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Date: Tue, 7 Apr 2015 10:32:42 -0300
From: Arnaldo Carvalho de Melo <acme@...hat.com>
To: Peter Zijlstra <peterz@...radead.org>
Cc: Adrian Hunter <adrian.hunter@...el.com>,
Jiri Olsa <jolsa@...hat.com>, David Ahern <dsahern@...il.com>,
Stephane Eranian <eranian@...gle.com>,
Thomas Gleixner <tglx@...utronix.de>,
Linus Torvalds <torvalds@...ux-foundation.org>,
LKML <linux-kernel@...r.kernel.org>,
John Stultz <john.stultz@...aro.org>,
"H. Peter Anvin" <hpa@...or.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCH 2/2] perf, tools: Merge all perf_event_attr print
functions
Em Tue, Apr 07, 2015 at 11:09:54AM +0200, Peter Zijlstra escreveu:
> Currently there's 3 (that I found) different and incomplete
> implementations of printing perf_event_attr.
>
> This is quite silly. Merge the lot.
>
> While this patch does not retain the exact form all printing that I
> found is debug output and thus it should not be critical.
>
> Also, I cannot find a single print_event_desc() caller.
>
> Pre:
>
> $ perf record -vv -e cycles -- sleep 1
> ------------------------------------------------------------
If you do the above, i.e. start a line with ----, then the following
lines will go down the drain, fixing by prepending a whitespace :-)
- Arnaldo
> perf_event_attr:
> type 0
> size 104
> config 0
> sample_period 4000
> sample_freq 4000
> sample_type 0x107
> read_format 0
> disabled 1 inherit 1
> pinned 0 exclusive 0
> exclude_user 0 exclude_kernel 0
> exclude_hv 0 exclude_idle 0
> mmap 1 comm 1
> mmap2 1 comm_exec 1
> freq 1 inherit_stat 0
> enable_on_exec 1 task 1
> watermark 0 precise_ip 0
> mmap_data 0 sample_id_all 1
> exclude_host 0 exclude_guest 1
> excl.callchain_kern 0 excl.callchain_user 0
> wakeup_events 0
> wakeup_watermark 0
> bp_type 0
> bp_addr 0
> config1 0
> bp_len 0
> config2 0
> branch_sample_type 0
> sample_regs_user 0
> sample_stack_user 0
> sample_regs_intr 0
> ------------------------------------------------------------
>
> $ perf evlist -vv
> cycles: sample_freq=4000, size: 104, sample_type: IP|TID|TIME|PERIOD,
> disabled: 1, inherit: 1, mmap: 1, mmap2: 1, comm: 1, comm_exec: 1,
> freq: 1, enable_on_exec: 1, task: 1, sample_id_all: 1, exclude_guest:
> 1
>
> Post:
>
> $ ./perf record -vv -e cycles -- sleep 1
> ------------------------------------------------------------
> perf_event_attr:
> size 112
> { sample_period, sample_freq } 4000
> sample_type IP|TID|TIME|PERIOD
> disabled 1
> inherit 1
> mmap 1
> comm 1
> freq 1
> enable_on_exec 1
> task 1
> sample_id_all 1
> exclude_guest 1
> mmap2 1
> comm_exec 1
> ------------------------------------------------------------
>
> $ ./perf evlist -vv
> cycles: size: 112, { sample_period, sample_freq }: 4000, sample_type:
> IP|TID|TIME|PERIOD, disabled: 1, inherit: 1, mmap: 1, comm: 1, freq:
> 1, enable_on_exec: 1, task: 1, sample_id_all: 1, exclude_guest: 1,
> mmap2: 1, comm_exec: 1
>
> Cc: acme@...hat.com
> Acked-by: Adrian Hunter <adrian.hunter@...el.com>
> Acked-by: Ingo Molnar <mingo@...nel.org>
> Acked-by: Jiri Olsa <jolsa@...nel.org>
> Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
> ---
> tools/perf/util/evsel.c | 284 ++++++++++++++++++++---------------------------
> tools/perf/util/evsel.h | 6
