Threads: 684 total, 1 running, 683 sleeping, 0 stopped, 0 zombie You can also toggle on or off thread view mode while top is running, by pressing 'H' key. To enable thread views in the top output, invoke top with "-H" option. The top command can show a real-time view of individual threads. The "SID" column represents thread IDs, and "CMD" column shows thread names. The following command list all threads created by a process with :įor example to list the threads for the following java process:ĭeploy 97947 97942 1 00:51 ? 00:13:51 java The "-T" option for the ps command enables thread views. Here are several ways to show threads for a process on Linux: ![]() Classic command-line tools such as ps or top, which display process-level information by default, can be instructed to display thread-level information. To the Linux kernel's scheduler, threads are nothing more than standard processes which happen to share certain resources. Each thread will then have its own thread ID (TID). ![]() In Linux, threads (also called Lightweight Processes (LWP)) created within a program will have the same "thread group ID" as the program's PID. These properties make threads an efficient mechanism for concurrent execution. When threads are forked inside a program for multiple flows of execution, these threads share certain resources (e.g., memory address space, open files) among themselves to minimize forking overhead and avoid expensive IPC (inter-process communication) channel. Threads are a popular programming abstraction for parallel execution on modern operating systems. ![]() Topics: Performance, Red Hat / Linux How to view threads of a process on Linux
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