[PATCH 34/43] pert tools: Add queue management functionality
Arnaldo Carvalho de Melo
acme at kernel.org
Tue Jan 23 05:12:42 PST 2018
From: Mathieu Poirier <mathieu.poirier at linaro.org>
Add functionatlity to setup trace queues so that traces associated with
CoreSight auxtrace events found in the perf.data file can be classified
properly. The decoder and memory callback associated with each queue are
then used to decode the traces that have been assigned to that queue.
Co-authored-by: Tor Jeremiassen <tor at ti.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier at linaro.org>
Acked-by: Jiri Olsa <jolsa at redhat.com>
Cc: Adrian Hunter <adrian.hunter at intel.com>
Cc: Alexander Shishkin <alexander.shishkin at linux.intel.com>
Cc: Kim Phillips <kim.phillips at arm.com>
Cc: Mike Leach <mike.leach at arm.com>
Cc: Namhyung Kim <namhyung at kernel.org>
Cc: Peter Zijlstra <peterz at infradead.org>
Cc: Suzuki Poulouse <suzuki.poulose at arm.com>
Cc: linux-arm-kernel at lists.infradead.org
Link: http://lkml.kernel.org/r/1516211539-5166-8-git-send-email-mathieu.poirier@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme at redhat.com>
---
tools/perf/util/cs-etm.c | 208 ++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 204 insertions(+), 4 deletions(-)
diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
index cad429ce3c00..83eb676274b5 100644
--- a/tools/perf/util/cs-etm.c
+++ b/tools/perf/util/cs-etm.c
@@ -196,15 +196,215 @@ static void cs_etm__free(struct perf_session *session)
zfree(&aux);
}
+static u32 cs_etm__mem_access(struct cs_etm_queue *etmq, u64 address,
+ size_t size, u8 *buffer)
+{
+ u8 cpumode;
+ u64 offset;
+ int len;
+ struct thread *thread;
+ struct machine *machine;
+ struct addr_location al;
+
+ if (!etmq)
+ return -1;
+
+ machine = etmq->etm->machine;
+ if (address >= etmq->etm->kernel_start)
+ cpumode = PERF_RECORD_MISC_KERNEL;
+ else
+ cpumode = PERF_RECORD_MISC_USER;
+
+ thread = etmq->thread;
+ if (!thread) {
+ if (cpumode != PERF_RECORD_MISC_KERNEL)
+ return -EINVAL;
+ thread = etmq->etm->unknown_thread;
+ }
+
+ thread__find_addr_map(thread, cpumode, MAP__FUNCTION, address, &al);
+
+ if (!al.map || !al.map->dso)
+ return 0;
+
+ if (al.map->dso->data.status == DSO_DATA_STATUS_ERROR &&
+ dso__data_status_seen(al.map->dso, DSO_DATA_STATUS_SEEN_ITRACE))
+ return 0;
+
+ offset = al.map->map_ip(al.map, address);
+
+ map__load(al.map);
+
+ len = dso__data_read_offset(al.map->dso, machine, offset, buffer, size);
+
+ if (len <= 0)
+ return 0;
+
+ return len;
+}
+
+static struct cs_etm_queue *cs_etm__alloc_queue(struct cs_etm_auxtrace *etm,
+ unsigned int queue_nr)
+{
+ int i;
+ struct cs_etm_decoder_params d_params;
+ struct cs_etm_trace_params *t_params;
+ struct cs_etm_queue *etmq;
+
+ etmq = zalloc(sizeof(*etmq));
+ if (!etmq)
+ return NULL;
+
+ etmq->event_buf = malloc(PERF_SAMPLE_MAX_SIZE);
+ if (!etmq->event_buf)
+ goto out_free;
+
+ etmq->etm = etm;
+ etmq->queue_nr = queue_nr;
+ etmq->pid = -1;
+ etmq->tid = -1;
+ etmq->cpu = -1;
+
+ /* Use metadata to fill in trace parameters for trace decoder */
+ t_params = zalloc(sizeof(*t_params) * etm->num_cpu);
