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873f64b791
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) Link: https://lkml.kernel.org/r/20220722164949.47760-1-jiebin.sun@intel.com Signed-off-by: Jiebin Sun <jiebin.sun@intel.com> Acked-by: Shakeel Butt <shakeelb@google.com> Reviewed-by: Roman Gushchin <roman.gushchin@linux.dev> Reviewed-by: Tim Chen <tim.c.chen@linux.intel.com> Acked-by: Muchun Song <songmuchun@bytedance.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@kernel.org> Cc: "Huang, Ying" <ying.huang@intel.com> Cc: Amadeusz Sawiski <amadeuszx.slawinski@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.