Re: [RFC][PATCH] tracepoints: Move the work out of line from hotpathsections

[H. Peter Anvin]

On 08/09/2012 03:25 PM, Steven Rostedt wrote:
>>
>> It might be better to improve gcc to move really cold branches out of
>> line (really, really far away), and use the compiler to do this, rather
>> than to use an extra indirection that adds bloat and complexity to the
>> kernel.
> 
> I think modifying gcc is something that can help more than tracing. But
> that's been a pipe dream for such a long time that I've started dreaming
> about winning a gold medal in the Olympics instead. Standing on the
> podium listening to the crowd chanting your name along with your country
> is more fun to dream about than seeing your unlikely code stop becoming
> hurdles for the CPU sprinters.
> 

At one point, maybe, but lately we have had a lot more traction from the
gcc developers, giving us features like __fentry__ and asm goto.

	-hpa

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