sergiotarxz/nuttx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Fix how CPU load counts are adjusted so that the total always adds up to 100%

Browse Source
This commit is contained in:
Gregory Nutt 2014-02-27 11:16:15 -06:00
parent 7138e18efe
commit cb0d49047a
2 changed files with 12 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
ChangeLog
View File

@ -6673,4 +6673,7 @@
* arch/arm/src/sam34: The port to the SAM4E is code complete (2014-2-16). * arch/arm/src/sam34: The port to the SAM4E is code complete (2014-2-16).
* include/cxx: Fix some bad idempotence defintions in header files * include/cxx: Fix some bad idempotence defintions in header files
(2014-2-27). (2014-2-27).
* sched/sched_cpuload.c: Change calulation of the total count when the
time constant related delay elapsed. The total count is now always
guaranteed to add up to 100% (excepting only truncation errors)
(2014-2-27).

11
sched/sched_cpuload.c
View File

@ -121,16 +121,21 @@ void weak_function sched_process_cpuload(void)
if (++g_cpuload_total > (CONFIG_SCHED_CPULOAD_TIMECONSTANT * CLOCKS_PER_SEC)) if (++g_cpuload_total > (CONFIG_SCHED_CPULOAD_TIMECONSTANT * CLOCKS_PER_SEC))
{ {
/* Divide the tick count for every task by two */ uint32_t total = 0;
/* Divide the tick count for every task by two and recalculate the
* total.
*/
for (i = 0; i < CONFIG_MAX_TASKS; i++) for (i = 0; i < CONFIG_MAX_TASKS; i++)
{ {
g_pidhash[i].ticks >>= 1; g_pidhash[i].ticks >>= 1;
total += g_pidhash[i].ticks;
} }
/* Divide the total tick count by two */ /* Save the new total. */
g_cpuload_total >>= 1; g_cpuload_total = total;
} }
} }