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'htop' process and threads cpu usage?

I'm observing a multi threaded process in htop in tree view. If I were to strip it just to the problematic part, it looks somewhat like this: CPU% bin/process 100 `- ...
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1answer
338 views

Too many rcuos and rcuob processes in my VM

I am running CentOS 7.2 (3.10.0-327.18.2.el7.x86_64) as VMware guest with 2 cpu and 6 GB RAM on my Lenevo W540 iCore 7 having 32 GB RAM. I see 128 processes each for rcuos and rcuob in my VM. This ...
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How to renice all threads and child processes on Linux?

Linux does not follow the POSIX.1 standard which says that a renice on a process affects "all system scope threads in the process", because according to the pthreads(7) doc "threads do not share a ...
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356 views

API Monitoring and Hooking

I am currently reading the "Malware Analyst's Cookbook and DVD". There is a chapter "Dynamic Analysis" and there are also some recipes about hooking and monitoring API calls of process but it is for ...
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0answers
14 views

How are separate stacks for different threads allocated in kernel mode for a process in Linux Kernel?

If a system call is made for a process and sitting in kernel mode, if 2 threads are created then a)how are the stacks for each thread is created in kernel? b)If one of the thread switch back to ...
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141 views

Understanding Linux Perf sched-switch and context-switches

I've been trying to enable context switch events on perf and use perf script's dump from perf.data to investigate thread blocked time. So far the only two recording options that seem to be helpful ...
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0answers
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What exactly is the lwp and threads in solaris?

The book "Solaris Internals" says Solaris executes kernel threads for kernel-related tasks, such as interrupt handling, memory page management, device drivers, etc. For user-process execution, kernel ...
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84 views

How thread context switch faster then the process context switch?

I want to know how thread context switch faster then the process context switch? For example, in the apache web server running on ubuntu can use either the Prefork MPM (spawning multiple child ...
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threads limit on linux

My box is: x86_64 x86_64 x86_64 GNU/Linux Red Hat Enterprise Linux Server release 6.3 whan I run sample java app (does not matter how much java heap I provide!), it creates 2016 threads and dies with ...