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Date: Wed, 25 Oct 2023 10:00:38 -0700
From: Namhyung Kim <namhyung@...il.com>
To: Thomas Richter <tmricht@...ux.ibm.com>
Cc: linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
acme@...nel.org, svens@...ux.ibm.com, gor@...ux.ibm.com,
sumanthk@...ux.ibm.com, hca@...ux.ibm.com
Subject: Re: [PATCH] perf report: Add s390 raw data interpretation for PAI counters
Hello,
On Tue, Oct 24, 2023 at 2:17 AM Thomas Richter <tmricht@...ux.ibm.com> wrote:
>
> commit 1bf54f32f525 ("s390/pai: Add support for cryptography counters")
> added support for Processor Activity Instrumentation Facility (PAI)
> counters. These counters values are added as raw data with the perf
> sample during perf record.
> Now add support to display these counters in perf report command.
> The counter number, its assigned name and value is now printed in
> addition to the hexadecimal output.
>
> Output before:
> # perf report -D
>
> 6 514766399626050 0x7b058 [0x48]: PERF_RECORD_SAMPLE(IP, 0x1):
> 303977/303977: 0 period: 1 addr: 0
> ... thread: paitest:303977
> ...... dso: <not found>
>
> 0x7b0a0@...ot/perf.data.paicrypto [0x48]: event: 9
> .
> . ... raw event: size 72 bytes
> . 0000: 00 00 00 09 00 01 00 48 00 00 00 00 00 00 00 00 .......H........
> . 0010: 00 04 a3 69 00 04 a3 69 00 01 d4 2d 76 de a0 bb ...i...i...-v...
> . 0020: 00 00 00 00 00 01 5c 53 00 00 00 06 00 00 00 00 ......\S........
> . 0030: 00 00 00 00 00 00 00 01 00 00 00 0c 00 07 00 00 ................
> . 0040: 00 00 00 53 96 af 00 00 ...S....
>
> Output after:
> # perf report -D
>
> 6 514766399626050 0x7b058 [0x48]: PERF_RECORD_SAMPLE(IP, 0x1):
> 303977/303977: 0 period: 1 addr: 0
> ... thread: paitest:303977
> ...... dso: <not found>
>
> 0x7b0a0@...ot/perf.data.paicrypto [0x48]: event: 9
> .
> . ... raw event: size 72 bytes
> . 0000: 00 00 00 09 00 01 00 48 00 00 00 00 00 00 00 00 .......H........
> . 0010: 00 04 a3 69 00 04 a3 69 00 01 d4 2d 76 de a0 bb ...i...i...-v...
> . 0020: 00 00 00 00 00 01 5c 53 00 00 00 06 00 00 00 00 ......\S........
> . 0030: 00 00 00 00 00 00 00 01 00 00 00 0c 00 07 00 00 ................
> . 0040: 00 00 00 53 96 af 00 00 ...S....
>
> Counter:007 km_aes_128 Value:0x00000000005396af <--- new
>
> Signed-off-by: Thomas Richter <tmricht@...ux.ibm.com>
> ---
> tools/perf/util/s390-cpumcf-kernel.h | 2 +
> tools/perf/util/s390-sample-raw.c | 89 ++++++++++++++++++++++++++--
> 2 files changed, 85 insertions(+), 6 deletions(-)
>
> diff --git a/tools/perf/util/s390-cpumcf-kernel.h b/tools/perf/util/s390-cpumcf-kernel.h
> index f55ca07f3ca1..74b36644e384 100644
> --- a/tools/perf/util/s390-cpumcf-kernel.h
> +++ b/tools/perf/util/s390-cpumcf-kernel.h
> @@ -12,6 +12,8 @@
> #define S390_CPUMCF_DIAG_DEF 0xfeef /* Counter diagnostic entry ID */
> #define PERF_EVENT_CPUM_CF_DIAG 0xBC000 /* Event: Counter sets */
> #define PERF_EVENT_CPUM_SF_DIAG 0xBD000 /* Event: Combined-sampling */
> +#define PERF_EVENT_PAI_CRYPTO_ALL 0x1000 /* Event: CRYPTO_ALL */
> +#define PERF_EVENT_PAI_NNPA_ALL 0x1800 /* Event: NNPA_ALL */
>
> struct cf_ctrset_entry { /* CPU-M CF counter set entry (8 byte) */
> unsigned int def:16; /* 0-15 Data Entry Format */
> diff --git a/tools/perf/util/s390-sample-raw.c b/tools/perf/util/s390-sample-raw.c
> index 115b16edb451..f360aed3bf0a 100644
> --- a/tools/perf/util/s390-sample-raw.c
> +++ b/tools/perf/util/s390-sample-raw.c
> @@ -125,6 +125,9 @@ static int get_counterset_start(int setnr)
> return 128;
> case CPUMF_CTR_SET_MT_DIAG: /* Diagnostic counter set */
> return 448;
> + case PERF_EVENT_PAI_NNPA_ALL: /* PAI NNPA counter set */
> + case PERF_EVENT_PAI_CRYPTO_ALL: /* PAI CRYPTO counter set */
> + return setnr;
> default:
> return -1;
> }
> @@ -212,27 +215,101 @@ static void s390_cpumcfdg_dump(struct perf_pmu *pmu, struct perf_sample *sample)
> }
> }
>
> +/*
> + * Check for consistency of PAI_CRYPTO/PAI_NNPA raw data.
