Re: [patch 2/3] mutex subsystem: fastpath inlining

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



* Nicolas Pitre <[email protected]> wrote:

> > * Nicolas Pitre <[email protected]> wrote:
> > 
> > > Some architectures, notably ARM for instance, might benefit from 
> > > inlining the mutex fast paths. [...]
> > 
> > what is the effect on text size? Could you post the before- and 
> > after-patch vmlinux 'size kernel/test.o' output in the nondebug case, 
> > with Arjan's latest 'convert a couple of semaphore users to mutexes' 
> > patch applied? [make sure you've got enough of those users compiled in, 
> > so that the inlining cost is truly measured. Perhaps also do 
> > before/after 'size' output of a few affected .o files, without mixing 
> > kernel/mutex.o into it, like vmlinux does.]
> 
> Theory should be convincing enough. [...]

please provide actual measurements (just a simple pre-patch and 
post-patch 'size' output of vmlinux is enough), so that we can see the 
inlining cost. Note that x86 went to a non-inlined fastpath _despite_ 
having a compact CISC semaphore fastpath.

	Ingo
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux