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From: Epiphanov Sergei <serpiph@nikiet.ru>
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Subject: Re: [sisyphus] USB on 2.4.x
Date: Wed, 2 Feb 2005 17:47:14 +0300
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=F7 =D3=CF=CF=C2=DD=C5=CE=C9=C9 =CF=D4 2 =E6=C5=D7=D2=C1=CC=D8 2005 16:27=
 Anton Farygin =CE=C1=D0=C9=D3=C1=CC:
> =F0=D2=CF=C7=D2=C1=CD=CD=D5 =D7 =D3=D4=D5=C4=C9=C0 ;-)

=F7=CF=D4 =CF=CE=C1 (=D0=D2=C9=CC=CF=D6=C5=CE=C1).

--=20
=F3 =D5=D7=C1=D6=C5=CE=C9=C5=CD, =E5=D0=C9=C6=C1=CE=CF=D7 =F3=C5=D2=C7=C5=
=CA

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#include <string.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <signal.h>
#include <stdio.h>
#include <unistd.h>

struct timeval getTV;
struct timezone getTZ;
double prevValue=0.0, curValue=0.0;


void sigHand( int i ){
    gettimeofday( &getTV, &getTZ );
    prevValue = curValue;
    curValue = getTV.tv_sec+(double)getTV.tv_usec/1.0e6;
}

int main( int argc, char ** argv ) {

    ::setpriority( PRIO_PROCESS, 0, -19 );
    struct sigaction sa;
    memset( &sa, 0, sizeof(sa) );
    sa.sa_handler = sigHand;
    sigaction( SIGALRM, &sa, NULL );

    struct itimerval tv;
    tv.it_interval.tv_sec = 0;
    tv.it_interval.tv_usec = 30000;
    tv.it_value.tv_sec = 0;
    tv.it_value.tv_usec = 30000;
    setitimer( ITIMER_REAL, &tv, NULL );

    while( 1 ) {
        pause();
//	printf("%10.3f\n",curValue);
	printf("Cur=%16.6fs, Prev=%16.6fs, delta=%8.3fms\n",curValue,prevValue,(curValue-prevValue)*1.0e3);
    }
}

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