kernel/tools/perf/arch/arm64, branch linux-4.17.y

perf tools arm64: Add libdw DWARF post unwind support for ARM64

2018-03-16T16:53:46Z

Based on prior work: https://lkml.org/lkml/2014/5/6/395 and on how other arches add libdw unwind support. Includes support for running the unwind test, e.g., on a system with only elfutils' libdw 0.170, the test now runs, and successfully: $ ./perf test unwind 56: Test dwarf unwind : Ok Originally-by: Jean Pihet Reported-by: Christian Hansen Signed-off-by: Kim Phillips Cc: Alexander Shishkin Cc: Jiri Olsa Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20180308211030.4ee4a0d6ff6dc5cda1b567d4@arm.com Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Add ARM Statistical Profiling Extensions (SPE) support

2018-01-17T13:23:31Z

'perf record' and 'perf report --dump-raw-trace' supported in this release. Example usage: # perf record -e arm_spe/ts_enable=1,pa_enable=1/ dd if=/dev/zero of=/dev/null count=10000 # perf report --dump-raw-trace Note that the perf.data file is portable, so the report can be run on another architecture host if necessary. Output will contain raw SPE data and its textual representation, such as: 0x5c8 [0x30]: PERF_RECORD_AUXTRACE size: 0x200000 offset: 0 ref: 0x1891ad0e idx: 1 tid: 2227 cpu: 1 . . ... ARM SPE data: size 2097152 bytes . 00000000: 49 00 LD . 00000002: b2 c0 3b 29 0f 00 00 ff ff VA 0xffff00000f293bc0 . 0000000b: b3 c0 eb 24 fb 00 00 00 80 PA 0xfb24ebc0 ns=1 . 00000014: 9a 00 00 LAT 0 XLAT . 00000017: 42 16 EV RETIRED L1D-ACCESS TLB-ACCESS . 00000019: b0 00 c4 15 08 00 00 ff ff PC 0xff00000815c400 el3 ns=1 . 00000022: 98 00 00 LAT 0 TOT . 00000025: 71 36 6c 21 2c 09 00 00 00 TS 39395093558 . 0000002e: 49 00 LD . 00000030: b2 80 3c 29 0f 00 00 ff ff VA 0xffff00000f293c80 . 00000039: b3 80 ec 24 fb 00 00 00 80 PA 0xfb24ec80 ns=1 . 00000042: 9a 00 00 LAT 0 XLAT . 00000045: 42 16 EV RETIRED L1D-ACCESS TLB-ACCESS . 00000047: b0 f4 11 16 08 00 00 ff ff PC 0xff0000081611f4 el3 ns=1 . 00000050: 98 00 00 LAT 0 TOT . 00000053: 71 36 6c 21 2c 09 00 00 00 TS 39395093558 . 0000005c: 48 00 INSN-OTHER . 0000005e: 42 02 EV RETIRED . 00000060: b0 2c ef 7f 08 00 00 ff ff PC 0xff0000087fef2c el3 ns=1 . 00000069: 98 00 00 LAT 0 TOT . 0000006c: 71 d1 6f 21 2c 09 00 00 00 TS 39395094481 ... Other release notes: - applies to acme's perf/{core,urgent} branches, likely elsewhere - Report is self-contained within the tool. Record requires enabling the kernel SPE driver by setting CONFIG_ARM_SPE_PMU. - The intel-bts implementation was used as a starting point; its min/default/max buffer sizes and power of 2 pages granularity need to be revisited for ARM SPE - Recording across multiple SPE clusters/domains not supported - Snapshot support (record -S), and conversion to native perf events (e.g., via 'perf inject --itrace'), are also not supported - Technically both cs-etm and spe can be used simultaneously, however disabled for simplicity in this release Signed-off-by: Kim Phillips Reviewed-by: Dongjiu Geng Acked-by: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: Jiri Olsa Cc: linux-arm-kernel@lists.infradead.org Cc: Marc Zyngier Cc: Mark Rutland Cc: Mathieu Poirier Cc: Pawel Moll Cc: Peter Zijlstra Cc: Rob Herring Cc: Suzuki Poulouse Cc: Thomas Gleixner Cc: Wang Nan Cc: Will Deacon Link: http://lkml.kernel.org/r/20180114132850.0b127434b704a26bad13268f@arm.com Signed-off-by: Arnaldo Carvalho de Melo

