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https://github.com/torvalds/linux
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9fbb4b0230
Add a new branch filter, "counter", for the branch counter option. It is
used to mark the events which should be logged in the branch. If it is
applied with the -j option, the counters of all the events should be
logged in the branch. If the legacy kernel doesn't support the new
branch sample type, switching off the branch counter filter.
The stored counter values in each branch are displayed right after the
regular branch stack information via perf report -D.
Usage examples:
# perf record -e "{branch-instructions,branch-misses}:S" -j any,counter
Only the first event, branch-instructions, collect the LBR. Both
branch-instructions and branch-misses are marked as logged events. The
occurrences information of them can be found in the branch stack
extension space of each branch.
# perf record -e "{cpu/branch-instructions,branch_type=any/,cpu/branch-misses,branch_type=counter/}"
Only the first event, branch-instructions, collect the LBR. Only the
branch-misses event is marked as a logged event.
Committer notes:
I noticed 'perf test "Sample parsing"' failing, reported to the list and
Kan provided a patch that checks if the evsel has a leader and that
evsel->evlist is set, the comment in the source code further explains
it.
Reviewed-by: Ian Rogers <irogers@google.com>
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: Alexey Bayduraev <alexey.v.bayduraev@linux.intel.com>
Cc: Andi Kleen <ak@linux.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>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tinghao Zhang <tinghao.zhang@intel.com>
Link: https://lore.kernel.org/r/20231025201626.3000228-8-kan.liang@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
135 lines
2.7 KiB
C
135 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __PERF_SAMPLE_H
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#define __PERF_SAMPLE_H
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#include <linux/perf_event.h>
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#include <linux/types.h>
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/* number of register is bound by the number of bits in regs_dump::mask (64) */
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#define PERF_SAMPLE_REGS_CACHE_SIZE (8 * sizeof(u64))
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struct regs_dump {
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u64 abi;
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u64 mask;
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u64 *regs;
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/* Cached values/mask filled by first register access. */
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u64 cache_regs[PERF_SAMPLE_REGS_CACHE_SIZE];
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u64 cache_mask;
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};
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struct stack_dump {
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u16 offset;
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u64 size;
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char *data;
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};
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struct sample_read_value {
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u64 value;
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u64 id; /* only if PERF_FORMAT_ID */
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u64 lost; /* only if PERF_FORMAT_LOST */
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};
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struct sample_read {
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u64 time_enabled;
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u64 time_running;
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union {
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struct {
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u64 nr;
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struct sample_read_value *values;
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} group;
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struct sample_read_value one;
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};
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};
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static inline size_t sample_read_value_size(u64 read_format)
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{
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/* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
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if (read_format & PERF_FORMAT_LOST)
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return sizeof(struct sample_read_value);
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else
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return offsetof(struct sample_read_value, lost);
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}
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static inline struct sample_read_value *next_sample_read_value(struct sample_read_value *v, u64 read_format)
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{
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return (void *)v + sample_read_value_size(read_format);
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}
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#define sample_read_group__for_each(v, nr, rf) \
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for (int __i = 0; __i < (int)nr; v = next_sample_read_value(v, rf), __i++)
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#define MAX_INSN 16
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struct aux_sample {
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u64 size;
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void *data;
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};
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struct simd_flags {
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u64 arch:1, /* architecture (isa) */
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pred:2; /* predication */
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};
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/* simd architecture flags */
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#define SIMD_OP_FLAGS_ARCH_SVE 0x01 /* ARM SVE */
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/* simd predicate flags */
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#define SIMD_OP_FLAGS_PRED_PARTIAL 0x01 /* partial predicate */
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#define SIMD_OP_FLAGS_PRED_EMPTY 0x02 /* empty predicate */
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struct perf_sample {
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u64 ip;
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u32 pid, tid;
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u64 time;
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u64 addr;
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u64 id;
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u64 stream_id;
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u64 period;
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u64 weight;
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u64 transaction;
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u64 insn_cnt;
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u64 cyc_cnt;
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u32 cpu;
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u32 raw_size;
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u64 data_src;
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u64 phys_addr;
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u64 data_page_size;
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u64 code_page_size;
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u64 cgroup;
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u32 flags;
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u32 machine_pid;
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u32 vcpu;
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u16 insn_len;
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u8 cpumode;
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u16 misc;
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u16 ins_lat;
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union {
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u16 p_stage_cyc;
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u16 retire_lat;
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};
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bool no_hw_idx; /* No hw_idx collected in branch_stack */
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char insn[MAX_INSN];
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void *raw_data;
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struct ip_callchain *callchain;
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struct branch_stack *branch_stack;
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u64 *branch_stack_cntr;
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struct regs_dump user_regs;
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struct regs_dump intr_regs;
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struct stack_dump user_stack;
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struct sample_read read;
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struct aux_sample aux_sample;
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struct simd_flags simd_flags;
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};
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/*
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* raw_data is always 4 bytes from an 8-byte boundary, so subtract 4 to get
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* 8-byte alignment.
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*/
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static inline void *perf_sample__synth_ptr(struct perf_sample *sample)
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{
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return sample->raw_data - 4;
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}
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#endif /* __PERF_SAMPLE_H */
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