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263925bf84
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 <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: linux-toolchains@vger.kernel.org
Cc: linux-trace-devel@vger.kernel.org
Link: https://lore.kernel.org/r/20231213001323.718046-15-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
88 lines
1.7 KiB
C
88 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __PERF_SYMBOL_CONF
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#define __PERF_SYMBOL_CONF 1
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#include <stdbool.h>
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struct strlist;
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struct intlist;
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struct symbol_conf {
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bool nanosecs;
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unsigned short priv_size;
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bool try_vmlinux_path,
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init_annotation,
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force,
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ignore_vmlinux,
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ignore_vmlinux_buildid,
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show_kernel_path,
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use_modules,
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allow_aliases,
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show_nr_samples,
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show_total_period,
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use_callchain,
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cumulate_callchain,
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show_branchflag_count,
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exclude_other,
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show_cpu_utilization,
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initialized,
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kptr_restrict,
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event_group,
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demangle,
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demangle_kernel,
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filter_relative,
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show_hist_headers,
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has_filter,
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show_ref_callgraph,
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hide_unresolved,
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raw_trace,
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report_hierarchy,
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report_block,
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report_individual_block,
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inline_name,
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disable_add2line_warn,
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buildid_mmap2,
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guest_code,
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lazy_load_kernel_maps,
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keep_exited_threads,
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annotate_data_member,
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annotate_data_sample;
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const char *vmlinux_name,
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*kallsyms_name,
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*source_prefix,
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*field_sep,
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*graph_function;
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const char *default_guest_vmlinux_name,
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*default_guest_kallsyms,
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*default_guest_modules;
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const char *guestmount;
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const char *dso_list_str,
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*comm_list_str,
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*pid_list_str,
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*tid_list_str,
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*sym_list_str,
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*col_width_list_str,
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*bt_stop_list_str;
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char *addr2line_path;
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unsigned long time_quantum;
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struct strlist *dso_list,
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*comm_list,
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*sym_list,
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*dso_from_list,
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*dso_to_list,
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*sym_from_list,
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*sym_to_list,
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*bt_stop_list;
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struct intlist *pid_list,
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*tid_list,
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*addr_list;
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const char *symfs;
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int res_sample;
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int pad_output_len_dso;
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int group_sort_idx;
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int addr_range;
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};
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extern struct symbol_conf symbol_conf;
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#endif // __PERF_SYMBOL_CONF
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