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
...
Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
---
tools/perf/Documentation/perf-report.txt | 1 +
tools/perf/util/hist.h | 1 +
tools/perf/util/sort.c | 47 ++++++++++++++++++++++++
tools/perf/util/sort.h | 1 +
4 files changed, 50 insertions(+)
diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt
index b57eb51b47aa..38f59ac064f7 100644
--- a/tools/perf/Documentation/perf-report.txt
+++ b/tools/perf/Documentation/perf-report.txt
@@ -120,6 +120,7 @@ OPTIONS
- simd: Flags describing a SIMD operation. "e" for empty Arm SVE predicate. "p" for partial Arm SVE predicate
- type: Data type of sample memory access.
- typeoff: Offset in the data type of sample memory access.
+ - symoff: Offset in the symbol.
By default, comm, dso and symbol keys are used.
(i.e. --sort comm,dso,symbol)
diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
index 941176afcebc..1ce0ee262abe 100644
--- a/tools/perf/util/hist.h
+++ b/tools/perf/util/hist.h
@@ -84,6 +84,7 @@ enum hist_column {
HISTC_SIMD,
HISTC_TYPE,
HISTC_TYPE_OFFSET,
+ HISTC_SYMBOL_OFFSET,
HISTC_NR_COLS, /* Last entry */
};
diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
index d78e680d3988..0cbbd5ba8175 100644
--- a/tools/perf/util/sort.c
+++ b/tools/perf/util/sort.c
@@ -419,6 +419,52 @@ struct sort_entry sort_sym = {
.se_width_idx = HISTC_SYMBOL,
};
+/* --sort symoff */
+
+static int64_t
+sort__symoff_cmp(struct hist_entry *left, struct hist_entry *right)
+{
+ int64_t ret;
+
+ ret = sort__sym_cmp(left, right);
+ if (ret)
+ return ret;
+
+ return left->ip - right->ip;
+}
+
+static int64_t
+sort__symoff_sort(struct hist_entry *left, struct hist_entry *right)
+{
+ int64_t ret;
+
+ ret = sort__sym_sort(left, right);
+ if (ret)
+ return ret;
+
+ return left->ip - right->ip;
+}
+
+static int
+hist_entry__symoff_snprintf(struct hist_entry *he, char *bf, size_t size, unsigned int width)
+{
+ struct symbol *sym = he->ms.sym;
+
+ if (sym == NULL)
+ return repsep_snprintf(bf, size, "[%c] %-#.*llx", he->level, width - 4, he->ip);
+
+ return repsep_snprintf(bf, size, "[%c] %s+0x%llx", he->level, sym->name, he->ip - sym->start);
+}
+
+struct sort_entry sort_sym_offset = {
+ .se_header = "Symbol Offset",
+ .se_cmp = sort__symoff_cmp,
+ .se_sort = sort__symoff_sort,
+ .se_snprintf = hist_entry__symoff_snprintf,
+ .se_filter = hist_entry__sym_filter,
+ .se_width_idx = HISTC_SYMBOL_OFFSET,
+};
+
/* --sort srcline */
char *hist_entry__srcline(struct hist_entry *he)
@@ -2335,6 +2381,7 @@ static struct sort_dimension common_sort_dimensions[] = {
DIM(SORT_SIMD, "simd", sort_simd),
DIM(SORT_ANNOTATE_DATA_TYPE, "type", sort_type),
DIM(SORT_ANNOTATE_DATA_TYPE_OFFSET, "typeoff", sort_type_offset),
+ DIM(SORT_SYM_OFFSET, "symoff", sort_sym_offset),
};
#undef DIM
diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
index d806adcc1e1e..6f6b4189a389 100644
--- a/tools/perf/util/sort.h
+++ b/tools/perf/util/sort.h
@@ -249,6 +249,7 @@ enum sort_type {
SORT_SIMD,
SORT_ANNOTATE_DATA_TYPE,
SORT_ANNOTATE_DATA_TYPE_OFFSET,
+ SORT_SYM_OFFSET,
/* branch stack specific sort keys */
__SORT_BRANCH_STACK,
--
2.42.0.869.gea05f2083d-goog
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