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Performance improvement, now much lower "delta" are allowed. 

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@14439 27425a3e-05d8-49a3-a47f-9c15f0e5edd8
This commit is contained in:
Giovanni Di Sirio 2021-05-29 10:37:13 +00:00
parent ca2fde8996
commit 9d1810297e
1 changed files with 11 additions and 9 deletions
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20
os/rt/src/chvt.c
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@ -413,10 +413,6 @@ void chVTDoTickI(void) {
sysinterval_t delta, nowdelta;
systime_t now;
/* Delta between current time and last execution time.*/
now = chVTGetSystemTimeX();
nowdelta = chTimeDiffX(vtlp->lasttime, now);
/* Looping through timers consuming all timers with deltas lower or equal
than the interval between "now" and "lasttime".*/
while (true) {
@ -425,6 +421,10 @@ void chVTDoTickI(void) {
/* First timer in the delta list.*/
vtp = (virtual_timer_t *)vtlp->dlist.next;
/* Delta between current time and last execution time.*/
now = chVTGetSystemTimeX();
nowdelta = chTimeDiffX(vtlp->lasttime, now);
/* Loop break condition.
Note that the list scan is limited by the delta list header having
"vtlp->dlist.delta == (sysinterval_t)-1" which is greater than all
@ -456,17 +456,19 @@ void chVTDoTickI(void) {
vtp->func(vtp, vtp->par);
chSysLockFromISR();
/* Delta between current time after callback execution time.*/
now = chVTGetSystemTimeX();
nowdelta = chTimeDiffX(lasttime, now);
/* If a reload is defined the timer needs to be restarted.*/
if (vtp->reload > (sysinterval_t)0) {
sysinterval_t delay;
/* Refreshing the current time after spending time in the callback for
a more accurate detection of too fast reloads.*/
now = chVTGetSystemTimeX();
nowdelta = chTimeDiffX(lasttime, now);
chDbgAssert(nowdelta <= vtp->reload, "skipped deadline");
/* Enqueuing the timer again using the calculated delta.*/
sysinterval_t delay = vtp->reload - nowdelta;
delay = vtp->reload - nowdelta;
/* Special case where the timers list is empty.*/
if (ch_dlist_isempty(&vtlp->dlist)) {