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Top-Down Microarchitecture Analysis (TMA) metrics simplify cycle-accounting using microarchitecture-abstracted metrics organized in one hierarchy. This update is from version 4.5 to 4.7. The update includes: - tma_info_bottleneck* metrics, an abstraction or summarization of the 100+ TMA tree nodes into 12-entry familiar performance metrics. - Reduce number of events (multiplexing) for tma_info_system_gflops, tma_info_core_flopc, tma_info_inst_mix_ipflop and tma_ports_utilized_0. - Fixes for tma_info_bottleneck_mispredictions and tma_info_bad_spec_branch_misprediction_cost. - New tma_info_inst_mix_ippause metric. - tma_serializing_operation is raised to level 3. - Swapped tma_info_core_ilp (becomes per SMT thread) and tma_info_pipeline_execute (per physical core). - tma_nop_instructions and tma_shuffles_256b are lowered to level 4 under tma_other_light_ops_group. - Reduced number of events when SMT is off. - Tuned thresholds for tma_info_bottleneck_branching_overhead, tma_fetch_bandwidth and tma_ports_utilized_3m. The update came from: https://github.com/intel/perfmon/pull/140 https://github.com/intel/perfmon/pull/138 Running the script: https://github.com/intel/perfmon/blob/main/scripts/create_perf_json.py Signed-off-by: Ian Rogers <irogers@google.com> Reviewed-by: Kan Liang <kan.liang@linux.intel.com> Cc: Stephane Eranian <eranian@google.com> Cc: Caleb Biggers <caleb.biggers@intel.com> Cc: Edward Baker <edward.baker@intel.com> Cc: Perry Taylor <perry.taylor@intel.com> Cc: Samantha Alt <samantha.alt@intel.com> Cc: Weilin Wang <weilin.wang@intel.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Link: https://lore.kernel.org/r/20240214011820.644458-22-irogers@google.com |
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| kernel | ||
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| README | ||
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.