I’m doing a research on spinlock in Linux kernel. And I need to estimate the time for lock holding and lock waiting. To do that, I first tried to modify the spinlock function (arch_spin_lock()) but I could not modify that function because I could not build the kernel. This function was originally an inline function, but I think it was a problem because I made the function too long.
After I already did googling enough, I could not find any way to do that. So I’m asking this question. Is there a way to achieve that goal? I think there is a way to use msr or a system utility.
Please give me some hint.
Thannks!
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Answer
Check out man perf-lock (or its online page)
I think there is a way to use msr or a system utility.
perf uses MSR and is a system utility, so I suppose that’s the way you are looking for.