diff options
author | Stephane Eranian | 2022-02-08 13:16:37 -0800 |
---|---|---|
committer | Arnaldo Carvalho de Melo | 2022-02-16 11:21:22 -0300 |
commit | 052747700e914896e8c78ff019411487dc7c12a0 (patch) | |
tree | 08b65a5fafe68aee1a7bb82ce413cfd3ffc3a284 /tools | |
parent | b47f18d85c795d8deac8210f50032030b1254882 (diff) |
perf report: Add "addr_from" and "addr_to" sort dimensions
With the existing symbol_from/symbol_to, branches captured in the same
function would be collapsed into a single function if the latencies
associated with the each branch (cycles) were all the same. That is the
case on Intel Broadwell, for instance. Since Intel Skylake, the latency
is captured by hardware and therefore is used to disambiguate branches.
Add addr_from/addr_to sort dimensions to sort branches based on their
addresses and not the function there are in. The output is still the
function name but the offset within the function is provided to uniquely
identify each branch. These new sort dimensions also help with annotate
because they create different entries in the histogram which, in turn,
generates proper branch annotations.
Here is an example using AMD's branch sampling:
$ perf record -a -b -c 1000037 -e cpu/branch-brs/ test_prg
$ perf report
Samples: 6M of event 'cpu/branch-brs/', Event count (approx.): 6901276
Overhead Command Source Shared Object Source Symbol Target Symbol Basic Block Cycle
99.65% test_prg test_prg [.] test_thread [.] test_thread -
0.02% test_prg [kernel.vmlinux] [k] asm_sysvec_apic_timer_interrupt [k] error_entry -
$ perf report -F overhead,comm,dso,addr_from,addr_to
Samples: 6M of event 'cpu/branch-brs/', Event count (approx.): 6901276
Overhead Command Shared Object Source Address Target Address
4.22% test_prg test_prg [.] test_thread+0x3c [.] test_thread+0x4
4.13% test_prg test_prg [.] test_thread+0x4 [.] test_thread+0x3a
4.09% test_prg test_prg [.] test_thread+0x3a [.] test_thread+0x6
4.08% test_prg test_prg [.] test_thread+0x2 [.] test_thread+0x3c
4.06% test_prg test_prg [.] test_thread+0x3e [.] test_thread+0x2
3.87% test_prg test_prg [.] test_thread+0x6 [.] test_thread+0x38
3.84% test_prg test_prg [.] test_thread [.] test_thread+0x3e
3.76% test_prg test_prg [.] test_thread+0x1e [.] test_thread
3.76% test_prg test_prg [.] test_thread+0x38 [.] test_thread+0x8
3.56% test_prg test_prg [.] test_thread+0x22 [.] test_thread+0x1e
3.54% test_prg test_prg [.] test_thread+0x8 [.] test_thread+0x36
3.47% test_prg test_prg [.] test_thread+0x1c [.] test_thread+0x22
3.45% test_prg test_prg [.] test_thread+0x36 [.] test_thread+0xa
3.28% test_prg test_prg [.] test_thread+0x24 [.] test_thread+0x1c
3.25% test_prg test_prg [.] test_thread+0xa [.] test_thread+0x34
3.24% test_prg test_prg [.] test_thread+0x1a [.] test_thread+0x24
3.20% test_prg test_prg [.] test_thread+0x34 [.] test_thread+0xc
3.04% test_prg test_prg [.] test_thread+0x26 [.] test_thread+0x1a
3.01% test_prg test_prg [.] test_thread+0xc [.] test_thread+0x32
2.98% test_prg test_prg [.] test_thread+0x18 [.] test_thread+0x26
2.94% test_prg test_prg [.] test_thread+0x32 [.] test_thread+0xe
2.76% test_prg test_prg [.] test_thread+0x28 [.] test_thread+0x18
2.73% test_prg test_prg [.] test_thread+0xe [.] test_thread+0x30
2.67% test_prg test_prg [.] test_thread+0x30 [.] test_thread+0x10
2.67% test_prg test_prg [.] test_thread+0x16 [.] test_thread+0x28
