发表新帖
发表新帖

pcntl runs the same code several times, assistance required

前端 未结
关注
1 1579
逝去的感伤
逝去的感伤 2020-12-06 08:09

I am using pcntl in order to speed up a quite heave CLI php script, that consists mostly of a class, that is in charge of sending all of the auto-emailing on my application.

相关标签:
1条回答
  • 执笔经年
    2020-12-06 08:52

    Introduction

    I see you are trying to send mails $this->sendMail($html, $myTask['task_schedule_id']); and I think it's a really bad idea trying to use multiple process for this task. You should consider using message queue for this task because emails can be very slow.

    Use a Queue System

    You should be using Gearman, ZeroMQ or Beanstalkd for this task. Worst case scenario use Implement your own simple message queue with memcached.

    Here is a typical Gearman Example: https://stackoverflow.com/questions/13855907/when-to-send-auto-email-instantly-on-button-click-or-later

    Quick Fix

    Remove all those code and put it in a function called execute_worker where you can push the task to it

    // Break Task to groups
$tasks = array_chunk(range("A", "Z"), 10);
foreach($tasks as $task) {
    $pid = pcntl_fork();
    if ($pid == - 1) {
        throw new ErrorException('FORK FAILED, STATUS -1');
        break;
    }

    if ($pid == 0) {
        execute_worker($task); // In Child
        exit(); // In Child
    }
}

    Using Threads

    You can also use Worker or Thread in PHP with pThreads to speed up processing.

    • An easy to use, quick to learn Threading API for PHP5.3+
    • Execute any and all predefined and user declared methods and functions asynchronously
    • Ready made synchronization included, geared towards the PHP environment
    • Yes! Windows support

    Simple Project

    file_get_contents is said to be slow when compared with curl and no where close to the power of curl_multi_init which allows the processing of multiple cURL handles in parallel.

    See:

    • php get all the images from url which width and height >=200 more quicker
    • php - Fastest way to check presence of text in many domains (above 1000)

    Our Objective would be to implement our own Multi file_get_contents version

    Multi file_get_contents Example

    // My Storage
$s = new Storage();

// Threads Storage
$ts = array();

// Total Threads same as total pages
$pages = 100;

// Porpulate Threads (Don't Start Yet)
$i = 0;
while($i ++ < $pages) {
    $ts[] = new Process($s, $i);
}

// Start the timer
$start = microtime(true);

// Lets start all our Threads
foreach($ts as $t) {
    $t->start();
}

// Wait for all threads to compleate
foreach($ts as $t) {
    $t->join();
}

printf("\n\nFound %s in %d pages", number_format($s->total), $pages);
printf("\nFinished %0.3f sec", microtime(true) - $start);

