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CONFIG_CIFS_STATS2 can be very useful since it shows latencies by command, and allows enabling the slow response dynamic tracepoint which can be useful to identify performance problems. For example: Total time spent processing by command. Time units are jiffies (1000 per second) SMB3 CMD Number Total Time Fastest Slowest -------- ------ ---------- ------- ------- 0 1 2 2 2 1 2 6 2 4 2 0 0 0 0 3 4 11 2 4 4 2 16 5 11 5 4546 34104 2 487 6 4421 32901 2 487 7 0 0 0 0 8 695 2781 2 39 9 391 1708 2 27 10 0 0 0 0 11 4 6 1 2 12 0 0 0 0 13 0 0 0 0 14 3887 17696 0 128 15 0 0 0 0 16 1471 9950 1 487 17 169 2695 9 116 18 80 381 2 10 1 2 6 2 4 2 0 0 0 0 3 4 11 2 4 4 2 16 5 11 5 4546 34104 2 487 6 4421 32901 2 487 7 0 0 0 0 8 695 2781 2 39 9 391 1708 2 27 10 0 0 0 0 11 4 6 1 2 12 0 0 0 0 13 0 0 0 0 14 3887 17696 0 128 15 0 0 0 0 16 1471 9950 1 487 17 169 2695 9 116 18 80 381 2 10 Reviewed-by: Aurelien Aptel <aaptel@suse.com> Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz> Signed-off-by: Steve French <stfrench@microsoft.com> |
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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.