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Davide Caratti says: ==================== net/sched: act_police: lockless data path the data path of 'police' action can be faster if we avoid using spinlocks: - patch 1 converts act_police to use per-cpu counters - patch 2 lets act_police use RCU to access its configuration data. test procedure (using pktgen from https://github.com/netoptimizer): # ip link add name eth1 type dummy # ip link set dev eth1 up # tc qdisc add dev eth1 clsact # tc filter add dev eth1 egress matchall action police \ > rate 2gbit burst 100k conform-exceed pass/pass index 100 # for c in 1 2 4; do > ./pktgen_bench_xmit_mode_queue_xmit.sh -v -s 64 -t $c -n 5000000 -i eth1 > done test results (avg. pps/thread): $c | before patch | after patch | improvement ----+--------------+--------------+------------- 1 | 3518448 | 3591240 | irrelevant 2 | 3070065 | 3383393 | 10% 4 | 1540969 | 3238385 | 110% ==================== Signed-off-by: David S. Miller <davem@davemloft.net> |
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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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.