- 05 Oct, 2023 3 commits
-
-
Athira Rajeev authored
Update "struct dso" to include new member "text_end". This new field will represent the offset for end of text section for a dso. For elf, this value is derived as: sh_size (Size of section in byes) + sh_offset (Section file offst) of the elf header for text. For bfd, this value is derived as: 1. For PE file, section->size + ( section->vma - dso->text_offset) 2. Other cases: section->filepos (file position) + section->size (size of section) To resolve the address from a sample, perf looks at the DSO maps. In case of address from a kernel module, there were some address found to be not resolved. This was observed while running perf test for "Object code reading". Though the ip falls beteen the start address of the loaded module (perf map->start ) and end address ( perf map->end), it was unresolved. Example: Reading object code for memory address: 0xc008000007f0142c File is: /lib/modules/6.5.0-rc3+/kernel/fs/xfs/xfs.ko On file address is: 0x1114cc Objdump command is: objdump -z -d --start-address=0x11142c --stop-address=0x1114ac /lib/modules/6.5.0-rc3+/kernel/fs/xfs/xfs.ko objdump read too few bytes: 128 test child finished with -1 Here, module is loaded at: # cat /proc/modules | grep xfs xfs 2228224 3 - Live 0xc008000007d00000 From objdump for xfs module, text section is: text 0010f7bc 0000000000000000 0000000000000000 000000a0 2**4 Here the offset for 0xc008000007f0142c ie 0x112074 falls out .text section which is up to 0x10f7bc. In this case for module, the address 0xc008000007e11fd4 is pointing to stub instructions. This address range represents the module stubs which is allocated on module load and hence is not part of DSO offset. To identify such address, which falls out of text section and within module end, added the new field "text_end" to "struct dso". Reported-by:Disha Goel <disgoel@linux.ibm.com> Signed-off-by:
Athira Rajeev <atrajeev@linux.vnet.ibm.com> Reviewed-by:
Adrian Hunter <adrian.hunter@intel.com> Reviewed-by:
Kajol Jain <kjain@linux.ibm.com> Acked-by:
Namhyung Kim <namhyung@kernel.org> Cc: maddy@linux.ibm.com Cc: disgoel@linux.vnet.ibm.com Cc: linuxppc-dev@lists.ozlabs.org Link: https://lore.kernel.org/r/20230928075213.84392-1-atrajeev@linux.vnet.ibm.comSigned-off-by:
-
Ian Rogers authored
Switch the test program to sleep that makes more sense for system wide events. Only enable system wide when root or not paranoid. This avoids failures under some testing conditions like ARM cloud. Signed-off-by:
Ian Rogers <irogers@google.com> Acked-by:
-
Kuan-Wei Chiu authored
In the previous code, there was a memory leak issue where the previously allocated memory was not freed upon a failed lseek operation. This patch addresses the problem by releasing the old memory before returning -errno in case of a lseek failure. This ensures that memory is properly managed and avoids potential memory leaks. Signed-off-by:
Kuan-Wei Chiu <visitorckw@gmail.com> Acked-by:
-
- 30 Sep, 2023 2 commits
-
-
Adrian Hunter authored
Ensure PERF_IP_FLAG_ASYNC is set always for asynchronous branches (i.e. interrupts etc). Fixes: 90e457f7 ("perf tools: Add Intel PT support") Cc: stable@vger.kernel.org Signed-off-by:
-
Ian Rogers authored
PMU alias names were computed when the first perf_pmu is created, scanning all PMUs in event sources for a file called alias that generally doesn't exist. Switch to trying to load the file when all PMU related files are loaded in lookup. This would cause a PMU name lookup of an alias name to fail if no PMUs were loaded, so in that case all PMUs are loaded and the find repeated. The overhead is similar but in the (very) general case not all PMUs are scanned for the alias file. As the overhead occurs once per invocation it doesn't show in perf bench internals pmu-scan. On a tigerlake machine, the number of openat system calls for an event of cpu/cycles/ with perf stat reduces from 94 to 69 (ie 25 fewer openat calls). Signed-off-by:
-
- 28 Sep, 2023 9 commits
-
-
Athira Rajeev authored
Testcase "Parsing of all PMU events from sysfs" parse events for all PMUs, and not just cpu. In case of powerpc, the PowerVM environment supports events from hv_24x7 and hv_gpci PMU which is of example format like below: - hv_24x7/CPM_ADJUNCT_INST,domain=?,core=?/ - hv_gpci/event,partition_id=?/ The value for "?" needs to be filled in depending on system configuration. It is better to skip these parametrized events in this test as it is done in: 'commit b50d691e ("perf test: Fix "all PMU test" to skip parametrized events")' which handled a simialr instance with "all PMU test". Fix parse-events test to skip parametrized events since it needs proper setup of the parameters. Signed-off-by:
Sachin Sant <sachinp@linux.ibm.com> Reviewed-by:
-
Jing Zhang authored
Add JSON metrics for Arm CMN. Currently just add part of CMN PMU metrics which are general and compatible for any SoC with CMN-ANY. Signed-off-by:
Jing Zhang <renyu.zj@linux.alibaba.com> Reviewed-by:
John Garry <john.g.garry@oracle.com> Reviewed-by:
-
Jing Zhang authored
Currently just add aliases for part of Arm CMN PMU events which are general and compatible for any SoC and CMN-ANY. "Compat" value "(434|436|43c|43a).*" means it is compatible with all CMN600/CMN650/CMN700/Ci700, which can be obtained from commit 7819e05a ("perf/arm-cmn: Revamp model detection"). The arm-cmn PMU events got from: [0] https://developer.arm.com/documentation/100180/0302/?lang=en [1] https://developer.arm.com/documentation/101408/0100/?lang=en [2] https://developer.arm.com/documentation/102308/0302/?lang=en [3] https://developer.arm.com/documentation/101569/0300/?lang=enSigned-off-by:
-
Jing Zhang authored
Add new event test for uncore system event which is used to verify the functionality of "Compat" matching multiple identifiers and the new event fields "EventidCode" and "NodeType". Signed-off-by:
-
Jing Zhang authored
The perf_pmu_test_event.matching_pmu didn't work. No matter what its value is, it does not affect the test results. So let matching_pmu be used for matching perf_pmu_test_pmu.pmu.name. Signed-off-by:
-
Jing Zhang authored
The previous code assumes an event has either an "event=" or "config" field at the beginning. For CMN neither of these may be present, as an event is typically "type=xx,eventid=xxx". So add EventidCode and NodeType to support CMN event description. I compared pmu_event.c before and after compiling with JEVENT_ARCH=all, they are consistent. Signed-off-by:
-
Jing Zhang authored
The jevent "Compat" is used for uncore PMU alias or metric definitions. The same PMU driver has different PMU identifiers due to different hardware versions and types, but they may have some common PMU metric. Since a Compat value can only match one identifier, when adding the same metric to PMUs with different identifiers, each identifier needs to be defined once, which is not streamlined enough. So let "Compat" support using regular expression to match multiple identifiers for uncore PMU metric. Signed-off-by:
-
Jing Zhang authored
The jevent "Compat" is used for uncore PMU alias or metric definitions. The same PMU driver has different PMU identifiers due to different hardware versions and types, but they may have some common PMU event. Since a Compat value can only match one identifier, when adding the same event alias to PMUs with different identifiers, each identifier needs to be defined once, which is not streamlined enough. So let "Compat" support using regular expression to match identifiers for uncore PMU alias. For example, if the "Compat" value is set to "43401|43c01", it would be able to match PMU identifiers such as "43401" or "43c01", which correspond to CMN600_r0p0 or CMN700_r0p0. Signed-off-by:
-
Namhyung Kim authored
The BTF func proto for a tracepoint has one more argument than the actual tracepoint function since it has a context argument at the begining. So it should compare to 5 when the tracepoint has 4 arguments. typedef void (*btf_trace_sched_switch)(void *, bool, struct task_struct *, struct task_struct *, unsigned int); Also, recent change in the perf tool would use a hand-written minimal vmlinux.h to generate BTF in the skeleton. So it won't have the info of the tracepoint. Anyway it should use the kernel's vmlinux BTF to check the type in the kernel. Fixes: b36888f7 ("perf record: Handle argument change in sched_switch") Reviewed-by:
Song Liu <song@kernel.org> Cc: Hao Luo <haoluo@google.com> CC: bpf@vger.kernel.org Link: https://lore.kernel.org/r/20230922234444.3115821-1-namhyung@kernel.orgSigned-off-by:
-
- 27 Sep, 2023 11 commits
-
-
Yang Jihong authored
When exit abnormally in process mode, customize SIGINT and SIGTERM signal handler to kill the forked child processes. Before: # perf bench sched messaging -l 1000000 -g 1 & [1] 8519 # # Running 'sched/messaging' benchmark: # pgrep sched-messaging | wc -l 41 # kill -15 8519 [1]+ Terminated perf bench sched messaging -l 1000000 -g 1 # pgrep sched-messaging | wc -l 40 After: # perf bench sched messaging -l 1000000 -g 1 & [1] 8472 # # Running 'sched/messaging' benchmark: # pgrep sched-messaging | wc -l 41 # kill -15 8472 [1]+ Exit 1 perf bench sched messaging -l 1000000 -g 1 # pgrep sched-messaging | wc -l 0 Signed-off-by:
Yang Jihong <yangjihong1@huawei.com> Reviewed-by:
-
Yang Jihong authored
To save pid of child processes when creating worker: 1. The messaging worker is changed to `union` type to store thread id and process pid. 2. Save child process pid in create_process_worker(). 3. Rename `pth_tab` as `work_tab`. Test result: # perf bench sched messaging # Running 'sched/messaging' benchmark: # 20 sender and receiver processes per group # 10 groups == 400 processes run Total time: 6.744 [sec] # perf bench sched messaging -t # Running 'sched/messaging' benchmark: # 20 sender and receiver threads per group # 10 groups == 400 threads run Total time: 5.788 [sec] Signed-off-by: -
Yang Jihong authored
Refactor the create_worker() helper: 1. Modify the return value and use pthread pointer as a parameter to facilitate value assignment in create_worker(). 2. The thread worker creation and process worker creation are abstracted into independent helpers. No functional change. Test result: # perf bench sched messaging # Running 'sched/messaging' benchmark: # 20 sender and receiver processes per group # 10 groups == 400 processes run Total time: 6.332 [sec] # perf bench sched messaging -t # Running 'sched/messaging' benchmark: # 20 sender and receiver threads per group # 10 groups == 400 threads run Total time: 5.545 [sec] Signed-off-by: -
Yang Jihong authored
Fixed several code style issues in sched-messaging: 1. Use one space around "-" and "+" operators. 2. When a long line is broken, the operator is at the end of the line. Signed-off-by:
-
Athira Rajeev authored
Running shellcheck on some of the shell scripts, throws below warning on shellcheck v0.6. Example: In tests/shell/coresight/asm_pure_loop.sh line 14: DATA="$DATD/perf-$TEST-$DATV.data" ^---^ SC2153: Possible misspelling: DATD may not be assigned, but DATA is. Here, DATD is exported from "lib/coresight.sh" and this warning can be ignored. Use "shellcheck disable=" to ignore this check. Signed-off-by: -
Athira Rajeev authored
Running shellcheck on stat+shadow_stat.sh generates below warning In tests/shell/stat+csv_summary.sh line 26: while read _num _event _run _pct ^--^ SC2034: _num appears unused. Verify use (or export if used externally). ^----^ SC2034: _event appears unused. Verify use (or export if used externally). ^--^ SC2034: _run appears unused. Verify use (or export if used externally). ^--^ SC2034: _pct appears unused. Verify use (or export if used externally). This variable is intentionally unused since it is needed to parse through the output. commit used "_" as a prefix for this throw away variable. But this stil shows warning with shellcheck v0.6. Fix this by only using "_" instead of prefix and variable name. Signed-off-by: -
Athira Rajeev authored
Running shellcheck on some of the shell scripts throws below error: In tests/shell/coresight/unroll_loop_thread_10.sh line 8: . "$(dirname $0)"/../lib/coresight.sh ^-- SC1090: Can't follow non-constant source. Use a directive to specify location. This happens on shellcheck version "0.6.0". Fix shellcheck warning for SC1090 using "shellcheck source="i option to mention the location of sourced files. Signed-off-by:
-
Colin Ian King authored
There is a spelling mistake in a pr_debug message. Fix it. (I didn't see this one in the first spell check scan I ran). Signed-off-by:
Colin Ian King <colin.i.king@gmail.com> Reviewed-by:
-
Ian Rogers authored
Dummy events are created with an attribute where the period and freq are zero. evsel__config will then see the uninitialized values and initialize them in evsel__default_freq_period. As fequency mode is used by default the dummy event would be set to use frequency mode. However, this has no effect on the dummy event but does cause unnecessary timers/interrupts. Avoid this overhead by setting the period to 1 for dummy events. evlist__add_aux_dummy calls evlist__add_dummy then sets freq=0 and period=1. This isn't necessary after this change and so the setting is removed. From Stephane: The dummy event is not counting anything. It is used to collect mmap records and avoid a race condition during the synthesize mmap phase of perf record. As such, it should not cause any overhead during active profiling. Yet, it did. Because of a bug the dummy event was programmed as a sampling event in frequency mode. Events in that mode incur more kernel overheads because on timer tick, the kernel has to look at the number of samples for each event and potentially adjust the sampling period to achieve the desired frequency. The dummy event was therefore adding a frequency event to task and ctx contexts we may otherwise not have any, e.g., perf record -a -e cpu/event=0x3c,period=10000000/. On each timer tick the perf_adjust_freq_unthr_context() is invoked and if ctx->nr_freq is non-zero, then the kernel will loop over ALL the events of the context looking for frequency mode ones. In doing, so it locks the context, and enable/disable the PMU of each hw event. If all the events of the context are in period mode, the kernel will have to traverse the list for nothing incurring overhead. The overhead is multiplied by a very large factor when this happens in a guest kernel. There is no need for the dummy event to be in frequency mode, it does not count anything and therefore should not cause extra overhead for no reason. Fixes: 5bae0250 ("perf evlist: Introduce perf_evlist__new_dummy constructor") Reported-by:
Stephane Eranian <eranian@google.com> Signed-off-by:
-
Charles Han authored
Remove the repeated word "of" in comments. Signed-off-by:
Charles Han <hanchunchao@inspur.com> Reviewed-by:
-
Ilkka Koskinen authored
This patch addresses review comments that were given for 705ed549 ("perf vendor events arm64: Add AmpereOne metrics") but didn't make it to the original patch [1][2] Changes include: A fix for backend_memory formula, use of standard metrics when possible, using #slots, renaming metrics to avoid spaces in the names, and cleanup. [1] https://lore.kernel.org/linux-perf-users/e9bdacb-a231-36af-6a2e-6918ee7effa@os.amperecomputing.com/ [2] https://lore.kernel.org/linux-perf-users/20230826192352.3043220-1-ilkka@os.amperecomputing.com/ Fixes: 705ed549 ("perf vendor events arm64: Add AmpereOne metrics") Signed-off-by:
