- 08 Jan, 2024 1 commit
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Arnaldo Carvalho de Melo authored
Acked-by:
Ingo Molnar <mingo@elte.hu> Acked-by:
Linus Torvalds <torvalds@linux-foundation.org> Acked-by:
Namhyung Kim <namhyung@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Link: https://lore.kernel.org/lkml/ZZxbCeVPnOjShbMQ@kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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- 04 Jan, 2024 9 commits
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Thomas Richter authored
perf test 17 'Setup struct perf_event_attr' fails on s390 z/VM guest, using linux-next kernel. Root cause is the fall-back from hardware counter cycles perf_event_attr: type 0 (PERF_TYPE_HARDWARE) size 136 config 0 (PERF_COUNT_HW_CPU_CYCLES) { sample_period, sample_freq } 4000 sample_type IP|TID|TIME|ADDR|PERIOD|DATA_SRC read_format ID|LOST which returns -ENOENT on s390 z/VM guest. This causes the code to fall back to software counter task-clock, as can be seen in the debug output: ------------------------------------------------------------ perf_event_attr: type 1 (PERF_TYPE_SOFTWARE) size 136 config 0x1 (PERF_COUNT_SW_TASK_CLOCK) <-here { sample_period, sample_freq } 4000 sample_type IP|TID|TIME|ADDR|PERIOD|DATA_SRC read_format ID|LOST This succeeds on s390 z/VM guest. This successful installation of the counter task-clock is not listed in the expected results and the test case fails. This is caused by commit eb2eac0c ("perf evsel: Fallback to "task-clock" when not system wide") which introduced fall back from event 'cycles' to event 'task-clock'. To fix this on s390 allow event number 0 (cycles) and event number 1 (task-clock) as expected result. Output before: # ./perf test -Fv 17 17: Setup struct perf_event_attr : --- start --- running './tests/attr/test-stat-group1' unsupp './tests/attr/test-stat-group1' running './tests/attr/test-record-graph-default' test limitation '!aarch64' excluded architecture list ['aarch64'] expected config=0, got 1 FAILED './tests/attr/test-record-graph-default' - match failure ---- end ---- Setup struct perf_event_attr: FAILED! # Output after: # ./perf test -F 17 17: Setup struct perf_event_attr : Ok # Fixes: eb2eac0c ("perf evsel: Fallback to "task-clock" when not system wide") Signed-off-by:Thomas Richter <tmricht@linux.ibm.com> Acked-by:
Ian Rogers <irogers@google.com> Cc: Alexander Gordeev <agordeev@linux.ibm.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Sumanth Korikkar <sumanthk@linux.ibm.com> Cc: Sven Schnelle <svens@linux.ibm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Link: https://lore.kernel.org/r/20231219143235.1075522-1-tmricht@linux.ibm.comSigned-off-by:
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Ben Gainey authored
The addr_location map and maps fields in the inner loop were missing calls to map__get()/maps__get(). The subsequent addr_location__exit() call in each loop puts the map/maps fields causing use-after-free aborts. This issue reproduces on at least arm64 and x86_64 with something simple like `perf record -g ls` followed by `perf script -s script.py` with the following script: perf_db_export_mode = True perf_db_export_calls = False perf_db_export_callchains = True def sample_table(*args): print(f'sample_table({args})') def call_path_table(*args): print(f'call_path_table({args}') Committer testing: This test, just introduced by Ian Rogers, now passes, not segfaulting anymore: # perf test "perf script tests" 95: perf script tests : Ok # Fixes: 0dd5041c ("perf addr_location: Add init/exit/copy functions") Signed-off-by:Ben Gainey <ben.gainey@arm.com> Tested-by:
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Ian Rogers authored
Start a new set of shell tests for testing perf script. The initial contribution is checking that some perf db-export functionality works as reported in this regression by Ben Gainey <ben.gainey@arm.com>: https://lore.kernel.org/lkml/20231207140911.3240408-1-ben.gainey@arm.com/Signed-off-by:
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Ian Rogers authored
uniq() will write one command name over another causing the overwritten string to be leaked. Fix by doing a pass that removes duplicates and a second that removes the holes. Signed-off-by:
