Is there a way to disable interrupts for a Solaris 9/ sun OS 5.9 machine

Question

I am trying to figure out if there is a way to disable interrupts in solaris 9 on a sun 5.9 sparc9 machine, while under lock. I don't want the process to get bumped under lock. I have been looking for a way to do it and have come up empty handed. Am I just missing something? -Thanks

Answer 1

Thanks for the response, I understand that using real time scheduling I can still be preempted. I also understand how to solve my problem on a multiple CPU machine. Unfortunately I only have that luxery on part of the system. There is a part of the system, 7% of the processes, that run on a single cpu machine. This is a customer requirement, I can't change it. What I want to do is possibly take advantage of the priority inheritance features of the mutex locks, however, I believe this needs to be enacted as root, since they need to run real time and it seems that you need to be root to enable the real time features. However, to propose this as an option to solve my issue, I need to show that it works. I have kicked off a process using priocntl with RT and a priority of 11, and I can see them run as real time and in a priority level of 111 using TOP, but when I put code in so I know they are in the mutex portion of the code, I don't see a priority change. I created a mutex with the protect option and a priority ceiling of 5. Does anyone know if this would be reflected anywhere. I tried opening an xterm and using a priocntl -d, but I see priority 11 even when it is in a mutex with a ceiling of 5. I would have expected it to go to five. Just in case I had the levels backwards, I also tried a ceiling of twenty and there still was no change. How can I test the priority inheritance capability? Does anyone know which call would reflect the priority change? I just need to show it does something in order to propose the change at that low of a level in our system code. Thanks again everyone who has tried to help me understand this.