1.Executors.newFixedThreadPool(int nThreads):創(chuàng)建一個(gè)線程池,具有固定線程數(shù),運(yùn)行在共享的無(wú)界隊(duì)列中。在大多數(shù)時(shí)候,線程會(huì)主動(dòng)執(zhí)行任務(wù),當(dāng)所有的線程都在執(zhí)行任務(wù)時(shí),有新的任務(wù)加入進(jìn)來(lái),就會(huì)進(jìn)入等待隊(duì)列(可以有源源...
... increment() 時(shí)就會(huì)出現(xiàn)問(wèn)題: ExecutorService executor = Executors.newFixedThreadPool(2); IntStream.range(0, 10000) .forEach(i -> executor.submit(this::increment)); stop(executor); System.out.printl...
...生成線程池 Executors類(lèi)中的靜態(tài)方法: static ExecutorService newFixedThreadPool(int nThreads) 創(chuàng)建一個(gè)可重用固定線程數(shù)的線程池 參數(shù): int nThreads:創(chuàng)建線程池中包含的線程數(shù)量 返回值: ExecutorService接口,返回的是ExecutorServi....
... public static void main(String[] args) { final ExecutorService newFixedThreadPool = Executors.newFixedThreadPool(5); for (int i = 0; i < 10; i++) { newFixedThreadPoo...
...時(shí),我們就會(huì)遇到大麻煩: ExecutorService executor = Executors.newFixedThreadPool(2); IntStream.range(0, 10000) .forEach(i -> executor.submit(this::increment)); stop(executor); System.out.println(count);...
...其底層執(zhí)行的簡(jiǎn)單流程 ExecutorService executorService = Executors.newFixedThreadPool(3); executorService.submit(new NewTask()); 簡(jiǎn)單定義了如上兩句代碼,JDK自動(dòng)創(chuàng)建3個(gè)固定大小的線程的線程池,submit實(shí)現(xiàn)了Runnable接口的NewTask對(duì)象以后,JDK自動(dòng)啟動(dòng)...
...er atomicInt = new AtomicInteger(0); ExecutorService executor = Executors.newFixedThreadPool(2); IntStream.range(0, 1000) .forEach(i -> executor.submit(atomicInt::incrementAndGet)); stop(exe...
...eadPoolExecutor executor = (ThreadPoolExecutor) Executors .newFixedThreadPool(3); executor.execute(new MyRunnable()); } } class MyRunnable implements Runnable { @Ov...
...池的當(dāng)前大小超過(guò)了基本大小時(shí),這個(gè)線程將被終止。 newFixedThreadPool 工廠方法將線程池的基本大小和較大大小設(shè)置為參數(shù)中的執(zhí)行值,而且創(chuàng)建的線程池不會(huì)超時(shí)。newCachedThreadPool工廠方法將線程池的較大大小設(shè)置為Integer.MAX_VAL...
... this.addInterceptHandler(handler); } executor = Executors.newFixedThreadPool(poolSize); } executor = Executors.newFixedThreadPool(poolSize);這句代碼雖然創(chuàng)建了一個(gè)固定線程數(shù)量的線程池,但是線程池的任務(wù)隊(duì)列并沒(méi)有...
...程池都實(shí)現(xiàn)了 ExecutorService接口. 常用方法有以下幾個(gè): newFixedThreadPool(int Threads): 創(chuàng)建固定數(shù)目線程的線程池, 超出的線程會(huì)在隊(duì)列中等待. newCachedThreadPool(): 創(chuàng)建一個(gè)可緩存線程池, 如果線程池長(zhǎng)度超過(guò)處理需要, 可靈活回收空閑...
...er atomicInt = new AtomicInteger(0); ExecutorService executor = Executors.newFixedThreadPool(2); IntStream.range(0, 1000) .forEach(i -> executor.submit(atomicInt::incrementAndGet)); stop(exe...
...池保證所有任務(wù)的執(zhí)行順序按照任務(wù)的提交順序執(zhí)行。 2.newFixedThreadPool 創(chuàng)建固定大小的線程池。每次提交一個(gè)任務(wù)就創(chuàng)建一個(gè)線程,直到線程達(dá)到線程池的最大大小。線程池的大小一旦達(dá)到最大值就會(huì)保持不變,如果某個(gè)線程...
...池保證所有任務(wù)的執(zhí)行順序按照任務(wù)的提交順序執(zhí)行。 2.newFixedThreadPool 創(chuàng)建固定大小的線程池。每次提交一個(gè)任務(wù)就創(chuàng)建一個(gè)線程,直到線程達(dá)到線程池的最大大小。線程池的大小一旦達(dá)到最大值就會(huì)保持不變,如果某個(gè)線程...
...象。 以上各工具方法中使用最廣泛的為newCachedThreadPool、newFixedThreadPool及newSingleThreadExecutor,這三個(gè)方法創(chuàng)建的ExecutorService對(duì)象均是其子類(lèi)ThreadPoolExecutor(嚴(yán)格來(lái)說(shuō)newSingleThreadExecutor方法返回的是FinalizableDelegatedExecutorServi...
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