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Ahelenia Ziemiańska authored
In its infinite wisdom, by default, SLang sets susp undef, and this can only be un-done by calling SLtty_set_suspend_state(true). After every SLang_init_tty(). Additionally, no provisions are made for maintaining the teletype attributes across suspend/continue (outside of curses emulation mode(?!), which provides full support, naturally), so we need to save and restore the flags ourselves, as well as reset the text colours when going under. We need to also re-draw the screen, and raising SIGWINCH, shockingly, Just Works. The correct solution would be to Not Use SLang, but as a stop-gap, this makes TUI 'perf report' usable. Signed-off-by:
Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz> Tested-by:
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Ian Rogers authored
Update to v1.17 released in: https://github.com/intel/perfmon/pull/123 Add events FP_ARITH_DISPATCHED.V0, FP_ARITH_DISPATCHED.V1, FP_ARITH_DISPATCHED.V2, UNC_IIO_IOMMU0.1G_HITS, UNC_IIO_IOMMU0.2M_HITS and UNC_IIO_IOMMU0.4K_HITS. Description updates. Signed-off-by:
Kan Liang <kan.liang@linux.intel.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Edward Baker <edward.baker@intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/r/20240104074259.653219-4-irogers@google.comSigned-off-by:
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Ian Rogers authored
Update to v1.23 released in: https://github.com/intel/perfmon/pull/123 Updates to event descriptions. Signed-off-by:
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Ian Rogers authored
Update to v1.02 released in: https://github.com/intel/perfmon/pull/123 Removes events AMX_OPS_RETIRED.BF16 and AMX_OPS_RETIRED.INT8. Add events FP_ARITH_DISPATCHED.V0, FP_ARITH_DISPATCHED.V1, FP_ARITH_DISPATCHED.V2, UNC_IIO_IOMMU0.1G_HITS, UNC_IIO_IOMMU0.2M_HITS and UNC_IIO_IOMMU0.4K_HITS. Description updates. Signed-off-by:
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Ian Rogers authored
Fix that the core PMU is being specified for 2 uncore events. Specify a PMU for the alderlake UNCORE_FREQ metric. Conversion script updated in: https://github.com/intel/perfmon/pull/126 Committer testing: Before this patch the "perf all metricgroups test" was failing, now: root@number:~# perf test metric 10: PMU events : 10.3: Parsing of PMU event table metrics : Ok 10.4: Parsing of PMU event table metrics with fake PMUs : Ok 10.5: Parsing of metric thresholds with fake PMUs : Ok 61: Parse and process metrics : Ok 98: perf stat metrics (shadow stat) test : Skip 101: perf all metricgroups test : Ok 102: perf all metrics test : FAILED! 107: perf metrics value validation : Ok root@number:~# Test 102 is failing for another reason, not being able to get as many counters as needed, Ian Rogers suggested disabling the NMI watchdog to have more counters available: root@number:/home/acme# cat /proc/sys/kernel/nmi_watchdog 1 root@number:/home/acme# echo 0 > /proc/sys/kernel/nmi_watchdog root@number:/home/acme# perf test 102 102: perf all metrics test : Ok root@number:/home/acme# Closes: https://lore.kernel.org/lkml/ZZWOdHXJJ_oecWwm@kernel.org/Reported-by:
Arnaldo Carvalho de Melo <acme@kernel.org> Reviewed-by:
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- 03 Jan, 2024 6 commits
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Ian Rogers authored
The cpu-cycles event is both a legacy event and declared in /sys/devices/cpu_core/events/cpu-cycles. The cycles event is a legacy event but with no sysfs version. Add a test that the sysfs version is preferred to the legacy for cpu-cycles, while for cycles we use the legacy version. Suggested-by:
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Ian Rogers authored
The legacy events cpu-cycles and instructions have sysfs event equivalents on x86 (see /sys/devices/cpu_core/events). As sysfs/JSON events are now higher in priority than legacy events this causes the hybrid test expectations not to be met. To fix this switch to legacy events that don't have sysfs versions, namely cpu-cycles becomes cycles and instructions becomes branches. Fixes: a24d9d9d ("perf parse-events: Make legacy events lower priority than sysfs/JSON") Reported-by:
