Changes in Build

e7bb49e3 - perf x86: Define arch_fetch_insn in NO_AUXTRACE builds

Tue, 19 Nov 2024 01:16:34 +0000

perf x86: Define arch_fetch_insn in NO_AUXTRACE buildsarchinsn.c containing arch_fetch_insn was only enabled withCONFIG_AUXTRACE, but this meant that a NO_AUXTRACE build on x86 woulduse the empty weak version of arch_fetch_insn - weak symbols are afrequent source of errors like this and are outside of the Cspecification. Change it so that archinsn.c is always built on x86 andmake the weak symbol empty version of arch_fetch_insn a strong oneguarded by ifdefs.arch_fetch_insn on x86 depends on insn_decode which is a functionincluded then built into intel-pt-insn-decoder.c.intel-pt-insn-decoder.c isn't built in a NO_AUXTRACE=1 build. Separatethe insn_decode function from intel-pt-insn-decoder.c by just directlycompiling the relevant file. Guard this compilation to be for eitheralways on x86 (because of the use in arch_fetch_insn) or when auxtraceis enabled. Apply the CFLAGS overrides as necessary, reducing the amountof code where warnings are disabled.Signed-off-by: Ian Rogers Tested-by: Adrian Hunter Tested-by: Arnaldo Carvalho de Melo Cc: Alexander Shishkin Cc: Andi Kleen Cc: Athira Rajeev Cc: Colin Ian King Cc: Dapeng Mi Cc: Howard Chu Cc: Ilya Leoshkevich Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: Josh Poimboeuf Cc: Kan Liang Cc: Mark Rutland Cc: Michael Petlan Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Thomas Richter Cc: Veronika Molnarova Cc: Weilin Wang Link: https://lore.kernel.org/r/20241119011644.971342-13-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/arch/x86/util/Build

bf4e799a - perf dwarf-regs: Move x86 dwarf-regs out of arch

Fri, 08 Nov 2024 23:45:52 +0000

perf dwarf-regs: Move x86 dwarf-regs out of archMove arch/x86/util/dwarf-regs.c to util/dwarf-regs-x86.c and compilein unconditionally. To avoid get_arch_regnum being duplicated, renameto get_x86_regnum and add to get_dwarf_regnum switch.For get_arch_regstr, this was unused on x86 unless the machine typewas EM_NONE. Map that case to EM_HOST and remove get_arch_regstr fromdwarf-regs-x86.c.Reviewed-by: Masami Hiramatsu (Google) Signed-off-by: Ian Rogers 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/20241108234606.429459-8-irogers@google.comSigned-off-by: Namhyung Kim List of files: /linux-6.15/tools/perf/arch/x86/util/Build

28398ce1 - perf tools: Move x86__is_amd_cpu() to util/env.c

Wed, 16 Oct 2024 06:23:56 +0000

perf tools: Move x86__is_amd_cpu() to util/env.cIt can be called from non-x86 platform so let's move it to the generalutil directory. Also add a new helper perf_env__is_x86_amd_cpu() sothat it can be called with an existing perf_env as well.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/20241016062359.264929-7-namhyung@kernel.orgSigned-off-by: Namhyung Kim List of files: /linux-6.15/tools/perf/arch/x86/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/x86/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/x86/util/Build

0cd1ca46 - perf tool x86: Consolidate is_amd check into single function

Tue, 13 Jun 2023 09:55:04 +0000

perf tool x86: Consolidate is_amd check into single functionThere are multiple places where x86 specific code determines AMD vsIntel arch and acts based on that. Consolidate those checks into asingle function.Signed-off-by: Ravi Bangoria Acked-by: Ian Rogers Cc: Adrian Hunter Cc: Ali Saidi Cc: Ananth Narayan Cc: James Clark Cc: Jiri Olsa Cc: Kan Liang Cc: Leo Yan Cc: Madhavan Srinivasan Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Sandipan Das Cc: Santosh Shukla Link: https://lore.kernel.org/r/20230613095506.547-3-ravi.bangoria@amd.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/arch/x86/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/x86/util/Build

