commit | 59cfdaba64e39790945395f33e6952f8ef887ed7 | [log] [tgz] |
---|---|---|
author | Anshuman Khandual <anshuman.khandual@arm.com> | Wed Aug 24 10:18:20 2022 +0530 |
committer | Quentin Monnet <qmonnet+github@qoba.lt> | Mon Nov 21 21:16:24 2022 +0000 |
tree | 692c3525a79d93ae0f542de1e9b87969f19cf796 | |
parent | 6462b5fcd9e9ad58a5cc4aa88a90492ae6051e10 [diff] |
perf branch: Extend branch type classification This updates the perf tool with generic branch type classification with new ABI extender place holder i.e PERF_BR_EXTEND_ABI, the new 4 bit branch type field i.e perf_branch_entry.new_type, new generic page fault related branch types and some arch specific branch types as added earlier in the kernel. Committer note: Add an extra entry to the branch_type_name array to cope with PERF_BR_EXTEND_ABI, to address build warnings on some compiler/systems, like: 75 8.89 ubuntu:20.04-x-powerpc64el : FAIL gcc version 10.3.0 (Ubuntu 10.3.0-1ubuntu1~20.04) inlined from 'branch_type_stat_display' at util/branch.c:152:4: /usr/powerpc64le-linux-gnu/include/bits/stdio2.h:100:10: error: '%8s' directive argument is null [-Werror=format-overflow=] 100 | return __fprintf_chk (__stream, __USE_FORTIFY_LEVEL - 1, __fmt, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 101 | __va_arg_pack ()); | ~~~~~~~~~~~~~~~~~ Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@arm.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Suzuki Poulouse <suzuki.poulose@arm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Will Deacon <will@kernel.org> Cc: linux-arm-kernel@lists.infradead.org Link: https://lore.kernel.org/r/20220824044822.70230-7-anshuman.khandual@arm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This is a mirror of bpf-next Linux source tree's tools/bpf/bpftool
directory, plus its few dependencies from under kernel/bpf/
, and its supporting header files.
All the gory details of syncing can be found in scripts/sync-kernel.sh
script.
Some header files in this repo (include/linux/*.h
) are reduced versions of their counterpart files at bpf-next's tools/include/linux/*.h
to make compilation successful.
Please check out the manual pages for documentation about bpftool. A number of example invocations are also displayed in this blog post.
All general BPF questions, including kernel functionality, bpftool features and usage, should be sent to bpf@vger.kernel.org mailing list. You can subscribe to it here and search its archive here. Please search the archive before asking new questions. It very well might be that this was already addressed or answered before.
bpf@vger.kernel.org is monitored by many more people and they will happily try to help you with whatever issue you have. This repository's PRs and issues should be opened only for dealing with issues pertaining to specific way this bpftool mirror repo is set up and organized.
Required:
Optional:
This repository uses libbpf as a submodule. You can initialize it when cloning bpftool:
$ git clone --recurse-submodules https://github.com/libbpf/bpftool.git
Alternatively, if you have already cloned the repository, you can initialize the submodule by running the following command from within the repository:
$ git submodule update --init
To build bpftool:
$ cd src
$ make
To build and install bpftool on the system:
$ cd src # make install
Building bpftool in a separate directory is supported via the OUTPUT
variable:
$ mkdir /tmp/bpftool $ cd src $ OUTPUT=/tmp/bpftool make
Most of the output is suppressed by default, but detailed building logs can be displayed by passing V=1
:
$ cd src $ make V=1
Additional CFLAGS
can be passed to the command line if required. For example, we can create a static build with the following commands (but note that this does not work out-of-the-box when linking with libbfd):
$ cd src $ CFLAGS=--static make
The man pages for bpftool can be built with:
$ cd docs
$ make
They can be installed on the system with:
$ cd docs # make install
This work is dual-licensed under the GNU GPL v2.0 (only) license and the BSD 2-clause license. You can choose between one of them if you use this work.
SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)