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Sandipan Das authored
Make the jevents parser aware of the Unified Memory Controller (UMC) PMU and add events taken from Section 8.2.1 "UMC Performance Monitor Events" of the Processor Programming Reference (PPR) for AMD Family 19h Model 11h processors. The events capture UMC command activity such as CAS, ACTIVATE, PRECHARGE etc. while the metrics derive data bus utilization and memory bandwidth out of these events. Signed-off-by:
Sandipan Das <sandipan.das@amd.com> Acked-by:
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Ian Rogers authored
Copy-paste error where LL cache misses are reported as l1i. Fixes: 0a57b910 ("perf stat: Use counts rather than saved_value") Suggested-by:
Guillaume Endignoux <guillaumee@google.com> Reviewed-by:
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Ian Rogers authored
Reduce from PERF_SAMPLE_MAX_SIZE to "sizeof(*lost) + session->machines.host.id_hdr_size". Suggested-by:
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Ian Rogers authored
Add variants of perf_env__insert_bpf_prog_info(), perf_env__insert_btf() and perf_env__find_btf prefixed with __ to indicate the env->bpf_progs.lock is assumed held. Call these variants when the lock is held to avoid recursively taking it and potentially having a thread deadlock with itself. Fixes: f8dfeae0 ("perf bpf: Show more BPF program info in print_bpf_prog_info()") Signed-off-by:
Jiri Olsa <jolsa@kernel.org> Acked-by:
Song Liu <song@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Huacai Chen <chenhuacai@kernel.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: K Prateek Nayak <kprateek.nayak@amd.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Ming Wang <wangming01@loongson.cn> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@amd.com> Link: https://lore.kernel.org/r/20231207014655.1252484-1-irogers@google.comSigned-off-by:
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- 24 Dec, 2023 15 commits
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Namhyung Kim authored
This is for a debugging purpose. It'd be useful to see per-instrucion level success/failure stats. $ perf annotate --data-type --insn-stat Annotate Instruction stats total 264, ok 143 (54.2%), bad 121 (45.8%) Name : Good Bad ----------------------------------------------------------- movq : 45 31 movl : 22 11 popq : 0 19 cmpl : 16 3 addq : 8 7 cmpq : 11 3 cmpxchgl : 3 7 cmpxchgq : 8 0 incl : 3 3 movzbl : 4 2 incq : 4 2 decl : 6 0 ... Committer notes: So these are about being able to find the type for accesses from these instructions, we should improve the naming, but it is for debugging, we can improve this later: @@ -3726,6 +3759,10 @@ struct annotated_data_type *hist_entry__get_data_type(struct hist_entry *he) continue; mem_type = find_data_type(ms, ip, op_loc->reg, op_loc->offset); + if (mem_type) + istat->good++; + else + istat->bad++; Signed-off-by: -
Namhyung Kim authored
The --type-stat option is to be used with --data-type and to print detailed failure reasons for the data type annotation. $ perf annotate --data-type --type-stat Annotate data type stats: total 294, ok 116 (39.5%), bad 178 (60.5%) ----------------------------------------------------------- 30 : no_sym 40 : no_insn_ops 33 : no_mem_ops 63 : no_var 4 : no_typeinfo 8 : bad_offset Signed-off-by: -
Namhyung Kim authored
When events are grouped together, it'd be natural to show them at once like in other mode. Handle group leaders with members to collect the number of samples together and display like below: $ perf annotate --data-type --group ... Annotate type: 'struct page' in vmlinux (1 samples): event[0] = cpu/mem-loads,ldlat=30/P event[1] = cpu/mem-stores/P event[2] = dummy:u ============================================================================ samples offset size field 1 0 0 0 64 struct page { 0 0 0 0 8 long unsigned int flags; 0 0 0 8 40 union { 0 0 0 8 40 struct { 0 0 0 8 16 union { 0 0 0 8 16 struct list_head lru { 0 0 0 8 8 struct list_head* next; 0 0 0 16 8 struct list_head* prev; }; 0 0 0 8 16 struct { 0 0 0 8 8 void* __filler; 0 0 0 16 4 unsigned int mlock_count; }; 0 0 0 8 16 struct list_head buddy_list { 0 0 0 8 8 struct list_head* next; 0 0 0 16 8 struct list_head* prev; }; Signed-off-by: -
Namhyung Kim authored
Support data type annotation with new --data-type option. It internally uses type sort key to collect sample histogram for the type and display every members like below. $ perf annotate --data-type ... Annotate type: 'struct cfs_rq' in [kernel.kallsyms] (13 samples): ============================================================================ samples offset size field 13 0 640 struct cfs_rq { 2 0 16 struct load_weight load { 2 0 8 unsigned long weight; 0 8 4 u32 inv_weight; }; 0 16 8 unsigned long runnable_weight; 0 24 4 unsigned int nr_running; 1 28 4 unsigned int h_nr_running; ... For simplicity it prints the number of samples per field for now. But it should be easy to show the overhead percentage instead. The number at the outer struct is a sum of the numbers of the inner members. For example, struct cfs_rq got total 13 samples, and 2 came from the load (struct load_weight) and 1 from h_nr_running. Similarly, the struct load_weight got total 2 samples and they all came from the weight field. I've added two new flags in the symbol_conf for this. The annotate_data_member is to get the members of the type. This is also needed for perf report with typeoff sort key. The annotate_data_sample is to update sample stats for each offset and used only in annotate. Currently it only support stdio output mode, TUI support can be added later. Committer testing: With the perf.data from the previous csets, a very simple, short duration one: # perf annotate --data-type Annotate type: 'struct list_head' in [kernel.kallsyms] (1 samples): ============================================================================ samples offset size field 1 0 16 struct list_head { 0 0 8 struct list_head* next; 1 8 8 struct list_head* prev; }; Annotate type: 'char' in [kernel.kallsyms] (1 samples): ============================================================================ samples offset size field 1 0 1 char ; # Signed-off-by: -
Namhyung Kim authored
The symoff sort key is to print symbol and offset of sample. This is useful for data type profiling to show exact instruction in the function which refers the data. $ perf report -s type,sym,typeoff,symoff --hierarchy ... # Overhead Data Type / Symbol / Data Type Offset / Symbol Offset # .............. ..................................................... # 1.23% struct cfs_rq 0.84% update_blocked_averages 0.19% struct cfs_rq +336 (leaf_cfs_rq_list.next) 0.19% [k] update_blocked_averages+0x96 0.19% struct cfs_rq +0 (load.weight) 0.14% [k] update_blocked_averages+0x104 0.04% [k] update_blocked_averages+0x31c 0.17% struct cfs_rq +404 (throttle_count) 0.12% [k] update_blocked_averages+0x9d 0.05% [k] update_blocked_averages+0x1f9 0.08% struct cfs_rq +272 (propagate) 0.07% [k] update_blocked_averages+0x3d3 0.02% [k] update_blocked_averages+0x45b ... Committer testing: # perf report --stdio -s type,typeoff,symoff # To display the perf.data header info, please use --header/--header-only options. # # # Total Lost Samples: 0 # # Samples: 4 of event 'cpu_atom/mem-loads,ldlat=30/P' # Event count (approx.): 7 # # Overhead Data Type Data Type Offset Symbol Offset # ........ ......... ................ ............. # 42.86% struct list_head struct list_head +8 (prev) [k] __list_del_entry_valid_or_report+0x7 28.57% (unknown) (unknown) +0 (no field) [.] _nl_intern_locale_data+0x25 14.29% char char +0 (no field) [k] strncpy_from_user+0xa5 14.29% (unknown) (unknown) +0 (no field) [.] _dl_lookup_symbol_x+0x50 # # (Tip: To change sampling frequency to 100 Hz: perf record -F 100) # Signed-off-by: -
Namhyung Kim authored
The typeoff sort key shows the data type name, offset and the name of the field. This is useful to see which field in the struct is accessed most frequently. $ perf report -s type,typeoff --hierarchy --stdio ... # Overhead Data Type / Data Type Offset # ............ ............................ # ... 1.23% struct cfs_rq 0.19% struct cfs_rq +404 (throttle_count) 0.19% struct cfs_rq +0 (load.weight) 0.19% struct cfs_rq +336 (leaf_cfs_rq_list.next) 0.09% struct cfs_rq +272 (propagate) 0.09% struct cfs_rq +196 (removed.nr) 0.09% struct cfs_rq +80 (curr) 0.09% struct cfs_rq +544 (lt_b_children_throttled) 0.06% struct cfs_rq +320 (rq) Committer testing: Again with the perf.data from the previous csets: # perf report --stdio -s type,typeoff # To display the perf.data header info, please use --header/--header-only options. # # # Total Lost Samples: 0 # # Samples: 4 of event 'cpu_atom/mem-loads,ldlat=30/P' # Event count (approx.): 7 # # Overhead Data Type Data Type Offset # ........ ......... ................ # 42.86% struct list_head struct list_head +8 (prev) 42.86% (unknown) (unknown) +0 (no field) 14.29% char char +0 (no field) # # (Tip: To see callchains in a more compact form: perf report -g folded) # # perf report --stdio -s dso,type,typeoff # To display the perf.data header info, please use --header/--header-only options. # # # Total Lost Samples: 0 # # Samples: 4 of event 'cpu_atom/mem-loads,ldlat=30/P' # Event count (approx.): 7 # # Overhead Shared Object Data Type Data Type Offset # ........ .................... ......... ................ # 42.86% [kernel.kallsyms] struct list_head struct list_head +8 (prev) 28.57% libc.so.6 (unknown) (unknown) +0 (no field) 14.29% [kernel.kallsyms] char char +0 (no field) 14.29% ld-linux-x86-64.so.2 (unknown) (unknown) +0 (no field) # # (Tip: If you have debuginfo enabled, try: perf report -s sym,srcline) # # Signed-off-by: -
Namhyung Kim authored
The annotated_data_type__update_samples() to get histogram for data type access. It'll be called by perf annotate to show which fields in the data type are accessed frequently. Signed-off-by:
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Namhyung Kim authored
Add child member field if the current type is a composite type like a struct or union. The member fields are linked in the children list and do the same recursively if the child itself is a composite type. Add 'self' member to the annotated_data_type to handle the members in the same way. Signed-off-by:
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Namhyung Kim authored
Enable type annotation when the 'type' sort key is used. It shows type of variables the samples access at the moment. Users can see which types are accessed frequently. $ perf report -s dso,type --stdio ... # Overhead Shared Object Data Type # ........ ................. ......... # 35.47% [kernel.kallsyms] (unknown) 1.62% [kernel.kallsyms] struct sched_entry 1.23% [kernel.kallsyms] struct cfs_rq 0.83% [kernel.kallsyms] struct task_struct 0.34% [kernel.kallsyms] struct list_head 0.30% [kernel.kallsyms] struct mem_cgroup ... Committer testing: With the perf.data file collected in the previous cset: # perf report --stdio -s type # To display the perf.data header info, please use --header/--header-only options. # # # Total Lost Samples: 0 # # Samples: 4 of event 'cpu_atom/mem-loads,ldlat=30/P' # Event count (approx.): 7 # # Overhead Data Type # ........ ......... # 42.86% struct list_head 42.86% (unknown) 14.29% char # # (Tip: To record callchains for each sample: perf record -g) # # perf report --stdio -s dso,type # To display the perf.data header info, please use --header/--header-only options. # # # Total Lost Samples: 0 # # Samples: 4 of event 'cpu_atom/mem-loads,ldlat=30/P' # Event count (approx.): 7 # # Overhead Shared Object Data Type # ........ .................... ......... # 42.86% [kernel.kallsyms] struct list_head 28.57% libc.so.6 (unknown) 14.29% [kernel.kallsyms] char 14.29% ld-linux-x86-64.so.2 (unknown) # # (Tip: Save output of perf stat using: perf stat record <target workload>) # # Signed-off-by: -
Namhyung Kim authored
The 'type' sort key is to aggregate hist entries by data type they access. Add mem_type field to hist_entry struct to save the type. If hist_entry__get_data_type() returns NULL, it'd use the 'unknown_type' instance. Committer testing: Before: # perf mem record sleep 2s [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.037 MB perf.data (4 samples) ] root@number:/home/acme/Downloads# perf report --stdio -s type Error: Unknown --sort key: `type' Usage: perf report [<options>] -s, --sort <key[,key2...]> sort by key(s): overhead overhead_sys overhead_us overhead_guest_sys overhead_guest_us overhead_children sample period pid comm dso symbol parent cpu socket srcline srcfile local_weight weight transaction trace symbol_size dso_size cgroup cgroup_id ipc_null time code_page_size local_ins_lat ins_lat local_p_stage_cyc p_stage_cyc addr local_retire_lat retire_lat simd dso_from dso_to symbol_from symbol_to mispredict abort in_tx cycles srcline_from srcline_to ipc_lbr addr_from addr_to symbol_daddr dso_daddr locked tlb mem snoop dcacheline symbol_iaddr phys_daddr data_page_size blocked # After: # perf report --stdio -s type # To display the perf.data header info, please use --header/--header-only options. # # # Total Lost Samples: 0 # # Samples: 4 of event 'cpu_atom/mem-loads,ldlat=30/P' # Event count (approx.): 7 # # Overhead Data Type # ........ ......... # 100.00% (unknown) # # (Tip: Print event counts in CSV format with: perf stat -x,) # # rpm -q kernel-debuginfo kernel-debuginfo-6.6.4-200.fc39.x86_64 # uname -r 6.6.4-200.fc39.x86_64 # Signed-off-by: -
Namhyung Kim authored
It's the function to find out the type info from the given sample data and will be called from the hist_entry sort logic when 'type' sort key is used. It first calls objdump to disassemble the instructions and figure out information about memory access at the location. Maybe we can do it better by analyzing the instruction directly, but I'll leave it for later work. The memory access is determined by checking instruction operands to have "(" and then extract register name and offset. It'll return NULL if no data type is found. Signed-off-by: -
Namhyung Kim authored
The annotate_get_insn_location() is to get the detailed information of instruction locations like registers and offset. It has source and target operands locations in an array. Each operand can have a register and an offset. The offset is meaningful when mem_ref flag is set. Signed-off-by:
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Namhyung Kim authored
The evsel__get_arch() is to get architecture info from the environment. It'll be used by other places later so let's factor it out. Also add arch__is() to check the arch info by name. Committer notes: "get" is usually associated with refcounting, so we better rename this at some point to a better name. Signed-off-by:
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Namhyung Kim authored
To aggregate accesses to the same data type, add 'data_types' tree in DSO to maintain data types and find it by name and size. It might have different data types that happen to have the same name, so it also compares the size of the type. Even if it doesn't 100% guarantee, it reduces the possibility of mis-handling of such conflicts. And I don't think it's common to have different types with the same name. Committer notes: Very few cases on the Linux kernel, but there are some different types with the same name, unsure if there is a debug mode in libbpf dedup that warns about such cases, but there are provisions in pahole for that, see: "emit: Notice type shadowing, i.e. multiple types with the same name (enum, struct, union, etc)" https://git.kernel.org/pub/scm/devel/pahole/pahole.git/commit/?id=4f332dbfd02072e4f410db7bdcda8d6e3422974b $ pahole --compile > vmlinux.h $ rm -f a ; make a cc a.c -o a $ grep __[0-9] vmlinux.h union irte__1 { struct map_info__1; struct map_info__1 { struct map_info__1 * next; /* 0 8 */ $ drivers/iommu/amd/amd_iommu_types.h 'union irte' include/linux/dmar.h 'struct irte' include/linux/device-mapper.h: union map_info { void *ptr; }; include/linux/mtd/map.h: struct map_info { const char *name; unsigned long size; resource_size_t phys; <SNIP> kernel/events/uprobes.c: struct map_info { struct map_info *next; struct mm_struct *mm; unsigned long vaddr; }; Signed-off-by: -
Namhyung Kim authored
The find_data_type() is to get a data type from the memory access at the given address (IP) using a register and an offset. It requires DWARF debug info in the DSO and searches the list of variables and function parameters in the scope. In a pseudo code, it does basically the following: find_data_type(dso, ip, reg, offset) { pc = map__rip_2objdump(ip); CU = dwarf_addrdie(dso->dwarf, pc); scopes = die_get_scopes(CU, pc); for_each_scope(S, scopes) { V = die_find_variable_by_reg(S, pc, reg); if (V && V.type == pointer_type) { T = die_get_real_type(V); if (offset < T.size) return T; } } return NULL; } Committer notes: The 'size' variable in check_variable() is 64-bit, so use PRIu64 and inttypes.h to debug it. Ditto at find_data_type_die(). Signed-off-by:
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- 23 Dec, 2023 2 commits
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Namhyung Kim authored
The get_dwarf_regnum() returns a DWARF register number from a register name string according to the psABI. Also add two pseudo encodings of DWARF_REG_PC which is a register that are used by PC-relative addressing and DWARF_REG_FB which is a frame base register. They need to be handled in a special way. Signed-off-by:
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Namhyung Kim authored
The die_get_typename_from_type() is to get the name of the given DIE in C-style type name. The difference from die_get_typename() is that it does not retrieve the DW_AT_type and use the given DIE directly. This will be used when users know the type DIE already. Signed-off-by:
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- 21 Dec, 2023 2 commits
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JiaLong.Yang authored
HX-C2000 is a new CPU made by HEXIN Technologies Co., Ltd. And a new PVN 0x0066 has been applied from the OpenPower Community for this CPU. Here is a patch to make perf tool run in the CPU. Reviewed-by:
Madhavan Srinivasan <maddy@linux.ibm.com> Signed-off-by:
JiaLong.Yang <jialong.yang@shingroup.cn> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: shenghui.qu@shingroup.cn Cc: Zhao Ke <ke.zhao@shingroup.cn> Cc: zhijie.ren@shingroup.cn Link: https://lore.kernel.org/r/20231221060242.4532-1-jialong.yang@shingroup.cnSigned-off-by:
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Jing Zhang authored
cmn.json contains UTF-8 characters in brief description which could break the perf build on some distros. Fix this issue by removing the UTF-8 characters from cmn.json. without this fix: $find tools/perf/pmu-events/ -name "*.json" | xargs file -i | grep -v us-ascii tools/perf/pmu-events/arch/arm64/arm/cmn/sys/cmn.json: application/json; charset=utf-8 with it: $ file -i tools/perf/pmu-events/arch/arm64/arm/cmn/sys/cmn.json tools/perf/pmu-events/arch/arm64/arm/cmn/sys/cmn.json: text/plain; charset=us-ascii Fixes: 0b4de7bd ("perf jevents: Add support for Arm CMN PMU aliasing") Reported-by:
Arnaldo Carvalho de Melo <acme@kernel.com> Signed-off-by:
Jing Zhang <renyu.zj@linux.alibaba.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Ian Rogers <irogers@google.com> Cc: Jing Zhang <renyu.zj@linux.alibaba.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kajol Jain <kjain@linux.ibm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Cc: Thomas Richter <tmricht@linux.ibm.com> Link: https://lore.kernel.org/r/1703138593-50486-1-git-send-email-renyu.zj@linux.alibaba.comSigned-off-by:
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- 20 Dec, 2023 5 commits
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Ian Rogers authored
Maps are sometimes made overlapping, in particular kernel maps. If the end of a map overlaps the start of the next, shorten the overlapping map. This should remove potential non-determinism in maps__find, ie finding maps by address. Signed-off-by:
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Ian Rogers authored
Avoid exposing the implementation of maps so that the internals can be refactored. Signed-off-by:
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Ian Rogers authored
Use to remove map_rb_node use from machine.c. Signed-off-by:
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Ian Rogers authored
Avoid bpf_lock_contention_read touching the internal maps data structure by adding a helper function. As access is done directly on the map in maps, hold the read lock to stop it being removed. Signed-off-by:
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Ian Rogers authored
Rename maps__clone() to maps__copy_from() to be more intention revealing of its behavior. Pass the underlying maps rather than the thread. Signed-off-by:
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