f9ed693e - perf stat: Enable iostat mode for x86 platforms

Mon, 19 Apr 2021 09:41:46 +0000

perf stat: Enable iostat mode for x86 platformsThis functionality is based on recently introduced sysfs attributes forIntel® Xeon® Scalable processor family (code name Skylake-SP):Commit bb42b3d39781d7fc ("perf/x86/intel/uncore: Expose an Uncore unit to IIO PMON mapping")Mode is intended to provide four I/O performance metrics in MB per eachPCIe root port: - Inbound Read: I/O devices below root port read from the host memory - Inbound Write: I/O devices below root port write to the host memory - Outbound Read: CPU reads from I/O devices below root port - Outbound Write: CPU writes to I/O devices below root portEach metric requiries only one uncore event which increments at every 4Btransfer in corresponding direction. The formulas to compute metricsare generic: #EventCount * 4B / (1024 * 1024)Acked-by: Namhyung Kim Signed-off-by: Alexander Antonov Cc: Alexander Shishkin Cc: Alexey V Bayduraev Cc: Andi Kleen Cc: Arnaldo Carvalho de Melo Cc: Ian Rogers Cc: Ingo Molnar Cc: Jiri Olsa Cc: Mark Rutland Cc: Peter Zijlstra Link: https://lore.kernel.org/r/20210419094147.15909-4-alexander.antonov@linux.intel.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/arch/x86/util/Build

ea8d0ed6 - perf tools: Support PERF_SAMPLE_WEIGHT_STRUCT

Tue, 02 Feb 2021 20:09:09 +0000

perf tools: Support PERF_SAMPLE_WEIGHT_STRUCTThe new sample type, PERF_SAMPLE_WEIGHT_STRUCT, is an alternative of thePERF_SAMPLE_WEIGHT sample type. Users can apply either thePERF_SAMPLE_WEIGHT sample type or the PERF_SAMPLE_WEIGHT_STRUCT sampletype to retrieve the sample weight, but they cannot apply both sampletypes simultaneously.The new sample type shares the same space as the PERF_SAMPLE_WEIGHTsample type. The lower 32 bits are exactly the same for both sampletype. The higher 32 bits may be different for different architecture.Add arch specific arch_evsel__set_sample_weight() to set the new sampletype for X86. Only store the lower 32 bits for the sample->weight if thenew sample type is applied. In practice, no memory access could lastthan 4G cycles. No data will be lost.If the kernel doesn't support the new sample type. Fall back to thePERF_SAMPLE_WEIGHT sample type.There is no impact for other architectures.Committer notes:Fixup related to PERF_SAMPLE_CODE_PAGE_SIZE, present in acme/perf/corebut not upstream yet.Signed-off-by: Kan Liang Cc: Andi Kleen Cc: Jin Yao Cc: Jiri Olsa Cc: Madhavan Srinivasan Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lore.kernel.org/lkml/1612296553-21962-6-git-send-email-kan.liang@linux.intel.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/arch/x86/util/Build

2a57d408 - perf tools: Support the auxiliary event

Tue, 02 Feb 2021 20:09:06 +0000

perf tools: Support the auxiliary eventOn the Intel Sapphire Rapids server, an auxiliary event has to beenabled simultaneously with the load latency event to retrieve completeMemory Info.Add X86 specific perf_mem_events__name() to handle the auxiliary event.- Users are only interested in the samples of the mem-loads event. Sample read the auxiliary event.- The auxiliary event must be in front of the load latency event in a group. Assume the second event to sample if the auxiliary event is the leader.- Add a weak is_mem_loads_aux_event() to check the auxiliary event for X86. For other ARCHs, it always return false.Parse the unique event name, mem-loads-aux, for the auxiliary event.Committer notes:According to 61b985e3e775a3a7 ("perf/x86/intel: Add perf core PMUsupport for Sapphire Rapids"), ENODATA is only returned bysys_perf_event_open() when used with these auxiliary events, with thisin evsel__open_strerror(): case ENODATA: return scnprintf(msg, size, "Cannot collect data source with the load latency event alone. " "Please add an auxiliary event in front of the load latency event.");This is Ok at this point in time, but fragile long term, I pointed thisout in the e-mail thread, requesting a follow up patch to check ifENODATA is really for this specific case.Fixed up sizeof(MEM_LOADS_AUX_NAME) bug pointed out by Namhyung.Signed-off-by: Kan Liang Cc: Andi Kleen Cc: Jin Yao Cc: Jiri Olsa Cc: Madhavan Srinivasan Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lore.kernel.org/lkml/20210205152648.GC920417@kernel.orgLink: http://lore.kernel.org/lkml/1612296553-21962-3-git-send-email-kan.liang@linux.intel.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/arch/x86/util/Build