2.46% test_prg test_prg [.] test_thread+0x10 [.] test_thread+0x2e
2.44% test_prg test_prg [.] test_thread+0x2a [.] test_thread+0x16
2.38% test_prg test_prg [.] test_thread+0x14 [.] test_thread+0x2a
2.32% test_prg test_prg [.] test_thread+0x2e [.] test_thread+0x12
2.28% test_prg test_prg [.] test_thread+0x12 [.] test_thread+0x2c
2.16% test_prg test_prg [.] test_thread+0x2c [.] test_thread+0x14
0.02% test_prg [kernel.vmlinux] [k] asm_sysvec_apic_ti+0x5 [k] error_entry
Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kim Phillips <kim.phillips@amd.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <songliubraving@fb.com>
Link: http://lore.kernel.org/lkml/20220208211637.2221872-13-eranian@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r-- | tools/perf/util/hist.c | 2 | ||||
-rw-r--r-- | tools/perf/util/hist.h | 2 | ||||
-rw-r--r-- | tools/perf/util/sort.c | 128 | ||||
-rw-r--r-- | tools/perf/util/sort.h | 2 |
4 files changed, 134 insertions, 0 deletions
diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c index 0a8033b09e28..1c085ab56534 100644 --- a/tools/perf/util/hist.c +++ b/tools/perf/util/hist.c @@ -124,6 +124,7 @@ void hists__calc_col_len(struct hists *hists, struct hist_entry *h) } else { symlen = unresolved_col_width + 4 + 2; hists__new_col_len(hists, HISTC_SYMBOL_FROM, symlen); + hists__new_col_len(hists, HISTC_ADDR_FROM, symlen); hists__set_unres_dso_col_len(hists, HISTC_DSO_FROM); } @@ -138,6 +139,7 @@ void hists__calc_col_len(struct hists *hists, struct hist_entry *h) } else { symlen = unresolved_col_width + 4 + 2; hists__new_col_len(hists, HISTC_SYMBOL_TO, symlen); + hists__new_col_len(hists, HISTC_ADDR_TO, symlen); hists__set_unres_dso_col_len(hists, HISTC_DSO_TO); } diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h index 2a15e22fb89c..7ed4648d2fc2 100644 --- a/tools/perf/util/hist.h +++ b/tools/perf/util/hist.h @@ -77,6 +77,8 @@ enum hist_column { HISTC_GLOBAL_INS_LAT, HISTC_LOCAL_P_STAGE_CYC, HISTC_GLOBAL_P_STAGE_CYC, + HISTC_ADDR_FROM, + HISTC_ADDR_TO, HISTC_NR_COLS, /* Last entry */ }; diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c index 2da081ef532b..6d5588e80935 100644 --- a/tools/perf/util/sort.c +++ b/tools/perf/util/sort.c @@ -990,6 +990,128 @@ struct sort_entry sort_sym_to = { .se_width_idx = HISTC_SYMBOL_TO, }; +static int _hist_entry__addr_snprintf(struct map_symbol *ms, + u64 ip, char level, char *bf, size_t size, + unsigned int width) +{ + struct symbol *sym = ms->sym; + struct map *map = ms->map; + size_t ret = 0, offs; + + ret += repsep_snprintf(bf + ret, size - ret, "[%c] ", level); + if (sym && map) { + if (sym->type == STT_OBJECT) { + ret += repsep_snprintf(bf + ret, size - ret, "%s", sym->name); + ret += repsep_snprintf(bf + ret, size - ret, "+0x%llx", + ip - map->unmap_ip(map, sym->start)); + } else { + ret += repsep_snprintf(bf + ret, size - ret, "%.*s", + width - ret, + sym->name); + offs = ip - sym->start; + if (offs) + ret += repsep_snprintf(bf + ret, size - ret, "+0x%llx", offs); + } + } else { + size_t len = BITS_PER_LONG / 4; + ret += repsep_snprintf(bf + ret, size - ret, "%-#.*llx", + len, ip); + } + + return ret; +} + +static int hist_entry__addr_from_snprintf(struct hist_entry *he, char *bf, + size_t size, unsigned int width) +{ + if (he->branch_info) { + struct addr_map_symbol *from = &he->branch_info->from; + + return _hist_entry__addr_snprintf(&from->ms, from->al_addr, + he->level, bf, size, width); + } + + return repsep_snprintf(bf, size, "%-*.