Swoole? ??? ??? ????? ??? ?? ??? ?? ??? PHP ???? ?? ??????, ??? ? ???? ?? ?? ??????? ??? ??? ? ????. ??? ????? ????? ???? ??? ?? ???? ?? ??? CPU ???? ?? ??? ???? ??? ??? ???? ??? ?? ? ????. ??? ? ???? Swoole ??? ??? ???? ?????? ??? CPU ???? ????? ??? ???? ???? ??? ?? ??? ???????.

1. ??? IO ??

Swoole ?????? ??? IO ????? ??? ??? ???? ?? ????? CPU? ??? ?? ? ????. ?? ??? ?? IO ??? ??? ??? ????? ??, ???? IO? IO? ???? ?? ?? ??? ?? ??? ? ???? ??? ??? ??? ?? ???? ?????.

??? ??? IO? ???? ??? HTTP ?? ??? ????.

$http = new swoole_http_server("0.0.0.0", 9501);

// 設(shè)置異步工作進(jìn)程數(shù)
$http->set([
    'worker_num' => 4,
    'task_worker_num' => 2,
    'dispatch_mode' => 2,
]);

$http->on('Request', function (swoole_http_request $request, swoole_http_response $response) use ($http) {
    $response_server = "<h1>Hello World!</h1>";
    $http->task($response_server);
    $response->end($response_server);
});

$http->on('Task', function (swoole_http_server $server, $task_id, $from_id, $data) use ($http) {
    // 處理完任務(wù)后，將任務(wù)結(jié)果發(fā)送給Worker進(jìn)程
    $http->finish($data);
});

$http->on('Finish', function (swoole_http_server $server, $task_id, $data) {
    echo "Task {$task_id} has finished, data={$data}
";
});

$http->start();

? ????? ??? ?? ???? ??, ? $http->task()</? ?????. code> ???? ??? ??? ??? ?? ?? ??? ?, ??? ?? ?? ???? ??? ????, ? ??? <code>$http->finish()? ??? Worker ????? ?????. ???. ??? ?? ??? ????? ???? ?? ???? ?? ??? ???? ???? ? ????. $http->task()方法將要執(zhí)行的任務(wù)投遞到異步任務(wù)池中，然后在異步任務(wù)處理函數(shù)中處理任務(wù)，并使用$http->finish()方法返回結(jié)果給Worker進(jìn)程。這樣可以避免Worker進(jìn)程被阻塞，從而提高服務(wù)器的性能和吞吐量。

二、使用多進(jìn)程并行處理

Swoole框架可以通過設(shè)置多個進(jìn)程來并行地處理客戶端的請求，從而提高服務(wù)器的并發(fā)能力和效率。多進(jìn)程可以充分利用CPU的多核資源，實現(xiàn)更高的并發(fā)處理能力。

以下是一個使用多進(jìn)程并行處理的HTTP服務(wù)器代碼示例：

$http = new swoole_http_server("0.0.0.0", 9501);

// 設(shè)置多進(jìn)程工作模式
$http->set([
    'worker_num' => 4,
    'task_worker_num' => 2,
    'dispatch_mode' => 2,
]);

$http->on('WorkerStart', function (swoole_http_server $serv, $worker_id) {
    // 每個Worker進(jìn)程單獨(dú)創(chuàng)建MySQL連接
    if ($worker_id >= $serv->setting['worker_num']) {
        $db = new mysqli("127.0.0.1", "root", "password", "test");
        if ($db->connect_errno)
            die("mysql connect error: ". $db->connect_error);
        $GLOBALS['db'] = $db;
    }
});

$http->on('Request', function (swoole_http_request $request, swoole_http_response $response) use ($http) {
    $response_server = "<h1>Hello World!</h1>";
    $http->task($response_server);
    $response->end($response_server);
});