42641d6f - perf stat: Add Topdown metrics events as default events

Thu, 21 Jan 2021 13:37:52 +0000

perf stat: Add Topdown metrics events as default eventsThe Topdown Microarchitecture Analysis (TMA) Method is a structuredanalysis methodology to identify critical performance bottlenecks inout-of-order processors. From the Ice Lake and later platforms, theTopdown information can be retrieved from the dedicated "metrics"register, which isn't impacted by other events. Also, the Topdownmetrics support both per thread/process and per core measuring. AddingTopdown metrics events as default events can enrich the defaultmeasuring information, and would not cost any extra multiplexing.Introduce arch_evlist__add_default_attrs() to allow architecturespecific default events. Add the Topdown metrics events in the X86specific arch_evlist__add_default_attrs(). Other architectures can addtheir own default events later separately.With the patch: $ perf stat sleep 1 Performance counter stats for 'sleep 1': 0.82 msec task-clock:u # 0.001 CPUs utilized 0 context-switches:u # 0.000 K/sec 0 cpu-migrations:u # 0.000 K/sec 61 page-faults:u # 0.074 M/sec 319,941 cycles:u # 0.388 GHz 242,802 instructions:u # 0.76 insn per cycle 54,380 branches:u # 66.028 M/sec 4,043 branch-misses:u # 7.43% of all branches 1,585,555 slots:u # 1925.189 M/sec 238,941 topdown-retiring:u # 15.0% retiring 410,378 topdown-bad-spec:u # 25.8% bad speculation 634,222 topdown-fe-bound:u # 39.9% frontend bound 304,675 topdown-be-bound:u # 19.2% backend bound 1.001791625 seconds time elapsed 0.000000000 seconds user 0.001572000 seconds sysSigned-off-by: Kan Liang Tested-by: Arnaldo Carvalho de Melo Cc: Andi Kleen Cc: Jin Yao Cc: Jiri Olsa Cc: Namhyung Kim Link: http://lore.kernel.org/lkml/20210121133752.118327-1-kan.liang@linux.intel.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/arch/x86/util/Build

687986bb - perf tools: Rename group to topdown

Fri, 11 Sep 2020 14:48:05 +0000

perf tools: Rename group to topdownThe group.h/c only include TopDown group related functions. The name"group" is too generic and inaccurate. Use the name "topdown" to replaceit.Move topdown related functions to a dedicated file, topdown.c.Signed-off-by: Kan Liang Acked-by: Jiri Olsa Acked-by: Namhyung Kim Cc: Andi Kleen Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lore.kernel.org/lkml/20200911144808.27603-2-kan.liang@linux.intel.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/arch/x86/util/Build