> + */
> +struct pai_data { /* Event number and value */
> + u16 event_nr;
> + u64 event_val;
> +} __packed;
> +
> +/*
> + * Test for valid raw data. At least one PAI event should be in the raw
> + * data section.
> + */
> +static bool s390_pai_all_test(struct perf_sample *sample)
> +{
> + unsigned char *buf = sample->raw_data;
> + size_t len = sample->raw_size;
> +
> + if (len < 0xa || !buf)
> + return false;
> + return true;
> +}
> +
> +static void s390_pai_all_dump(struct evsel *evsel, struct perf_sample *sample)
> +{
> + size_t len = sample->raw_size, offset = 0;
> + unsigned char *p = sample->raw_data;
> + const char *color = PERF_COLOR_BLUE;
> + struct pai_data pai_data;
> + char *ev_name;
> +
> + evsel->pmu = perf_pmus__find_by_type(evsel->core.attr.type);
Does it need to find evsel->pmu everytime?
Thanks,
Namhyung
> + while (offset < len) {
> + memcpy(&pai_data.event_nr, p, sizeof(pai_data.event_nr));
> + pai_data.event_nr = be16_to_cpu(pai_data.event_nr);
> + p += sizeof(pai_data.event_nr);
> + offset += sizeof(pai_data.event_nr);
> +
> + memcpy(&pai_data.event_val, p, sizeof(pai_data.event_val));
> + pai_data.event_val = be64_to_cpu(pai_data.event_val);
> + p += sizeof(pai_data.event_val);
> + offset += sizeof(pai_data.event_val);
> +
> + ev_name = get_counter_name(evsel->core.attr.config,
> + pai_data.event_nr, evsel->pmu);
> + color_fprintf(stdout, color, "\tCounter:%03d %s Value:%#018lx\n",
> + pai_data.event_nr, ev_name ?: "<unknown>",
> + pai_data.event_val);
> +
> + if (offset + 0xa > len)
> + break;
> + }
> + color_fprintf(stdout, color, "\n");
> +}
> +
> /* S390 specific trace event function. Check for PERF_RECORD_SAMPLE events
> * and if the event was triggered by a counter set diagnostic event display
> * its raw data.
> * The function is only invoked when the dump flag -D is set.
> */
> -void evlist__s390_sample_raw(struct evlist *evlist, union perf_event *event, struct perf_sample *sample)
> +void evlist__s390_sample_raw(struct evlist *evlist, union perf_event *event,
> + struct perf_sample *sample)
> {
> + const char *pai_name;
> struct evsel *evsel;
>
> if (event->header.type != PERF_RECORD_SAMPLE)
> return;
>
> evsel = evlist__event2evsel(evlist, event);
> - if (evsel == NULL ||
> - evsel->core.attr.config != PERF_EVENT_CPUM_CF_DIAG)
> + if (evsel == NULL)
> return;
>
> /* Display raw data on screen */
> - if (!s390_cpumcfdg_testctr(sample)) {
> - pr_err("Invalid counter set data encountered\n");
> + if (evsel->core.attr.config == PERF_EVENT_CPUM_CF_DIAG) {
> + evsel->pmu = perf_pmus__find("cpum_cf");
> + if (!s390_cpumcfdg_testctr(sample))
> + pr_err("Invalid counter set data encountered\n");
> + else
> + s390_cpumcfdg_dump(evsel->pmu, sample);
> return;
> }
> - s390_cpumcfdg_dump(evsel->pmu, sample);
> +
> + switch (evsel->core.attr.config) {
> + case PERF_EVENT_PAI_NNPA_ALL:
> + pai_name = "NNPA_ALL";
> + break;
> + case PERF_EVENT_PAI_CRYPTO_ALL:
> + pai_name = "CRYPTO_ALL";
> + break;
> + default:
> + return;
> + }
> +
> + if (!s390_pai_all_test(sample))
> + pr_err("Invalid %s raw data encountered\n", pai_name);
> + else
> + s390_pai_all_dump(evsel, sample);
> }
> --
> 2.41.0
>
>
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