> tools/perf/util/header.c | 29 +---
> 3 files changed, 139 insertions(+), 180 deletions(-)
>
> --- a/tools/perf/util/evsel.c
> +++ b/tools/perf/util/evsel.c
> @@ -1011,70 +1011,126 @@ static int get_group_fd(struct perf_evse
> return fd;
> }
>
> -#define __PRINT_ATTR(fmt, cast, field) \
> - fprintf(fp, " %-19s "fmt"\n", #field, cast attr->field)
> +struct bit_names {
> + int bit;
> + const char *name;
> +};
> +
> +static void __p_bits(char *buf, size_t size, u64 value, struct bit_names *bits)
> +{
> + bool first_bit = true;
> + int i = 0;
> +
> + do {
> + if (value & bits[i].bit) {
> + buf += scnprintf(buf, size, "%s%s", first_bit ? "" : "|", bits[i].name);
> + first_bit = false;
> + }
> + } while (bits[++i].name != NULL);
> +}
> +
> +static void __p_sample_type(char *buf, size_t size, u64 value)
> +{
> +#define bit_name(n) { PERF_SAMPLE_##n, #n }
> + struct bit_names bits[] = {
> + bit_name(IP), bit_name(TID), bit_name(TIME), bit_name(ADDR),
> + bit_name(READ), bit_name(CALLCHAIN), bit_name(ID), bit_name(CPU),
> + bit_name(PERIOD), bit_name(STREAM_ID), bit_name(RAW),
> + bit_name(BRANCH_STACK), bit_name(REGS_USER), bit_name(STACK_USER),
> + bit_name(IDENTIFIER), bit_name(REGS_INTR),
> + { .name = NULL, }
> + };
> +#undef bit_name
> + __p_bits(buf, size, value, bits);
> +}
>
> -#define PRINT_ATTR_U32(field) __PRINT_ATTR("%u" , , field)
> -#define PRINT_ATTR_X32(field) __PRINT_ATTR("%#x", , field)
> -#define PRINT_ATTR_U64(field) __PRINT_ATTR("%" PRIu64, (uint64_t), field)
> -#define PRINT_ATTR_X64(field) __PRINT_ATTR("%#"PRIx64, (uint64_t), field)
> -
> -#define PRINT_ATTR2N(name1, field1, name2, field2) \
> - fprintf(fp, " %-19s %u %-19s %u\n", \
> - name1, attr->field1, name2, attr->field2)
> -
> -#define PRINT_ATTR2(field1, field2) \
> - PRINT_ATTR2N(#field1, field1, #field2, field2)
> -
> -static size_t perf_event_attr__fprintf(struct perf_event_attr *attr, FILE *fp)
> -{
> - size_t ret = 0;
> -
> - ret += fprintf(fp, "%.60s\n", graph_dotted_line);
> - ret += fprintf(fp, "perf_event_attr:\n");
> -
> - ret += PRINT_ATTR_U32(type);
> - ret += PRINT_ATTR_U32(size);
> - ret += PRINT_ATTR_X64(config);
> - ret += PRINT_ATTR_U64(sample_period);
> - ret += PRINT_ATTR_U64(sample_freq);
> - ret += PRINT_ATTR_X64(sample_type);
> - ret += PRINT_ATTR_X64(read_format);
> -
> - ret += PRINT_ATTR2(disabled, inherit);
> - ret += PRINT_ATTR2(pinned, exclusive);
> - ret += PRINT_ATTR2(exclude_user, exclude_kernel);
> - ret += PRINT_ATTR2(exclude_hv, exclude_idle);
> - ret += PRINT_ATTR2(mmap, comm);
> - ret += PRINT_ATTR2(freq, inherit_stat);
> - ret += PRINT_ATTR2(enable_on_exec, task);
> - ret += PRINT_ATTR2(watermark, precise_ip);
> - ret += PRINT_ATTR2(mmap_data, sample_id_all);
> - ret += PRINT_ATTR2(exclude_host, exclude_guest);
> - ret += PRINT_ATTR2N("excl.callchain_kern", exclude_callchain_kernel,
> - "excl.callchain_user", exclude_callchain_user);
> - ret += PRINT_ATTR2(mmap2, comm_exec);
> - ret += __PRINT_ATTR("%u",,use_clockid);
> -
> -
> - ret += PRINT_ATTR_U32(wakeup_events);
> - ret += PRINT_ATTR_U32(wakeup_watermark);
> - ret += PRINT_ATTR_X32(bp_type);
> - ret += PRINT_ATTR_X64(bp_addr);
> - ret += PRINT_ATTR_X64(config1);
> - ret += PRINT_ATTR_U64(bp_len);
> - ret += PRINT_ATTR_X64(config2);
