01-26-2015
BASH Execution Delay / Speedup
What the job does is take that line of the file that it's given as an argument and uses that to make seven or eight data accesses. Right now they're stubs, but in the future, they'll be accessing some hardware that may take awhile. Hence, spawning the job to run in background.
At first, I thought that running over 200 of these jobs as bogging down the machine. So I reduced the number, and reduced and reduced until I had a single job that made some accesses and exited. Still a huge delay at the end of the loop. But there's no testing there -- it's just supposed to return and run the loop again. The test for the line number in the file is in the inner loop. The outer loop continues reading a new copy of the external file *inside* the loop, not where the slowdown is occurring. Not knowing exactly what BASH is doing internally, I don't know what's going on at the head and footer of the loop. But it occasionally slows down a LOT.
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LEARN ABOUT DEBIAN
voice_set_playmode
voice_set_playmode(3alleg4) Allegro manual voice_set_playmode(3alleg4)
NAME
voice_set_playmode - Adjusts the loop status of the specified voice. Allegro game programming library.
SYNOPSIS
#include <allegro.h>
void voice_set_playmode(int voice, int playmode);
DESCRIPTION
Adjusts the loop status of the specified voice. This can be done while the voice is playing, so you can start a sample in looped mode (hav-
ing set the loop start and end positions to the appropriate values), and then clear the loop flag when you want to end the sound, which
will cause it to continue past the loop end, play the subsequent part of the sample, and finish in the normal way. The mode parameter is a
bitfield containing the following values:
PLAYMODE_PLAY
Plays the sample a single time. This is the default if you don't set the loop flag.
PLAYMODE_LOOP
Loops repeatedly through the sample, jumping back to the loop start position upon reaching the loop end.
PLAYMODE_FORWARD
Plays the sample from beginning to end. This is the default if you don't set the backward flag.
PLAYMODE_BACKWARD
Reverses the direction of the sample. If you combine this with the loop flag, the sample jumps to the loop end position upon reaching the
loop start (ie. you do not need to reverse the loop start and end values when you play the sample in reverse).
PLAYMODE_BIDIR
When used in combination with the loop flag, causes the sample to change direction each time it reaches one of the loop points, so it
alternates between playing forwards and in reverse.
SEE ALSO
Allegro version 4.4.2 voice_set_playmode(3alleg4)