0
votes
0answers
13 views

Why would attempts to bind affinities for rcu kthreads fail?

I am trying to get full tickless mode working on my box on Ubuntu kernel 3.10.39. I am running the following command: for i in `pgrep rcu` ; do taskset -pc 0 $i ; done It seems to work on some of ...
2
votes
1answer
217 views

Generate interrupts for purpose of stress testing

I'm testing the quality of a generated PWM signal on a Raspbery Pi. I would like to test how it behaves if there are lots of interrupts coming. Is there a way to fake interrupts or force 2000 ...
1
vote
1answer
169 views

What value is stored in linux xtime variable?

Whenever I print the value of /proc/interrupts the value of rtc0 in IRQ8 which is for RTC shows only 1 interrupt on CPU0. I have read that when booting the value of the xtime variable is stored from ...
2
votes
2answers
805 views

Can system calls be interrupted?

Please comment on the following sentence: On the standard Linux kernel without the rt patch, interrupts can't interrupt ongoing system calls. The reason why our machine doesn't stop working ...
2
votes
1answer
359 views

Are time interrupts always followed by a scheduler call?

When a timer interrupt occurred the ISR is called to service the interrupt. Is it okay to assume that every timer interrupt ends with a call to the scheduler on which process should continue running ...
1
vote
0answers
84 views

Further clarification as to whether interuppts are disabled in top-half handler or not [closed]

Recently I came across a note in an online post that states the following: In modern kernels, most of the differences between fast and slow interrupts have disappeared. There remains only one: ...
4
votes
1answer
2k views

What does Linux's “nointremap” option do?

Ubuntu 12.10 alpha 2 works perfectly on my new 11" 2012 Macbook Air, but only when I boot with the "nointremap" option. Supposedly this is not good to use as a permanent solution. What exactly does ...