> - ret += PRINT_ATTR_X64(branch_sample_type);
> - ret += PRINT_ATTR_X64(sample_regs_user);
> - ret += PRINT_ATTR_U32(sample_stack_user);
> - ret += PRINT_ATTR_U32(clockid);
> - ret += PRINT_ATTR_X64(sample_regs_intr);
> +static void __p_read_format(char *buf, size_t size, u64 value)
> +{
> +#define bit_name(n) { PERF_FORMAT_##n, #n }
> + struct bit_names bits[] = {
> + bit_name(TOTAL_TIME_ENABLED), bit_name(TOTAL_TIME_RUNNING),
> + bit_name(ID), bit_name(GROUP),
> + { .name = NULL, }
> + };
> +#undef bit_name
> + __p_bits(buf, size, value, bits);
> +}
> +
> +#define BUF_SIZE 1024
> +
> +#define p_hex(val) snprintf(buf, BUF_SIZE, "%"PRIx64, (uint64_t)(val))
> +#define p_unsigned(val) snprintf(buf, BUF_SIZE, "%"PRIu64, (uint64_t)(val))
> +#define p_signed(val) snprintf(buf, BUF_SIZE, "%"PRId64, (int64_t)(val))
> +#define p_sample_type(val) __p_sample_type(buf, BUF_SIZE, val)
> +#define p_read_format(val) __p_read_format(buf, BUF_SIZE, val)
> +
> +#define PRINT_ATTRn(_n, _f, _p) \
> +do { \
> + if (attr->_f) { \
> + _p(attr->_f); \
> + ret += attr__fprintf(fp, _n, buf, priv);\
> + } \
> +} while (0)
>
> - ret += fprintf(fp, "%.60s\n", graph_dotted_line);
> +#define PRINT_ATTRf(_f, _p) PRINT_ATTRn(#_f, _f, _p)
> +
> +int perf_event_attr__fprintf(FILE *fp, struct perf_event_attr *attr,
> + attr__fprintf_f attr__fprintf, void *priv)
> +{
> + char buf[BUF_SIZE];
> + int ret = 0;
> +
> + PRINT_ATTRf(type, p_unsigned);
> + PRINT_ATTRf(size, p_unsigned);
> + PRINT_ATTRf(config, p_hex);
> + PRINT_ATTRn("{ sample_period, sample_freq }", sample_period, p_unsigned);
> + PRINT_ATTRf(sample_type, p_sample_type);
> + PRINT_ATTRf(read_format, p_read_format);
> +
> + PRINT_ATTRf(disabled, p_unsigned);
> + PRINT_ATTRf(inherit, p_unsigned);
> + PRINT_ATTRf(pinned, p_unsigned);
> + PRINT_ATTRf(exclusive, p_unsigned);
> + PRINT_ATTRf(exclude_user, p_unsigned);
> + PRINT_ATTRf(exclude_kernel, p_unsigned);
> + PRINT_ATTRf(exclude_hv, p_unsigned);
> + PRINT_ATTRf(exclude_idle, p_unsigned);
> + PRINT_ATTRf(mmap, p_unsigned);
> + PRINT_ATTRf(comm, p_unsigned);
> + PRINT_ATTRf(freq, p_unsigned);
> + PRINT_ATTRf(inherit_stat, p_unsigned);
> + PRINT_ATTRf(enable_on_exec, p_unsigned);
> + PRINT_ATTRf(task, p_unsigned);
> + PRINT_ATTRf(watermark, p_unsigned);
> + PRINT_ATTRf(precise_ip, p_unsigned);
> + PRINT_ATTRf(mmap_data, p_unsigned);
> + PRINT_ATTRf(sample_id_all, p_unsigned);
> + PRINT_ATTRf(exclude_host, p_unsigned);
> + PRINT_ATTRf(exclude_guest, p_unsigned);
> + PRINT_ATTRf(exclude_callchain_kernel, p_unsigned);
> + PRINT_ATTRf(exclude_callchain_user, p_unsigned);
> + PRINT_ATTRf(mmap2, p_unsigned);
> + PRINT_ATTRf(comm_exec, p_unsigned);
> + PRINT_ATTRf(use_clockid, p_unsigned);
> +
> + PRINT_ATTRn("{ wakeup_events, wakeup_watermark }", wakeup_events, p_unsigned);
> + PRINT_ATTRf(bp_type, p_unsigned);
> + PRINT_ATTRn("{ bp_addr, config1 }", bp_addr, p_hex);
> + PRINT_ATTRn("{ bp_len, config2 }", bp_len, p_hex);
> + PRINT_ATTRf(sample_regs_user, p_hex);
> + PRINT_ATTRf(sample_stack_user, p_unsigned);
> + PRINT_ATTRf(clockid, p_signed);
> + PRINT_ATTRf(sample_regs_intr, p_hex);
>
> return ret;
> }
>
> +static int __open_attr__fprintf(FILE *fp, const char *name, const char *val,
> + void *priv __attribute__((unused)))
> +{
> + return fprintf(fp, " %-32s %s\n", name, val);
