Re: Why can't we sleep in an ISR?

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Yes, you are right in this regard. An interrupt handler does steal the
time slice from the interrupted process.

So now I think it is considered an acceptable deviation in calculating
the process run time as well as determine process scheduling because
an ISR should take very short time to return, in part as a consequence
of the rule that ISR should not sleep.


2007/5/15, Learning Linux <learninglinux4@xxxxxxxxx>:
> The interrupt handler's execution time will definitely defer the
> execution of the process, but I think it does not steal the process's
> time slice (the time_slice field not subtracted).

It will definitely be substracted from the process's time slice.
Because the timeslice is substracted in timer interrupt, and does not
differenciate if the process is executing ISR or not.

-
To unsubscribe from this list: send the line "unsubscribe linux-newbie" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.linux-learn.org/faqs

[Index of Archives]     [Audio]     [Hams]     [Kernel Newbies]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Samba]     [Video 4 Linux]     [Fedora Users]

  Powered by Linux