kernel/linux.git/tools/perf/util/util.h, branch v6.18.22

perf util: Remove kernel version deadcode

2024-11-16T19:30:39+00:00

fetch_kernel_version() has been unused since Ian's 2023 commit 3d6dfae889174340 ("perf parse-events: Remove BPF event support") Remove it, and it's helpers. I noticed there are a bunch of kernel-version macros that are also unused nearby. Also remove them. Reviewed-by: Ian Rogers Signed-off-by: Dr. David Alan Gilbert Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Ingo Molnar Cc: Jiri Olsa Cc: Kan Liang Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Link: https://lore.kernel.org/r/20241116155850.113129-1-linux@treblig.org Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Don't set attr.exclude_guest by default

2024-10-22T16:52:11+00:00

The exclude_guest in the event attribute is to limit profiling in the host environment. But I'm not sure why we want to set it by default cause we don't care about it in most cases and I feel like it just makes new PMU implementation complicated. Of course it's useful for perf kvm command so I added the exclude_GH_default variable to preserve the old behavior for perf kvm and other commands like perf record and stat won't set the exclude bit. This is helpful for AMD IBS case since having exclude_guest bit will clear new feature bit due to the missing feature check logic. $ sysctl kernel.perf_event_paranoid kernel.perf_event_paranoid = 0 $ perf record -W -e ibs_op// -vv true 2>&1 | grep switching switching off PERF_FORMAT_LOST support switching off weight struct support switching off bpf_event switching off ksymbol switching off cloexec flag switching off mmap2 switching off exclude_guest, exclude_host Intestingly, I found it sets the exclude_bit if "u" modifier is used. I don't know why but it's neither intuitive nor consistent. Let's remove the bit there too. Reviewed-by: Ian Rogers Reviewed-by: James Clark Reviewed-by: Ravi Bangoria Acked-by: Kan Liang Cc: James Clark Cc: Atish Patra Cc: Mingwei Zhang Cc: Kajol Jain Cc: Thomas Richter Cc: Palmer Dabbelt Link: https://lore.kernel.org/r/20241016062359.264929-3-namhyung@kernel.org Signed-off-by: Namhyung Kim

perf test: Remove C test wrapper for attr.py

2024-10-17T20:17:36+00:00

Remove the C wrapper now a shell script wrapper exists. Move perf_event_attr dumping functions to evsel.c and reduce the scope of variables/defines. Use fprintf to avoid snprintf complexities in WRITE_ASS. Add __SANE_USERSPACE_TYPES__ to evsel.c to fix format flag issues on PowerPC triggered by moving attr.c functions to evsel.c. Signed-off-by: Ian Rogers Tested-by: Athira Rajeev Cc: Stephen Rothwell Cc: zhaimingbing Cc: Howard Chu Cc: Ze Gao Cc: Weilin Wang Cc: James Clark Cc: Leo Yan Cc: Thomas Richter Cc: Veronika Molnarova Link: https://lore.kernel.org/r/20241015000158.871828-3-irogers@google.com Signed-off-by: Namhyung Kim

perf list: Add scandirat compatibility function

2024-02-22T17:11:41+00:00

scandirat is used during the printing of tracepoint events but may be missing from certain libcs. Add a compatibility implementation that uses the symlink of an fd in /proc as a path for the reliably present scandir. Signed-off-by: Ian Rogers Cc: James Clark Cc: Justin Stitt Cc: Bill Wendling Cc: Nick Desaulniers Cc: Yang Jihong Cc: Nathan Chancellor Cc: Kan Liang Cc: Athira Jajeev Cc: llvm@lists.linux.dev Signed-off-by: Namhyung Kim Link: https://lore.kernel.org/r/20240221034155.1500118-3-irogers@google.com

perf util: Move perf_guest/host declarations

2023-04-10T22:22:05+00:00

The definitions are in util.c so move the declarations to match. Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Athira Rajeev Cc: Chengdong Li Cc: Denis Nikitin Cc: Florian Fischer Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: John Garry Cc: Kan Liang Cc: Leo Yan Cc: Mark Rutland Cc: Martin Liška Cc: Mathieu Poirier Cc: Mike Leach Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Raul Silvera Cc: Ravi Bangoria Cc: Rob Herring Cc: Sean Christopherson Cc: Suzuki Poulouse Cc: Will Deacon Cc: Xing Zhengjun Cc: coresight@lists.linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: https://lore.kernel.org/r/20230410162511.3055900-2-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf util: Move input_name to util

2023-04-10T22:21:31+00:00

'input_name' is the name of the input perf.data file, it is used by data convert and ui code. Move it to util to make it more consistent with other global state. Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Athira Rajeev Cc: Chengdong Li Cc: Denis Nikitin Cc: Florian Fischer Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: John Garry Cc: Kan Liang Cc: Leo Yan Cc: Mark Rutland Cc: Martin Liška Cc: Mathieu Poirier Cc: Mike Leach Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Raul Silvera Cc: Ravi Bangoria Cc: Rob Herring Cc: Sean Christopherson Cc: Suzuki Poulouse Cc: Will Deacon Cc: Xing Zhengjun Cc: coresight@lists.linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: https://lore.kernel.org/r/20230410162511.3055900-2-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf usage: Move usage strings

2023-04-10T22:20:53+00:00

The usage function is part of util.h, move the usage strings there too. Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Athira Rajeev Cc: Chengdong Li Cc: Denis Nikitin Cc: Florian Fischer Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: John Garry Cc: Kan Liang Cc: Leo Yan Cc: Mark Rutland Cc: Martin Liška Cc: Mathieu Poirier Cc: Mike Leach Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Raul Silvera Cc: Ravi Bangoria Cc: Rob Herring Cc: Sean Christopherson Cc: Suzuki Poulouse Cc: Will Deacon Cc: Xing Zhengjun Cc: coresight@lists.linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: https://lore.kernel.org/r/20230410162511.3055900-2-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf util: Add host_is_bigendian to util.h

2022-12-14T14:16:12+00:00

Avoid libtraceevent dependency for tep_is_bigendian or trace-event.h dependency for bigendian. Add a new host_is_bigendian to util.h, using the compiler defined __BYTE_ORDER__ when available. Committer notes: Added: #else /* !__BYTE_ORDER__ */ On that nested #ifdef block, as per Namhyung's suggestion. Signed-off-by: Ian Rogers Acked-by: Namhyung Kim Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Ingo Molnar Cc: Jiri Olsa Cc: Kan Liang Cc: Leo Yan Cc: Mark Rutland Cc: Masami Hiramatsu Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Steven Rostedt (VMware) Link: https://lore.kernel.org/r/20221130062935.2219247-3-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf util: Make header guard consistent with tool

2022-12-14T14:16:12+00:00

Remove git reference by changing GIT_COMPAT_UTIL_H to __PERF_UTIL_H. Signed-off-by: Ian Rogers Acked-by: Namhyung Kim Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Ingo Molnar Cc: Jiri Olsa Cc: Kan Liang Cc: Leo Yan Cc: Mark Rutland Cc: Masami Hiramatsu Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Steven Rostedt (VMware) Link: https://lore.kernel.org/r/20221130062935.2219247-2-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Add reallocarray_as_needed()

2022-07-20T14:08:37+00:00

Add helper reallocarray_as_needed() to reallocate an array to a larger size and initialize the extra entries to an arbitrary value. Signed-off-by: Adrian Hunter Cc: Andi Kleen Cc: Ian Rogers Cc: Jiri Olsa Cc: Namhyung Kim Cc: kvm@vger.kernel.org Link: https://lore.kernel.org/r/20220711093218.10967-24-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo