run_trace.cpp

/* Copyright 2009, 2010 Brendan Tauras */

//my changzhang
/* run_trace.cpp is part of FlashSim. */

/* FlashSim is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * any later version. */

/* FlashSim is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details. */

/* You should have received a copy of the GNU General Public License
 * along with FlashSim.  If not, see <http://www.gnu.org/licenses/>. */

/****************************************************************************/

/* ASCII trace driver
 * Brendan Tauras 2009-05-21
 *
 * driver to run traces - just provide the ASCII trace file
 * not accurate, for test purposes only
 * goes through trace and treats read requests as writes to prepare the SSD
 * 	(requests will fail if there are multiple writes to same address)
 * then goes through the trace again as normal
 * 	(write requests may fail if they are attempts to overwrite) */

#include <stdio.h>
#include <stdlib.h>
#include "ssd.h"

using namespace ssd;

int main(int argc, char **argv){
	double arrive_time;
	ssd::uint diskno;
	ssd::ulong vaddr;
	ssd::uint size;
	ssd::uint op;
	char line[80];
	double read_time = 0;
	double write_time = 0;
	double read_total = 0;
	double write_total = 0;
	unsigned long num_reads = 0;
	unsigned long num_writes = 0;

	load_config();
	print_config(NULL);
	printf("Press ENTER to continue...");
	getchar();
	printf("\n");

	Ssd ssd;

	FILE *trace = NULL;
	if((trace = fopen(argv[1], "r")) == NULL){
		printf("Please provide trace file name\n");
		exit(-1);
	}

	printf("INITIALIZING SSD\n");

	/* first go through and write to all read addresses to prepare the SSD */
	while(fgets(line, 80, trace) != NULL){
		sscanf(line, "%lf %u %lu %u %u", &arrive_time, &diskno, &vaddr, &size, &op);
		vaddr %= 65536;
		if(op == 1)
			(void) ssd.event_arrive(WRITE, vaddr, size, arrive_time);
	}

	printf("STARTING TRACE\n");

	/* now rewind file and run trace */
	fseek(trace, 0, SEEK_SET);
	while(fgets(line, 80, trace) != NULL){
		sscanf(line, "%lf %u %lu %u %u", &arrive_time, &diskno, &vaddr, &size, &op);
		vaddr %= 65536;
		if(op == 0){
			write_time = ssd.event_arrive(WRITE, vaddr, size, arrive_time);
			if(write_time != 0){
				write_total += write_time;
				num_writes++;
			}
		} else if(op == 1){
			read_time = ssd.event_arrive(READ, vaddr, size, arrive_time);
			if(read_time != 0){
				read_total += read_time;
				num_reads++;
			}
		} else
			fprintf(stderr, "Bad operation in trace\n");
	}
	printf("Num reads : %lu\n", num_reads);
	printf("Num writes: %lu\n", num_reads);
	printf("Avg read time : %.20lf\n", read_time / num_reads);
	printf("Avg write time: %.20lf\n", write_time / num_writes);
	return 0;
}