Changes in Build

6f8e8add - perf arm64: Remove dwarf-regs.c

Fri, 08 Nov 2024 23:45:53 +0000

perf arm64: Remove dwarf-regs.cThe file just provides the function get_arch_regstr, however, if inthe only caller get_dwarf_regstr EM_HOST is used for the EM_NONE casethe function can never be called. So remove as dead code. Tidy up theEM_NONE cases for arm64 in dwarf-regs.c.Reviewed-by: Masami Hiramatsu (Google) Signed-off-by: Ian Rogers Acked-by: Masami Hiramatsu (Google) Cc: Anup Patel Cc: Yang Jihong Cc: Palmer Dabbelt Cc: David S. Miller Cc: Albert Ou Cc: Shenlin Liang Cc: Nick Terrell Cc: Guilherme Amadio Cc: Steinar H. Gunderson Cc: Changbin Du Cc: Alexander Lobakin Cc: Przemek Kitszel Cc: Huacai Chen Cc: Guo Ren Cc: Masahiro Yamada Cc: Will Deacon Cc: James Clark Cc: Mike Leach Cc: Chen Pei Cc: Leo Yan Cc: Oliver Upton Cc: Aditya Gupta Cc: Kajol Jain Cc: Athira Rajeev Cc: linux-arm-kernel@lists.infradead.orgCc: linux-riscv@lists.infradead.orgCc: Bibo Mao Cc: John Garry Cc: Atish Patra Cc: Dima Kogan Cc: Paul Walmsley Cc: Dr. David Alan Gilbert Cc: linux-csky@vger.kernel.orgLink: https://lore.kernel.org/r/20241108234606.429459-9-irogers@google.comSigned-off-by: Namhyung Kim List of files: /linux-6.15/tools/perf/arch/arm64/util/Build

5455d89b - perf build: Rename CONFIG_DWARF to CONFIG_LIBDW

Thu, 17 Oct 2024 00:13:54 +0000

perf build: Rename CONFIG_DWARF to CONFIG_LIBDWIn Makefile.config for unwinding the name dwarf implies eitherlibunwind or libdw. Make it clearer that CONFIG_DWARF is really justdefined when libdw is present by renaming to CONFIG_LIBDW.Signed-off-by: Ian Rogers Acked-by: Namhyung Kim Tested-by: Leo Yan Cc: Anup Patel Cc: Yang Jihong Cc: Palmer Dabbelt Cc: David S. Miller Cc: Albert Ou Cc: Shenlin Liang Cc: Nick Terrell Cc: Guilherme Amadio Cc: Steinar H. Gunderson Cc: Changbin Du Cc: Alexander Lobakin Cc: Przemek Kitszel Cc: Huacai Chen Cc: Guo Ren Cc: Masahiro Yamada Cc: Masami Hiramatsu (Google) Cc: Will Deacon Cc: James Clark Cc: Mike Leach Cc: Chen Pei Cc: Leo Yan Cc: Oliver Upton Cc: Aditya Gupta Cc: Kajol Jain Cc: Athira Rajeev Cc: linux-arm-kernel@lists.infradead.orgCc: linux-riscv@lists.infradead.orgCc: Bibo Mao Cc: John Garry Cc: Atish Patra Cc: Dima Kogan Cc: Paul Walmsley Cc: Dr. David Alan Gilbert Cc: linux-csky@vger.kernel.orgLink: https://lore.kernel.org/r/20241017001354.56973-12-irogers@google.comSigned-off-by: Namhyung Kim List of files: /linux-6.15/tools/perf/arch/arm64/util/Build

