2020-10-22 17:51:23

by Leo Yan

Subject: [PATCH v3 16/20] perf arm-spe: Add new function arm_spe_pkt_desc_op_type()

The operation type packet is complex and contains subclass; the parsing
flow causes deep indentation; for more readable, this patch introduces
a new function arm_spe_pkt_desc_op_type() which is used for operation
type parsing.

Signed-off-by: Leo Yan <[email protected]>
---
.../arm-spe-decoder/arm-spe-pkt-decoder.c | 122 ++++++++++--------
1 file changed, 66 insertions(+), 56 deletions(-)

diff --git a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
index 2cb019999016..19d05d9734ab 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
@@ -336,6 +336,70 @@ static int arm_spe_pkt_desc_event(const struct arm_spe_pkt *packet,
return buf_len - blen;
}

+static int arm_spe_pkt_desc_op_type(const struct arm_spe_pkt *packet,
+ char *buf, size_t buf_len)
+{
+ int ret, idx = packet->index;
+ unsigned long long payload = packet->payload;
+ size_t blen = buf_len;
+
+ switch (idx) {
+ case 0:
+ return arm_spe_pkt_snprintf(&buf, &blen,
+ payload & 0x1 ? "COND-SELECT" : "INSN-OTHER");
+ case 1:
+ ret = arm_spe_pkt_snprintf(&buf, &blen,
+ payload & 0x1 ? "ST" : "LD");
+ if (ret < 0)
+ return ret;
+
+ if (payload & 0x2) {
+ if (payload & 0x4) {
+ ret = arm_spe_pkt_snprintf(&buf, &blen, " AT");
+ if (ret < 0)
+ return ret;
+ }
+ if (payload & 0x8) {
+ ret = arm_spe_pkt_snprintf(&buf, &blen, " EXCL");
+ if (ret < 0)
+ return ret;
+ }
+ if (payload & 0x10) {
+ ret = arm_spe_pkt_snprintf(&buf, &blen, " AR");
+ if (ret < 0)
+ return ret;
+ }
+ } else if (payload & 0x4) {
+ ret = arm_spe_pkt_snprintf(&buf, &blen, " SIMD-FP");
+ if (ret < 0)
+ return ret;
+ }
+
+ return buf_len - blen;
+
+ case 2:
+ ret = arm_spe_pkt_snprintf(&buf, &blen, "B");
+ if (ret < 0)
+ return ret;
+
+ if (payload & 0x1) {
+ ret = arm_spe_pkt_snprintf(&buf, &blen, " COND");
+ if (ret < 0)
+ return ret;
+ }
+ if (payload & 0x2) {
+ ret = arm_spe_pkt_snprintf(&buf, &blen, " IND");
+ if (ret < 0)
+ return ret;
+ }
+
+ return buf_len - blen;
+
+ default:
+ return 0;
+ }
+}
+
static int arm_spe_pkt_desc_addr(const struct arm_spe_pkt *packet,
char *buf, size_t buf_len)
{
@@ -403,7 +467,7 @@ static int arm_spe_pkt_desc_counter(const struct arm_spe_pkt *packet,
int arm_spe_pkt_desc(const struct arm_spe_pkt *packet, char *buf,
size_t buf_len)
{
- int ret, idx = packet->index;
+ int idx = packet->index;
unsigned long long payload = packet->payload;
const char *name = arm_spe_pkt_name(packet->type);
size_t blen = buf_len;
@@ -416,61 +480,7 @@ int arm_spe_pkt_desc(const struct arm_spe_pkt *packet, char *buf,
case ARM_SPE_EVENTS:
return arm_spe_pkt_desc_event(packet, buf, buf_len);
case ARM_SPE_OP_TYPE:
- switch (idx) {
- case 0:
- return arm_spe_pkt_snprintf(&buf, &blen,
- payload & 0x1 ? "COND-SELECT" : "INSN-OTHER");
- case 1:
- ret = arm_spe_pkt_snprintf(&buf, &blen,
- payload & 0x1 ? "ST" : "LD");
- if (ret < 0)
- return ret;
-
- if (payload & 0x2) {
- if (payload & 0x4) {
- ret = arm_spe_pkt_snprintf(&buf, &blen, " AT");
- if (ret < 0)
- return ret;
- }
- if (payload & 0x8) {
- ret = arm_spe_pkt_snprintf(&buf, &blen, " EXCL");
- if (ret < 0)
- return ret;
- }
- if (payload & 0x10) {
- ret = arm_spe_pkt_snprintf(&buf, &blen, " AR");
- if (ret < 0)
- return ret;
- }
- } else if (payload & 0x4) {
- ret = arm_spe_pkt_snprintf(&buf, &blen, " SIMD-FP");
- if (ret < 0)
- return ret;
- }
-
- return buf_len - blen;
-
- case 2:
- ret = arm_spe_pkt_snprintf(&buf, &blen, "B");
- if (ret < 0)
- return ret;
-
- if (payload & 0x1) {
- ret = arm_spe_pkt_snprintf(&buf, &blen, " COND");
- if (ret < 0)
- return ret;
- }
- if (payload & 0x2) {
- ret = arm_spe_pkt_snprintf(&buf, &blen, " IND");
- if (ret < 0)
- return ret;
- }
-
- return buf_len - blen;
-
- default:
- return 0;
- }
+ return arm_spe_pkt_desc_op_type(packet, buf, buf_len);
case ARM_SPE_DATA_SOURCE:
case ARM_SPE_TIMESTAMP:
return arm_spe_pkt_snprintf(&buf, &blen, "%s %lld", name, payload);
--
2.17.1

