perf tools: Add decoder mechanic to support dumping trace data (68ffe390) · Commits · 戴 / test

tools/perf/util/Build

+1 −0

Original line number	Diff line number	Diff line
		@@ -91,6 +91,7 @@ libperf-$(CONFIG_AUXTRACE) += arm-spe-pkt-decoder.o

		ifdef CONFIG_LIBOPENCSD
		libperf-$(CONFIG_AUXTRACE) += cs-etm.o
		libperf-$(CONFIG_AUXTRACE) += cs-etm-decoder/
		endif

		libperf-y += parse-branch-options.o

tools/perf/util/cs-etm-decoder/Build

0 → 100644

+1 −0

Original line number	Diff line number	Diff line
		libperf-$(CONFIG_AUXTRACE) += cs-etm-decoder.o

tools/perf/util/cs-etm-decoder/cs-etm-decoder.c

0 → 100644

+334 −0

Original line number	Diff line number	Diff line
		/*
		* SPDX-License-Identifier: GPL-2.0
		*
		* Copyright(C) 2015-2018 Linaro Limited.
		*
		* Author: Tor Jeremiassen <tor@ti.com>
		* Author: Mathieu Poirier <mathieu.poirier@linaro.org>
		*/

		#include <linux/err.h>
		#include <linux/list.h>
		#include <stdlib.h>
		#include <opencsd/c_api/opencsd_c_api.h>
		#include <opencsd/etmv4/trc_pkt_types_etmv4.h>
		#include <opencsd/ocsd_if_types.h>

		#include "cs-etm.h"
		#include "cs-etm-decoder.h"
		#include "intlist.h"
		#include "util.h"

		#define MAX_BUFFER 1024

		/* use raw logging */
		#ifdef CS_DEBUG_RAW
		#define CS_LOG_RAW_FRAMES
		#ifdef CS_RAW_PACKED
		#define CS_RAW_DEBUG_FLAGS (OCSD_DFRMTR_UNPACKED_RAW_OUT \| \
		OCSD_DFRMTR_PACKED_RAW_OUT)
		#else
		#define CS_RAW_DEBUG_FLAGS (OCSD_DFRMTR_UNPACKED_RAW_OUT)
		#endif
		#endif

		struct cs_etm_decoder {
		void *data;
		void (packet_printer)(const char msg);
		bool trace_on;
		dcd_tree_handle_t dcd_tree;
		cs_etm_mem_cb_type mem_access;
		ocsd_datapath_resp_t prev_return;
		u32 packet_count;
		u32 head;
		u32 tail;
		struct cs_etm_packet packet_buffer[MAX_BUFFER];
		};

		static void cs_etm_decoder__gen_etmv4_config(struct cs_etm_trace_params *params,
		ocsd_etmv4_cfg *config)
		{
		config->reg_configr = params->etmv4.reg_configr;
		config->reg_traceidr = params->etmv4.reg_traceidr;
		config->reg_idr0 = params->etmv4.reg_idr0;
		config->reg_idr1 = params->etmv4.reg_idr1;
		config->reg_idr2 = params->etmv4.reg_idr2;
		config->reg_idr8 = params->etmv4.reg_idr8;
		config->reg_idr9 = 0;
		config->reg_idr10 = 0;
		config->reg_idr11 = 0;
		config->reg_idr12 = 0;
		config->reg_idr13 = 0;
		config->arch_ver = ARCH_V8;
		config->core_prof = profile_CortexA;
		}

		static void cs_etm_decoder__print_str_cb(const void *p_context,
		const char *msg,
		const int str_len)
		{
		if (p_context && str_len)
		((struct cs_etm_decoder *)p_context)->packet_printer(msg);
		}

		static int
		cs_etm_decoder__init_def_logger_printing(struct cs_etm_decoder_params *d_params,
		struct cs_etm_decoder *decoder)
		{
		int ret = 0;

		if (d_params->packet_printer == NULL)
		return -1;

		decoder->packet_printer = d_params->packet_printer;

		/*
		* Set up a library default logger to process any printers
		* (packet/raw frame) we add later.
		*/
		ret = ocsd_def_errlog_init(OCSD_ERR_SEV_ERROR, 1);
		if (ret != 0)
		return -1;

		/* no stdout / err / file output */
		ret = ocsd_def_errlog_config_output(C_API_MSGLOGOUT_FLG_NONE, NULL);
		if (ret != 0)
		return -1;