> +}
> +
> static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
> struct thread_map *threads)
> {
> @@ -1114,8 +1170,12 @@ static int __perf_evsel__open(struct per
> if (perf_missing_features.sample_id_all)
> evsel->attr.sample_id_all = 0;
>
> - if (verbose >= 2)
> - perf_event_attr__fprintf(&evsel->attr, stderr);
> + if (verbose >= 2) {
> + fprintf(stderr, "%.60s\n", graph_dotted_line);
> + fprintf(stderr, "perf_event_attr:\n");
> + perf_event_attr__fprintf(stderr, &evsel->attr, __open_attr__fprintf, NULL);
> + fprintf(stderr, "%.60s\n", graph_dotted_line);
> + }
>
> for (cpu = 0; cpu < cpus->nr; cpu++) {
>
> @@ -1996,62 +2056,9 @@ static int comma_fprintf(FILE *fp, bool
> return ret;
> }
>
> -static int __if_fprintf(FILE *fp, bool *first, const char *field, u64 value)
> +static int __print_attr__fprintf(FILE *fp, const char *name, const char *val, void *priv)
> {
> - if (value == 0)
> - return 0;
> -
> - return comma_fprintf(fp, first, " %s: %" PRIu64, field, value);
> -}
> -
> -#define if_print(field) printed += __if_fprintf(fp, &first, #field, evsel->attr.field)
> -
> -struct bit_names {
> - int bit;
> - const char *name;
> -};
> -
> -static int bits__fprintf(FILE *fp, const char *field, u64 value,
> - struct bit_names *bits, bool *first)
> -{
> - int i = 0, printed = comma_fprintf(fp, first, " %s: ", field);
> - bool first_bit = true;
> -
> - do {
> - if (value & bits[i].bit) {
> - printed += fprintf(fp, "%s%s", first_bit ? "" : "|", bits[i].name);
> - first_bit = false;
> - }
> - } while (bits[++i].name != NULL);
> -
> - return printed;
> -}
> -
> -static int sample_type__fprintf(FILE *fp, bool *first, u64 value)
> -{
> -#define bit_name(n) { PERF_SAMPLE_##n, #n }
> - struct bit_names bits[] = {
> - bit_name(IP), bit_name(TID), bit_name(TIME), bit_name(ADDR),
> - bit_name(READ), bit_name(CALLCHAIN), bit_name(ID), bit_name(CPU),
> - bit_name(PERIOD), bit_name(STREAM_ID), bit_name(RAW),
> - bit_name(BRANCH_STACK), bit_name(REGS_USER), bit_name(STACK_USER),
> - bit_name(IDENTIFIER), bit_name(REGS_INTR),
> - { .name = NULL, }
> - };
> -#undef bit_name
> - return bits__fprintf(fp, "sample_type", value, bits, first);
> -}
> -
> -static int read_format__fprintf(FILE *fp, bool *first, u64 value)
> -{
> -#define bit_name(n) { PERF_FORMAT_##n, #n }
> - struct bit_names bits[] = {
> - bit_name(TOTAL_TIME_ENABLED), bit_name(TOTAL_TIME_RUNNING),
> - bit_name(ID), bit_name(GROUP),
> - { .name = NULL, }
> - };
> -#undef bit_name
> - return bits__fprintf(fp, "read_format", value, bits, first);
> + return comma_fprintf(fp, (bool *)priv, " %s: %s", name, val);
> }
>
> int perf_evsel__fprintf(struct perf_evsel *evsel,
> @@ -2080,52 +2087,13 @@ int perf_evsel__fprintf(struct perf_evse
>
> printed += fprintf(fp, "%s", perf_evsel__name(evsel));
>
> - if (details->verbose || details->freq) {
> + if (details->verbose) {
> + printed += perf_event_attr__fprintf(fp, &evsel->attr,
> + __print_attr__fprintf, &first);
> + } else if (details->freq) {
> printed += comma_fprintf(fp, &first, " sample_freq=%" PRIu64,
> (u64)evsel->attr.sample_freq);
> }
> -
> - if (details->verbose) {
> - if_print(type);
> - if_print(config);
> - if_print(config1);
> - if_print(config2);
> - if_print(size);
