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-rw-r--r--tools/perf/util/cs-etm.c83
1 files changed, 50 insertions, 33 deletions
diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
index 7e63e7dedc33..32ad92d3e454 100644
--- a/tools/perf/util/cs-etm.c
+++ b/tools/perf/util/cs-etm.c
@@ -38,8 +38,6 @@
#include <tools/libc_compat.h>
#include "util/synthetic-events.h"
-#define MAX_TIMESTAMP (~0ULL)
-
struct cs_etm_auxtrace {
struct auxtrace auxtrace;
struct auxtrace_queues queues;
@@ -56,6 +54,7 @@ struct cs_etm_auxtrace {
u8 sample_instructions;
int num_cpu;
+ u64 latest_kernel_timestamp;
u32 auxtrace_type;
u64 branches_sample_type;
u64 branches_id;
@@ -86,7 +85,7 @@ struct cs_etm_queue {
struct cs_etm_decoder *decoder;
struct auxtrace_buffer *buffer;
unsigned int queue_nr;
- u8 pending_timestamp;
+ u8 pending_timestamp_chan_id;
u64 offset;
const unsigned char *buf;
size_t buf_len, buf_used;
@@ -208,7 +207,7 @@ void cs_etm__etmq_set_traceid_queue_timestamp(struct cs_etm_queue *etmq,
* be more than one channel per cs_etm_queue, we need to specify
* what traceID queue needs servicing.
*/
- etmq->pending_timestamp = trace_chan_id;
+ etmq->pending_timestamp_chan_id = trace_chan_id;
}
static u64 cs_etm__etmq_get_timestamp(struct cs_etm_queue *etmq,
@@ -216,22 +215,22 @@ static u64 cs_etm__etmq_get_timestamp(struct cs_etm_queue *etmq,
{
struct cs_etm_packet_queue *packet_queue;
- if (!etmq->pending_timestamp)
+ if (!etmq->pending_timestamp_chan_id)
return 0;
if (trace_chan_id)
- *trace_chan_id = etmq->pending_timestamp;
+ *trace_chan_id = etmq->pending_timestamp_chan_id;
packet_queue = cs_etm__etmq_get_packet_queue(etmq,
- etmq->pending_timestamp);
+ etmq->pending_timestamp_chan_id);
if (!packet_queue)
return 0;
/* Acknowledge pending status */
- etmq->pending_timestamp = 0;
+ etmq->pending_timestamp_chan_id = 0;
/* See function cs_etm_decoder__do_{hard|soft}_timestamp() */
- return packet_queue->timestamp;
+ return packet_queue->cs_timestamp;
}
static void cs_etm__clear_packet_queue(struct cs_etm_packet_queue *queue)
@@ -814,7 +813,7 @@ static int cs_etm__setup_queue(struct cs_etm_auxtrace *etm,
int ret = 0;
unsigned int cs_queue_nr;
u8 trace_chan_id;
- u64 timestamp;
+ u64 cs_timestamp;
struct cs_etm_queue *etmq = queue->priv;
if (list_empty(&queue->head) || etmq)
@@ -854,7 +853,7 @@ static int cs_etm__setup_queue(struct cs_etm_auxtrace *etm,
/*
* Run decoder on the trace block. The decoder will stop when
- * encountering a timestamp, a full packet queue or the end of
+ * encountering a CS timestamp, a full packet queue or the end of
* trace for that block.
*/
ret = cs_etm__decode_data_block(etmq);
@@ -865,10 +864,10 @@ static int cs_etm__setup_queue(struct cs_etm_auxtrace *etm,
* Function cs_etm_decoder__do_{hard|soft}_timestamp() does all
* the timestamp calculation for us.
*/
- timestamp = cs_etm__etmq_get_timestamp(etmq, &trace_chan_id);
+ cs_timestamp = cs_etm__etmq_get_timestamp(etmq, &trace_chan_id);
/* We found a timestamp, no need to continue. */
- if (timestamp)
+ if (cs_timestamp)
break;
/*
@@ -892,7 +891,7 @@ static int cs_etm__setup_queue(struct cs_etm_auxtrace *etm,
* queue and will be processed in cs_etm__process_queues().