*s", width, width, "N/A"); +} + +static int hist_entry__addr_to_snprintf(struct hist_entry *he, char *bf, + size_t size, unsigned int width) +{ + if (he->branch_info) { + struct addr_map_symbol *to = &he->branch_info->to; + + return _hist_entry__addr_snprintf(&to->ms, to->al_addr, + he->level, bf, size, width); + } + + return repsep_snprintf(bf, size, "%-*.*s", width, width, "N/A"); +} + +static int64_t +sort__addr_from_cmp(struct hist_entry *left, struct hist_entry *right) +{ + struct addr_map_symbol *from_l; + struct addr_map_symbol *from_r; + int64_t ret; + + if (!left->branch_info || !right->branch_info) + return cmp_null(left->branch_info, right->branch_info); + + from_l = &left->branch_info->from; + from_r = &right->branch_info->from; + + /* + * comparing symbol address alone is not enough since it's a + * relative address within a dso. + */ + ret = _sort__dso_cmp(from_l->ms.map, from_r->ms.map); + if (ret != 0) + return ret; + + return _sort__addr_cmp(from_l->addr, from_r->addr); +} + +static int64_t +sort__addr_to_cmp(struct hist_entry *left, struct hist_entry *right) +{ + struct addr_map_symbol *to_l; + struct addr_map_symbol *to_r; + int64_t ret; + + if (!left->branch_info || !right->branch_info) + return cmp_null(left->branch_info, right->branch_info); + + to_l = &left->branch_info->to; + to_r = &right->branch_info->to; + + /* + * comparing symbol address alone is not enough since it's a + * relative address within a dso. + */ + ret = _sort__dso_cmp(to_l->ms.map, to_r->ms.map); + if (ret != 0) + return ret; + + return _sort__addr_cmp(to_l->addr, to_r->addr); +} + +struct sort_entry sort_addr_from = { + .se_header = "Source Address", + .se_cmp = sort__addr_from_cmp, + .se_snprintf = hist_entry__addr_from_snprintf, + .se_filter = hist_entry__sym_from_filter, /* shared with sym_from */ + .se_width_idx = HISTC_ADDR_FROM, +}; + +struct sort_entry sort_addr_to = { + .se_header = "Target Address", + .se_cmp = sort__addr_to_cmp, + .se_snprintf = hist_entry__addr_to_snprintf, + .se_filter = hist_entry__sym_to_filter, /* shared with sym_to */ + .se_width_idx = HISTC_ADDR_TO, +}; + + static int64_t sort__mispredict_cmp(struct hist_entry *left, struct hist_entry *right) { @@ -1893,6 +2015,8 @@ static struct sort_dimension bstack_sort_dimensions[] = { DIM(SORT_SRCLINE_FROM, "srcline_from", sort_srcline_from), DIM(SORT_SRCLINE_TO, "srcline_to", sort_srcline_to), DIM(SORT_SYM_IPC, "ipc_lbr", sort_sym_ipc), + DIM(SORT_ADDR_FROM, "addr_from", sort_addr_from), + DIM(SORT_ADDR_TO, "addr_to", sort_addr_to), }; #undef DIM @@ -3126,6 +3250,10 @@ static bool get_elide(int idx, FILE *output) return __get_elide(symbol_conf.dso_from_list, "dso_from", output); case HISTC_DSO_TO: return __get_elide(symbol_conf.dso_to_list, "dso_to", output); + case HISTC_ADDR_FROM: + return __get_elide(symbol_conf.sym_from_list, "addr_from", output); + case HISTC_ADDR_TO: + return __get_elide(symbol_conf.sym_to_list, "addr_to", output); default: break; } diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h index f994261888e1..2ddc00d1c464 100644 --- a/tools/perf/util/sort.h +++ b/tools/perf/util/sort.h @@ -251,6 +251,8 @@ enum sort_type { SORT_SRCLINE_FROM, SORT_SRCLINE_TO, SORT_SYM_IPC, + SORT_ADDR_FROM, + SORT_ADDR_TO, /* memory mode specific sort keys */ __SORT_MEMORY_MODE, |