		/*
		* Set the string CB for the default logger, passes strings to
		* perf print logger.
		*/
		ret = ocsd_def_errlog_set_strprint_cb(decoder->dcd_tree,
		(void *)decoder,
		cs_etm_decoder__print_str_cb);
		if (ret != 0)
		ret = -1;

		return 0;
		}

		#ifdef CS_LOG_RAW_FRAMES
		static void
		cs_etm_decoder__init_raw_frame_logging(struct cs_etm_decoder_params *d_params,
		struct cs_etm_decoder *decoder)
		{
		/* Only log these during a --dump operation */
		if (d_params->operation == CS_ETM_OPERATION_PRINT) {
		/* set up a library default logger to process the
		* raw frame printer we add later
		*/
		ocsd_def_errlog_init(OCSD_ERR_SEV_ERROR, 1);

		/* no stdout / err / file output */
		ocsd_def_errlog_config_output(C_API_MSGLOGOUT_FLG_NONE, NULL);

		/* set the string CB for the default logger,
		* passes strings to perf print logger.
		*/
		ocsd_def_errlog_set_strprint_cb(decoder->dcd_tree,
		(void *)decoder,
		cs_etm_decoder__print_str_cb);

		/* use the built in library printer for the raw frames */
		ocsd_dt_set_raw_frame_printer(decoder->dcd_tree,
		CS_RAW_DEBUG_FLAGS);
		}
		}
		#else
		static void
		cs_etm_decoder__init_raw_frame_logging(
		struct cs_etm_decoder_params *d_params __maybe_unused,
		struct cs_etm_decoder *decoder __maybe_unused)
		{
		}
		#endif

		static int cs_etm_decoder__create_packet_printer(struct cs_etm_decoder *decoder,
		const char *decoder_name,
		void *trace_config)
		{
		u8 csid;

		if (ocsd_dt_create_decoder(decoder->dcd_tree, decoder_name,
		OCSD_CREATE_FLG_PACKET_PROC,
		trace_config, &csid))
		return -1;

		if (ocsd_dt_set_pkt_protocol_printer(decoder->dcd_tree, csid, 0))
		return -1;

		return 0;
		}

		static int
		cs_etm_decoder__create_etm_packet_printer(struct cs_etm_trace_params *t_params,
		struct cs_etm_decoder *decoder)
		{
		const char *decoder_name;
		ocsd_etmv4_cfg trace_config_etmv4;
		void *trace_config;

		switch (t_params->protocol) {
		case CS_ETM_PROTO_ETMV4i:
		cs_etm_decoder__gen_etmv4_config(t_params, &trace_config_etmv4);
		decoder_name = OCSD_BUILTIN_DCD_ETMV4I;
		trace_config = &trace_config_etmv4;
		break;
		default:
		return -1;
		}

		return cs_etm_decoder__create_packet_printer(decoder,
		decoder_name,
		trace_config);
		}

		static void cs_etm_decoder__clear_buffer(struct cs_etm_decoder *decoder)
		{
		int i;

		decoder->head = 0;
		decoder->tail = 0;
		decoder->packet_count = 0;
		for (i = 0; i < MAX_BUFFER; i++) {
		decoder->packet_buffer[i].start_addr = 0xdeadbeefdeadbeefUL;
		decoder->packet_buffer[i].end_addr = 0xdeadbeefdeadbeefUL;
		decoder->packet_buffer[i].exc = false;
		decoder->packet_buffer[i].exc_ret = false;
		decoder->packet_buffer[i].cpu = INT_MIN;
		}
		}

		static int
		cs_etm_decoder__create_etm_decoder(struct cs_etm_decoder_params *d_params,
		struct cs_etm_trace_params *t_params,
		struct cs_etm_decoder *decoder)
		{
		if (d_params->operation == CS_ETM_OPERATION_PRINT)
		return cs_etm_decoder__create_etm_packet_printer(t_params,
		decoder);
		return -1;
		}

		struct cs_etm_decoder *
		cs_etm_decoder__new(int num_cpu, struct cs_etm_decoder_params *d_params,
		struct cs_etm_trace_params t_params[])
		{
		struct cs_etm_decoder *decoder;
		ocsd_dcd_tree_src_t format;
		u32 flags;
		int i, ret;

		if ((!t_params) \|\| (!d_params))
		return NULL;

		decoder = zalloc(sizeof(*decoder));

		if (!decoder)
		return NULL;

		decoder->data = d_params->data;
		decoder->prev_return = OCSD_RESP_CONT;
		cs_etm_decoder__clear_buffer(decoder);
		format = (d_params->formatted ? OCSD_TRC_SRC_FRAME_FORMATTED :
		OCSD_TRC_SRC_SINGLE);
		flags = 0;
		flags \|= (d_params->fsyncs ? OCSD_DFRMTR_HAS_FSYNCS : 0);
		flags \|= (d_params->hsyncs ? OCSD_DFRMTR_HAS_HSYNCS : 0);
		flags \|= (d_params->frame_aligned ? OCSD_DFRMTR_FRAME_MEM_ALIGN : 0);