    Output

    php a.php
3:01:37: 3548 #START    {"page":1}
3:01:37: 7064 #START    {"page":2}
3:01:37: 10908 #START   {"page":3}
3:01:37: 10424 #START   {"page":4}
3:01:37: 11472 #START   {"page":5}
3:01:37: 3876 #START    {"page":6}
3:01:37: 7276 #START    {"page":7}
3:01:37: 11484 #START   {"page":8}
3:01:37: 932 #START     {"page":9}
3:01:37: 11492 #START   {"page":10}
3:01:37: 11500 #START   {"page":11}
3:01:37: 11508 #START   {"page":12}
3:01:37: 11504 #START   {"page":13}
3:01:37: 11512 #START   {"page":14}
3:01:37: 11516 #START   {"page":15}
3:01:37: 11520 #START   {"page":16}
3:01:37: 11524 #START   {"page":17}
3:01:37: 11528 #START   {"page":18}
3:01:37: 10816 #START   {"page":19}
3:01:37: 7280 #START    {"page":20}
3:01:37: 11556 #START   {"page":21}
3:01:37: 11560 #START   {"page":22}
3:01:37: 11564 #START   {"page":23}
3:01:37: 11612 #START   {"page":24}
3:01:37: 11616 #START   {"page":25}
3:01:37: 11600 #START   {"page":26}
3:01:37: 11608 #START   {"page":27}
3:01:37: 11568 #START   {"page":28}
3:01:37: 11452 #START   {"page":29}
3:01:38: 11624 #START   {"page":30}
3:01:38: 11628 #START   {"page":31}
3:01:38: 11632 #START   {"page":32}
3:01:38: 11636 #START   {"page":33}
3:01:38: 11644 #START   {"page":34}
3:01:38: 11648 #START   {"page":35}
3:01:38: 11652 #START   {"page":36}
3:01:38: 11656 #START   {"page":37}
3:01:38: 11660 #START   {"page":38}
3:01:38: 11664 #START   {"page":39}
3:01:38: 11668 #START   {"page":40}
3:01:38: 11672 #START   {"page":41}
3:01:38: 11676 #START   {"page":42}
3:01:38: 11680 #START   {"page":43}
3:01:38: 11684 #START   {"page":44}
3:01:38: 11688 #START   {"page":45}
3:01:38: 11692 #START   {"page":46}
3:01:38: 11696 #START   {"page":47}
3:01:38: 11700 #START   {"page":48}
3:01:38: 11704 #START   {"page":49}
3:01:38: 11712 #START   {"page":50}
3:01:38: 11708 #START   {"page":51}
3:01:38: 11716 #START   {"page":52}
3:01:38: 11720 #START   {"page":53}
3:01:38: 11724 #START   {"page":54}
3:01:38: 11728 #START   {"page":55}
3:01:38: 11732 #START   {"page":56}
3:01:38: 11736 #START   {"page":57}
3:01:38: 11740 #START   {"page":58}
3:01:38: 11744 #START   {"page":59}
3:01:38: 11748 #START   {"page":60}
3:01:38: 11752 #START   {"page":61}
3:01:38: 11756 #START   {"page":62}
3:01:38: 11760 #START   {"page":63}
3:01:38: 11764 #START   {"page":64}
3:01:38: 11768 #START   {"page":65}
3:01:38: 11772 #START   {"page":66}
3:01:38: 11776 #START   {"page":67}
3:01:38: 11780 #START   {"page":68}
3:01:38: 11784 #START   {"page":69}
3:01:38: 11788 #START   {"page":70}
3:01:38: 11792 #START   {"page":71}
3:01:38: 11796 #START   {"page":72}
3:01:38: 11800 #START   {"page":73}
3:01:38: 11804 #START   {"page":74}
3:01:38: 11808 #START   {"page":75}
3:01:38: 11812 #START   {"page":76}
3:01:38: 11816 #START   {"page":77}
3:01:38: 11820 #START   {"page":78}
3:01:38: 11824 #START   {"page":79}
3:01:38: 11828 #START   {"page":80}
3:01:38: 11832 #START   {"page":81}
3:01:38: 11836 #START   {"page":82}
3:01:38: 11840 #START   {"page":83}
3:01:38: 11844 #START   {"page":84}
3:01:38: 11848 #START   {"page":85}
3:01:38: 11852 #START   {"page":86}
3:01:38: 11856 #START   {"page":87}
3:01:38: 11860 #START   {"page":88}
3:01:38: 11864 #START   {"page":89}
3:01:38: 11868 #START   {"page":90}
3:01:38: 11872 #START   {"page":91}
3:01:38: 11876 #START   {"page":92}
3:01:38: 11880 #START   {"page":93}
3:01:38: 11884 #START   {"page":94}
3:01:38: 11888 #START   {"page":95}
3:01:38: 11892 #START   {"page":96}
3:01:38: 11896 #START   {"page":97}
3:01:38: 11900 #START   {"page":98}
3:01:38: 11904 #START   {"page":99}
3:01:38: 11908 #START   {"page":100}
3:01:38: 11508 #END             {"page":12,"byte":1141,"count":155839}
3:01:38: 10424 #END             {"page":4,"byte":1201,"count":553595}
3:01:38: 11516 #END             {"page":15,"byte":1204,"count":119612}
3:01:38: 3548 #END              {"page":1,"byte":1208,"count":6737525}
3:01:38: 11484 #END             {"page":8,"byte":1160,"count":257021}
3:01:38: 11472 #END             {"page":5,"byte":1175,"count":446411}
3:01:38: 10908 #END             {"page":3,"byte":1222,"count":787301}
3:01:38: 11492 #END             {"page":10,"byte":1175,"count":193958}
3:01:38: 11504 #END             {"page":13,"byte":1130,"count":141450}
3:01:38: 11528 #END             {"page":18,"byte":1102,"count":95511}
3:01:38: 11524 #END             {"page":17,"byte":1147,"count":102727}
3:01:38: 11560 #END             {"page":22,"byte":1111,"count":73536}
3:01:38: 11556 #END             {"page":21,"byte":1101,"count":78097}
3:01:38: 11500 #END             {"page":11,"byte":1201,"count":172820}
3:01:38: 932 #END               {"page":9,"byte":1159,"count":222922}
3:01:38: 11520 #END             {"page":16,"byte":1135,"count":110510}
3:01:38: 7064 #END              {"page":2,"byte":1165,"count":1264444}
3:01:38: 11512 #END             {"page":14,"byte":1123,"count":129721}
3:01:38: 11612 #END             {"page":24,"byte":1115,"count":65012}
3:01:38: 11600 #END             {"page":26,"byte":1134,"count":58928}
3:01:38: 7276 #END              {"page":7,"byte":1189,"count":301469}
3:01:38: 10816 #END             {"page":19,"byte":1120,"count":89609}
3:01:38: 11616 #END             {"page":25,"byte":1052,"count":61793}
3:01:38: 3876 #END              {"page":6,"byte":1188,"count":362101}
