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Overview
| Comment: | timerate: added dynamic factor by threshold calculation (avoid growing of the execution time if iterations are not consistent, e. g. wax continuously on time) |
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| Downloads: | Tarball | ZIP archive |
| Timelines: | family | ancestors | descendants | both | sebres-8-6-timerate |
| Files: | files | file ages | folders |
| SHA3-256: |
8ad25ef9ebc8e989cdbaf7a4d8f6d0ca |
| User & Date: | sebres 2019-02-07 21:20:52.246 |
References
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2019-02-12
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| 19:35 | cherrypick [8ad25ef9eb] from 8.6 - timerate: added dynamic factor by threshold calculation (avoid gr... check-in: fd80b4356e user: sergey.brester tags: sebres-8-5-timerate | |
Context
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2019-02-13
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| 02:57 | merge 8-5-timerate (?max-count?, break possibility, diverse fixes) + windows time-calibration cycle ... check-in: 2f5413a0fb user: sebres tags: sebres-8-6-timerate | |
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2019-02-12
| ||
| 19:35 | cherrypick [8ad25ef9eb] from 8.6 - timerate: added dynamic factor by threshold calculation (avoid gr... check-in: fd80b4356e user: sergey.brester tags: sebres-8-5-timerate | |
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2019-02-07
| ||
| 21:20 | timerate: added dynamic factor by threshold calculation (avoid growing of the execution time if iter... check-in: 8ad25ef9eb user: sebres tags: sebres-8-6-timerate | |
| 15:45 | merge 8.6(.9), conflicts resolved check-in: f29f1e9566 user: sergey.brester tags: sebres-8-6-timerate | |
Changes
Changes to generic/tclCmdMZ.c.
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{
static
double measureOverhead = 0; /* global measure-overhead */
double overhead = -1; /* given measure-overhead */
register Tcl_Obj *objPtr;
register int result, i;
Tcl_Obj *calibrate = NULL, *direct = NULL;
| | | | > > | 4294 4295 4296 4297 4298 4299 4300 4301 4302 4303 4304 4305 4306 4307 4308 4309 4310 4311 4312 4313 4314 4315 4316 |
{
static
double measureOverhead = 0; /* global measure-overhead */
double overhead = -1; /* given measure-overhead */
register Tcl_Obj *objPtr;
register int result, i;
Tcl_Obj *calibrate = NULL, *direct = NULL;
Tcl_WideUInt count = 0; /* Holds repetition count */
Tcl_WideInt maxms = -0x7FFFFFFFFFFFFFFFL;
/* Maximal running time (in milliseconds) */
Tcl_WideUInt threshold = 1; /* Current threshold for check time (faster
* repeat count without time check) */
Tcl_WideUInt maxIterTm = 1; /* Max time of some iteration as max threshold
* additionally avoid divide to zero (never < 1) */
unsigned short factor = 50; /* Factor (4..50) limiting threshold to avoid
* growth of execution time. */
register Tcl_WideInt start, middle, stop;
#ifndef TCL_WIDE_CLICKS
Tcl_Time now;
#endif
static const char *const options[] = {
"-direct", "-overhead", "-calibrate", "--", NULL
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Tcl_GetTime(&now);
middle = now.sec; middle *= 1000000; middle += now.usec;
#endif
if (middle >= stop) {
break;
}
| | | > > > > > | > > > > > > > > | > > | | 4498 4499 4500 4501 4502 4503 4504 4505 4506 4507 4508 4509 4510 4511 4512 4513 4514 4515 4516 4517 4518 4519 4520 4521 4522 4523 4524 4525 4526 4527 4528 4529 4530 4531 4532 4533 4534 4535 4536 4537 4538 4539 |
Tcl_GetTime(&now);
middle = now.sec; middle *= 1000000; middle += now.usec;
#endif
if (middle >= stop) {
break;
}
/* don't calculate threshold by few iterations, because sometimes first
* iteration(s) can be too fast or slow (cached, delayed clean up, etc) */
if (count < 10) {
threshold = 1; continue;
}
/* average iteration time in microsecs */
threshold = (middle - start) / count;
if (threshold > maxIterTm) {
maxIterTm = threshold;
/* interations seems to be longer */
if (threshold > (maxIterTm * 2)) {
if ((factor *= 2) > 50) factor = 50;
} else {
if (factor < 50) factor++;
}
} else if (factor > 4) {
/* interations seems to be shorter */
if (threshold < (maxIterTm / 2)) {
if ((factor /= 2) < 4) factor = 4;
} else {
factor--;
}
}
/* as relation between remaining time and time since last check,
* maximal some % of time (by factor), so avoid growing of the execution time
* if iterations are not consistent, e. g. wax continuously on time) */
threshold = ((stop - middle) / maxIterTm) / factor + 1;
if (threshold > 100000) { /* fix for too large threshold */
threshold = 100000;
}
}
{
Tcl_Obj *objarr[8], **objs = objarr;
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