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261 linhas
7.9 KiB
261 linhas
7.9 KiB
/*
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* test-trans.c - Checks the correctness and performance of all of the
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* student's transpose functions and records the results for their
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* official submitted version as well.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <assert.h>
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#include <unistd.h>
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#include <string.h>
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#include <signal.h>
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#include <getopt.h>
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#include <sys/types.h>
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#include "cachelab.h"
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#include <sys/wait.h> // fir WEXITSTATUS
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#include <limits.h> // for INT_MAX
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/* Maximum array dimension */
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#define MAXN 256
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/* The description string for the transpose_submit() function that the
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student submits for credit */
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#define SUBMIT_DESCRIPTION "Transpose submission"
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/* External function defined in trans.c */
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extern void registerFunctions();
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/* External variables defined in cachelab-tools.c */
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extern trans_func_t func_list[MAX_TRANS_FUNCS];
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extern int func_counter;
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/* Globals set on the command line */
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static int M = 0;
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static int N = 0;
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/* The correctness and performance for the submitted transpose function */
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struct results {
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int funcid;
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int correct;
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int misses;
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};
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static struct results results = {-1, 0, INT_MAX};
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/*
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* eval_perf - Evaluate the performance of the registered transpose functions
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*/
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void eval_perf(unsigned int s, unsigned int E, unsigned int b)
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{
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int i,flag;
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unsigned int len, hits, misses, evictions;
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unsigned long long int marker_start, marker_end, addr;
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char buf[1000], cmd[255];
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char filename[128];
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registerFunctions();
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/* Open the complete trace file */
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FILE* full_trace_fp;
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FILE* part_trace_fp;
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/* Evaluate the performance of each registered transpose function */
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for (i=0; i<func_counter; i++) {
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if (strcmp(func_list[i].description, SUBMIT_DESCRIPTION) == 0 )
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results.funcid = i; /* remember which function is the submission */
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printf("\nFunction %d (%d total)\nStep 1: Validating and generating memory traces\n",i,func_counter);
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/* Use valgrind to generate the trace */
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sprintf(cmd, "valgrind --tool=lackey --trace-mem=yes --log-fd=1 -v ./tracegen -M %d -N %d -F %d > trace.tmp", M, N,i);
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flag=WEXITSTATUS(system(cmd));
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if (0!=flag) {
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printf("Validation error at function %d! Run ./tracegen -M %d -N %d -F %d for details.\nSkipping performance evaluation for this function.\n",flag-1,M,N,i);
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continue;
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}
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/* Get the start and end marker addresses */
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FILE* marker_fp = fopen(".marker", "r");
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assert(marker_fp);
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fscanf(marker_fp, "%llx %llx", &marker_start, &marker_end);
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fclose(marker_fp);
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func_list[i].correct=1;
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/* Save the correctness of the transpose submission */
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if (results.funcid == i ) {
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results.correct = 1;
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}
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full_trace_fp = fopen("trace.tmp", "r");
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assert(full_trace_fp);
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/* Filtered trace for each transpose function goes in a separate file */
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sprintf(filename, "trace.f%d", i);
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part_trace_fp = fopen(filename, "w");
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assert(part_trace_fp);
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/* Locate trace corresponding to the trans function */
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flag = 0;
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while (fgets(buf, 1000, full_trace_fp) != NULL) {
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/* We are only interested in memory access instructions */
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if (buf[0]==' ' && buf[2]==' ' &&
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(buf[1]=='S' || buf[1]=='M' || buf[1]=='L' )) {
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sscanf(buf+3, "%llx,%u", &addr, &len);
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/* If start marker found, set flag */
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if (addr == marker_start)
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flag = 1;
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/* Valgrind creates many spurious accesses to the
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stack that have nothing to do with the students
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code. At the moment, we are ignoring all stack
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accesses by using the simple filter of recording
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accesses to only the low 32-bit portion of the
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address space. At some point it would be nice to
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try to do more informed filtering so that would
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eliminate the valgrind stack references while
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include the student stack references. */
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if (flag && addr < 0xffffffff) {
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fputs(buf, part_trace_fp);
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}
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/* if end marker found, close trace file */
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if (addr == marker_end) {
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flag = 0;
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fclose(part_trace_fp);
