What is Ksoftirqd?

A ksoftirqd is a per-CPU kernel thread raised to handle unserved software interrupts: In the preceding top sample from my personal computer, you can see ksoftirqd/n entries, where n is the CPU number that the ksoftirqds runs on.

What is Kswapd Linux?

The name swap daemon is a bit of a misnomer as the daemon does more than just swap modified pages out to the swap file. Its task is to keep the memory management system operating efficiently.

What is Irqbalance Linux?

irqbalance is a Linux daemon that distributes interrupts over among the processors and cores in your computer system. The design goal of irqbalance is to do find a balance between power savings and optimal performance. This allows a given set of CPU’s to not be bothered by any interrupt service load.

How do I clear a cache in Linux?

How to Clear Cache in Linux?

1. Clear PageCache only. # sync; echo 1 > /proc/sys/vm/drop_caches.
2. Clear dentries and inodes. # sync; echo 2 > /proc/sys/vm/drop_caches.
3. Clear pagecache, dentries, and inodes. # sync; echo 3 > /proc/sys/vm/drop_caches.
4. sync will flush the file system buffer.

What is Kswapd Ubuntu?

The process kswapd0 is the process that manages virtual memory. Your machine should have RAM, SWAP, and the EXT4 on your HDD/SSD. The ext4 is where everything is stored, and it is always slower to access than RAM. RAM is like a half-way running space for programs to access information quickly.

What is RCU CPU stall?

Please note that RCU only detects CPU stalls when there is a grace period in progress. This kernel configuration parameter defines the period of time that RCU will wait from the beginning of a grace period until it issues an RCU CPU stall warning. This time period is normally 21 seconds.

What is RCU fundamentally?

Read-copy update (RCU) is a synchronization mechanism that was added to the Linux kernel in October of 2002. RCU ensures that reads are coherent by maintaining multiple versions of objects and ensuring that they are not freed up until all pre-existing read-side critical sections complete.