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reduce the amount of reallocs by making the vector size generation 

dependent on tstep and tstop for tran or pss simulation
This commit is contained in:
Holger Vogt 2018-11-18 01:07:22 +01:00
parent 9fb2aac952
commit 9a1b9dc2e6
1 changed files with 25 additions and 13 deletions
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38
src/frontend/outitf.c
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@ -1060,7 +1060,7 @@ plotInit(runDesc *run)
} }
} }
/* prepare the vector length data for memory allocation */
static inline int static inline int
vlength2delta(int l) vlength2delta(int l)
{ {
@ -1069,18 +1069,30 @@ vlength2delta(int l)
/* We need just a vector length of 1 */ /* We need just a vector length of 1 */
return 1; return 1;
#endif #endif
static int newpoints;
if (l < 50000) static int newpoints2;
return 512; int points = ft_curckt->ci_ckt->CKTtimeListSize;
if (l < 200000) /* transient and pss analysis (points > 0) upon start */
return 256; if (l == 0 && points > 0) {
if (l < 500000) /* number of timesteps plus some overhead */
return 128; newpoints = points + 100;
/* larger memory allocations may exhaust memory easily return newpoints;
* this function may use better estimation depending on }
* available memory and number of vectors (run->numData) /* transient and pss if original estimate is exceeded */
*/ else if (l == newpoints && points > 0)
return 64; {
/* check where we are */
double timerel = ft_curckt->ci_ckt->CKTtime / ft_curckt->ci_ckt->CKTfinalTime;
/* return an estimate of the appropriate number of time points */
newpoints2 = (int)(points / timerel) - points + 1;
return newpoints2;
}
/* the estimate is (hopefully only slightly) too small, so add 2% of points */
else if (points > 0)
return (int)(newpoints2 / 50) + 1;
/* other analysis types that do not set CKTtimeListSize */
else
return 1024;
} }