On Tue, Nov 9, 2010 at 3:04 AM, Carsten Haitzler <ras...@rasterman.com> wrote:
> On Tue, 9 Nov 2010 14:29:23 +1000 David Seikel <onef...@gmail.com> said:
>
>> On Tue, 9 Nov 2010 11:52:04 +0900 Carsten Haitzler (The Rasterman)
>> <ras...@rasterman.com> wrote:
>>
>> > stupid goal to "get more fps" just for such benchmarks. there is no
>> > POINT going faster than the screen refresh. you lose frames. in real
>> > life you want no MORe frames per second than the animator framereate
>> > - regardless of "benchmarking". if you want a "benchmark mode" where
>> > all this frame limiting stuff is dropped and it just spins and draws
>> > as fast as it can - sure, but for an actual "use this in real life"
>> > library you want it to simply respect the animator framerate and not
>> > bypass it because someone has a benchmark bee in their bonnet.
>>
>> Inversely, you do want the time taken to calculate each frame to be as
>> small as possible, so that you have more time available for other
>
> correct - but thats a separate matter. benchmarking (ie getting as high an fps
> value as u can when running in a tight loop) is a way of doing this and seeing
> it get better (fps goes up). but its a benchmarking thing - not a "runtime
> real
> life use" thing. that effort to reduce time taken to produce a frame ends up
> keeping more cpu for other things indeed.
Small example that exposes the problem inside ecore:
A timer callback sleeps for 3 seconds, then add another timer and
returns FALSE. The new timer is added with an interval of 0.001
seconds, but is just called after another 3 seconds.
>From my point of view, the problem is in _ecore_timer_next_get(),
which should use ecore_time_get() instead of ecore_loop_time_get() to
get the current time. Actually, it should probably use
ecore_time_get() when the timer was added with ecore_timer_add(), and
use ecore_loop_time_get() when the timer in the "first" variable was
added with ecore_timer_loop_add().
What do you think?
--
Rafael Antognolli
ProFUSION embedded systems
http://profusion.mobi
#include <Ecore.h>
#include <stdio.h>
#include <unistd.h>
#define INTERVAL 0.001
static Ecore_Timer *_timer = NULL;
static Eina_Bool
_timer_cb(void *data)
{
fprintf(stderr, "p1\n");
sleep(3);
fprintf(stderr, "p2\n");
_timer = ecore_timer_add(INTERVAL, _timer_cb, NULL);
return EINA_FALSE;
}
int
main(int argc, const char *argv[])
{
ecore_init();
_timer = ecore_timer_add(INTERVAL, _timer_cb, NULL);
ecore_main_loop_begin();
ecore_shutdown();
}
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