> - printed += sample_type__fprintf(fp, &first, evsel->attr.sample_type);
> - if (evsel->attr.read_format)
> - printed += read_format__fprintf(fp, &first, evsel->attr.read_format);
> - if_print(disabled);
> - if_print(inherit);
> - if_print(pinned);
> - if_print(exclusive);
> - if_print(exclude_user);
> - if_print(exclude_kernel);
> - if_print(exclude_hv);
> - if_print(exclude_idle);
> - if_print(mmap);
> - if_print(comm);
> - if_print(freq);
> - if_print(inherit_stat);
> - if_print(enable_on_exec);
> - if_print(task);
> - if_print(watermark);
> - if_print(precise_ip);
> - if_print(mmap_data);
> - if_print(sample_id_all);
> - if_print(exclude_host);
> - if_print(exclude_guest);
> - if_print(mmap2);
> - if_print(comm_exec);
> - if_print(use_clockid);
> - if_print(__reserved_1);
> - if_print(wakeup_events);
> - if_print(bp_type);
> - if_print(branch_sample_type);
> - if_print(sample_regs_user);
> - if_print(sample_stack_user);
> - if_print(clockid);
> - if_print(sample_regs_intr);
> - }
> out:
> fputc('\n', fp);
> return ++printed;
> --- a/tools/perf/util/evsel.h
> +++ b/tools/perf/util/evsel.h
> @@ -359,4 +359,10 @@ static inline bool has_branch_callstack(
> {
> return evsel->attr.branch_sample_type & PERF_SAMPLE_BRANCH_CALL_STACK;
> }
> +
> +typedef int (*attr__fprintf_f)(FILE *, const char *, const char *, void *);
> +
> +int perf_event_attr__fprintf(FILE *fp, struct perf_event_attr *attr,
> + attr__fprintf_f attr__fprintf, void *priv);
> +
> #endif /* __PERF_EVSEL_H */
> --- a/tools/perf/util/header.c
> +++ b/tools/perf/util/header.c
> @@ -1055,6 +1055,12 @@ read_event_desc(struct perf_header *ph,
> goto out;
> }
>
> +static int __desc_attr__fprintf(FILE *fp, const char *name, const char *val,
> + void *priv __attribute__((unused)))
> +{
> + return fprintf(fp, ", %s = %s", name, val);
> +}
> +
> static void print_event_desc(struct perf_header *ph, int fd, FILE *fp)
> {
> struct perf_evsel *evsel, *events = read_event_desc(ph, fd);
> @@ -1069,26 +1075,6 @@ static void print_event_desc(struct perf
> for (evsel = events; evsel->attr.size; evsel++) {
> fprintf(fp, "# event : name = %s, ", evsel->name);
>
> - fprintf(fp, "type = %d, config = 0x%"PRIx64
> - ", config1 = 0x%"PRIx64", config2 = 0x%"PRIx64,
> - evsel->attr.type,
> - (u64)evsel->attr.config,
> - (u64)evsel->attr.config1,
> - (u64)evsel->attr.config2);
> -
> - fprintf(fp, ", excl_usr = %d, excl_kern = %d",
> - evsel->attr.exclude_user,
> - evsel->attr.exclude_kernel);
> -
> - fprintf(fp, ", excl_host = %d, excl_guest = %d",
> - evsel->attr.exclude_host,
> - evsel->attr.exclude_guest);
> -
> - fprintf(fp, ", precise_ip = %d", evsel->attr.precise_ip);
> -
> - fprintf(fp, ", attr_mmap2 = %d", evsel->attr.mmap2);
> - fprintf(fp, ", attr_mmap = %d", evsel->attr.mmap);
> - fprintf(fp, ", attr_mmap_data = %d", evsel->attr.mmap_data);
> if (evsel->ids) {
> fprintf(fp, ", id = {");
> for (j = 0, id = evsel->id; j < evsel->ids; j++, id++) {
> @@ -1098,9 +1084,8 @@ static void print_event_desc(struct perf
> }
> fprintf(fp, " }");
> }
> - if (evsel->attr.use_clockid)
> - fprintf(fp, ", clockid = %d", evsel->attr.clockid);
>
> + perf_event_attr__fprintf(fp, &evsel->attr, __desc_attr__fprintf, NULL);
>
> fputc('\n', fp);
> }
>
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