What does res mean in top?
resident size
RES stands for the resident size, which is an accurate representation of how much actual physical memory a process is consuming. (This also corresponds directly to the %MEM column.) This will virtually always be less than the VIRT size, since most programs depend on the C library.
What does top column mean?
Top gives you a snapshot of a system’s situation, e.g., free physical memory, number of running tasks, percentage of CPU time usage of each processes–all in a single view. So it’s like using ps, free, and uptime at the same time.
What is RES in CPU?
RES: How much physical RAM the process is using, measured in kilobytes. %CPU: The percentage of the processor time used by the process. %MEM: The percentage of physical RAM used by the process. TIME+: How much processor time the process has used. COMMAND: The name of the command that started the process.
What is PID in top command?
top command is used to show the Linux processes. It provides a dynamic real-time view of the running system. Usually, this command shows the summary information of the system and the list of processes or threads which are currently managed by the Linux Kernel. PID: Shows task’s unique process id.
How to calculate stack size in Linux res?
RES = CODE + DATA. r: CODE — Code size (kb) The amount of physical memory devoted to executable code, also known as the ‘text resident set’ size or TRS. s: DATA — Data+Stack size (kb) The amount of physical memory devoted to other than executable code, also known as the ‘data >resident set’ size or DRS.
Which is the best representation of a stack?
Stack Representation. A stack can be implemented by means of Array, Structure, Pointer, and Linked List. Stack can either be a fixed size one or it may have a sense of dynamic resizing. Here, we are going to implement stack using arrays, which makes it a fixed size stack implementation.
Which is the last pushed data on the stack?
At all times, we maintain a pointer to the last PUSHed data on the stack. As this pointer always represents the top of the stack, hence named top. The top pointer provides top value of the stack without actually removing it. First we should learn about procedures to support stack functions −
What does res mean in Linux top command?
RES != CODE + DATA in the output information of the top command,why? q: RES — Resident size (kb) The non-swapped physical memory a task has used.