		/*
		* Drivers may add barrier frames when used with perf, set up to
		* handle this. Barriers const of FSYNC packet repeated 4 times.
		*/
		flags \|= OCSD_DFRMTR_RESET_ON_4X_FSYNC;

		/* Create decode tree for the data source */
		decoder->dcd_tree = ocsd_create_dcd_tree(format, flags);

		if (decoder->dcd_tree == 0)
		goto err_free_decoder;

		/* init library print logging support */
		ret = cs_etm_decoder__init_def_logger_printing(d_params, decoder);
		if (ret != 0)
		goto err_free_decoder_tree;

		/* init raw frame logging if required */
		cs_etm_decoder__init_raw_frame_logging(d_params, decoder);

		for (i = 0; i < num_cpu; i++) {
		ret = cs_etm_decoder__create_etm_decoder(d_params,
		&t_params[i],
		decoder);
		if (ret != 0)
		goto err_free_decoder_tree;
		}

		return decoder;

		err_free_decoder_tree:
		ocsd_destroy_dcd_tree(decoder->dcd_tree);
		err_free_decoder:
		free(decoder);
		return NULL;
		}

		int cs_etm_decoder__process_data_block(struct cs_etm_decoder *decoder,
		u64 indx, const u8 *buf,
		size_t len, size_t *consumed)
		{
		int ret = 0;
		ocsd_datapath_resp_t cur = OCSD_RESP_CONT;
		ocsd_datapath_resp_t prev_return = decoder->prev_return;
		size_t processed = 0;
		u32 count;

		while (processed < len) {
		if (OCSD_DATA_RESP_IS_WAIT(prev_return)) {
		cur = ocsd_dt_process_data(decoder->dcd_tree,
		OCSD_OP_FLUSH,
		0,
		0,
		NULL,
		NULL);
		} else if (OCSD_DATA_RESP_IS_CONT(prev_return)) {
		cur = ocsd_dt_process_data(decoder->dcd_tree,
		OCSD_OP_DATA,
		indx + processed,
		len - processed,
		&buf[processed],
		&count);
		processed += count;
		} else {
		ret = -EINVAL;
		break;
		}

		/*
		* Return to the input code if the packet buffer is full.
		* Flushing will get done once the packet buffer has been
		* processed.
		*/
		if (OCSD_DATA_RESP_IS_WAIT(cur))
		break;

		prev_return = cur;
		}

		decoder->prev_return = cur;
		*consumed = processed;

		return ret;
		}

		void cs_etm_decoder__free(struct cs_etm_decoder *decoder)
		{
		if (!decoder)
		return;

		ocsd_destroy_dcd_tree(decoder->dcd_tree);
		decoder->dcd_tree = NULL;
		free(decoder);
		}

tools/perf/util/cs-etm-decoder/cs-etm-decoder.h

0 → 100644

+96 −0

Original line number	Diff line number	Diff line
		/*
		* SPDX-License-Identifier: GPL-2.0
		*
		* Copyright(C) 2015-2018 Linaro Limited.
		*
		* Author: Tor Jeremiassen <tor@ti.com>
		* Author: Mathieu Poirier <mathieu.poirier@linaro.org>
		*/

		#ifndef INCLUDE__CS_ETM_DECODER_H__
		#define INCLUDE__CS_ETM_DECODER_H__

		#include <linux/types.h>
		#include <stdio.h>

		struct cs_etm_decoder;

		struct cs_etm_buffer {
		const unsigned char *buf;
		size_t len;
		u64 offset;
		u64 ref_timestamp;
		};

		enum cs_etm_sample_type {
		CS_ETM_RANGE = 1 << 0,
		};

		struct cs_etm_packet {
		enum cs_etm_sample_type sample_type;
		u64 start_addr;
		u64 end_addr;
		u8 exc;
		u8 exc_ret;
		int cpu;
		};

		struct cs_etm_queue;

		typedef u32 (cs_etm_mem_cb_type)(struct cs_etm_queue , u64,
		size_t, u8 *);

		struct cs_etmv4_trace_params {
		u32 reg_idr0;
		u32 reg_idr1;
		u32 reg_idr2;
		u32 reg_idr8;
		u32 reg_configr;
		u32 reg_traceidr;
		};

		struct cs_etm_trace_params {
		int protocol;
		union {
		struct cs_etmv4_trace_params etmv4;
		};
		};

		struct cs_etm_decoder_params {
		int operation;
		void (packet_printer)(const char msg);
		cs_etm_mem_cb_type mem_acc_cb;
		u8 formatted;
		u8 fsyncs;
		u8 hsyncs;
		u8 frame_aligned;
		void *data;
		};