3ab481a1 - perf script: Support insn output for normal samples

Tue, 05 Mar 2019 14:47:45 +0000

perf script: Support insn output for normal samplesperf script -F +insn was only working for PT traces because the PTinstruction decoder was filling in the insn/insn_len sample attributes.Support it for non PT samples too on x86 using the existing x86instruction decoder.This adds some extra checking to ensure that we don't try to decodeinstructions when using perf.data from a different architecture. % perf record -a sleep 1 % perf script -F ip,sym,insn --xed ffffffff811704c9 remote_function movl %eax, 0x18(%rbx) ffffffff8100bb50 intel_bts_enable_local retq ffffffff81048612 native_apic_mem_write movl %esi, -0xa04000(%rdi) ffffffff81048612 native_apic_mem_write movl %esi, -0xa04000(%rdi) ffffffff81048612 native_apic_mem_write movl %esi, -0xa04000(%rdi) ffffffff810f1f79 generic_exec_single xor %eax, %eax ffffffff811704c9 remote_function movl %eax, 0x18(%rbx) ffffffff8100bb34 intel_bts_enable_local movl 0x2000(%rax), %edx ffffffff81048610 native_apic_mem_write mov %edi, %edi ...Committer testing:Before: # perf script -F ip,sym,insn --xed | head -5 ffffffffa4068804 native_write_msr addb %al, (%rax) ffffffffa4068804 native_write_msr addb %al, (%rax) ffffffffa4068804 native_write_msr addb %al, (%rax) ffffffffa4068806 native_write_msr addb %al, (%rax) ffffffffa4068806 native_write_msr addb %al, (%rax) # perf script -F ip,sym,insn --xed | grep -v "addb %al, (%rax)" #After: # perf script -F ip,sym,insn --xed | head -5 ffffffffa4068804 native_write_msr wrmsr ffffffffa4068804 native_write_msr wrmsr ffffffffa4068804 native_write_msr wrmsr ffffffffa4068806 native_write_msr nopl %eax, (%rax,%rax,1) ffffffffa4068806 native_write_msr nopl %eax, (%rax,%rax,1) # perf script -F ip,sym,insn --xed | grep -v "addb %al, (%rax)" | head -5 ffffffffa4068804 native_write_msr wrmsr ffffffffa4068804 native_write_msr wrmsr ffffffffa4068804 native_write_msr wrmsr ffffffffa4068806 native_write_msr nopl %eax, (%rax,%rax,1) ffffffffa4068806 native_write_msr nopl %eax, (%rax,%rax,1) #More examples: # perf script -F ip,sym,insn --xed | grep -v native_write_msr | head ffffffffa416b90e tick_check_broadcast_expired btq %rax, 0x1a5f42a(%rip) ffffffffa4956bd0 nmi_cpu_backtrace pushq %r13 ffffffffa415b95e __hrtimer_next_event_base movq 0x18(%rax), %rdx ffffffffa4956bf3 nmi_cpu_backtrace popq %r12 ffffffffa4171d5c smp_call_function_single pause ffffffffa4956bdd nmi_cpu_backtrace mov %ebp, %r12d ffffffffa4797e4d menu_select cmp $0x190, %rax ffffffffa4171d5c smp_call_function_single pause ffffffffa405a7d8 nmi_cpu_backtrace_handler callq 0xffffffffa4956bd0 ffffffffa4797f7a menu_select shr $0x3, %rax #Which matches the annotate output modulo resolving callqs: # perf annotate --stdio2 nmi_cpu_backtrace_handler Samples: 4 of event 'cycles:ppp', 4000 Hz, Event count (approx.): 35908, [percent: local period] nmi_cpu_backtrace_handler() /lib/modules/5.0.0+/build/vmlinux Percent Disassembly of section .text: ffffffff8105a7d0 : nmi_cpu_backtrace_handler(): nmi_trigger_cpumask_backtrace(mask, exclude_self, nmi_raise_cpu_backtrace); } static int nmi_cpu_backtrace_handler(unsigned int cmd, struct pt_regs *regs) { 24.45 → callq __fentry__ if (nmi_cpu_backtrace(regs)) mov %rsi,%rdi 75.55 → callq nmi_cpu_backtrace return NMI_HANDLED; movzbl %al,%eax return NMI_DONE; } ← retq # # perf annotate --stdio2 __hrtimer_next_event_base Samples: 4 of event 'cycles:ppp', 4000 Hz, Event count (approx.): 767977, [percent: local period] __hrtimer_next_event_base() /lib/modules/5.0.0+/build/vmlinux Percent Disassembly of section .text: ffffffff8115b910 <__hrtimer_next_event_base>: __hrtimer_next_event_base(): static ktime_t __hrtimer_next_event_base(struct hrtimer_cpu_base *cpu_base, const struct hrtimer *exclude, unsigned int active, ktime_t expires_next) { → callq __fentry__ 4a: add $0x1,%r14 77.31 mov 0x18(%rax),%rdx shl $0x6,%r14 sub 0x38(%rbx,%r14,1),%rdx if (expires < expires_next) { cmp %r12,%rdx ↓ jge 68Signed-off-by: Andi Kleen Tested-by: Arnaldo Carvalho de Melo Cc: Jiri Olsa Cc: Namhyung Kim Link: http://lkml.kernel.org/r/20190305144758.12397-3-andi@firstfloor.org[ Converted fetch_exe() to use the name it ended up having when merged: thread__memcpy() ][ archinsn.c needs the instruction decoder that is only build when CONFIG_AUXTRACE=y, fix that ]Signed-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/arch/x86/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/x86/util/Build

a8ce99b0 - perf machine: Synthesize and process mmap events for x86 PTI entry trampolines

Tue, 22 May 2018 10:54:37 +0000

perf machine: Synthesize and process mmap events for x86 PTI entry trampolinesLike the kernel text, the location of x86 PTI entry trampolines must berecorded in the perf.data file. Like the kernel, synthesize a mmap eventfor that, and add processing for it.Signed-off-by: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: Andy Lutomirski Cc: Dave Hansen Cc: H. Peter Anvin Cc: Jiri Olsa Cc: Joerg Roedel Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: x86@kernel.orgLink: http://lkml.kernel.org/r/1526986485-6562-10-git-send-email-adrian.hunter@intel.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/arch/x86/util/Build

