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2145e77fec
The new PEBS Record Format 5 is similar to the PEBS Record Format 4. The only difference is the layout of the Counter Reset fields of the PEBS Config Buffer in the DS area. For the PEBS format 4, the Counter Reset fields allocation is for 8 general-purpose counters followed by 4 fixed-function counters. For the PEBS format 5, the Counter Reset fields allocation is for 32 general-purpose counters followed by 16 fixed-function counters. Extend the MAX_PEBS_EVENTS to 32. Add MAX_PEBS_EVENTS_FMT4 for the previous platform. Except for the DS auto-reload code, other places already assume 32 counters. Only check the PEBS_FMT in the DS auto-reload code. Extend the MAX_FIXED_PEBS_EVENTS to 16, which only impacts the size of struct debug_store and some local temporary variables. The size of struct debug_store increases 288B, which is small and should be acceptable. Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/1643750603-100733-1-git-send-email-kan.liang@linux.intel.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.