e467705a - perf util: Make util its own library

Tue, 25 Jun 2024 21:41:15 +0000

perf util: Make util its own libraryMake the util directory into its own library. This is done to avoidcompiling code twice, once for the perf tool and once for the perfpython module. For convenience: arch/common.c scripts/perl/Perf-Trace-Util/Context.c scripts/python/Perf-Trace-Util/Context.care made part of this library.Signed-off-by: Ian Rogers Reviewed-by: James Clark Cc: Suzuki K Poulose Cc: Kees Cook Cc: Palmer Dabbelt Cc: Albert Ou Cc: Nick Terrell Cc: Gary Guo Cc: Alex Gaynor Cc: Boqun Feng Cc: Wedson Almeida Filho Cc: Ze Gao Cc: Alice Ryhl Cc: Andrei Vagin Cc: Yicong Yang Cc: Jonathan Cameron Cc: Guo Ren Cc: Miguel Ojeda Cc: Will Deacon Cc: Mike Leach Cc: Leo Yan Cc: Oliver Upton Cc: John Garry Cc: Benno Lossin Cc: Björn Roy Baron Cc: Andreas Hindborg Cc: Paul Walmsley Signed-off-by: Namhyung Kim Link: https://lore.kernel.org/r/20240625214117.953777-7-irogers@google.com List of files: /linux-6.15/tools/perf/arch/arm64/util/Build