perf probe arm64: Fix symbol fixup issues due to ELF type

2017-12-27T15:15:58Z

On an arm64 machine running a CONFIG_RANDOMIZE_BASE=y kernel, perf kernel symbol resolution fails. Debugging saw symsrc_init calling the default elf__needs_adjust_symbols() where checks for an ET_DYN (3) ehdr.e_type failed when they should have succeeded. Fix by adopting powerpc version of the weak elf__needs_adjust_symbols() function, as done in commit d2332098331f ("perf probe ppc: Fix symbol fixup issues due to ELF type"). Prior to this patch, perf test 1 would fail: $ sudo oldperf test -v 1 |& head 1: vmlinux symtab matches kallsyms : test child forked, pid 33374 Looking at the vmlinux_path (8 entries long) Using /usr/lib/debug/boot/vmlinux for symbols ERR : 0xfffe0000100f1000: do_undefinstr not on kallsyms ERR : 0xfffe0000100f1320: do_sysinstr not on kallsyms ERR : 0xfffe0000100f13b0: do_debug_exception not on kallsyms ERR : 0xfffe0000100f1498: do_mem_abort not on kallsyms ERR : 0xfffe0000100f1580: do_sp_pc_abort not on kallsyms ... After applying this patch, perf test 1 now succeeds: $ sudo ./newperf test -v 1 |& head 1: vmlinux symtab matches kallsyms : test child forked, pid 33378 Looking at the vmlinux_path (8 entries long) Using /usr/lib/debug/boot/vmlinux for symbols WARN: 0xffff000008081000: diff name v: do_undefinstr k: __exception_text_start WARN: 0xffff0000080819e8: diff name v: __irqentry_text_end k: __softirqentry_text_start WARN: 0xffff000008081d08: diff name v: __entry_text_start k: __softirqentry_text_end WARN: 0xffff00000809db5c: diff name v: flush_icache_range k: __flush_cache_user_range WARN: 0xffff000008101908: diff name v: sys_ni_syscall k: sys_vm86old ... Signed-off-by: Kim Phillips Cc: Alexander Shishkin Cc: Ganapatrao Kulkarni Cc: Jiri Olsa Cc: Namhyung Kim Cc: Naveen N. Rao Cc: Peter Zijlstra Cc: Will Deacon Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/20171214175242.e30450f17f93ad675d968fa3@arm.com Signed-off-by: Arnaldo Carvalho de Melo

perf tools arm64: Add support for get_cpuid_str function.

2017-12-05T13:24:33Z

The get_cpuid_str function returns the MIDR string of the first online cpu from the range of cpus associated with the PMU CORE device. Signed-off-by: Ganapatrao Kulkarni Acked-by: Will Deacon Cc: Alexander Shishkin Cc: Catalin Marinas Cc: Ganapatrao Kulkarni Cc: Jayachandran C Cc: Jonathan Cameron Cc: Mark Rutland Cc: Peter Zijlstra Cc: Robert Richter Cc: Shaokun Zhang Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/20171016183222.25750-3-ganapatrao.kulkarni@cavium.com Signed-off-by: Arnaldo Carvalho de Melo

Merge branch 'linus' into perf/core, to fix conflicts

2017-11-07T09:30:18Z

Conflicts: tools/perf/arch/arm/annotate/instructions.c tools/perf/arch/arm64/annotate/instructions.c tools/perf/arch/powerpc/annotate/instructions.c tools/perf/arch/s390/annotate/instructions.c tools/perf/arch/x86/tests/intel-cqm.c tools/perf/ui/tui/progress.c tools/perf/util/zlib.c Signed-off-by: Ingo Molnar

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02T10:10:55Z

Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart Reviewed-by: Philippe Ombredanne Reviewed-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman

perf annotate: Remove arch::cpuid_parse callback

2017-10-23T14:20:54Z

There's no need for extra cpuid_parse arch callback, it can be handled directly in init callback. Adding the init function to x86 to cover the cpuid initialization. Signed-off-by: Jiri Olsa Cc: Andi Kleen Cc: David Ahern Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20171011150158.11895-2-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf annotate: Fix AArch64 comment char

2017-05-04T13:03:00Z

The commit 0fcb1da4aba "perf annotate: AArch64 support" blindly copied the comment character from the original: https://lkml.org/lkml/2016/5/19/461 whereas that same commit shows objdump output utilizing the C++ style "//" as the comment delimeter. Since '/' doesn't occur elsewhere in objdump output, we retain the single character check, but fix it to be '/'. Signed-off-by: Kim Phillips Cc: Alexander Shishkin Cc: Chris Riyder Cc: Peter Zijlstra Fixes: 0fcb1da4aba6 ("perf annotate: AArch64 support") Link: http://lkml.kernel.org/r/20170503131356.be88f977094fb3fa0f49b99d@arm.com Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Remove string.h, unistd.h and sys/stat.h from util.h

2017-04-24T16:43:33Z

Not needed in this header, added to the places that need FILE, putchar(), access() and a few other prototypes. Link: http://lkml.kernel.org/n/tip-xxtdsl6nsna82j7puwbdjqhs@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Include errno.h where needed

2017-04-19T16:01:51Z

Removing it from util.h, part of an effort to disentangle the includes hell, that makes changes to util.h or something included by it to cause a complete rebuild of the tools. Cc: Adrian Hunter Cc: David Ahern Cc: Jiri Olsa Cc: Namhyung Kim Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-ztrjy52q1rqcchuy3rubfgt2@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo