Hi,
in my application i used more than one conference bridge with separate master_ports.
i have a "small" arm system? with a Linux 2.6? kernel .
if i have one connection everything is ok. (CPU use for the clock_thread < 3%)
if i have more than 3 connection with running clock threads, the last running clock_thread will use >90% cpu utilization.
the problem is the clock_thread sleep code in clock_thread.c
static int clock_thread(void *arg)
{
....
??? if (now.u64 < clock->next_tick.u64) {
??? ??? unsigned msec;
??? ??? msec = pj_elapsed_msec(&now, &clock->next_tick);
??? ??? pj_thread_sleep(msec);
??? }
...
}
if the if sleep statement will not reached the thread will not yield(). At this moment everything goes wrong. I think the linux scheduler will not left the thread without a yield and
will run this fuction to often.
The highest thread prio config for this thread will force this situation.
I make a small change and everything looks better:
?
?? if (now.u64 < clock->next_tick.u64) {
??? ??? unsigned msec;
??? ??? msec = pj_elapsed_msec(&now, &clock->next_tick);
??? ??? pj_thread_sleep(msec);
??? }
??? else
??? {
???? pj_thread_sleep(1); /** the linux scheduler will left this thread !!*/
?? }
Now i have a better situation, the six clock threads will use 40% together.
regards
?? Mark
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