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Date: Fri, 23 Oct 2020 18:10:52 +0100
From: André Przywara <andre.przywara@....com>
To: Leo Yan <leo.yan@...aro.org>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Jiri Olsa <jolsa@...hat.com>,
Namhyung Kim <namhyung@...nel.org>,
Wei Li <liwei391@...wei.com>,
James Clark <james.clark@....com>, Al Grant <Al.Grant@....com>,
Dave Martin <Dave.Martin@....com>, linux-kernel@...r.kernel.org
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 <leo.yan@...aro.org>
Compared '-' and '+' with diff -w, no changes.
Reviewed-by: Andre Przywara <andre.przywara@....com>
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);
>
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