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Turbostat works by taking a snapshot of counters, sleeping, taking another snapshot, calculating deltas, and printing out the table. The sleep time is controlled via -i option or by user sending a signal or a character to stdin. In the latter case, turbostat always adds 1 ms sleep before it reads the counters, in order to avoid larger imprecisions in the results in prints. While the 1 ms delay may be a good idea for a "dumb" user, it is a problem for an "aware" user. I do thousands and thousands of measurements over a short period of time (like 2ms), and turbostat unconditionally adds a 1ms to my interval, so I cannot get what I really need. This patch removes the unconditional 1ms sleep. This is an expert user tool, after all, and non-experts will unlikely ever use it in the non-fixed interval mode anyway, so I think it is OK to remove the 1ms delay. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
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.