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Subject[PATCH V6 01/12] perf tools: add debug prints
Date
It is useful to see the arguments to perf_event_open
and whether the perf events ring buffer was mmapped
per-cpu or per-thread. That information will now be
displayed when verbose is 2 i.e option -vv

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
---
tools/perf/util/evlist.c | 3 +++
tools/perf/util/evsel.c | 58 ++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 61 insertions(+)

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 42ea4e9..2b77b33 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -14,6 +14,7 @@
#include "target.h"
#include "evlist.h"
#include "evsel.h"
+#include "debug.h"
#include <unistd.h>

#include "parse-events.h"
@@ -454,6 +455,7 @@ static int perf_evlist__mmap_per_cpu(struct perf_evlist *evlist, int prot, int m
int nr_cpus = cpu_map__nr(evlist->cpus);
int nr_threads = thread_map__nr(evlist->threads);

+ pr_debug2("perf event ring buffer mmapped per cpu\n");
for (cpu = 0; cpu < nr_cpus; cpu++) {
int output = -1;

@@ -492,6 +494,7 @@ static int perf_evlist__mmap_per_thread(struct perf_evlist *evlist, int prot, in
int thread;
int nr_threads = thread_map__nr(evlist->threads);

+ pr_debug2("perf event ring buffer mmapped per thread\n");
for (thread = 0; thread < nr_threads; thread++) {
int output = -1;

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index a635461..0b9c4fd 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -21,6 +21,7 @@
#include "thread_map.h"
#include "target.h"
#include "perf_regs.h"
+#include "debug.h"

static struct {
bool sample_id_all;
@@ -817,6 +818,58 @@ static int get_group_fd(struct perf_evsel *evsel, int cpu, int thread)
return fd;
}

+static size_t perf_event_attr__fprintf(struct perf_event_attr *attr, FILE *fp)
+{
+ size_t ret;
+
+ ret = fprintf(fp, "------------------------------------------------------------\n");
+ ret += fprintf(fp, "perf_event_attr:\n");
+ ret += fprintf(fp, " type %u\n", attr->type);
+ ret += fprintf(fp, " size %u\n", attr->size);
+ ret += fprintf(fp, " config %#"PRIx64"\n", (uint64_t)attr->config);
+ ret += fprintf(fp, " sample_period %"PRIu64"\n", (uint64_t)attr->sample_period);
+ ret += fprintf(fp, " sample_freq %"PRIu64"\n", (uint64_t)attr->sample_freq);
+ ret += fprintf(fp, " sample_type %#"PRIx64"\n", (uint64_t)attr->sample_type);
+ ret += fprintf(fp, " read_format %#"PRIx64"\n", (uint64_t)attr->read_format);
+
+ ret += fprintf(fp, " disabled %u ", attr->disabled);
+ ret += fprintf(fp, "inherit %u\n", attr->inherit);
+ ret += fprintf(fp, " pinned %u ", attr->pinned);
+ ret += fprintf(fp, "exclusive %u\n", attr->exclusive);
+ ret += fprintf(fp, " exclude_user %u ", attr->exclude_user);
+ ret += fprintf(fp, "exclude_kernel %u\n", attr->exclude_kernel);
+ ret += fprintf(fp, " exclude_hv %u ", attr->exclude_hv);
+ ret += fprintf(fp, "exclude_idle %u\n", attr->exclude_idle);
+ ret += fprintf(fp, " mmap %u ", attr->mmap);
+ ret += fprintf(fp, "comm %u\n", attr->comm);
+ ret += fprintf(fp, " freq %u ", attr->freq);
+ ret += fprintf(fp, "inherit_stat %u\n", attr->inherit_stat);
+ ret += fprintf(fp, " enable_on_exec %u ", attr->enable_on_exec);
+ ret += fprintf(fp, "task %u\n", attr->task);
+ ret += fprintf(fp, " watermark %u ", attr->watermark);
+ ret += fprintf(fp, "precise_ip %u\n", attr->precise_ip);
+ ret += fprintf(fp, " mmap_data %u ", attr->mmap_data);
+ ret += fprintf(fp, "sample_id_all %u\n", attr->sample_id_all);
+ ret += fprintf(fp, " exclude_host %u ", attr->exclude_host);
+ ret += fprintf(fp, "exclude_guest %u\n", attr->exclude_guest);
+ ret += fprintf(fp, " excl.callchain.kern %u ", attr->exclude_callchain_kernel);
+ ret += fprintf(fp, "excl.callchain.user %u\n", attr->exclude_callchain_user);
+
+ ret += fprintf(fp, " wakeup_events %u\n", attr->wakeup_events);
+ ret += fprintf(fp, " wakeup_watermark %u\n", attr->wakeup_watermark);
+ ret += fprintf(fp, " bp_type %#x\n", attr->bp_type);
+ ret += fprintf(fp, " bp_addr %#"PRIx64"\n", (uint64_t)attr->bp_addr);
+ ret += fprintf(fp, " config1 %#"PRIx64"\n", (uint64_t)attr->config1);
+ ret += fprintf(fp, " bp_len %"PRIu64"\n", (uint64_t)attr->bp_len);
+ ret += fprintf(fp, " config2 %#"PRIx64"\n", (uint64_t)attr->config2);
+ ret += fprintf(fp, " branch_sample_type %#"PRIx64"\n", (uint64_t)attr->branch_sample_type);
+ ret += fprintf(fp, " sample_regs_user %#"PRIx64"\n", (uint64_t)attr->sample_regs_user);
+ ret += fprintf(fp, " sample_stack_user %u\n", attr->sample_stack_user);
+ ret += fprintf(fp, "------------------------------------------------------------\n");
+
+ return ret;
+}
+
static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
struct thread_map *threads)
{
@@ -840,6 +893,9 @@ retry_sample_id:
if (perf_missing_features.sample_id_all)
evsel->attr.sample_id_all = 0;

+ if (verbose >= 2)
+ perf_event_attr__fprintf(&evsel->attr, stderr);
+
for (cpu = 0; cpu < cpus->nr; cpu++) {

for (thread = 0; thread < threads->nr; thread++) {
@@ -850,6 +906,8 @@ retry_sample_id:

group_fd = get_group_fd(evsel, cpu, thread);

+ pr_debug2("perf_event_open: pid %d cpu %d group_fd %d flags %#lx\n",
+ pid, cpus->map[cpu], group_fd, flags);
FD(evsel, cpu, thread) = sys_perf_event_open(&evsel->attr,
pid,
cpus->map[cpu],
--
1.7.11.7


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