Search DaniWeb - usleep

Does usleep consume CPU cycles? 4 Years Ago by Dani Someone posted a comment in the [php usleep manual](https://www.php.net/manual/en/function.usleep.php) that usleep() consumes CPU cycles whereas sleep() and time_nanosleep() do not. Is this true for PHP 7.x? Re: Does usleep consume CPU cycles? 4 Years Ago by rproffitt I am not an expert on this but recall a few things. First, implementation, version and host OS dependent so you can not make a blanket statement except there are cycles consumed in any sleep() I've seen in decades. Now are said cycles consumed in sleep() entirely? Back to implementation, OS etc. There are long priors here with lots of … LCD Control Module Program! 11 Years Ago by Strange&Evil … ) { if( attempts < max_send_attempts) { usleep(10000); // 100 ms attempts++; } else { return…bufsize) { if( attempt < max_read_attempt ) { usleep(1000); attempt++; } else { break; } } … pthread example program 13 Years Ago by spetro3387 …&count_cond_mutex); nCount = 0; } pthread_mutex_unlock(&count_cond_mutex); usleep(1000); //FOO - do work here or last running thread …&count_cond_mutex); nCount = 0; } pthread_mutex_unlock(&count_cond_mutex); usleep(1000); //FOO - do work here or last running thread … Error during compiling for C++ code 13 Years Ago by petero_l …1-r)); cout << total1 << endl; usleep(100000); if (k == t) { cout << …1)*d)); cout << total << endl; usleep(100000); if (n == x) { cout << …1-d)); cout << total << endl; usleep(100000); if (n == x) { cout << … help debug .... 2 processes not going 19 Years Ago by jaeSun … #%i is currently crossing the drawbridge.\n", northID); usleep(pausetime); //end CS //************************* //unlock bridge sem_post(&bridge_s… #%i is currently crossing the drawbridge.\n", southID); usleep(pausetime); //end CS //************************* //unlock bridge sem_post(&bridge_s… Guys, plese just one more time help me 14 Years Ago by dondajr … (!fbuffer) { //Dorme 1/10 de segundo usleep(1000); //Forca retorno ao loop continue; } … a dados no arquivo, dorme 1/10 de segundo usleep(1000); //Força inicio do loop continue; }… Process Scheduler problem in UNIX 13 Years Ago by lotrsimp12345 … repeat this multiple times. We are only supposed to use usleep in the jobgeneration() function. We are having trouble sleeping and…;linePowerUser<<endl; output<<lineUser; output.close(); usleep(50); } } void jobScheduler(){ int i = 0; int n = 0; int… Make an array from mysql results. Single column. 12 Years Ago by reco21 ….. [CODE]<?php $request = trim(strtolower($_REQUEST['login'])); //sleep(2); usleep(150000); $users = array('asdf', 'Peter', 'Peter2', 'George'); $valid = 'true'; foreach… like below.. [CODE] $request = trim(strtolower($_REQUEST['login'])); //sleep(2); usleep(150000); $users = array( ); $query = mysql_query("SELECT login FROM members… Re: Make an array from mysql results. Single column. 12 Years Ago by reco21 …) [CODE] <?php $request = trim(strtolower($_REQUEST['login'])); //sleep(2); usleep(150000); $users = array('asdf', 'Peter', 'Peter2', 'George'); $valid = 'true'; …('error'); $valid = 'true'; $request = trim(strtolower($_REQUEST['login'])); //sleep(2); usleep(150000); $users = array( ); $query = mysql_query("SELECT login FROM members… SEG FAULT when trying to close ofstream 11 Years Ago by sidvb1 … IO */ void Logger::DeleteInstance() { usleep(100000); pthread_mutex_lock(&mutex); run =… written++; //delete request; } } } pthread_mutex_unlock(&mutex); usleep(1000); } } /* * @param * @return * @… Re: slow down program output 10 Years Ago by Schol-R-LEA …want to know, how long are you setting `sleep()`. `usleep()`, and `nanosleep()` for, repsectively? While `sleep()` takes an… argument in seconds, `usleep()` takes one in microseconds, and `nanosleep()` (as the name…has frozen; OTOH, an argument of `99999` for `usleep()` (just under 1/10 of a second) would be… pass multiple inputs to proc_open pipe in php 3 Years Ago by Iikeloa … = ""; while($n < 3) { echo $commands[$n]; usleep(1000); fwrite($pipe[0], $commands[$n] . PHP_EOL ); fflush($pipe[0…]); usleep(1000); while($out = stream_get_contents($pipe[1]) && !feof($… Re: Delay 16 Years Ago by TkTkorrovi … time which scheduler gives to a program, is 5 milliseconds. usleep is defined in unistd.h, and implements delay in microseconds… none of these functions are part of the standard c, usleep and select are part of the POSIX standard, and g_usleep… Re: difficulty in providing delay in gcc compiler 15 Years Ago by Salem Well did you take account of the fact that usleep takes MICROSECONDS? delay(1000); and usleep(1000); will wait for different times. Re: Process Scheduler problem in UNIX 13 Years Ago by lotrsimp12345 … queues. The new jobs can be simple print and sleep/usleep operations. The job queues may be stored in an external… Re: Make an array from mysql results. Single column. 11 Years Ago by reco21 …;../dbcon.php"); $valid = 'true'; $request = trim(strtolower($_REQUEST['user'])); usleep(150000); $query = mysql_query("SELECT * FROM members WHERE user=\"… Re: slow down program output 10 Years Ago by COKEDUDE I looked at the man pages and saw those were the maximum values of usleep() and nanosleep(). With sleep I thought I would get a normal 5 seconds. I am working on a modified version of game of life. It is hard to see if it is doing what I want with how fast it is going. usleep(1000000); nanosleep(999999999); delay(3000); sleep(5); until help 17 Years Ago by jan1024188 … (a == b) printf("%d\n second ", a); a++; usleep ( 990000 ); printf("\n\n hvala ker usate ta pgr… Delay 16 Years Ago by tu_m.aimes Is there a delay function for C? I'm using usleep, but I just found that somewhere on the net and if I get asked about it, I won't be able to explain or even name which library I'm calling it from. Is there a delay function in time.h? If so, what is it and how do you use it? Please Help - Reading a file in efficient manner 16 Years Ago by anjaliraman …) { if( !m_streamSyslog.getline(pBuffer, nMaxMsgLen) ) { if( m_streamSyslog.eof() ) { m_streamSyslog.clear(); usleep(100000); } return false; } return true; } void SyslogReader::validateTrap(const string… difficulty in providing delay in gcc compiler 15 Years Ago by harry pottervs … linux i dont know how to provide delay.I used usleep() function but i cant see the successive movement of balls… serial communication RS 232 15 Years Ago by snehapatil …("written: %d%d\n", sCmd[0]); close(fd); usleep(30000); fd = 0; fd = open( "/dev/ttyS0" ,O_RDONLY… Problem Passing Sturcture Object To Queue - Linux? 15 Years Ago by gsuraj02 …<<rcs<<endl; return 0; } while(1) { usleep(1600); } } [/code] Multicasting only works on same machine (urgent) 14 Years Ago by MadSkyrim …;sendto() sent a different number of bytes than expected"); usleep(pulse * 1000); } [/CODE] Any ideas? Linux sleep(); 14 Years Ago by Slacked … then writes out the complete sentence. I've tried the usleep and nanosleep functions as well, but no satisfaction. Input without hitting enter 14 Years Ago by petteyg … main() { char c; int i=0; nonblock(NB_ENABLE); while(!i) { usleep(1); i=kbhit(); if (i!=0) { c=fgetc(stdin); if… Dining Philosopher Code Has problems 14 Years Ago by bohongtw … (true) { sleep(1); for (i = 0; i < number; i++) { usleep(1000); printf("%d: %-8s ", i, philosophers[i].status… PHP sockets from remote host 14 Years Ago by Kalphiter …;. $file[1] ."]"); echo("Beep sent\n"); } usleep(10000); socket_set_block($sock); $read[0] = $sock; for($i = 0; $i… how to check if semaphore is lock efficiently 13 Years Ago by neti1987 … the main thread locked the first semaphore - break the loop. usleep(1); // else - wait milisecond and check again. } // continue for the…