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d38461e977
add_default_atttributes would add evsels by having pre-created perf_event_attr, however, this needed fixing for hybrid as the extended PMU type was necessary for each core PMU. The logic for this was in an arch specific x86 function and wasn't present for ARM, meaning that default events weren't being opened on all PMUs on ARM. Change the creation of the default events to use parse_events and strings as that will open the events on all PMUs. Rather than try to detect events on PMUs before parsing, parse the event but skip its output in stat-display. The previous order of hardware events was: cycles, stalled-cycles-frontend, stalled-cycles-backend, instructions. As instructions is a more fundamental concept the order is changed to: instructions, cycles, stalled-cycles-frontend, stalled-cycles-backend. Closes: https://lore.kernel.org/lkml/CAP-5=fVABSBZnsmtRn1uF-k-G1GWM-L5SgiinhPTfHbQsKXb_g@mail.gmail.com/ Acked-by: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Ian Rogers <irogers@google.com> [Don't display unsupported default events except 'cycles'] Acked-by: Kan Liang <kan.liang@linux.intel.com> Signed-off-by: James Clark <james.clark@linaro.org> Cc: Yang Jihong <yangjihong@bytedance.com> Cc: Dominique Martinet <asmadeus@codewreck.org> Cc: Colin Ian King <colin.i.king@gmail.com> Cc: Howard Chu <howardchu95@gmail.com> Cc: Ze Gao <zegao2021@gmail.com> Cc: Yicong Yang <yangyicong@hisilicon.com> Cc: Weilin Wang <weilin.wang@intel.com> Cc: Will Deacon <will@kernel.org> Cc: Mike Leach <mike.leach@linaro.org> Cc: Jing Zhang <renyu.zj@linux.alibaba.com> Cc: Yang Li <yang.lee@linux.alibaba.com> Cc: Leo Yan <leo.yan@linux.dev> Cc: ak@linux.intel.com Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com> Cc: linux-arm-kernel@lists.infradead.org Cc: Sun Haiyong <sunhaiyong@loongson.cn> Cc: John Garry <john.g.garry@oracle.com> Link: https://lore.kernel.org/r/20240926144851.245903-4-james.clark@linaro.org Signed-off-by: Namhyung Kim <namhyung@kernel.org> |
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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 reStructuredText 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.