+
+ if (!t_params)
+ goto out_free;
+
+ for (i = 0; i < etm->num_cpu; i++) {
+ t_params[i].protocol = CS_ETM_PROTO_ETMV4i;
+ t_params[i].etmv4.reg_idr0 = etm->metadata[i][CS_ETMV4_TRCIDR0];
+ t_params[i].etmv4.reg_idr1 = etm->metadata[i][CS_ETMV4_TRCIDR1];
+ t_params[i].etmv4.reg_idr2 = etm->metadata[i][CS_ETMV4_TRCIDR2];
+ t_params[i].etmv4.reg_idr8 = etm->metadata[i][CS_ETMV4_TRCIDR8];
+ t_params[i].etmv4.reg_configr =
+ etm->metadata[i][CS_ETMV4_TRCCONFIGR];
+ t_params[i].etmv4.reg_traceidr =
+ etm->metadata[i][CS_ETMV4_TRCTRACEIDR];
+ }
+
+ /* Set decoder parameters to simply print the trace packets */
+ d_params.packet_printer = cs_etm__packet_dump;
+ d_params.operation = CS_ETM_OPERATION_DECODE;
+ d_params.formatted = true;
+ d_params.fsyncs = false;
+ d_params.hsyncs = false;
+ d_params.frame_aligned = true;
+ d_params.data = etmq;
+
+ etmq->decoder = cs_etm_decoder__new(etm->num_cpu, &d_params, t_params);
+
+ zfree(&t_params);
+
+ if (!etmq->decoder)
+ goto out_free;
+
+ /*
+ * Register a function to handle all memory accesses required by
+ * the trace decoder library.
+ */
+ if (cs_etm_decoder__add_mem_access_cb(etmq->decoder,
+ 0x0L, ((u64) -1L),
+ cs_etm__mem_access))
+ goto out_free_decoder;
+
+ etmq->offset = 0;
+
+ return etmq;
+
+out_free_decoder:
+ cs_etm_decoder__free(etmq->decoder);
+out_free:
+ zfree(&etmq->event_buf);
+ free(etmq);
+
+ return NULL;
+}
+
+static int cs_etm__setup_queue(struct cs_etm_auxtrace *etm,
+ struct auxtrace_queue *queue,
+ unsigned int queue_nr)
+{
+ struct cs_etm_queue *etmq = queue->priv;
+
+ if (list_empty(&queue->head) || etmq)
+ return 0;
+
+ etmq = cs_etm__alloc_queue(etm, queue_nr);
+
+ if (!etmq)
+ return -ENOMEM;
+
+ queue->priv = etmq;
+
+ if (queue->cpu != -1)
+ etmq->cpu = queue->cpu;
+
+ etmq->tid = queue->tid;
+
+ return 0;
+}
+
+static int cs_etm__setup_queues(struct cs_etm_auxtrace *etm)
+{
+ unsigned int i;
+ int ret;
+
+ for (i = 0; i < etm->queues.nr_queues; i++) {
+ ret = cs_etm__setup_queue(etm, &etm->queues.queue_array[i], i);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int cs_etm__update_queues(struct cs_etm_auxtrace *etm)
+{
+ if (etm->queues.new_data) {
+ etm->queues.new_data = false;
+ return cs_etm__setup_queues(etm);
+ }
+
+ return 0;
+}
+
static int cs_etm__process_event(struct perf_session *session,
union perf_event *event,
struct perf_sample *sample,
struct perf_tool *tool)
{
- (void) session;
- (void) event;
- (void) sample;
- (void) tool;
+ int err = 0;
+ u64 timestamp;
+ struct cs_etm_auxtrace *etm = container_of(session->auxtrace,
+ struct cs_etm_auxtrace,
+ auxtrace);
+
+ /* Keep compiler happy */
+ (void)event;
+
+ if (dump_trace)
+ return 0;
+
+ if (!tool->ordered_events) {
+ pr_err("CoreSight ETM Trace requires ordered events\n");
+ return -EINVAL;
+ }
+
+ if (!etm->timeless_decoding)
+ return -EINVAL;
+
+ if (sample->time && (sample->time != (u64) -1))
+ timestamp = sample->time;
+ else
+ timestamp = 0;
+
+ if (timestamp || etm->timeless_decoding) {
+ err = cs_etm__update_queues(etm);
+ if (err)
+ return err;
+ }
+
return 0;
}
--
2.14.3
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