 1 Measures elapsed time between two "bangs" from a [trigger]
-object.;
-#X text 87 469 2 Measures the amount of time PD requires to turn on
-DSP and start an oscillator.;
-#X obj 445 484 bng 15 250 50 0 empty empty empty 0 -6 0 8 -262144 -1
--1;
-#X obj 445 17 bng 15 250 50 0 empty empty empty 0 -6 0 8 -262144 -1
--1;
-#X text 472 36 WHY THE DISCREPANCIES BETWEEN CLOCKS?;
-#X text 475 59 In a fantasy world \, computers could exist somehow
-beyond the restrictions of time and digital computation could be performed
-in ZERO time. However \, that is not the case. Instead \, every process
-within PD and within your operating system requires at least a few
-nanoseconds of your CPU's time.;
-#X obj 111 509 bng 15 250 50 0 empty empty empty 0 -6 0 8 -262144 -1
--1;
-#X text 476 144 The [timer] object is like a clock that is not constrained
-to the regular laws of physics and the universal space-time continuum.
-It reports "time" measurements as only PD can see them!;
-#X text 477 204 The [cputime] object is like a clock that measures
-how much time your CPU actually required to carry out your request.
-Keep in mind however that your CPU is busy doing many things simoultaneously
-\, so even though a process might take 5 minutes to complete \, your
-CPU does not pay full attention to that process for the entire 5 minutes.
-Instead \, it simply begins the process \, then refers back to that
-process from time to time until the it is complete. In other cases
-\, your CPU might require a full 5 minutes while PD might report that
-merely a few milliseconds have passed. This type of discrepancy depends
-heavily on your computer's hardware and the type of processing it is
-performing.;
-#X text 478 368 The [realtime] object is as much like your own wrist
-watch as PD can possibly manage. It measures time according to your
-operating system's internal clock.;
-#N canvas 0 0 454 304 related_objects_from_other_libraries 0;
-#X text 27 63 These objects are offered in PD only if you have downloaded
-and properly installed the appropriate library. These objects may or
-may not exist in a single library.;
-#X text 26 112 The best places to find information about PD's libraries
-is:;
-#X text 23 134 www.puredata.org and click on "Downloads" then "Software"
-;
-#X text 25 149 or;
-#X text 25 164 iem.kug.ac.at/pdb/;
-#X obj 44 24 t3_timer;
-#X text 469 589 This document was updated for PD version 0.35 test
-26 by Dave Sabine as part of a project called pddp proposed by Krzysztof
-Czaja to build comprehensive documentation for PD.;
-#X restore 505 476 pd related_objects_from_other_libraries;
-#X text 309 580 This document was updated for PD version 0.35 test
-28 by Dave Sabine as part of a project called pddp proposed by Krzysztof
-Czaja to build comprehensive documentation for PD.;
-#X text 11 232 The odd aspect about comparing [timer] to a stop-watch
-is that a stop-watch can be stopped! [timer] can only be started or
-reset. It cannot be stopped.;
-#X obj 625 445 metro;
-#X text 504 422 RELATED OBJECTS;
-#X obj 504 446 cputime;
-#X obj 562 445 realtime;
-#X text 132 501 3 Measures the amount of time PD requires count to
-three...please wait for approximately 3 seconds.;
-#X connect 0 0 2 1;
-#X connect 1 0 2 0;
-#X connect 2 0 4 0;
-#X connect 12 0 14 0;
-#X connect 12 1 15 0;
-#X connect 12 2 16 0;
-#X connect 13 0 12 0;
-#X connect 21 0 12 1;
-#X connect 25 0 24 0;
-#X connect 28 0 12 2;