$http->on('Task', function (swoole_http_server $server, $task_id, $from_id, $data) use ($http) {   
    $db = $GLOBALS['db'];
    $result = $db->query("SELECT COUNT(*) FROM users");
    $http->finish($result->fetch_assoc());
});

$http->on('Finish', function (swoole_http_server $server, $task_id, $data) {
    echo "Task {$task_id} has finished, data=".json_encode($data)."
";
});

$http->start();

在上述代碼中，我們使用了多進(jìn)程工作模式，并添加了一個WorkerStart事件回調(diào)函數(shù)，在其中創(chuàng)建了一個MySQL連接，并將其保存在全局變量$GLOBALS['db']中，然后在Task事件回調(diào)函數(shù)中以異步的方式去查詢MySQL數(shù)據(jù)庫，并在查詢結(jié)果返回時使用$http->finish()方法將結(jié)果返回給Worker進(jìn)程。

三、合理設(shè)置Server選項

在使用Swoole框架開發(fā)服務(wù)器時，可以通過設(shè)置不同的Server選項來影響服務(wù)器的性能和穩(wěn)定性。以下是一些常用的Server選項：

1. worker_num：設(shè)置Worker進(jìn)程數(shù)，影響服務(wù)器的并發(fā)處理能力和性能。
2. task_worker_num：設(shè)置異步任務(wù)Worker進(jìn)程數(shù)，影響異步任務(wù)并發(fā)能力和性能。
3. dispatch_mode：設(shè)置消息分發(fā)模式，影響任務(wù)調(diào)度的性能和穩(wěn)定性。
4. task_ipc_mode：設(shè)置異步任務(wù)進(jìn)程間通信方式，影響異步任務(wù)的性能和穩(wěn)定性。
5. heartbeat_check_interval：設(shè)置服務(wù)器的心跳檢測間隔，當(dāng)客戶端心跳超時時，會觸發(fā)close
2. ?? ???? ?? ?? ??

Swoole ?????? ????? ??? ??? ???? ?? ?? ????? ??? ? ???? ??? ??? ??? ???? ?????. ?? ????? CPU? ?? ?? ???? ??? ???? ? ?? ?? ?? ??? ??? ? ????.

??? ?? ???? ?? ??? ???? HTTP ?? ??? ????.

rrreee

? ????? ?? ???? ?? ??? ???? WorkerStart ??? ?? ??? ?????. ?? MySQL ??? ???? ?? ?? $GLOBALS['db']? ??? ?? Task ??? ?? ?? ???????? MySQL? ?????? ???? $http->finish() ???? ?? ??? ??? ? Worker ????? ??? ?????.

??3. ?? ??? ???? ?????????Swoole ?????? ???? ??? ??? ? ??? ?? ??? ???? ??? ??? ???? ??? ? ? ????. ??? ????? ???? ? ?? ?? ?????. ??

1. worker_num: ??? ?? ?? ??? ??? ??? ??? ??? ???? ?? ?????. ??
2. task_worker_num: ???? ???? ??? ?? ?? ???? ??? ??? ???? ??? ??? ???. ??
3. dispatch_mode: ?? ??? ??? ???? ??? ??? ??? ?? ??? ?????. ??
4. task_ipc_mode: ??? ??? ???? ? ?? ??? ???? ??? ??? ??? ???? ??? ????. ??
5. heartbeat_check_interval: ??? ???? ?? ??? ?????. ????? ???? ??? ???? ??? ??? ?? ???? ???? ?? ???? ?? close ???? ??????. . ????????? ?? ????? ?? ??? ??? ?? ???? ???? ??? ??? ???? ?? ? ????. ??????: ????? ??? ??? ???? ?? Swoole ??? ??? ???? ????? ???? ? ????. ??? ??? ???? ?? ? ??? ?? ?? ??? ????? ???? ?? ??? ?????. ? ?? Swoole ????? ??? ??? ??? ????! ??

? ??? Swoole Advanced: ?? CPU ???? ????? ??? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!