2020-10-23 22:35:36

by Andre Przywara

Subject: Re: [PATCH v3 16/20] perf arm-spe: Add new function arm_spe_pkt_desc_op_type()

On 22/10/2020 15:58, Leo Yan wrote:

Hi,

> The operation type packet is complex and contains subclass; the parsing
> flow causes deep indentation; for more readable, this patch introduces
> a new function arm_spe_pkt_desc_op_type() which is used for operation
> type parsing.
>
> Signed-off-by: Leo Yan <[email protected]>

Compared '-' and '+' with diff -w, no changes.

Reviewed-by: Andre Przywara <[email protected]>

Thanks,
Andre

> ---
> .../arm-spe-decoder/arm-spe-pkt-decoder.c | 122 ++++++++++--------
> 1 file changed, 66 insertions(+), 56 deletions(-)
>
> diff --git a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
> index 2cb019999016..19d05d9734ab 100644
> --- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
> +++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
> @@ -336,6 +336,70 @@ static int arm_spe_pkt_desc_event(const struct arm_spe_pkt *packet,
> return buf_len - blen;
> }
>
> +static int arm_spe_pkt_desc_op_type(const struct arm_spe_pkt *packet,
> + char *buf, size_t buf_len)
> +{
> + int ret, idx = packet->index;
> + unsigned long long payload = packet->payload;
> + size_t blen = buf_len;
> +
> + switch (idx) {
> + case 0:
> + return arm_spe_pkt_snprintf(&buf, &blen,
> + payload & 0x1 ? "COND-SELECT" : "INSN-OTHER");
> + case 1:
> + ret = arm_spe_pkt_snprintf(&buf, &blen,
> + payload & 0x1 ? "ST" : "LD");
> + if (ret < 0)
> + return ret;
> +
> + if (payload & 0x2) {
> + if (payload & 0x4) {
> + ret = arm_spe_pkt_snprintf(&buf, &blen, " AT");
> + if (ret < 0)
> + return ret;
> + }
> + if (payload & 0x8) {
> + ret = arm_spe_pkt_snprintf(&buf, &blen, " EXCL");
> + if (ret < 0)
> + return ret;
> + }
> + if (payload & 0x10) {
> + ret = arm_spe_pkt_snprintf(&buf, &blen, " AR");
> + if (ret < 0)
> + return ret;
> + }
> + } else if (payload & 0x4) {
> + ret = arm_spe_pkt_snprintf(&buf, &blen, " SIMD-FP");
> + if (ret < 0)
> + return ret;
> + }
> +
> + return buf_len - blen;
> +
> + case 2:
> + ret = arm_spe_pkt_snprintf(&buf, &blen, "B");
> + if (ret < 0)
> + return ret;
> +
> + if (payload & 0x1) {
> + ret = arm_spe_pkt_snprintf(&buf, &blen, " COND");
> + if (ret < 0)
