[PATCH V3 14/14] tools/perf: Set instruction name to be used with insn-stat when using raw instruction

Athira Rajeev
2024-06-01T06:15:57Z

Since the "ins.name" is not set while using raw instruction,
perf annotate with insn-stat gives wrong data:

Result from "./perf annotate --data-type --insn-stat":

Annotate Instruction stats
total 615, ok 419 (68.1%), bad 196 (31.9%)

Name : Good Bad
-----------------------------------------------------------
: 419 196

Patch sets "dl->ins.name" in arch specific function "check_ppc_insn"
while initialising "struct disasm_line". Also update "ins_find" function
to pass "struct disasm_line" as a parameter so as to set its name field
in arch specific call.

With the patch changes:

Annotate Instruction stats
total 609, ok 446 (73.2%), bad 163 (26.8%)

Name/opcode: Good Bad
-----------------------------------------------------------
58 : 323 80
32 : 49 43
34 : 33 11
OP_31_XOP_LDX : 8 20
40 : 23 0
OP_31_XOP_LWARX : 5 1
OP_31_XOP_LWZX : 2 3
OP_31_XOP_LDARX : 3 0
33 : 0 2
OP_31_XOP_LBZX : 0 1
OP_31_XOP_LWAX : 0 1
OP_31_XOP_LHZX : 0 1

Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
---
.../perf/arch/powerpc/annotate/instructions.c | 18 +++++++++++++++---
tools/perf/builtin-annotate.c | 4 ++--
tools/perf/util/annotate.c | 2 +-
tools/perf/util/disasm.c | 10 +++++-----
tools/perf/util/disasm.h | 2 +-
5 files changed, 24 insertions(+), 12 deletions(-)

diff --git a/tools/perf/arch/powerpc/annotate/instructions.c b/tools/perf/arch/powerpc/annotate/instructions.c
index 3ecf5a986037..c4113b3ee71a 100644
--- a/tools/perf/arch/powerpc/annotate/instructions.c
+++ b/tools/perf/arch/powerpc/annotate/instructions.c
@@ -189,8 +189,9 @@ static int cmp_offset(const void *a, const void *b)
return (val1->value - val2->value);
}

-static struct ins_ops *check_ppc_insn(int raw_insn)
+static struct ins_ops *check_ppc_insn(struct disasm_line *dl)
{
+ int raw_insn = dl->ops.raw_insn;
int opcode = PPC_OP(raw_insn);
int mem_insn_31 = PPC_21_30(raw_insn);
struct insn_offset *ret;
@@ -198,19 +199,30 @@ static struct ins_ops *check_ppc_insn(int raw_insn)
"OP_31_INSN",
mem_insn_31
};
+ char name_insn[32];

/*
* Instructions with opcode 32 to 63 are memory
* instructions in powerpc
*/
if ((opcode & 0x20)) {
+ /*
+ * Set name in case of raw instruction to
+ * opcode to be used in insn-stat
+ */
+ if (!strlen(dl->ins.name)) {
+ sprintf(name_insn, "%d", opcode);
+ dl->ins.name = strdup(name_insn);
+ }
return &load_store_ops;
} else if (opcode == 31) {
/* Check for memory instructions with opcode 31 */
ret = bsearch(&mem_insns_31_opcode, ins_array, ARRAY_SIZE(ins_array), sizeof(ins_array[0]), cmp_offset);
- if (ret != NULL)
+ if (ret) {
+ if (!strlen(dl->ins.name))
+ dl->ins.name = strdup(ret->name);
return &load_store_ops;
- else {
+ } else {
mem_insns_31_opcode.value = PPC_22_30(raw_insn);
ret = bsearch(&mem_insns_31_opcode, arithmetic_ins_op_31, ARRAY_SIZE(arithmetic_ins_op_31),
sizeof(arithmetic_ins_op_31[0]), cmp_offset);
diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index 50d2fb222d48..926467b9a023 100644
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -396,10 +396,10 @@ static void print_annotate_item_stat(struct list_head *head, const char *title)
printf("total %d, ok %d (%.1f%%), bad %d (%.1f%%)\n\n", total,
total_good, 100.0 * total_good / (total ?: 1),
total_bad, 100.0 * total_bad / (total ?: 1));
- printf(" %-10s: %5s %5s\n", "Name", "Good", "Bad");
+ printf(" %-10s: %5s %5s\n", "Name/opcode", "Good", "Bad");
printf("-----------------------------------------------------------\n");
list_for_each_entry(istat, head, list)
- printf(" %-10s: %5d %5d\n", istat->name, istat->good, istat->bad);
+ printf(" %-20s: %5d %5d\n", istat->name, istat->good, istat->bad);
printf("\n");
}

