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Witam |
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|
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Czy ktos orientuje sie, jak mozna uzyskac opozninia wielkosci 1us (mikro |
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sekundy) w userspace? |
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|
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Na jadrach 2.4.x uzywalem do tego nanosleep(2), real-time z SCHED_FIFO i |
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dzialalo rewelacyjnie. Teraz mam jadro 2.6 i manual nanosleep podaje: |
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|
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" |
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Old behaviour |
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In order to support applications requiring much more precise pauses (e.g., |
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in order to control some time-critical hardware), nanosleep() would handle |
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pauses of up to 2 ms by busy waiting with microsecond precision when |
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called from a process scheduled under a real-time policy like SCHED_FIFO |
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or SCHED_RR. This special extension was removed in kernel 2.5.39, hence |
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is still present in current 2.4 kernels, but not in 2.6 kernels. |
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" |
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|
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Inne "standardowe" metody odczekiwania krotkich okresow czasu, tj. |
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select(NULL, NULL, NULL, &tv) i usleep() takze nie dzialaja. |
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|
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Bylbym wdzieczny za jakas podpowiedz, bo juz mi sie pomysly koncza... |
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|
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pozdrawiam, |
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Pawel |
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|
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-- |
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