kernel.git/tools/perf/arch/arm64, branch linux-6.5.y

perf pmu: Remove logic for PMU name being NULL

2023-11-20T10:57:16Z

[ Upstream commit c091ee90897aacf60aee510464cfc28b4041186f ] The PMU name could be NULL in the case of the fake_pmu. Initialize the name for the fake_pmu to "fake" so that all other logic can assume it is initialized. Add a const to the type of name so that a literal can be used to avoid additional initialization code. Propagate the cost through related routines and remove now unnecessary "(char *)" casts. Doing this located a bug in builtin-list for the pmu_glob that was missing a strdup. Signed-off-by: Ian Rogers Link: https://lore.kernel.org/r/20230825024002.801955-3-irogers@google.com Cc: K Prateek Nayak Cc: Ravi Bangoria Cc: James Clark Cc: Mark Rutland Cc: Suzuki Poulouse Cc: Sean Christopherson Cc: Wei Li Cc: Peter Zijlstra Cc: Adrian Hunter Cc: Arnaldo Carvalho de Melo Cc: Huacai Chen Cc: Jiri Olsa Cc: Namhyung Kim Cc: Will Deacon Cc: Leo Yan Cc: Mike Leach Cc: Kajol Jain Cc: Alexander Shishkin Cc: Kan Liang Cc: Athira Rajeev Cc: linux-arm-kernel@lists.infradead.org Cc: Ming Wang Cc: John Garry Cc: Ingo Molnar Cc: linux-kernel@vger.kernel.org Cc: linux-perf-users@vger.kernel.org Signed-off-by: Arnaldo Carvalho de Melo Stable-dep-of: 85f73c377b2a ("perf mem-events: Avoid uninitialized read") Signed-off-by: Sasha Levin

perf pmu arm64: Fix reading the PMU cpu slots in sysfs

2023-07-24T16:40:52Z

Commit f8ad6018ce3c065a ("perf pmu: Remove duplication around EVENT_SOURCE_DEVICE_PATH") uses sysfs__read_ull() to read a full sysfs path, which will never succeeds as it already comes with the sysfs mount point in it, which sysfs__read_ull() will add again. Fix it by reading the file using filename__read_ull(), that will not add the sysfs mount point. Fixes: f8ad6018ce3c065a ("perf pmu: Remove duplication around EVENT_SOURCE_DEVICE_PATH") Signed-off-by: Haixin Yu Tested-by: Jing Zhang Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Ian Rogers Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: John Garry Cc: Leo Yan Cc: Mark Rutland Cc: Mike Leach Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Will Deacon Cc: linux-arm-kernel@lists.infradead.org Link: https://lore.kernel.org/r/ZL4G7rWXkfv-Ectq@B-Q60VQ05P-2326.local Signed-off-by: Arnaldo Carvalho de Melo

perf thread: Add accessor functions for thread

2023-06-12T18:57:53Z

Using accessors will make it easier to add reference count checking in later patches. Committer notes: thread->nsinfo wasn't wrapped as it is used together with nsinfo__zput(), where does a trick to set the field with a refcount being dropped to NULL, and that doesn't work well with using thread__nsinfo(thread), that loses the &thread->nsinfo pointer. When refcount checking is added to 'struct thread', later in this series, nsinfo__zput(RC_CHK_ACCESS(thread)->nsinfo) will be used to check the thread pointer. Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Ali Saidi Cc: Andi Kleen Cc: Athira Rajeev Cc: Brian Robbins Cc: Changbin Du Cc: Dmitrii Dolgov <9erthalion6@gmail.com> Cc: Fangrui Song Cc: German Gomez Cc: Ingo Molnar Cc: Ivan Babrou Cc: James Clark Cc: Jing Zhang Cc: Jiri Olsa Cc: John Garry Cc: K Prateek Nayak Cc: Kan Liang Cc: Leo Yan Cc: Liam Howlett Cc: Mark Rutland Cc: Miguel Ojeda Cc: Mike Leach Cc: Namhyung Kim Cc: Naveen N. Rao Cc: Peter Zijlstra Cc: Ravi Bangoria Cc: Sean Christopherson Cc: Steinar H. Gunderson Cc: Suzuki Poulouse Cc: Wenyu Liu Cc: Will Deacon Cc: Yang Jihong Cc: Ye Xingchen Cc: Yuan Can Cc: coresight@lists.linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: https://lore.kernel.org/r/20230608232823.4027869-4-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf arm64: Use max_nr to define SYSCALLTBL_ARM64_MAX_ID

2023-06-05T14:43:04Z

Like x86, powerpc, mips and s390, use max_nr which is a digital number to define SYSCALLTBL_ARM64_MAX_ID. Reviewed-by: Huacai Chen Signed-off-by: Tiezhu Yang Acked-by: Ian Rogers Cc: Ingo Molnar Cc: Peter Zijlstra Cc: loongarch@lists.linux.dev Link: https://lore.kernel.org/r/1685441401-8709-5-git-send-email-yangtiezhu@loongson.cn Signed-off-by: Arnaldo Carvalho de Melo