3:01:38: 7280 #END              {"page":20,"byte":1079,"count":83632}
3:01:38: 11564 #END             {"page":23,"byte":1076,"count":68909}
3:01:38: 11632 #END             {"page":32,"byte":1095,"count":44013}
3:01:38: 11652 #END             {"page":36,"byte":1042,"count":37185}
3:01:38: 11452 #END             {"page":29,"byte":1097,"count":50532}
3:01:38: 11636 #END             {"page":33,"byte":1097,"count":42148}
3:01:38: 11644 #END             {"page":34,"byte":1124,"count":40236}
3:01:38: 11664 #END             {"page":39,"byte":1078,"count":32792}
3:01:38: 11668 #END             {"page":40,"byte":1017,"count":31487}
3:01:38: 11608 #END             {"page":27,"byte":1117,"count":55561}
3:01:38: 11628 #END             {"page":31,"byte":1076,"count":46133}
3:01:38: 11624 #END             {"page":30,"byte":1111,"count":48265}
3:01:38: 11568 #END             {"page":28,"byte":1076,"count":52851}
3:01:38: 11656 #END             {"page":37,"byte":1068,"count":35590}
3:01:38: 11688 #END             {"page":45,"byte":1062,"count":26060}
3:01:38: 11680 #END             {"page":43,"byte":1081,"count":28013}
3:01:38: 11672 #END             {"page":41,"byte":1086,"count":30320}
3:01:38: 11724 #END             {"page":54,"byte":1060,"count":19900}
3:01:38: 11716 #END             {"page":52,"byte":1069,"count":21079}
3:01:38: 11732 #END             {"page":56,"byte":1038,"count":18748}
3:01:38: 11692 #END             {"page":46,"byte":1033,"count":25230}
3:01:38: 11696 #END             {"page":47,"byte":1098,"count":24469}
3:01:38: 11728 #END             {"page":55,"byte":1003,"count":19353}
3:01:38: 11648 #END             {"page":35,"byte":1105,"count":38651}
3:01:38: 11660 #END             {"page":38,"byte":1075,"count":34037}
3:01:38: 11700 #END             {"page":48,"byte":1059,"count":23725}
3:01:39: 11720 #END             {"page":53,"byte":1028,"count":20463}
3:01:39: 11704 #END             {"page":49,"byte":1006,"count":22966}
3:01:39: 11712 #END             {"page":50,"byte":988,"count":22369}
3:01:39: 11676 #END             {"page":42,"byte":1113,"count":29144}
3:01:39: 11748 #END             {"page":60,"byte":1054,"count":17002}
3:01:39: 11684 #END             {"page":44,"byte":1041,"count":26999}
3:01:39: 11756 #END             {"page":62,"byte":1024,"count":16165}
3:01:39: 11760 #END             {"page":63,"byte":1036,"count":15814}
3:01:39: 11740 #END             {"page":58,"byte":1075,"count":17833}
3:01:39: 11736 #END             {"page":57,"byte":1064,"count":18293}
3:01:39: 11752 #END             {"page":61,"byte":1077,"count":16607}
3:01:39: 11708 #END             {"page":51,"byte":1045,"count":21668}
3:01:39: 11768 #END             {"page":65,"byte":1041,"count":15021}
3:01:39: 11764 #END             {"page":64,"byte":1063,"count":15405}
3:01:39: 11744 #END             {"page":59,"byte":1052,"count":17394}
3:01:39: 11800 #END             {"page":73,"byte":1025,"count":12361}
3:01:39: 11792 #END             {"page":71,"byte":1053,"count":13051}
3:01:39: 11796 #END             {"page":72,"byte":1092,"count":12721}
3:01:39: 11784 #END             {"page":69,"byte":1031,"count":13677}
3:01:39: 11780 #END             {"page":68,"byte":1019,"count":13967}
3:01:39: 11772 #END             {"page":66,"byte":1068,"count":14644}
3:01:39: 11816 #END             {"page":77,"byte":1045,"count":11185}
3:01:39: 11804 #END             {"page":74,"byte":1062,"count":12071}
3:01:39: 11824 #END             {"page":79,"byte":1047,"count":10719}
3:01:39: 11820 #END             {"page":78,"byte":1035,"count":10940}
3:01:39: 11788 #END             {"page":70,"byte":987,"count":13354}
3:01:39: 11776 #END             {"page":67,"byte":1036,"count":14278}
3:01:39: 11828 #END             {"page":80,"byte":1013,"count":10519}
3:01:39: 11832 #END             {"page":81,"byte":1052,"count":10318}
3:01:39: 11812 #END             {"page":76,"byte":991,"count":11465}
3:01:39: 11808 #END             {"page":75,"byte":1043,"count":11769}
3:01:39: 11860 #END             {"page":88,"byte":1018,"count":8991}
3:01:39: 11852 #END             {"page":86,"byte":971,"count":9362}
3:01:39: 11868 #END             {"page":90,"byte":1006,"count":8641}
3:01:39: 11840 #END             {"page":83,"byte":1026,"count":9922}
3:01:39: 11872 #END             {"page":91,"byte":980,"count":8464}
3:01:39: 11892 #END             {"page":96,"byte":936,"count":7727}
3:01:39: 11836 #END             {"page":82,"byte":1052,"count":10117}
3:01:39: 11844 #END             {"page":84,"byte":973,"count":9739}
3:01:39: 11864 #END             {"page":89,"byte":1033,"count":8821}
3:01:39: 11856 #END             {"page":87,"byte":994,"count":9169}
3:01:39: 11848 #END             {"page":85,"byte":1040,"count":9544}
3:01:39: 11896 #END             {"page":97,"byte":988,"count":7562}
3:01:39: 11876 #END             {"page":92,"byte":1003,"count":8294}
3:01:39: 11888 #END             {"page":95,"byte":995,"count":7860}
3:01:39: 11880 #END             {"page":93,"byte":1052,"count":8143}
3:01:39: 11900 #END             {"page":98,"byte":977,"count":7418}
3:01:39: 11904 #END             {"page":99,"byte":999,"count":7270}
3:01:39: 11884 #END             {"page":94,"byte":931,"count":8002}
3:01:39: 11908 #END             {"page":100,"byte":977,"count":7144}