		/*
		* The following enums are indexed starting with 1 to align with the
		* open source coresight trace decoder library.
		*/
		enum {
		CS_ETM_PROTO_ETMV3 = 1,
		CS_ETM_PROTO_ETMV4i,
		CS_ETM_PROTO_ETMV4d,
		};

		enum {
		CS_ETM_OPERATION_PRINT = 1,
		CS_ETM_OPERATION_DECODE,
		};

		int cs_etm_decoder__process_data_block(struct cs_etm_decoder *decoder,
		u64 indx, const u8 *buf,
		size_t len, size_t *consumed);

		struct cs_etm_decoder *
		cs_etm_decoder__new(int num_cpu,
		struct cs_etm_decoder_params *d_params,
		struct cs_etm_trace_params t_params[]);

		void cs_etm_decoder__free(struct cs_etm_decoder *decoder);

		#endif /* INCLUDE__CS_ETM_DECODER_H__ */

tools/perf/util/cs-etm.c

+104 −4

Original line number	Diff line number	Diff line
		@@ -18,6 +18,7 @@
		#include "auxtrace.h"
		#include "color.h"
		#include "cs-etm.h"
		#include "cs-etm-decoder/cs-etm-decoder.h"
		#include "debug.h"
		#include "evlist.h"
		#include "intlist.h"
		@@ -69,6 +70,78 @@ struct cs_etm_queue {
		u64 offset;
		};

		static void cs_etm__packet_dump(const char *pkt_string)
		{
		const char *color = PERF_COLOR_BLUE;
		int len = strlen(pkt_string);

		if (len && (pkt_string[len-1] == '\n'))
		color_fprintf(stdout, color, " %s", pkt_string);
		else
		color_fprintf(stdout, color, " %s\n", pkt_string);

		fflush(stdout);
		}

		static void cs_etm__dump_event(struct cs_etm_auxtrace *etm,
		struct auxtrace_buffer *buffer)
		{
		int i, ret;
		const char *color = PERF_COLOR_BLUE;
		struct cs_etm_decoder_params d_params;
		struct cs_etm_trace_params *t_params;
		struct cs_etm_decoder *decoder;
		size_t buffer_used = 0;

		fprintf(stdout, "\n");
		color_fprintf(stdout, color,
		". ... CoreSight ETM Trace data: size %zu bytes\n",
		buffer->size);

		/* Use metadata to fill in trace parameters for trace decoder */
		t_params = zalloc(sizeof(t_params) etm->num_cpu);
		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_PRINT;
		d_params.formatted = true;
		d_params.fsyncs = false;
		d_params.hsyncs = false;
		d_params.frame_aligned = true;

		decoder = cs_etm_decoder__new(etm->num_cpu, &d_params, t_params);

		zfree(&t_params);

		if (!decoder)
		return;
		do {
		size_t consumed;

		ret = cs_etm_decoder__process_data_block(
		decoder, buffer->offset,
		&((u8 *)buffer->data)[buffer_used],
		buffer->size - buffer_used, &consumed);
		if (ret)
		break;

		buffer_used += consumed;
		} while (buffer_used < buffer->size);

		cs_etm_decoder__free(decoder);
		}

		static int cs_etm__flush_events(struct perf_session *session,
		struct perf_tool *tool)
		{
		@@ -137,11 +210,38 @@ static int cs_etm__process_event(struct perf_session *session,

		static int cs_etm__process_auxtrace_event(struct perf_session *session,
		union perf_event *event,
		struct perf_tool *tool)
		struct perf_tool *tool __maybe_unused)
		{
		(void) session;
		(void) event;
		(void) tool;
		struct cs_etm_auxtrace *etm = container_of(session->auxtrace,
		struct cs_etm_auxtrace,
		auxtrace);
		if (!etm->data_queued) {
		struct auxtrace_buffer *buffer;
		off_t data_offset;
		int fd = perf_data__fd(session->data);
		bool is_pipe = perf_data__is_pipe(session->data);
		int err;

		if (is_pipe)
		data_offset = 0;
		else {
		data_offset = lseek(fd, 0, SEEK_CUR);
		if (data_offset == -1)
		return -errno;
		}

		err = auxtrace_queues__add_event(&etm->queues, session,
		event, data_offset, &buffer);
		if (err)
		return err;

		if (dump_trace)
		if (auxtrace_buffer__get_data(buffer, fd)) {
		cs_etm__dump_event(etm, buffer);
		auxtrace_buffer__put_data(buffer);
		}
		}

		return 0;
		}

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