Ilkka Koskinen <ilkka@os.amperecomputing.com> Reviewed-by:
-
- 21 Sep, 2023 2 commits
-
-
Veronika Molnarova authored
Machines with less then 4 CPUs weren't consistently triggering lock events required for the test. Skip the test on those machines. The limit of 4 CPUs is set as it generates around 100 lock events for a test. Signed-off-by:
Veronika Molnarova <vmolnaro@redhat.com> Acked-by:
Michael Petlan <mpetlan@redhat.com> Link: https://lore.kernel.org/r/20230919150419.23193-2-vmolnaro@redhat.comSigned-off-by:
-
Veronika Molnarova authored
The test was failing in specific scenarios due to imperfection of FP arithmetics. The `bc` command wasn't correctly rounding the result of division causing the failure. Replace the `bc` with `awk` which should work with more decimal places and add a threshold to catch any possible rounding errors. The acceptable rounding error is set to 0.01 when the test passes with a warning message. Signed-off-by:
-
- 20 Sep, 2023 1 commit
-
-
Xu Yang authored
The struct "pmu_events_table" has been changed after commit 2e255b4f (perf jevents: Group events by PMU, 2023-08-23). So there doesn't exist 'entries' in pmu_events_table anymore. This will align the members with that commit. Othewise, below errors will be printed when run jevent.py: pmu-events/pmu-events.c:5485:26: error: ‘struct pmu_metrics_table’ has no member named ‘entries’ 5485 | .entries = pmu_metrics__freescale_imx8dxl_sys, Signed-off-by:
Xu Yang <xu.yang_2@nxp.com> Reviewed-by:
-
- 18 Sep, 2023 7 commits
-
-
Ian Rogers authored
Fuzzing found that an invalid tracepoint name would create a memory leak with an address sanitizer build: ``` $ perf stat -e '*:o/' true event syntax error: '*:o/' \___ parser error Run 'perf list' for a list of valid events Usage: perf stat [<options>] [<command>] -e, --event <event> event selector. use 'perf list' to list available events ================================================================= ==59380==ERROR: LeakSanitizer: detected memory leaks Direct leak of 4 byte(s) in 2 object(s) allocated from: #0 0x7f38ac07077b in __interceptor_strdup ../../../../src/libsanitizer/asan/asan_interceptors.cpp:439 #1 0x55f2f41be73b in str util/parse-events.l:49 #2 0x55f2f41d08e8 in parse_events_lex util/parse-events.l:338 #3 0x55f2f41dc3b1 in parse_events_parse util/parse-events-bison.c:1464 #4 0x55f2f410b8b3 in parse_events__scanner util/parse-events.c:1822 #5 0x55f2f410d1b9 in __parse_events util/parse-events.c:2094 #6 0x55f2f410e57f in parse_events_option util/parse-events.c:2279 #7 0x55f2f4427b56 in get_value tools/lib/subcmd/parse-options.c:251 #8 0x55f2f4428d98 in parse_short_opt tools/lib/subcmd/parse-options.c:351 #9 0x55f2f4429d80 in parse_options_step tools/lib/subcmd/parse-options.c:539 #10 0x55f2f442acb9 in parse_options_subcommand tools/lib/subcmd/parse-options.c:654 #11 0x55f2f3ec99fc in cmd_stat tools/perf/builtin-stat.c:2501 #12 0x55f2f4093289 in run_builtin tools/perf/perf.c:322 #13 0x55f2f40937f5 in handle_internal_command tools/perf/perf.c:375 #14 0x55f2f4093bbd in run_argv tools/perf/perf.c:419 #15 0x55f2f409412b in main tools/perf/perf.c:535 SUMMARY: AddressSanitizer: 4 byte(s) leaked in 2 allocation(s). ``` Fix by adding the missing destructor. Fixes: 865582c3 ("perf tools: Adds the tracepoint name parsing support") Signed-off-by: -
Ian Rogers authored
Use perf version to detect whether BPF skeletons were enabled in a build rather than a failing perf record. Signed-off-by:
-
Ian Rogers authored
Add to run variable. Signed-off-by:
-
Ian Rogers authored
Fix a target name and set BUILD_BPF_SKEL to 0 rather than 1. Signed-off-by:
-
Ian Rogers authored