> + return ret;
> + }
> + if (payload & 0x2) {
> + ret = arm_spe_pkt_snprintf(&buf, &blen, " IND");
> + if (ret < 0)
> + return ret;
> + }
> +
> + return buf_len - blen;
> +
> + default:
> + return 0;
> + }
> +}
> +
> static int arm_spe_pkt_desc_addr(const struct arm_spe_pkt *packet,
> char *buf, size_t buf_len)
> {
> @@ -403,7 +467,7 @@ static int arm_spe_pkt_desc_counter(const struct arm_spe_pkt *packet,
> int arm_spe_pkt_desc(const struct arm_spe_pkt *packet, char *buf,
> size_t buf_len)
> {
> - int ret, idx = packet->index;
> + int idx = packet->index;
> unsigned long long payload = packet->payload;
> const char *name = arm_spe_pkt_name(packet->type);
> size_t blen = buf_len;
> @@ -416,61 +480,7 @@ int arm_spe_pkt_desc(const struct arm_spe_pkt *packet, char *buf,
> case ARM_SPE_EVENTS:
> return arm_spe_pkt_desc_event(packet, buf, buf_len);
> case ARM_SPE_OP_TYPE:
> - switch (idx) {
> - case 0:
> - return arm_spe_pkt_snprintf(&buf, &blen,
> - payload & 0x1 ? "COND-SELECT" : "INSN-OTHER");
> - case 1:
> - ret = arm_spe_pkt_snprintf(&buf, &blen,
> - payload & 0x1 ? "ST" : "LD");
> - if (ret < 0)
> - return ret;
> -
> - if (payload & 0x2) {
> - if (payload & 0x4) {
> - ret = arm_spe_pkt_snprintf(&buf, &blen, " AT");
> - if (ret < 0)
> - return ret;
> - }
> - if (payload & 0x8) {
> - ret = arm_spe_pkt_snprintf(&buf, &blen, " EXCL");
> - if (ret < 0)
> - return ret;
> - }
> - if (payload & 0x10) {
> - ret = arm_spe_pkt_snprintf(&buf, &blen, " AR");
> - if (ret < 0)
> - return ret;
> - }
> - } else if (payload & 0x4) {
> - ret = arm_spe_pkt_snprintf(&buf, &blen, " SIMD-FP");
> - if (ret < 0)
> - return ret;
> - }
> -
> - return buf_len - blen;
> -
> - case 2:
> - ret = arm_spe_pkt_snprintf(&buf, &blen, "B");
> - if (ret < 0)
> - return ret;
> -
> - if (payload & 0x1) {
> - ret = arm_spe_pkt_snprintf(&buf, &blen, " COND");
> - if (ret < 0)
> - return ret;
> - }
> - if (payload & 0x2) {
> - ret = arm_spe_pkt_snprintf(&buf, &blen, " IND");
> - if (ret < 0)
> - return ret;
> - }
> -
> - return buf_len - blen;
> -
> - default:
> - return 0;
> - }
> + return arm_spe_pkt_desc_op_type(packet, buf, buf_len);
> case ARM_SPE_DATA_SOURCE:
> case ARM_SPE_TIMESTAMP:
> return arm_spe_pkt_snprintf(&buf, &blen, "%s %lld", name, payload);
>