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index ddb36dddb8cc..b8fc663dad4c 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -2235,7 +2235,7 @@ static struct annotated_item_stat *annotate_data_stat(struct list_head *head,
return NULL;

istat->name = strdup(name);
- if (istat->name == NULL) {
+ if ((istat->name == NULL) || (!strlen(istat->name))) {
free(istat);
return NULL;
}
diff --git a/tools/perf/util/disasm.c b/tools/perf/util/disasm.c
index 915508d2e197..94ca0b8759fe 100644
--- a/tools/perf/util/disasm.c
+++ b/tools/perf/util/disasm.c
@@ -868,7 +868,7 @@ static void ins__sort(struct arch *arch)
qsort(arch->instructions, nmemb, sizeof(struct ins), ins__cmp);
}

-static struct ins_ops *__ins__find(struct arch *arch, const char *name, int raw_insn)
+static struct ins_ops *__ins__find(struct arch *arch, const char *name, struct disasm_line *dl)
{
struct ins *ins;
const int nmemb = arch->nr_instructions;
@@ -880,7 +880,7 @@ static struct ins_ops *__ins__find(struct arch *arch, const char *name, int raw_
*/
struct ins_ops *ops;

- ops = check_ppc_insn(raw_insn);
+ ops = check_ppc_insn(dl);
if (ops)
return ops;
}
@@ -914,9 +914,9 @@ static struct ins_ops *__ins__find(struct arch *arch, const char *name, int raw_
return ins ? ins->ops : NULL;
}

-struct ins_ops *ins__find(struct arch *arch, const char *name, int raw_insn)
+struct ins_ops *ins__find(struct arch *arch, const char *name, struct disasm_line *dl)
{
- struct ins_ops *ops = __ins__find(arch, name, raw_insn);
+ struct ins_ops *ops = __ins__find(arch, name, dl);

if (!ops && arch->associate_instruction_ops)
ops = arch->associate_instruction_ops(arch, name);
@@ -926,7 +926,7 @@ struct ins_ops *ins__find(struct arch *arch, const char *name, int raw_insn)

static void disasm_line__init_ins(struct disasm_line *dl, struct arch *arch, struct map_symbol *ms)
{
- dl->ins.ops = ins__find(arch, dl->ins.name, dl->ops.raw_insn);
+ dl->ins.ops = ins__find(arch, dl->ins.name, dl);

if (!dl->ins.ops)
return;
diff --git a/tools/perf/util/disasm.h b/tools/perf/util/disasm.h
index 831ebcc329cd..2788c3fe2157 100644
--- a/tools/perf/util/disasm.h
+++ b/tools/perf/util/disasm.h
@@ -106,7 +106,7 @@ struct annotate_args {
struct arch *arch__find(const char *name);
bool arch__is(struct arch *arch, const char *name);

-struct ins_ops *ins__find(struct arch *arch, const char *name, int raw_insn);
+struct ins_ops *ins__find(struct arch *arch, const char *name, struct disasm_line *dl);
int ins__scnprintf(struct ins *ins, char *bf, size_t size,
struct ins_operands *ops, int max_ins_name);

--
2.43.0