process-control

Process control block in Linux

由 我怕爱的太早我们不能终老 提交于 2021-02-07 18:14:19
问题 How to extract PCB in linux? or Is there any kernel module available to read it? 回答1: The closest Linux equivalent is the task_struct ; however, that's only used inside the kernel. It's not exported to userspace. All information on running processes on Linux is exposed via procfs , which is mounted at /proc . See man proc for details on what's available and where. 来源： https://stackoverflow.com/questions/8162956/process-control-block-in-linux

Process control block in Linux

由 岁酱吖の 提交于 2021-02-07 18:03:12
问题 How to extract PCB in linux? or Is there any kernel module available to read it? 回答1: The closest Linux equivalent is the task_struct ; however, that's only used inside the kernel. It's not exported to userspace. All information on running processes on Linux is exposed via procfs , which is mounted at /proc . See man proc for details on what's available and where. 来源： https://stackoverflow.com/questions/8162956/process-control-block-in-linux

Sleep in a while loop gets its own pid

由 余生颓废 提交于 2020-01-13 12:09:48
问题 I have a bash script that does some parallel processing in a loop. I don't want the parallel process to spike the CPU, so I use a sleep command. Here's a simplified version. (while true;do sleep 99999;done)& So I execute the above line from a bash prompt and get something like: [1] 12345 Where [1] is the job number and 12345 is the process ID (pid) of the while loop. I do a kill 12345 and get: [1]+ Terminated ( while true; do sleep 99999; done ) It looks like the entire script was terminated.

Sleep in a while loop gets its own pid

由 元气小坏坏 提交于 2020-01-13 12:09:10
问题 I have a bash script that does some parallel processing in a loop. I don't want the parallel process to spike the CPU, so I use a sleep command. Here's a simplified version. (while true;do sleep 99999;done)& So I execute the above line from a bash prompt and get something like: [1] 12345 Where [1] is the job number and 12345 is the process ID (pid) of the while loop. I do a kill 12345 and get: [1]+ Terminated ( while true; do sleep 99999; done ) It looks like the entire script was terminated.

Process Control Issue

由 岁酱吖の 提交于 2020-01-11 11:43:48
问题 Why doesn't the loop end the first time collatz() returns 1? def collatz(): global number if number % 2 == 0: number = number // 2 print(number) return number else: number = 3 * number + 1 print(number) return number try: number = int(input('Please enter an integer except zero.\n')) except ValueError: print("ValueError: invalid value.") number = int(input('You must enter an integer except zero.\n')) while collatz() != 1: # if input(4), the output will be: 4 2 1 4 2 1 collatz() # another way,

Storing and retrieving process control block

由 北城余情 提交于 2019-12-20 10:20:32
问题 When a process is in execution, the contents of the PCB (which is in kernel memory space?) are loaded onto the CPU registers, and status registers , kernel stack pointers , user stack pointers , etc. When there is a context switch to another process, the current "context" is stored back in the PCB and a switch is made to the new PCB. Now when the kernel wants to bring back this PCB back into "context", how does it find this PCB, which is in the memory now? What information helps the kernel in

PHP Daemon/worker environment

由 泪湿孤枕 提交于 2019-12-17 17:29:29
问题 Problem: I want to implement several php-worker processes who are listening on a MQ-server queue for asynchronous jobs. The problem now is that simply running this processes as daemons on a server doesn't really give me any level of control over the instances (Load, Status, locked up)...except maybe for dumping ps -aux. Because of that I'm looking for a runtime environment of some kind that lets me monitor and control the instances, either on system (process) level or on a higher layer (some

R control chart with multiple lines

由 こ雲淡風輕ζ 提交于 2019-12-11 05:54:05
问题 I'm working with physicians on a project to monitor compliance to proper dosage of antibiotics. To track the proportion of events that are not compliant, physicians like to use P charts I would like to generate a P-Chart with 3 limit lines (corresponding to 1, 2, and 3 SDs) above and below the central line. I have not found a way to do this. I would also like the plot to have several breaks that separate the data into several time periods, which I can do in the qicharts package but not in

Sleep in a while loop gets its own pid

由 孤者浪人 提交于 2019-12-05 17:49:46
I have a bash script that does some parallel processing in a loop. I don't want the parallel process to spike the CPU, so I use a sleep command. Here's a simplified version. (while true;do sleep 99999;done)& So I execute the above line from a bash prompt and get something like: [1] 12345 Where [1] is the job number and 12345 is the process ID (pid) of the while loop. I do a kill 12345 and get: [1]+ Terminated ( while true; do sleep 99999; done ) It looks like the entire script was terminated. However, I do a ps aux|grep sleep and find the sleep command is still going strong but with its own

Process Control Issue

由 匆匆过客 提交于 2019-12-02 03:26:46
Why doesn't the loop end the first time collatz() returns 1? def collatz(): global number if number % 2 == 0: number = number // 2 print(number) return number else: number = 3 * number + 1 print(number) return number try: number = int(input('Please enter an integer except zero.\n')) except ValueError: print("ValueError: invalid value.") number = int(input('You must enter an integer except zero.\n')) while collatz() != 1: # if input(4), the output will be: 4 2 1 4 2 1 collatz() # another way, which works: while number != 1: --> # also input(4), the output will be: 4 2 1 collatz() In your first
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