Commit 4d678e90 authored by Adrian Hunter's avatar Adrian Hunter Committed by Arnaldo Carvalho de Melo
Browse files

perf intel-pt: Add lookahead callback 



Add a callback function to enable the decoder to lookahead at subsequent
trace buffers. This will be used to implement a "fast forward" facility
which will be needed to support efficient time interval filtering.

Signed-off-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/20190604130017.31207-5-adrian.hunter@intel.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 4885c90c

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

+2 −0
Original line number Diff line number Diff line
@@ -104,6 +104,7 @@ struct intel_pt_decoder { 
			 uint64_t *insn_cnt_ptr, uint64_t *ip, uint64_t to_ip,

			 uint64_t max_insn_cnt, void *data);

	bool (*pgd_ip)(uint64_t ip, void *data);

	int (*lookahead)(void *data, intel_pt_lookahead_cb_t cb, void *cb_data);

	void *data;

	struct intel_pt_state state;

	const unsigned char *buf;
@@ -233,6 +234,7 @@ struct intel_pt_decoder *intel_pt_decoder_new(struct intel_pt_params *params) 
	decoder->get_trace          = params->get_trace;

	decoder->walk_insn          = params->walk_insn;

	decoder->pgd_ip             = params->pgd_ip;

	decoder->lookahead          = params->lookahead;

	decoder->data               = params->data;

	decoder->return_compression = params->return_compression;

	decoder->branch_enable      = params->branch_enable;

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

+3 −0
Original line number Diff line number Diff line
@@ -102,12 +102,15 @@ struct intel_pt_buffer { 
	uint64_t trace_nr;

};



typedef int (*intel_pt_lookahead_cb_t)(struct intel_pt_buffer *, void *);



struct intel_pt_params {

	int (*get_trace)(struct intel_pt_buffer *buffer, void *data);

	int (*walk_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, void *data);

	bool (*pgd_ip)(uint64_t ip, void *data);

	int (*lookahead)(void *data, intel_pt_lookahead_cb_t cb, void *cb_data);

	void *data;

	bool return_compression;

	bool branch_enable;

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