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perf intel-pt: Pass the first timestamp to the decoder
VM Time Correlation will use time ranges to determine whether a TSC packet belongs to the Host or Guest. To start, the first non-zero timestamp is needed. Pass that to the decoder. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Reviewed-by: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: https://lore.kernel.org/r/20210430070309.17624-10-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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3 changed files with 31 additions and 0 deletions
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@ -140,6 +140,7 @@ struct intel_pt_decoder {
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uint64_t ctc_delta;
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uint64_t cycle_cnt;
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uint64_t cyc_ref_timestamp;
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uint64_t first_timestamp;
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uint32_t last_mtc;
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uint32_t tsc_ctc_ratio_n;
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uint32_t tsc_ctc_ratio_d;
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@ -265,6 +266,7 @@ struct intel_pt_decoder *intel_pt_decoder_new(struct intel_pt_params *params)
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decoder->branch_enable = params->branch_enable;
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decoder->hop = params->quick >= 1;
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decoder->leap = params->quick >= 2;
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decoder->first_timestamp = params->first_timestamp;
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decoder->flags = params->flags;
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@ -314,6 +316,12 @@ struct intel_pt_decoder *intel_pt_decoder_new(struct intel_pt_params *params)
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return decoder;
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}
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void intel_pt_set_first_timestamp(struct intel_pt_decoder *decoder,
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uint64_t first_timestamp)
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{
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decoder->first_timestamp = first_timestamp;
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}
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static void intel_pt_pop_blk(struct intel_pt_stack *stack)
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{
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struct intel_pt_blk *blk = stack->blk;
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@ -258,6 +258,7 @@ struct intel_pt_params {
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void *data;
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bool return_compression;
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bool branch_enable;
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uint64_t first_timestamp;
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uint64_t ctl;
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uint64_t period;
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enum intel_pt_period_type period_type;
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@ -285,4 +286,7 @@ unsigned char *intel_pt_find_overlap(unsigned char *buf_a, size_t len_a,
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int intel_pt__strerror(int code, char *buf, size_t buflen);
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void intel_pt_set_first_timestamp(struct intel_pt_decoder *decoder,
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uint64_t first_timestamp);
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#endif
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@ -78,6 +78,7 @@ struct intel_pt {
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u64 kernel_start;
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u64 switch_ip;
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u64 ptss_ip;
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u64 first_timestamp;
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struct perf_tsc_conversion tc;
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bool cap_user_time_zero;
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@ -1181,6 +1182,7 @@ static struct intel_pt_queue *intel_pt_alloc_queue(struct intel_pt *pt,
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params.tsc_ctc_ratio_n = pt->tsc_ctc_ratio_n;
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params.tsc_ctc_ratio_d = pt->tsc_ctc_ratio_d;
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params.quick = pt->synth_opts.quick;
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params.first_timestamp = pt->first_timestamp;
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if (pt->filts.cnt > 0)
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params.pgd_ip = intel_pt_pgd_ip;
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@ -1245,6 +1247,21 @@ static void intel_pt_free_queue(void *priv)
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free(ptq);
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}
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static void intel_pt_first_timestamp(struct intel_pt *pt, u64 timestamp)
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{
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unsigned int i;
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pt->first_timestamp = timestamp;
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for (i = 0; i < pt->queues.nr_queues; i++) {
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struct auxtrace_queue *queue = &pt->queues.queue_array[i];
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struct intel_pt_queue *ptq = queue->priv;
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if (ptq && ptq->decoder)
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intel_pt_set_first_timestamp(ptq->decoder, timestamp);
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}
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}
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static void intel_pt_set_pid_tid_cpu(struct intel_pt *pt,
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struct auxtrace_queue *queue)
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{
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@ -2947,6 +2964,8 @@ static int intel_pt_process_event(struct perf_session *session,
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sample->time);
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}
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} else if (timestamp) {
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if (!pt->first_timestamp)
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intel_pt_first_timestamp(pt, timestamp);
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err = intel_pt_process_queues(pt, timestamp);
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}
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if (err)
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