Tagged Questions
1
vote
0answers
16 views
Get process's timeslice in user mode [migrated]
How can I get the value of process's timeslice in user mode? I designed a new scheduling policy, and I want to check if processes with the same policy (my policy) have the same timeslice to run. It is ...
1
vote
1answer
57 views
Do kernel counters for jiffies in state exist in Linux?
I am looking to get time/jiffie stats on the state of a daemon process. The states I'm referring to are mentioned in the Linux Kernel Proc Filesystem document. Running, Sleeping, uninterruptible ...
1
vote
1answer
243 views
controlling priority of applications using cgroups
I would like to understand cgroups better and would like to understand the use-cases for applying cgroups.
Are cgroups a good way for prioritizing different applications (i.e, giving higher priority ...
3
votes
2answers
247 views
How preemption works on Linux when a program has a timer less then 4ms?
Jiffies in most Linux system are defaulted to 250 (4ms). The questions is that what happens when a program has a usleep() less then 4ms ? Of course it works as should when it is scheduled. But what ...
5
votes
2answers
427 views
Does Linux kernel 3.x use the CFS process scheduler?
Does the latest version of the Linux kernel (3.x) still use the Completely Fair Scheduler (CFS) for process scheduling which was introduced in 2.6.x ?
If it doesn't, which one does it use, and how ...
3
votes
2answers
277 views
How can you determine which process scheduler is being used?
I.e. is it the O(1) scheduler, the CFS scheduler, or an older one?
10
votes
2answers
235 views
What are the effects, if any, of scheduler priorities and policies for threads in an uncontended cpuset?
I have a Linux system where we have used cgroups to create two cpu_exclusive cpusets, A and B, and where we have migrated all user threads and all unbound kernel threads to a cgroup attached to cpuset ...
2
votes
1answer
180 views
Get pid of long running command executed via at
I would like to spawn a persistent netcat server. My command of choice is the following:
echo "bash -c \"while [ 1 ]; do nc -l -p 1111 >> check; done\"" | at now
I am wondering how I can get ...
1
vote
1answer
292 views
Disk Scheduler in Linux
I am studying about Disk Scheduling in my OS class. Thought about the disk scheduler in Linux. When I run
cat /sys/block/sda/queue/scheduler
noop anticipatory deadline [cfq]
Someone explain about ...
6
votes
3answers
969 views
Which Scheduling algorithm is used in Linux?
Recently in an interview I was asked about the Scheduling algorithm used by Linux Operating system. What is the algorithm used any why?
Also, what algorithm is used in in real-time operating systems ...
5
votes
1answer
357 views
Linux process scheduling - Cap/Weight based?
I am just trying to understand the basics of Linux scheduler.
Is Linux scheduler a Cap based or weight based scheduler?
I was previously using Xen. Now I am moving from Xen to KVM. I read VMs are ...
3
votes
3answers
153 views
Changing the disk scheduler on the fly
Can the Linux disk scheduler be changed on the fly by writing to /sys/block/sda/queue/scheduler? Should applications (e.g. Mysql) be stopped / started when changing?
6
votes
2answers
3k views
Bash Script on Startup? (Linux)
Is there any way to make/run a bash script on reboot
(like in Debian/Ubuntu for instance, since thats what my 2 boxes at home have)
Also, any recommended guides for doing cron jobs? I'm completely ...
6
votes
2answers
10k views
How can get a list of all scheduled cron jobs on my machine?
My sysadmin has set up a bunch of cron jobs on my machine. I'd like to know exactly what is scheduled for what time. How can I get that list?
4
votes
1answer
206 views
Are there any Workload Management subsystems for Linux?
Asked this on superuser, got no response:
Can anyone tell me of the status/state of WLM (Workload Management) kernel scheduler systems in Linux? Alternatively, any user-space process goal-based load ...
4
votes
1answer
759 views
How do I view the IO priority of a process?
How can I view the IO priority of a process? like to see for example if something has been ionice-ed.