1c5aae77 - perf machine: Create maps for x86 PTI entry trampolines

Tue, 22 May 2018 10:54:36 +0000

perf machine: Create maps for x86 PTI entry trampolinesCreate maps for x86 PTI entry trampolines, based on symbols found inkallsyms. It is also necessary to keep track of whether the trampolineshave been mapped particularly when the kernel dso is kcore.Signed-off-by: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: Andy Lutomirski Cc: Dave Hansen Cc: H. Peter Anvin Cc: Jiri Olsa Cc: Joerg Roedel Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: x86@kernel.orgLink: http://lkml.kernel.org/r/1526986485-6562-9-git-send-email-adrian.hunter@intel.com[ Fix extra_kernel_map_info.cnt designed struct initializer on gcc 4.4.7 (centos:6, etc) ]Signed-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/arch/x86/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/x86/util/Build

44b1e60a - perf stat: Basic support for TopDown in perf stat

Mon, 30 May 2016 15:49:42 +0000

perf stat: Basic support for TopDown in perf statAdd basic plumbing for TopDown in perf statTopDown is intended to replace the frontend cycles idle/ backend cyclesidle metrics in standard perf stat output. These metrics are notreliable in many workloads, due to out of order effects.This implements a new --topdown mode in perf stat (similar to--transaction) that measures the pipe line bottlenecks usingstandardized formulas. The measurement can be all done with 5 counters(one fixed counter)The result are four metrics:FrontendBound, BackendBound, BadSpeculation, Retiringthat describe the CPU pipeline behavior on a high level.The full top down methology has many hierarchical metrics. Thisimplementation only supports level 1 which can be collected withoutmultiplexing. A full implementation of top down on top of perf isavailable in pmu-tools toplev. (http://github.com/andikleen/pmu-tools)The current version works on Intel Core CPUs starting with Sandy Bridge,and Atom CPUs starting with Silvermont. In principle the genericmetrics should be also implementable on other out of order CPUs.TopDown level 1 uses a set of abstracted metrics which are generic toout of order CPU cores (although some CPUs may not implement all ofthem): topdown-total-slots Available slots in the pipeline topdown-slots-issued Slots issued into the pipeline topdown-slots-retired Slots successfully retired topdown-fetch-bubbles Pipeline gaps in the frontend topdown-recovery-bubbles Pipeline gaps during recovery from misspeculationThese metrics then allow to compute four useful metrics:FrontendBound, BackendBound, Retiring, BadSpeculation.Add a new --topdown options to enable events. When --topdown isspecified set up events for all topdown events supported by the kernel.Add topdown-* as a special case to the event parser, as is needed forall events containing -.The actual code to compute the metrics is in follow-on patches.v2: Use standard sysctl read function.v3: Move x86 specific code to arch/v4: Enable --metric-only implicitly for topdown.v5: Add --single-thread option to not force per core modev6: Fix output order of topdown metricsv7: Allow combining with -dv8: Remove --single-thread againv9: Rename functions, adding arch_ and topdown_.v10: Expand man page and describe TopDown betterPaste intro into commit description.Print error when malloc fails.Signed-off-by: Andi Kleen Acked-by: Jiri Olsa Link: http://lkml.kernel.org/r/1464119559-17203-1-git-send-email-andi@firstfloor.orgSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/arch/x86/util/Build

30433a3a - perf bpf: Compile dwarf-regs.c if CONFIG_BPF_PROLOGUE is on

Mon, 16 Nov 2015 12:10:11 +0000

perf bpf: Compile dwarf-regs.c if CONFIG_BPF_PROLOGUE is onregs_query_register_offset() in dwarf-regs.c is required by BPFprologue. This patch compiles it if CONFIG_BPF_PROLOGUE is on to avoidbuild failure when CONFIG_BPF_PROLOGUE is on but CONFIG_DWARF is notset.Signed-off-by: He Kuang Acked-by: Masami Hiramatsu Cc: Alexei Starovoitov Cc: He Kuang Cc: Zefan Li Cc: pi3orama@163.comLink: http://lkml.kernel.org/r/1447675815-166222-10-git-send-email-wangnan0@huawei.comSigned-off-by: Wang Nan Signed-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/arch/x86/util/Build

c5e991ee - perf/x86: Add list of register names

Mon, 31 Aug 2015 16:41:11 +0000

perf/x86: Add list of register namesThis patch adds a way to locate a register identifier (PERF_X86_REG_*)based on its name, e.g., AX.This will be used by a subsequent patch to improved flexibility of perfrecord.Signed-off-by: Stephane Eranian Cc: Adrian Hunter Cc: Andi Kleen Cc: David Ahern Cc: Jiri Olsa Cc: Kan Liang Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1441039273-16260-3-git-send-email-eranian@google.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/arch/x86/util/Build