378ef0f5 - perf build: Use libtraceevent from the system

Mon, 05 Dec 2022 22:59:39 +0000

perf build: Use libtraceevent from the systemRemove the LIBTRACEEVENT_DYNAMIC and LIBTRACEFS_DYNAMIC make commandline variables.If libtraceevent isn't installed or NO_LIBTRACEEVENT=1 is passed to thebuild, don't compile in libtraceevent and libtracefs support.This also disables CONFIG_TRACE that controls "perf trace".CONFIG_LIBTRACEEVENT is used to control enablement in Build/Makefiles,HAVE_LIBTRACEEVENT is used in C code.Without HAVE_LIBTRACEEVENT tracepoints are disabled and as such thecommands kmem, kwork, lock, sched and timechart are removed. Themajority of commands continue to work including "perf test".Committer notes:Fixed up a tools/perf/util/Build reject and added: #include to tools/perf/util/scripting-engines/trace-event-perl.c.Committer testing: $ rpm -qi libtraceevent-devel Name : libtraceevent-devel Version : 1.5.3 Release : 2.fc36 Architecture: x86_64 Install Date: Mon 25 Jul 2022 03:20:19 PM -03 Group : Unspecified Size : 27728 License : LGPLv2+ and GPLv2+ Signature : RSA/SHA256, Fri 15 Apr 2022 02:11:58 PM -03, Key ID 999f7cbf38ab71f4 Source RPM : libtraceevent-1.5.3-2.fc36.src.rpm Build Date : Fri 15 Apr 2022 10:57:01 AM -03 Build Host : buildvm-x86-05.iad2.fedoraproject.org Packager : Fedora Project Vendor : Fedora Project URL : https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/ Bug URL : https://bugz.fedoraproject.org/libtraceevent Summary : Development headers of libtraceevent Description : Development headers of libtraceevent-libs $Default build: $ ldd ~/bin/perf | grep tracee libtraceevent.so.1 => /lib64/libtraceevent.so.1 (0x00007f1dcaf8f000) $ # perf trace -e sched:* --max-events 10 0.000 migration/0/17 sched:sched_migrate_task(comm: "", pid: 1603763 (perf), prio: 120, dest_cpu: 1) 0.005 migration/0/17 sched:sched_wake_idle_without_ipi(cpu: 1) 0.011 migration/0/17 sched:sched_switch(prev_comm: "", prev_pid: 17 (migration/0), prev_state: 1, next_comm: "", next_prio: 120) 1.173 :0/0 sched:sched_wakeup(comm: "", pid: 3138 (gnome-terminal-), prio: 120) 1.180 :0/0 sched:sched_switch(prev_comm: "", prev_prio: 120, next_comm: "", next_pid: 3138 (gnome-terminal-), next_prio: 120) 0.156 migration/1/21 sched:sched_migrate_task(comm: "", pid: 1603763 (perf), prio: 120, orig_cpu: 1, dest_cpu: 2) 0.160 migration/1/21 sched:sched_wake_idle_without_ipi(cpu: 2) 0.166 migration/1/21 sched:sched_switch(prev_comm: "", prev_pid: 21 (migration/1), prev_state: 1, next_comm: "", next_prio: 120) 1.183 :0/0 sched:sched_wakeup(comm: "", pid: 1602985 (kworker/u16:0-f), prio: 120, target_cpu: 1) 1.186 :0/0 sched:sched_switch(prev_comm: "", prev_prio: 120, next_comm: "", next_pid: 1602985 (kworker/u16:0-f), next_prio: 120) #Had to tweak tools/perf/util/setup.py to make sure the python bindingshared object links with libtraceevent if -DHAVE_LIBTRACEEVENT ispresent in CFLAGS.Building with NO_LIBTRACEEVENT=1 uncovered some more build failures:- Make building of data-convert-bt.c to CONFIG_LIBTRACEEVENT=y- perf-$(CONFIG_LIBTRACEEVENT) += scripts/- bpf_kwork.o needs also to be dependent on CONFIG_LIBTRACEEVENT=y- The python binding needed some fixups and util/trace-event.c can't be built and linked with the python binding shared object, so remove it in tools/perf/util/setup.py and exclude it from the list of dependencies in the python/perf.so Makefile.perf target.Building without libtraceevent-devel installed uncovered more buildfailures:- The python binding tools/perf/util/python.c was assuming that traceevent/parse-events.h was always available, which was the case when we defaulted to using the in-kernel tools/lib/traceevent/ files, now we need to enclose it under ifdef HAVE_LIBTRACEEVENT, just like the other parts of it that deal with tracepoints.- We have to ifdef the rules in the Build files with CONFIG_LIBTRACEEVENT=y to build builtin-trace.c and tools/perf/trace/beauty/ as we only ifdef setting CONFIG_TRACE=y when setting NO_LIBTRACEEVENT=1 in the make command line, not when we don't detect libtraceevent-devel installed in the system. Simplification here to avoid these two ways of disabling builtin-trace.c and not having CONFIG_TRACE=y when libtraceevent-devel isn't installed is the clean way.From Athira:tools/perf/arch/powerpc/util/Build-perf-y += kvm-stat.o+perf-$(CONFIG_LIBTRACEEVENT) += kvm-stat.oThen, ditto for arm64 and s390, detected by container cross build tests.- s/390 uses test__checkevent_tracepoint() that is now only available if HAVE_LIBTRACEEVENT is defined, enclose the callsite with ifder HAVE_LIBTRACEEVENT.Also from Athira:With this change, I could successfully compile in these environment:- Without libtraceevent-devel installed- With libtraceevent-devel installed- With “make NO_LIBTRACEEVENT=1”Then, finally rename CONFIG_TRACEEVENT to CONFIG_LIBTRACEEVENT forconsistency with other libraries detected in tools/perf/.Signed-off-by: Ian Rogers Tested-by: Arnaldo Carvalho de Melo Tested-by: Athira Rajeev Cc: Alexander Shishkin Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Cc: Nick Desaulniers Cc: Peter Zijlstra Cc: Stephane Eranian Cc: bpf@vger.kernel.orgLink: http://lore.kernel.org/lkml/20221205225940.3079667-3-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/arch/arm64/util/Build

057381a7 - perf auxtrace arm64: Add support for HiSilicon PCIe Tune and Trace device driver

