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Commit 0a7c700d authored by Adrian Hunter's avatar Adrian Hunter Committed by Arnaldo Carvalho de Melo
Browse files

perf intel-pt: Add decoder support for CBR events 



Add decoder support for informing the tools of changes to the core-to-bus
ratio (CBR).

Signed-off-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/1495786658-18063-16-git-send-email-adrian.hunter@intel.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 26fb2fb1

tools/perf/util/intel-pt-decoder/intel-pt-decoder.c

+19 −0
Original line number Diff line number Diff line
@@ -141,6 +141,7 @@ struct intel_pt_decoder { 
	int pkt_len;

	int last_packet_type;

	unsigned int cbr;

	unsigned int cbr_seen;

	unsigned int max_non_turbo_ratio;

	double max_non_turbo_ratio_fp;

	double cbr_cyc_to_tsc;
@@ -167,6 +168,7 @@ struct intel_pt_decoder { 
	uint64_t fup_ptw_payload;

	uint64_t fup_mwait_payload;

	uint64_t fup_pwre_payload;

	uint64_t cbr_payload;

	uint64_t timestamp_insn_cnt;

	uint64_t sample_insn_cnt;

	uint64_t stuck_ip;
@@ -1446,6 +1448,8 @@ static void intel_pt_calc_cbr(struct intel_pt_decoder *decoder) 
{

	unsigned int cbr = decoder->packet.payload & 0xff;



	decoder->cbr_payload = decoder->packet.payload;



	if (decoder->cbr == cbr)

		return;
@@ -1806,6 +1810,16 @@ static int intel_pt_walk_trace(struct intel_pt_decoder *decoder) 


		case INTEL_PT_CBR:

			intel_pt_calc_cbr(decoder);

			if (!decoder->branch_enable &&

			    decoder->cbr != decoder->cbr_seen) {

				decoder->cbr_seen = decoder->cbr;

				decoder->state.type = INTEL_PT_CBR_CHG;

				decoder->state.from_ip = decoder->ip;

				decoder->state.to_ip = 0;

				decoder->state.cbr_payload =

							decoder->packet.payload;

				return 0;

			}

			break;



		case INTEL_PT_MODE_EXEC:
@@ -2343,6 +2357,11 @@ const struct intel_pt_state *intel_pt_decode(struct intel_pt_decoder *decoder) 
		decoder->sample_insn_cnt = decoder->timestamp_insn_cnt;

	} else {

		decoder->state.err = 0;

		if (decoder->cbr != decoder->cbr_seen && decoder->state.type) {

			decoder->cbr_seen = decoder->cbr;

			decoder->state.type |= INTEL_PT_CBR_CHG;

			decoder->state.cbr_payload = decoder->cbr_payload;

		}

		if (intel_pt_sample_time(decoder->pkt_state)) {

			decoder->sample_timestamp = decoder->timestamp;

			decoder->sample_insn_cnt = decoder->timestamp_insn_cnt;

tools/perf/util/intel-pt-decoder/intel-pt-decoder.h

+2 −0
Original line number Diff line number Diff line
@@ -36,6 +36,7 @@ enum intel_pt_sample_type { 
	INTEL_PT_PWR_ENTRY	= 1 << 5,

	INTEL_PT_EX_STOP	= 1 << 6,

	INTEL_PT_PWR_EXIT	= 1 << 7,

	INTEL_PT_CBR_CHG	= 1 << 8,

};



enum intel_pt_period_type {
@@ -73,6 +74,7 @@ struct intel_pt_state { 
	uint64_t mwait_payload;

	uint64_t pwre_payload;

	uint64_t pwrx_payload;

	uint64_t cbr_payload;

	uint32_t flags;

	enum intel_pt_insn_op insn_op;

	int insn_len;