*/
cs_queue_nr = TO_CS_QUEUE_NR(queue_nr, trace_chan_id);
- ret = auxtrace_heap__add(&etm->heap, cs_queue_nr, timestamp);
+ ret = auxtrace_heap__add(&etm->heap, cs_queue_nr, cs_timestamp);
out:
return ret;
}
@@ -1194,6 +1193,8 @@ static int cs_etm__synth_instruction_sample(struct cs_etm_queue *etmq,
event->sample.header.misc = cs_etm__cpu_mode(etmq, addr);
event->sample.header.size = sizeof(struct perf_event_header);
+ if (!etm->timeless_decoding)
+ sample.time = etm->latest_kernel_timestamp;
sample.ip = addr;
sample.pid = tidq->pid;
sample.tid = tidq->tid;
@@ -1250,6 +1251,8 @@ static int cs_etm__synth_branch_sample(struct cs_etm_queue *etmq,
event->sample.header.misc = cs_etm__cpu_mode(etmq, ip);
event->sample.header.size = sizeof(struct perf_event_header);
+ if (!etm->timeless_decoding)
+ sample.time = etm->latest_kernel_timestamp;
sample.ip = ip;
sample.pid = tidq->pid;
sample.tid = tidq->tid;
@@ -2221,7 +2224,7 @@ static int cs_etm__process_queues(struct cs_etm_auxtrace *etm)
int ret = 0;
unsigned int cs_queue_nr, queue_nr;
u8 trace_chan_id;
- u64 timestamp;
+ u64 cs_timestamp;
struct auxtrace_queue *queue;
struct cs_etm_queue *etmq;
struct cs_etm_traceid_queue *tidq;
@@ -2283,9 +2286,9 @@ refetch:
if (ret)
goto out;
- timestamp = cs_etm__etmq_get_timestamp(etmq, &trace_chan_id);
+ cs_timestamp = cs_etm__etmq_get_timestamp(etmq, &trace_chan_id);
- if (!timestamp) {
+ if (!cs_timestamp) {
/*
* Function cs_etm__decode_data_block() returns when
* there is no more traces to decode in the current
@@ -2308,7 +2311,7 @@ refetch:
* this queue/traceID.
*/
cs_queue_nr = TO_CS_QUEUE_NR(queue_nr, trace_chan_id);
- ret = auxtrace_heap__add(&etm->heap, cs_queue_nr, timestamp);
+ ret = auxtrace_heap__add(&etm->heap, cs_queue_nr, cs_timestamp);
}
out:
@@ -2380,7 +2383,7 @@ static int cs_etm__process_event(struct perf_session *session,
struct perf_tool *tool)
{
int err = 0;
- u64 timestamp;
+ u64 sample_kernel_timestamp;
struct cs_etm_auxtrace *etm = container_of(session->auxtrace,
struct cs_etm_auxtrace,
auxtrace);
@@ -2394,16 +2397,21 @@ static int cs_etm__process_event(struct perf_session *session,
}
if (sample->time && (sample->time != (u64) -1))
- timestamp = sample->time;
+ sample_kernel_timestamp = sample->time;
else
- timestamp = 0;
+ sample_kernel_timestamp = 0;
- if (timestamp || etm->timeless_decoding) {
+ if (sample_kernel_timestamp || etm->timeless_decoding) {
err = cs_etm__update_queues(etm);
if (err)
return err;
}
+ /*
+ * Don't wait for cs_etm__flush_events() in per-thread/timeless mode to start the decode. We
+ * need the tid of the PERF_RECORD_EXIT event to assign to the synthesised samples because
+ * ETM_OPT_CTXTID is not enabled.
+ */
if (etm->timeless_decoding &&
event->header.type == PERF_RECORD_EXIT)
return cs_etm__process_timeless_queues(etm,
@@ -2414,9 +2422,14 @@ static int cs_etm__process_event(struct perf_session *session,
else if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE)
return cs_etm__process_switch_cpu_wide(etm, event);
- if (!etm->timeless_decoding &&
- event->header.type == PERF_RECORD_AUX)
- return cs_etm__process_queues(etm);
+ if (!etm->timeless_decoding && event->header.type == PERF_RECORD_AUX) {
+ /*
+ * Record the latest kernel timestamp available in the header
+ * for samples so that synthesised samples occur from this point
+ * onwards.
+ */
+ etm->latest_kernel_timestamp = sample_kernel_timestamp;
+ }
return 0;
}
@@ -2464,6 +2477,10 @@ static bool cs_etm__is_timeless_decoding(struct cs_etm_auxtrace *etm)
struct evlist *evlist = etm->session->evlist;
bool timeless_decoding = true;
+ /* Override timeless mode with user input from --itrace=Z */
+ if (etm->synth_opts.timeless_decoding)
+ return true;
+
/*
* Circle through the list of event and complain if we find one
* with the time bit set.
@@ -2810,6 +2827,14 @@ int cs_etm__process_auxtrace_info(union perf_event *event,
if (err)
goto err_free_etm;
+ if (session->itrace_synth_opts->set) {
+ etm->synth_opts = *session->itrace_synth_opts;
+ } else {
+ itrace_synth_opts__set_default(&etm->synth_opts,
+ session->itrace_synth_opts->default_no_sample);
+ etm->synth_opts.callchain = false;
+ }
+
etm->session = session;
etm->machine = &session->machines.host;
@@ -2854,14 +2879,6 @@ int cs_etm__process_auxtrace_info(union perf_event *event,
return 0;
}
- if (session->itrace_synth_opts->set) {
- etm->synth_opts = *session->itrace_synth_opts;
- } else {
- itrace_synth_opts__set_default(&etm->synth_opts,
- session->itrace_synth_opts->default_no_sample);
- etm->synth_opts.callchain = false;
- }
-
err = cs_etm__synth_events(etm, session);
if (err)
goto err_delete_thread;
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-11 15:40:58 +0000