Tue, 27 Sep 2022 08:13:59 +0000

perf auxtrace arm64: Add support for HiSilicon PCIe Tune and Trace device driverHiSilicon PCIe tune and trace device (PTT) could dynamically tune thePCIe link's events, and trace the TLP headers).This patch add support for PTT device in perf tool, so users could use'perf record' to get TLP headers trace data.Reviewed-by: Leo Yan Signed-off-by: Qi Liu Signed-off-by: Yicong Yang Acked-by: John Garry Cc: Alexander Shishkin Cc: Bjorn Helgaas Cc: Greg Kroah-Hartman Cc: Ingo Molnar Cc: James Clark Cc: Jonathan Cameron Cc: Lorenzo Pieralisi Cc: Mark Rutland Cc: Mathieu Poirier Cc: Mike Leach Cc: Peter Zijlstra Cc: Qi Liu Cc: Shameerali Kolothum Thodi Cc: Shaokun Zhang Cc: Suzuki Poulouse Cc: Will Deacon Cc: Zeng Prime Cc: linux-arm-kernel@lists.infradead.orgCc: linux-pci@vger.kernel.orgCc: linuxarm@huawei.comLink: https://lore.kernel.org/r/20220927081400.14364-3-yangyicong@huawei.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/arch/arm64/util/Build

e126bef5 - perf pmu: Add pmu_events_map__find() function to find the common PMU map for the system

Wed, 07 Apr 2021 10:32:47 +0000

perf pmu: Add pmu_events_map__find() function to find the common PMU map for the systemAdd a function to find the common PMU map for the system.For arm64, a special variant is added. This is because arm64 supportsheterogeneous CPU systems. As such, it cannot be guaranteed that thecpumap is same for all CPUs. So in case of heterogeneous systems, don'treturn a cpumap.Reviewed-by: Kajol Jain Signed-off-by: John Garry Tested-by: Paul A. Clarke Acked-by: Jiri Olsa Cc: Alexander Shishkin Cc: Ian Rogers Cc: Ingo Molnar Cc: Kan Liang Cc: Leo Yan Cc: Mark Rutland Cc: Mathieu Poirier Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Shaokun Zhang Cc: Will Deacon Cc: linux-arm-kernel@lists.infradead.orgCc: linuxarm@huawei.comLink: https://lore.kernel.org/r/1617791570-165223-4-git-send-email-john.garry@huawei.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/arch/arm64/util/Build

40714c58 - perf mem: Support ARM SPE events

Fri, 06 Nov 2020 09:48:53 +0000

perf mem: Support ARM SPE eventsThis patch adds ARM SPE events for perf memory profiling: 'spe-load': event for only recording memory load ops; 'spe-store': event for only recording memory store ops; 'spe-ldst': event for recording memory load and store ops.Signed-off-by: Leo Yan Acked-by: Jiri Olsa Link: https://lore.kernel.org/r/20201106094853.21082-10-leo.yan@linaro.orgSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/arch/arm64/util/Build

1218838d - perf kvm: Add kvm-stat for arm64

Tue, 27 Oct 2020 06:24:21 +0000

perf kvm: Add kvm-stat for arm64Add support for 'perf kvm stat' on arm64 platform.Example: # perf kvm stat reportAnalyze events for all VMs, all VCPUs: VM-EXIT Samples Samples% Time% Min Time Max Time Avg time DABT_LOW 661867 98.91% 40.45% 2.19us 3364.65us 6.24us ( +- 0.34% ) IRQ 4598 0.69% 57.44% 2.89us 3397.59us 1276.27us ( +- 1.61% ) WFx 1475 0.22% 1.71% 2.22us 3388.63us 118.31us ( +- 8.69% ) IABT_LOW 1018 0.15% 0.38% 2.22us 2742.07us 38.29us ( +- 12.55% ) SYS64 180 0.03% 0.01% 2.07us 112.91us 6.57us ( +- 14.95% ) HVC64 17 0.00% 0.01% 2.19us 322.35us 42.95us ( +- 58.98% )Total Samples:669155, Total events handled time:10216387.86us.Signed-off-by: Sergey Senozhatsky Reviewed-by: Leo Yan Tested-by: Leo Yan Cc: John Garry Cc: Mark Rutland Cc: Mathieu Poirier Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Will Deacon Cc: linux-arm-kernel@lists.infradead.orgCc: Suleiman Souhlal Link: http://lore.kernel.org/lkml/20201027062421.463355-1-sergey.senozhatsky@gmail.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/arch/arm64/util/Build

