On Wed, 20 Apr 2005, Francesco Oppedisano wrote:
Hi, i'd like to know how much time does linux kernel run with disabled interrupts. So i would like to remap the instructions capable of disabling interrupt to other ones which count how much this time is... Does already exist a patch or tool capable to give me a magnitude order of the time spent by the kernel with disables interrupts? In uniprocessor systems, can i state that the only instruction capable of disabling interrupts is cli?
How do you propose to "remap" the CLI instruction? The kernel isn't going to trap on this perfectly legal instruction in kernel mode.
Also, interrupts can be disabled by masking them off in the controller(s) so there are many ways that any/all interrupts can be disabled.
Thank u very much
Francesco Oppedisano -
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