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break;
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}
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}
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}
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fclose(full_trace_fp);
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/* Run the reference simulator */
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printf("Step 2: Evaluating performance (s=%d, E=%d, b=%d)\n", s, E, b);
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char cmd[255];
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sprintf(cmd, "./csim-ref -s %u -E %u -b %u -t trace.f%d > /dev/null",
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s, E, b, i);
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system(cmd);
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/* Collect results from the reference simulator */
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FILE* in_fp = fopen(".csim_results","r");
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assert(in_fp);
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fscanf(in_fp, "%u %u %u", &hits, &misses, &evictions);
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fclose(in_fp);
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func_list[i].num_hits = hits;
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func_list[i].num_misses = misses;
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func_list[i].num_evictions = evictions;
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printf("func %u (%s): hits:%u, misses:%u, evictions:%u\n",
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i, func_list[i].description, hits, misses, evictions);
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/* If it is transpose_submit(), record number of misses */
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if (results.funcid == i) {
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results.misses = misses;
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}
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}
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}
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/*
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* usage - Print usage info
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*/
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void usage(char *argv[]){
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printf("Usage: %s [-h] -M <rows> -N <cols>\n", argv[0]);
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printf("Options:\n");
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printf(" -h Print this help message.\n");
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printf(" -M <rows> Number of matrix rows (max %d)\n", MAXN);
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printf(" -N <cols> Number of matrix columns (max %d)\n", MAXN);
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printf("Example: %s -M 8 -N 8\n", argv[0]);
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}
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/*
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* sigsegv_handler - SIGSEGV handler
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*/
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void sigsegv_handler(int signum){
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printf("Error: Segmentation Fault.\n");
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printf("TEST_TRANS_RESULTS=0:0\n");
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fflush(stdout);
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exit(1);
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}
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/*
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* sigalrm_handler - SIGALRM handler
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*/
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void sigalrm_handler(int signum){
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printf("Error: Program timed out.\n");
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printf("TEST_TRANS_RESULTS=0:0\n");
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fflush(stdout);
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exit(1);
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}
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/*
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* main - Main routine
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*/
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int main(int argc, char* argv[])
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{
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char c;
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while ((c = getopt(argc,argv,"M:N:h")) != -1) {
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switch(c) {
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case 'M':
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M = atoi(optarg);
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break;
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case 'N':
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N = atoi(optarg);
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break;
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case 'h':
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usage(argv);
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exit(0);
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default:
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usage(argv);
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exit(1);
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}
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}
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if (M == 0 || N == 0) {
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printf("Error: Missing required argument\n");
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usage(argv);
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exit(1);
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}
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if (M > MAXN || N > MAXN) {
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printf("Error: M or N exceeds %d\n", MAXN);
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usage(argv);
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exit(1);
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}
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/* Install SIGSEGV and SIGALRM handlers */
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if (signal(SIGSEGV, sigsegv_handler) == SIG_ERR) {
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fprintf(stderr, "Unable to install SIGALRM handler\n");
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exit(1);
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}
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if (signal(SIGALRM, sigalrm_handler) == SIG_ERR) {
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fprintf(stderr, "Unable to install SIGALRM handler\n");
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exit(1);
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}
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/* Time out and give up after a while */
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alarm(120);
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/* Check the performance of the student's transpose function */
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eval_perf(5, 1, 5);
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/* Emit the results for this particular test */
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if (results.funcid == -1) {
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printf("\nError: We could not find your transpose_submit() function\n");
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printf("Error: Please ensure that description field is exactly \"%s\"\n",
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SUBMIT_DESCRIPTION);
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printf("\nTEST_TRANS_RESULTS=0:0\n");
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}
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else {
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printf("\nSummary for official submission (func %d): correctness=%d misses=%d\n",
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results.funcid, results.correct, results.misses);
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printf("\nTEST_TRANS_RESULTS=%d:%d\n", results.correct, results.misses);
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}
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return 0;
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}
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