Re: [PATCH] mm: Remove the redundant updating of stats_flush_threshold

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

 



On Sat, Jul 23, 2022 at 12:49:49AM +0800, Jiebin Sun wrote:
> From: jiebin sun <jiebin.sun@xxxxxxxxx>
> 
> Remove the redundant updating of stats_flush_threshold. If the
> global var stats_flush_threshold has exceeded the trigger value
> for __mem_cgroup_flush_stats, further increment is unnecessary.
> 
> Apply the patch and test the pts/hackbench-1.0.0 Count:4 (160 threads).
> 
> Score gain: 1.95x
> Reduce CPU cycles in __mod_memcg_lruvec_state (44.88% -> 0.12%)
> 
> CPU: ICX 8380 x 2 sockets
> Core number: 40 x 2 physical cores
> Benchmark: pts/hackbench-1.0.0 Count:4 (160 threads)
> 
> Signed-off-by: Jiebin Sun <jiebin.sun@xxxxxxxxx>

Yes, this makes sense. No need to dirty a cacheline if we are already
over the threshold.

Acked-by: Shakeel Butt <shakeelb@xxxxxxxxxx>




[Index of Archives]     [Linux ARM Kernel]     [Linux ARM]     [Linux Omap]     [Fedora ARM]     [IETF Annouce]     [Security]     [Bugtraq]     [Linux OMAP]     [Linux MIPS]     [eCos]     [Asterisk Internet PBX]     [Linux API]     [Monitors]

  Powered by Linux