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authorAdrian Hunter <adrian.hunter@intel.com>2018-10-31 10:10:43 +0100
committerArnaldo Carvalho de Melo <acme@redhat.com>2018-10-31 16:56:26 +0100
commit5d4f0edaa3ac4f1844ed7c64cd2bae6f1912bac5 (patch)
treecd351a1f6724d308b7eb932e66891047cac9962c /tools/perf
parentperf intel-pt: Insert callchain context into synthesized callchains (diff)
downloadlinux-5d4f0edaa3ac4f1844ed7c64cd2bae6f1912bac5.tar.xz
linux-5d4f0edaa3ac4f1844ed7c64cd2bae6f1912bac5.zip
perf intel-pt/bts: Calculate cpumode for synthesized samples
In the absence of a fallback, samples must provide a correct cpumode for the 'ip'. Do that now there is no fallback. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Reviewed-by: Jiri Olsa <jolsa@kernel.org> Cc: Andi Kleen <ak@linux.intel.com> Cc: David S. Miller <davem@davemloft.net> Cc: Leo Yan <leo.yan@linaro.org> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: stable@vger.kernel.org # 4.19 Link: http://lkml.kernel.org/r/20181031091043.23465-6-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
-rw-r--r--tools/perf/util/intel-bts.c17
-rw-r--r--tools/perf/util/intel-pt.c22
2 files changed, 25 insertions, 14 deletions
diff --git a/tools/perf/util/intel-bts.c b/tools/perf/util/intel-bts.c
index 3b3a3d55dca1..7b27d77306c2 100644
--- a/tools/perf/util/intel-bts.c
+++ b/tools/perf/util/intel-bts.c
@@ -269,6 +269,13 @@ static int intel_bts_do_fix_overlap(struct auxtrace_queue *queue,
return 0;
}
+static inline u8 intel_bts_cpumode(struct intel_bts *bts, uint64_t ip)
+{
+ return machine__kernel_ip(bts->machine, ip) ?
+ PERF_RECORD_MISC_KERNEL :
+ PERF_RECORD_MISC_USER;
+}
+
static int intel_bts_synth_branch_sample(struct intel_bts_queue *btsq,
struct branch *branch)
{
@@ -281,12 +288,8 @@ static int intel_bts_synth_branch_sample(struct intel_bts_queue *btsq,
bts->num_events++ <= bts->synth_opts.initial_skip)
return 0;
- event.sample.header.type = PERF_RECORD_SAMPLE;
- event.sample.header.misc = PERF_RECORD_MISC_USER;
- event.sample.header.size = sizeof(struct perf_event_header);
-
- sample.cpumode = PERF_RECORD_MISC_USER;
sample.ip = le64_to_cpu(branch->from);
+ sample.cpumode = intel_bts_cpumode(bts, sample.ip);
sample.pid = btsq->pid;
sample.tid = btsq->tid;
sample.addr = le64_to_cpu(branch->to);
@@ -298,6 +301,10 @@ static int intel_bts_synth_branch_sample(struct intel_bts_queue *btsq,
sample.insn_len = btsq->intel_pt_insn.length;
memcpy(sample.insn, btsq->intel_pt_insn.buf, INTEL_PT_INSN_BUF_SZ);
+ event.sample.header.type = PERF_RECORD_SAMPLE;
+ event.sample.header.misc = sample.cpumode;
+ event.sample.header.size = sizeof(struct perf_event_header);
+
if (bts->synth_opts.inject) {
event.sample.header.size = bts->branches_event_size;
ret = perf_event__synthesize_sample(&event,
diff --git a/tools/perf/util/intel-pt.c b/tools/perf/util/intel-pt.c
index 60732213d16a..86cc9a64e982 100644
--- a/tools/perf/util/intel-pt.c
+++ b/tools/perf/util/intel-pt.c
@@ -407,6 +407,13 @@ intel_pt_cache_lookup(struct dso *dso, struct machine *machine, u64 offset)
return auxtrace_cache__lookup(dso->auxtrace_cache, offset);
}
+static inline u8 intel_pt_cpumode(struct intel_pt *pt, uint64_t ip)
+{
+ return ip >= pt->kernel_start ?
+ PERF_RECORD_MISC_KERNEL :
+ PERF_RECORD_MISC_USER;
+}
+
static int intel_pt_walk_next_insn(struct intel_pt_insn *intel_pt_insn,
uint64_t *insn_cnt_ptr, uint64_t *ip,
uint64_t to_ip, uint64_t max_insn_cnt,
@@ -429,10 +436,7 @@ static int intel_pt_walk_next_insn(struct intel_pt_insn *intel_pt_insn,
if (to_ip && *ip == to_ip)
goto out_no_cache;
- if (*ip >= ptq->pt->kernel_start)
- cpumode = PERF_RECORD_MISC_KERNEL;
- else
- cpumode = PERF_RECORD_MISC_USER;
+ cpumode = intel_pt_cpumode(ptq->pt, *ip);
thread = ptq->thread;
if (!thread) {
@@ -1059,15 +1063,11 @@ static void intel_pt_prep_b_sample(struct intel_pt *pt,
union perf_event *event,
struct perf_sample *sample)
{
- event->sample.header.type = PERF_RECORD_SAMPLE;
- event->sample.header.misc = PERF_RECORD_MISC_USER;
- event->sample.header.size = sizeof(struct perf_event_header);
-
if (!pt->timeless_decoding)
sample->time = tsc_to_perf_time(ptq->timestamp, &pt->tc);
- sample->cpumode = PERF_RECORD_MISC_USER;
sample->ip = ptq->state->from_ip;
+ sample->cpumode = intel_pt_cpumode(pt, sample->ip);
sample->pid = ptq->pid;
sample->tid = ptq->tid;
sample->addr = ptq->state->to_ip;
@@ -1076,6 +1076,10 @@ static void intel_pt_prep_b_sample(struct intel_pt *pt,
sample->flags = ptq->flags;
sample->insn_len = ptq->insn_len;
memcpy(sample->insn, ptq->insn, INTEL_PT_INSN_BUF_SZ);
+
+ event->sample.header.type = PERF_RECORD_SAMPLE;
+ event->sample.header.misc = sample->cpumode;
+ event->sample.header.size = sizeof(struct perf_event_header);
}
static int intel_pt_inject_event(union perf_event *event,