Re: [RFC PATCH] alispinlock: acceleration from lock integration on multi-core platform

[One Thousand Gnomes]

On Sat, 9 Jan 2016 06:44:15 +0800
Ling Ma <ling.ma.program@xxxxxxxxx> wrote:

> The attachment (alispinlock.tar.bz2) includes original spinlock and
> alispinlock ,
> we compare them on 70 cores based on kernel 4.3, the alispinlock can
> improve performance upto 3x.
> 
> the link: https://www.mail-archive.com/linux-kernel@xxxxxxxxxxxxxxx/msg1035940.html
> indicates when we introduce the idea for real application(user space
> application  caused the bottle neck from  kernel spinlock )
> the spinlock performance is improved by 1.9x (perf top -d1 also tell
> us the spinlock cost time is reduced from 25% to 15%).
> 
> Appreciate your comments

So this has not been applied to actual real kernel locks (ie converted
some of the hot kernel locks to it) and then benchmarked with a real
world workload. This is just for the theoretical locking overhead ?

Alan