[Nouveau] [Bug 76732] Kworker using 100% CPU

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=76732

--- Comment #17 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to comment #16)
> Samples: 121K of event 'cycles', Event count (approx.): 71741963089
> +  64.62%      kworker/1:1  [kernel.kallsyms]        [k] ioread32
> +  18.47%      kworker/1:1  [kernel.kallsyms]        [k] native_read_tsc
> +  13.71%      kworker/1:1  [kernel.kallsyms]        [k] delay_tsc
> +   2.31%          swapper  [kernel.kallsyms]        [k] ioread32

There was supposed to be a call graph... Perhaps you're using an older version
of perf? Or perhaps it really wants you to pass in -g for report? (Or you
didn't use -g when recording?)

Or maybe you're in the curses TUI and you have to select to expand? I forget
how it works :(

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