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multithreading

Speed up zgrep on a multi-core computer

by IT Nursery

Or symlink /usr/local/bin/{gzip,gunzip} to respective binaries since that is likely to be in PATH before /usr/bin $ sudo ln -s /usr/bin/pigz /usr/local/bin/gzip $ … Read more

Tags grep, gzip, multithreading

Linux max threads count

by IT Nursery

We ran into this issue when connection issues from the mongo client (java) get interrupted (it seems by the AWS network). With TCP_KEEPALIVE … Read more

Tags linux, multithreading

unpigz (and untar) to a specific directory

by IT Nursery

unpigz (and untar) to a specific directory

Tags compression, gzip, multithreading, tar

What is the need of the struct thread_info in locating struct task_struct?

by IT Nursery

Light-weight processes don’t have a task_struct; a stack and a small amount of information would be enough. Several LWPs share the same task_struct, … Read more

Tags c, kernel, linux, multithreading, process

Is vim multithreaded?

by IT Nursery

Is vim multithreaded?

Tags multithreading, vim

How to call a service URL from bash shell script in parallel?

by IT Nursery

Try ab, you get a nice statistic too: ab -n 10000 -c 70 http://www.betaservice.domain.host.com/web/hasChanged?ver=0 This call will do 10000 requests with concurrency of … Read more

Tags bash, download, multithreading, shell-script

Multi-Threading/Forking in a bash script

by IT Nursery

Multi-Threading/Forking in a bash script

Tags multithreading, parallelism, shell-script

Why do top and ps show different PIDs for the same processes?

by IT Nursery

It’s just a difference in presentation. Look at the LWP column on your ps output — LWP is LightWeight Process. The kernel can … Read more

Tags multithreading, pid, process-management

Use multi-threaded make by default?

by IT Nursery

Use multi-threaded make by default?

Tags command-line, compiling, make, multithreading

Why on modern Linux, the default stack size is so huge – 8MB (even 10 on some distributions)

by IT Nursery

8MB is the virtual size of the stack. A page fault will happen when your application tries to use more stack than is … Read more

Tags linux, multithreading, osx, stack, virtual-memory
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