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The hist__account_cycles() can account cycles per basic block. The basic block information is saved in cycles_hist structure. This patch processes each symbol, get basic blocks from cycles_hist and add the basic block entries to a new hists (in 'struct block_hist'). Using a hists is because we need to compare, sort and print the basic blocks later. v6: --- Since 'ops' argument is removed from hists__add_entry_block, update the code accordingly. No functional change. v5: --- Since now we still carry block_info in 'struct hist_entry' we don't need to use our own new/free ops for hist entries. And the block_info is released in hist_entry__delete. v3: --- 1. In v2, we put block stuffs in 'struct hist_entry', but it's not a good design. In v3, we create a new 'struct block_hist' and cast the 'struct hist_entry' to 'struct block_hist' in some places, which can avoid adding new stuffs in 'struct hist_entry'. 2. abs() -> labs(), in block_cycles_diff_cmp(). v2: --- v1 adds the basic block entries to per data-file hists but v2 adds the basic block entries to per symbol hists. That is to keep current perf-diff format. Will show the result in next patches. Signed-off-by: Jin Yao <yao.jin@linux.intel.com> Reviewed-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jin Yao <yao.jin@intel.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1561713784-30533-5-git-send-email-yao.jin@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.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.