perf arm64: Handle __NR3264_ prefixed syscall number

2023-06-05T14:37:05Z

After commit 9854e7ad35fe ("perf arm64: Simplify mksyscalltbl"), in the generated syscall table file syscalls.c, there exist some __NR3264_ prefixed syscall numbers such as [__NR3264_ftruncate], it looks like not so good, just do some small filter operations to handle __NR3264_ prefixed syscall number as a digital number. Without this patch: [__NR3264_ftruncate] = "ftruncate", With this patch: [46] = "ftruncate", Suggested-by: Alexander Kapshuk Reviewed-by: Huacai Chen Reviewed-by: Leo Yan Signed-off-by: Tiezhu Yang Acked-by: Ian Rogers Cc: Ingo Molnar Cc: Peter Zijlstra Cc: loongarch@lists.linux.dev Link: https://lore.kernel.org/r/1685441401-8709-4-git-send-email-yangtiezhu@loongson.cn Signed-off-by: Arnaldo Carvalho de Melo

perf arm64: Rename create_table_from_c() to create_sc_table()

2023-06-05T14:36:38Z

After commit 9854e7ad35fecf30 ("perf arm64: Simplify mksyscalltbl") it has been removed the temporary C program and used shell to generate syscall table, so let us rename create_table_from_c() to create_sc_table() to avoid confusion. Suggested-by: Leo Yan Reviewed-by: Huacai Chen Signed-off-by: Tiezhu Yang Acked-by: Ian Rogers Cc: Ingo Molnar Cc: Peter Zijlstra Cc: loongarch@lists.linux.dev Link: https://lore.kernel.org/r/1685441401-8709-3-git-send-email-yangtiezhu@loongson.cn Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Declare syscalltbl_*[] as const for all archs

2023-06-05T14:36:17Z

syscalltbl_*[] should never be changing, let us declare it as const. Suggested-by: Ian Rogers Reviewed-by: Huacai Chen Signed-off-by: Tiezhu Yang Acked-by: Ian Rogers Cc: Ingo Molnar Cc: Peter Zijlstra Cc: loongarch@lists.linux.dev Link: https://lore.kernel.org/r/1685441401-8709-2-git-send-email-yangtiezhu@loongson.cn Signed-off-by: Arnaldo Carvalho de Melo

perf pmus: Allow just core PMU scanning

2023-05-27T12:42:00Z

Scanning all PMUs is expensive as all PMUs sysfs entries are loaded, benchmarking shows more than 4x the cost: ``` $ perf bench internals pmu-scan -i 1000 Computing performance of sysfs PMU event scan for 1000 times Average core PMU scanning took: 989.231 usec (+- 1.535 usec) Average PMU scanning took: 4309.425 usec (+- 74.322 usec) ``` Add new perf_pmus__scan_core routine that scans just core PMUs. Replace perf_pmus__scan calls with perf_pmus__scan_core when non-core PMUs are being ignored. Reviewed-by: Kan Liang Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Ali Saidi Cc: Athira Rajeev Cc: Dmitrii Dolgov <9erthalion6@gmail.com> Cc: Huacai Chen Cc: Ingo Molnar Cc: James Clark Cc: Jing Zhang Cc: Jiri Olsa Cc: John Garry Cc: Kajol Jain Cc: Kang Minchul Cc: Leo Yan Cc: Madhavan Srinivasan Cc: Mark Rutland Cc: Mike Leach Cc: Ming Wang Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Ravi Bangoria Cc: Rob Herring Cc: Sandipan Das Cc: Sean Christopherson Cc: Suzuki Poulouse Cc: Thomas Richter Cc: Will Deacon Cc: Xing Zhengjun Cc: coresight@lists.linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: https://lore.kernel.org/r/20230527072210.2900565-30-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf pmu: Separate pmu and pmus

2023-05-27T12:41:39Z

Separate and hide the pmus list in pmus.[ch]. Move pmus functionality out of pmu.[ch] into pmus.[ch] renaming pmus functions which were prefixed perf_pmu__ to perf_pmus__. Reviewed-by: Kan Liang Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Ali Saidi Cc: Athira Rajeev Cc: Dmitrii Dolgov <9erthalion6@gmail.com> Cc: Huacai Chen Cc: Ingo Molnar Cc: James Clark Cc: Jing Zhang Cc: Jiri Olsa Cc: John Garry Cc: Kajol Jain Cc: Kang Minchul Cc: Leo Yan Cc: Madhavan Srinivasan Cc: Mark Rutland Cc: Mike Leach Cc: Ming Wang Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Ravi Bangoria Cc: Rob Herring Cc: Sandipan Das Cc: Sean Christopherson Cc: Suzuki Poulouse Cc: Thomas Richter Cc: Will Deacon Cc: Xing Zhengjun Cc: coresight@lists.linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: https://lore.kernel.org/r/20230527072210.2900565-28-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf arm64: Fix build with refcount checking

2023-05-10T17:39:10Z

With EXTRA_CFLAGS=-DREFCNT_CHECKING=1 and build-test, some unwrapped map accesses appear. Wrap it in the new accessor to fix the error: error: 'struct perf_cpu_map' has no member named 'map' Signed-off-by: James Clark Acked-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Ingo Molnar Cc: Jiri Olsa Cc: John Garry Cc: Leo Yan Cc: Mark Rutland Cc: Mike Leach Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Will Deacon Cc: linux-arm-kernel@lists.infradead.org Link: https://lore.kernel.org/r/20230504160845.2065510-1-james.clark@arm.com Signed-off-by: Arnaldo Carvalho de Melo