4979e861 - perf tsc: Add rdtsc() for Arm64

Mon, 14 Sep 2020 11:53:07 +0000

perf tsc: Add rdtsc() for Arm64The system register CNTVCT_EL0 can be used to retrieve the counter fromuser space. Add rdtsc() for Arm64.Signed-off-by: Leo Yan Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: Gustavo A. R. Silva Cc: Ian Rogers Cc: Jiri Olsa Cc: John Garry Cc: Kemeng Shi Cc: Mark Rutland Cc: Mathieu Poirier Cc: Namhyung Kim Cc: Nick Gasson Cc: Peter Zijlstra Cc: Remi Bernon Cc: Stephane Eranian Cc: Steve Maclean Cc: Will Deacon Cc: Zou Wei Cc: linux-arm-kernel@lists.infradead.orgLink: http://lore.kernel.org/lkml/20200914115311.2201-3-leo.yan@linaro.orgSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/arch/arm64/util/Build

78886f3e - perf symbols: Fix arm64 gap between kernel start and module end

Mon, 30 Mar 2020 07:41:11 +0000

perf symbols: Fix arm64 gap between kernel start and module endDuring execution of command 'perf report' in my arm64 virtual machine,this error message is showed:failed to process sample__symbol__inc_addr_samples(860): ENOMEM! sym->name=__this_module, start=0x1477100, addr=0x147dbd8, end=0x80002000, func: 0The error is caused with path:cmd_report __cmd_report perf_session__process_events __perf_session__process_events ordered_events__flush __ordered_events__flush oe->deliver (ordered_events__deliver_event) perf_session__deliver_event machines__deliver_event perf_evlist__deliver_sample tool->sample (process_sample_event) hist_entry_iter__add iter->add_entry_cb(hist_iter__report_callback) hist_entry__inc_addr_samples symbol__inc_addr_samples __symbol__inc_addr_samples h = annotated_source__histogram(src, evidx) (NULL)annotated_source__histogram failed is caused with path:... hist_entry__inc_addr_samples symbol__inc_addr_samples symbol__hists annotated_source__alloc_histograms src->histograms = calloc(nr_hists, sizeof_sym_hist) (failed)Calloc failed as the symbol__size(sym) is too huge. As show in errormessage: start=0x1477100, end=0x80002000, size of symbol is about 2G.This is the same problem as 'perf annotate: Fix s390 gap between kernelend and module start (b9c0a64901d5bd)'. Perf gets symbol information from/proc/kallsyms in __dso__load_kallsyms. A part of symbol in /proc/kallsymsfrom my virtual machine is as follows: #cat /proc/kallsyms | sort ... ffff000001475080 d rpfilter_mt_reg [ip6t_rpfilter] ffff000001475100 d $d [ip6t_rpfilter] ffff000001475100 d __this_module [ip6t_rpfilter] ffff000080080000 t _head ffff000080080000 T _text ffff000080080040 t pe_header ...Take line 'ffff000001475100 d __this_module [ip6t_rpfilter]' as example.The start and end of symbol are both set to ffff000001475100 indso__load_all_kallsyms. Then symbols__fixup_end will set the end of symbolto next big address to ffff000001475100 in /proc/kallsyms, ffff000080080000in this example. Then sizeof of symbol will be about 2G and cause theproblem.The start of module in my machine is ffff000000a62000 t $x [dm_mod]The start of kernel in my machine is ffff000080080000 t _headThere is a big gap between end of module and begin of kernel if a samllamount of memory is used by module. And the last symbol in module willhave a large address range as caotaining the big gap.Give that the module and kernel text segment sequence may change inthe future, fix this by limiting range of last symbol in module and kernelto 4K in arch arm64.Signed-off-by: Kemeng Shi Cc: Alexander Shishkin Cc: Hewenliang Cc: Hu Shiyuan Cc: Ian Rogers Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Cc: Nick Desaulniers Cc: Peter Zijlstra Cc: Thomas Richter Link: http://lore.kernel.org/lkml/33fd24c4-0d5a-9d93-9b62-dffa97c992ca@huawei.com[ refreshed the patch on current codebase, added string.h include as strchr() is used ]Signed-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/arch/arm64/util/Build