LIBBPF is dependent on zlib so move the NO_ZLIB and feature check early to avoid statically building when zlib is disabled. This avoids a linkage failure with perf and static libbpf when zlib isn't specified. Move BUILD_BPF_SKEL logic to one place and if not defined set BUILD_BPF_SKEL to 1. Detect dependencies of building with BPF skeletons and warn/disable if the dependencies aren't present. Change Makefile.perf to contain BPF skeleton logic dependent on the Makefile.config result and refresh the comment about BUILD_BPF_SKEL. Signed-off-by:
-
Ian Rogers authored
Add status for BPF skeletons, to see if a build has them enabled: ``` $ perf version --build-options perf version 6.6.rc1.g0381ae36d1a6 dwarf: [ OFF ] # HAVE_DWARF_SUPPORT dwarf_getlocations: [ OFF ] # HAVE_DWARF_GETLOCATIONS_SUPPORT syscall_table: [ on ] # HAVE_SYSCALL_TABLE_SUPPORT libbfd: [ OFF ] # HAVE_LIBBFD_SUPPORT debuginfod: [ OFF ] # HAVE_DEBUGINFOD_SUPPORT libelf: [ OFF ] # HAVE_LIBELF_SUPPORT libnuma: [ OFF ] # HAVE_LIBNUMA_SUPPORT numa_num_possible_cpus: [ OFF ] # HAVE_LIBNUMA_SUPPORT libperl: [ on ] # HAVE_LIBPERL_SUPPORT libpython: [ on ] # HAVE_LIBPYTHON_SUPPORT libslang: [ on ] # HAVE_SLANG_SUPPORT libcrypto: [ on ] # HAVE_LIBCRYPTO_SUPPORT libunwind: [ OFF ] # HAVE_LIBUNWIND_SUPPORT libdw-dwarf-unwind: [ OFF ] # HAVE_DWARF_SUPPORT zlib: [ on ] # HAVE_ZLIB_SUPPORT lzma: [ on ] # HAVE_LZMA_SUPPORT get_cpuid: [ on ] # HAVE_AUXTRACE_SUPPORT bpf: [ OFF ] # HAVE_LIBBPF_SUPPORT aio: [ on ] # HAVE_AIO_SUPPORT zstd: [ on ] # HAVE_ZSTD_SUPPORT libpfm4: [ on ] # HAVE_LIBPFM libtraceevent: [ on ] # HAVE_LIBTRACEEVENT bpf_skeletons: [ OFF ] # HAVE_BPF_SKEL ``` Signed-off-by: -
Yang Li authored
./tools/perf/util/bpf_kwork_top.c:120:53-58: WARNING: conversion to bool not needed here Signed-off-by:
Yang Li <yang.lee@linux.alibaba.com> Cc: bpf@vger.kernel.org Link: https://lore.kernel.org/r/20230915063832.120274-1-yang.lee@linux.alibaba.comSigned-off-by:
-
- 17 Sep, 2023 1 commit
-
-
Yang Jihong authored
For kernel that supports PERF_FORMAT_LOST, attr->read_format has PERF_FORMAT_LOST bit. Update expected value of attr->read_format of test-record-dummy-C0 for this scenario. Before: # ./perf test 17 -vv 17: Setup struct perf_event_attr : --- start --- test child forked, pid 1609441 <SNIP> running './tests/attr/test-record-dummy-C0' 'PERF_TEST_ATTR=/tmp/tmpm3s60aji ./perf record -o /tmp/tmpm3s60aji/perf.data --no-bpf-event -e dummy -C 0 kill >/dev/null 2>&1' ret '1', expected '1' expected read_format=4, got 20 FAILED './tests/attr/test-record-dummy-C0' - match failure test child finished with -1 ---- end ---- Setup struct perf_event_attr: FAILED! After: # ./perf test 17 -vv 17: Setup struct perf_event_attr : --- start --- test child forked, pid 1609441 <SNIP> running './tests/attr/test-record-dummy-C0' 'PERF_TEST_ATTR=/tmp/tmppa9vxcb7 ./perf record -o /tmp/tmppa9vxcb7/perf.data --no-bpf-event -e dummy -C 0 kill >/dev/null 2>&1' ret '1', expected '1' <SNIP> test child finished with 0 ---- end ---- Setup struct perf_event_attr: Ok Reported-and-Tested-by:
-
- 15 Sep, 2023 4 commits
-
-
Colin Ian King authored
There is a spelling mistake in a literal string. Fix it. Signed-off-by:
-
Namhyung Kim authored
Instructions with sign- and zero- extention like movsbl and movzwq were not handled properly. As it can check different size suffix (-b, -w, -l or -q) we can omit that and add the common parts even though some combinations are not possible. Reviewed-by:
-
James Clark authored
pmu_events_table__find() is no longer used so remove it and its Arm specific version. Signed-off-by:
James Clark <james.clark@arm.com> Reviewed-by:
-
James Clark authored
Currently the while loop always either exits on the first iteration with a core PMU, or exits with NULL on heterogeneous systems or when not all CPUs are online. Both of the latter behaviors are undesirable for platforms other than Arm so simplify it to always return the first core PMU, or NULL if none exist. This behavior was depended on by the Arm version of pmu_metrics_table__find(), so the logic has been moved there instead. Signed-off-by:
-