Found 14,075,927 in 100 pages
Finished 1.489 sec

    Time Taken

    Found 14,075,927 in 100 pages
Finished 1.489 sec

    Classes Used

    class Process extends Thread {

    public function __construct($storage, $page) {
        $this->storage = $storage;
        $this->page = $page;
        // $this->start();
    }

    public function run() {
        $format = "%s: %1u %s\t%s\n";
        $formatTime = "g:i:s";
        $sleep = mt_rand(0, 1); // Just for Demo

        printf($format, date($formatTime), $this->getThreadId(), "#START", "{\"page\":$this->page}");

        // Do something useful
        $data = file_get_contents(sprintf("http://api.stackoverflow.com/1.1/tags?pagesize=100&page=%s", $this->page));

        // Decode the Data from API
        $json = json_decode(gzdecode($data));

        // Lets Build A profile
        $profile = array();
        $profile['page'] = $this->page;
        $profile['byte'] = strlen($data);

        // Do more work
        $profile['count'] = array_sum(array_map(function ($v) {
            return $v->count;
        }, $json->tags));

        $this->storage->total = bcadd($this->storage->total, $profile['count']);
        // Print Information
        printf($format, date($formatTime), $this->getThreadId(), "#END\t", json_encode($profile));
    }
}

class Storage extends Stackable {
    public $total = 0;

    public function run() {
    }
}

    Conclusion

    Did file_get_contents just get 100 pages in just 1.489 sec with my crappy connection. Yes it did. Tested the same code on my live server and It took me less than 0.939 sec to fetch 200 pages.

    Your application can be faster in so many ways you just have to use the right technology at the right place.

    0 讨论(0)
 看不清?
提交回复
热议问题