7eec00a7 - perf symbols: Consolidate symbol fixup issue

Fri, 06 Mar 2020 01:57:58 +0000

perf symbols: Consolidate symbol fixup issueAfter copying Arm64's perf archive with object files and perf.data fileto x86 laptop, the x86's perf kernel symbol resolution fails. Itoutputs 'unknown' for all symbols parsing.This issue is root caused by the function elf__needs_adjust_symbols(),x86 perf tool uses one weak version, Arm64 (and powerpc) has rewrittentheir own version. elf__needs_adjust_symbols() decides if need to parsesymbols with the relative offset address; but x86 building uses the weakfunction which misses to check for the elf type 'ET_DYN', so that itcannot parse symbols in Arm DSOs due to the wrong result fromelf__needs_adjust_symbols().The DSO parsing should not depend on any specific architecture perfbuilding; e.g. x86 perf tool can parse Arm and Arm64 DSOs, vice versa.And confirmed by Naveen N. Rao that powerpc64 kernels are not beingbuilt as ET_DYN anymore and change to ET_EXEC.This patch removes the arch specific functions for Arm64 and powerpc andchanges elf__needs_adjust_symbols() as a common function.In the common elf__needs_adjust_symbols(), it checks an extra condition'ET_DYN' for elf header type. With this fixing, the Arm64 DSO can beparsed properly with x86's perf tool.Before: # perf script main 3258 1 branches: 0 [unknown] ([unknown]) => ffff800010c4665c [unknown] ([kernel.kallsyms]) main 3258 1 branches: ffff800010c46670 [unknown] ([kernel.kallsyms]) => ffff800010c4eaec [unknown] ([kernel.kallsyms]) main 3258 1 branches: ffff800010c4eaec [unknown] ([kernel.kallsyms]) => ffff800010c4eb00 [unknown] ([kernel.kallsyms]) main 3258 1 branches: ffff800010c4eb08 [unknown] ([kernel.kallsyms]) => ffff800010c4e780 [unknown] ([kernel.kallsyms]) main 3258 1 branches: ffff800010c4e7a0 [unknown] ([kernel.kallsyms]) => ffff800010c4eeac [unknown] ([kernel.kallsyms]) main 3258 1 branches: ffff800010c4eebc [unknown] ([kernel.kallsyms]) => ffff800010c4ed80 [unknown] ([kernel.kallsyms])After: # perf script main 3258 1 branches: 0 [unknown] ([unknown]) => ffff800010c4665c coresight_timeout+0x54 ([kernel.kallsyms]) main 3258 1 branches: ffff800010c46670 coresight_timeout+0x68 ([kernel.kallsyms]) => ffff800010c4eaec etm4_enable_hw+0x3cc ([kernel.kallsyms]) main 3258 1 branches: ffff800010c4eaec etm4_enable_hw+0x3cc ([kernel.kallsyms]) => ffff800010c4eb00 etm4_enable_hw+0x3e0 ([kernel.kallsyms]) main 3258 1 branches: ffff800010c4eb08 etm4_enable_hw+0x3e8 ([kernel.kallsyms]) => ffff800010c4e780 etm4_enable_hw+0x60 ([kernel.kallsyms]) main 3258 1 branches: ffff800010c4e7a0 etm4_enable_hw+0x80 ([kernel.kallsyms]) => ffff800010c4eeac etm4_enable+0x2d4 ([kernel.kallsyms]) main 3258 1 branches: ffff800010c4eebc etm4_enable+0x2e4 ([kernel.kallsyms]) => ffff800010c4ed80 etm4_enable+0x1a8 ([kernel.kallsyms])v3: Changed to check for ET_DYN across all architectures.v2: Fixed Arm64 and powerpc native building.Reported-by: Mike Leach Signed-off-by: Leo Yan Reviewed-by: Naveen N. Rao Acked-by: Jiri Olsa Cc: Alexander Shishkin Cc: Allison Randal Cc: Enrico Weigelt Cc: Greg Kroah-Hartman Cc: Hendrik Brueckner Cc: John Garry Cc: Kate Stewart Cc: Mark Rutland Cc: Mathieu Poirier Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Thomas Richter Link: http://lore.kernel.org/lkml/20200306015759.10084-1-leo.yan@linaro.orgSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/arch/arm64/util/Build

42466b9f - perf tools: Avoid 'sample_reg_masks' being const + weak

Tue, 01 Oct 2019 00:36:23 +0000

perf tools: Avoid 'sample_reg_masks' being const + weakBeing const + weak breaks with some compilers that constant-propagatefrom the weak symbol. This behavior is outside of the specification, butin LLVM is chosen to match GCC's behavior.LLVM's implementation was set in this patch: https://github.com/llvm/llvm-project/commit/f49573d1eedcf1e44893d5a062ac1b72c8419646A const + weak symbol is set to be weak_odr: https://llvm.org/docs/LangRef.htmlODR is one definition rule, and given there is one constant definitionconstant-propagation is possible. It is possible to get this code tomiscompile with LLVM when applying link time optimization. As compilersbecome more aggressive, this is likely to break in more instances.Move the definition of sample_reg_masks to the conditional part ofperf_regs.h and guard usage with HAVE_PERF_REGS_SUPPORT. This avoids theweak symbol.Fix an issue when HAVE_PERF_REGS_SUPPORT isn't defined from patch v1.In v3, add perf_regs.c for architectures that HAVE_PERF_REGS_SUPPORT butdon't declare sample_regs_masks.Further notes:Jiri asked: "Is this just a precaution or you actualy saw some breakage?"Ian answered: "We saw a breakage with clang with thinlto enabled for linking. Our compiler team had recently seen, and were surprised by, a similar issue and were able to dig out the weak ODR issue."Signed-off-by: Ian Rogers Reviewed-by: Nick Desaulniers Acked-by: Jiri Olsa Cc: Albert Ou Cc: Alexander Shishkin Cc: Alexey Budankov Cc: Andi Kleen Cc: clang-built-linux@googlegroups.comCc: Guo Ren Cc: Kan Liang Cc: linux-riscv@lists.infradead.orgCc: Mao Han Cc: Mark Rutland Cc: Namhyung Kim Cc: Palmer Dabbelt Cc: Paul Walmsley Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lore.kernel.org/lkml/20191001003623.255186-1-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/arch/arm64/util/Build

5ff32883 - perf tools: Rename build libperf to perf

Wed, 13 Feb 2019 12:32:39 +0000

perf tools: Rename build libperf to perfRename build libperf to perf, because it's used to build perf.The libperf build object name will be used for libperf library.Signed-off-by: Jiri Olsa Cc: Alexander Shishkin Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20190213123246.4015-4-jolsa@kernel.orgSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/arch/arm64/util/Build

744e9a91 - perf tools arm64: Add libdw DWARF post unwind support for ARM64

Fri, 09 Mar 2018 03:10:30 +0000

perf tools arm64: Add libdw DWARF post unwind support for ARM64Based on prior work: https://lkml.org/lkml/2014/5/6/395and on how other arches add libdw unwind support. Includes support forrunning the unwind test, e.g., on a system with only elfutils' libdw0.170, the test now runs, and successfully: $ ./perf test unwind 56: Test dwarf unwind : OkOriginally-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.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/arch/arm64/util/Build

ffd3d18c - perf tools: Add ARM Statistical Profiling Extensions (SPE) support

Sun, 14 Jan 2018 19:28:50 +0000

perf tools: Add ARM Statistical Profiling Extensions (SPE) support'perf record' and 'perf report --dump-raw-trace' supported in thisrelease.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-traceNote that the perf.data file is portable, so the report can be run onanother architecture host if necessary.Output will contain raw SPE data and its textual representation, suchas: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 releaseSigned-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.orgCc: 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.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/arch/arm64/util/Build

f1031c8d - perf probe arm64: Fix symbol fixup issues due to ELF type

Thu, 14 Dec 2017 23:52:42 +0000

perf probe arm64: Fix symbol fixup issues due to ELF typeOn an arm64 machine running a CONFIG_RANDOMIZE_BASE=y kernel, perfkernel symbol resolution fails. Debugging saw symsrc_init calling thedefault 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 symbolfixup 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.orgLink: http://lkml.kernel.org/r/20171214175242.e30450f17f93ad675d968fa3@arm.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/arch/arm64/util/Build

b57df288 - perf tools arm64: Add support for get_cpuid_str function.

Mon, 16 Oct 2017 18:32:19 +0000

perf tools arm64: Add support for get_cpuid_str function.The get_cpuid_str function returns the MIDR string of the first onlinecpu 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.orgLink: http://lkml.kernel.org/r/20171016183222.25750-3-ganapatrao.kulkarni@cavium.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/arch/arm64/util/Build

a818c563 - perf tools: Add coresight etm PMU record capabilities

Fri, 16 Sep 2016 15:50:00 +0000

perf tools: Add coresight etm PMU record capabilitiesCoresight ETMs are IP blocks used to perform HW assisted tracing on aCPU core. This patch introduce the required auxiliary API functionsallowing the perf core to interact with a tracer.Signed-off-by: Mathieu Poirier Acked-by: Adrian Hunter Cc: Alexander Shishkin Cc: Jiri Olsa Cc: Peter Zijlstra Cc: linux-arm-kernel@lists.infradead.orgLink: http://lkml.kernel.org/r/1474041004-13956-4-git-send-email-mathieu.poirier@linaro.orgSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/arch/arm64/util/Build

7e21b0d5 - perf tools: Make coresight PMU listable

Fri, 16 Sep 2016 15:49:59 +0000

perf tools: Make coresight PMU listableAdding the required mechanic allowing 'perf list pmu' to discovercoresight ETM/PTM tracers.Signed-off-by: Mathieu Poirier Acked-by: Adrian Hunter Acked-by: Jiri Olsa Cc: Alexander Shishkin Cc: Peter Zijlstra Cc: linux-arm-kernel@lists.infradead.orgLink: http://lkml.kernel.org/r/1474041004-13956-3-git-send-email-mathieu.poirier@linaro.orgSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/arch/arm64/util/Build

9d8e14d3 - perf unwind: Separate local/remote libunwind config

Fri, 03 Jun 2016 03:33:15 +0000

perf unwind: Separate local/remote libunwind configCONFIG_LIBUNWIND/NO_LIBUNWIND are changed to CONFIG_LOCAL_LIBUNWIND/NO_LOCAL_LIBUNWIND for retaining local unwind features. The newCONFIG_LIBUNWIND stands for either local or remote or both unwind aresupported, and NO_LIBUNWIND means that neither local nor remote unwindis supported.LIBUNWIND_LIBS is eliminated in LDFLAGS if local libunwind is notsupported.Signed-off-by: He Kuang Acked-by: Jiri Olsa Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: David Ahern Cc: Ekaterina Tumanova Cc: Josh Poimboeuf Cc: Kan Liang Cc: Masami Hiramatsu Cc: Namhyung Kim Cc: Pekka Enberg Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Sukadev Bhattiprolu Cc: Wang Nan Link: http://lkml.kernel.org/r/1464924803-22214-7-git-send-email-hekuang@huawei.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/arch/arm64/util/Build