[svn-r4346] Purpose:

    New feature
Description:
    Started this directory for performance measurement programs.
    The programs here got compiled but not automatically run (just
    like the examples direcotry.)
    The programs have existed but now gathered to this one directory.
    iopipe.c, chunk.c and overhead.c were from test.  perf.c and mpi-perf.c
    were from testpar.
Platforms tested:
    eirene (serial and parallel).
    overhead failed during run due to some property error.  This is probably
    due to the recent change of properties code.
    perf and mpi-perf do not compile correctly for Parallel mode.
    Checking them to make them available to others.

1 files changed, 357 insertions, 0 deletions

diff --git a/perform/mpi-perf.c b/perform/mpi-perf.c
new file mode 100644
index 0000000..09a134b
--- /dev/null
+++ b/perform/mpi-perf.c
@@ -0,0 +1,357 @@
+/*
+ * (C) 1995-2001 Clemson University and Argonne National Laboratory.
+ *
+ * See COPYING in top-level directory.
+ *
+ * This is contributed by Robert Ross to the HDF5 software.
+ * and was called mpi-io-test.c
+ */
+
+#ifdef H5_HAVE_PARALLEL
+/* mpi-perf.c
+ *
+ * This is derived from code given to me by Rajeev Thakur.  Dunno where
+ * it originated.
+ *
+ * It's purpose is to produce aggregate bandwidth numbers for varying
+ * block sizes, number of processors, an number of iterations.
+ *
+ * This is strictly an mpi program - it is used to test the MPI I/O
+ * functionality implemented by Romio.
+ *
+ * Compiling is usually easiest with something like:
+ * mpicc -Wall -Wstrict-prototypes mpi-io-test.c -o mpi-io-test
+ *
+ * NOTE: This code assumes that all command line arguments make it out to all
+ * the processes that make up the parallel job, which isn't always the case.
+ * So if it doesn't work on some platform, that might be why.
+ */
+/* Modifications:
+ *    Albert Cheng, Apr 30, 20001
+ *    Changed MPI_File_open to use MPI_COMM_WORLD (was MPI_COMM_SELF).
+ *    Albert Cheng, May 5, 20001
+ *    Changed MPI_File_seek then MPI_File_write or MPI_File_read to just
+ *    MPI_File_write_at and MPI_File_read_at.  Some compiler, e.g., IBM
+ *    mpcc_r does not support MPI_File_seek and MPI_File_read or MPI_File_write.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/time.h>
+#include <mpi.h>
+#ifndef MPI_FILE_NULL           /*MPIO may be defined in mpi.h already       */
+#   include <mpio.h>
+#endif
+
+
+
+/* DEFAULT VALUES FOR OPTIONS */
+int64_t opt_block     = 1048576*16;
+int     opt_iter      = 1;
+int     opt_stripe    = -1;
+int     opt_correct   = 0;
+int     amode         = O_RDWR | O_CREAT;
+char    opt_file[256] = "/foo/test.out\0";
+char    opt_pvfstab[256] = "notset\0";
+int     opt_pvfstab_set = 0;
+
+/* function prototypes */
+int parse_args(int argc, char **argv);
+double Wtime(void);
+
+extern int errno;
+extern int debug_on;
+
+/* globals needed for getopt */
+extern char *optarg;
+extern int optind, opterr;
+
+int main(int argc, char **argv)
+{
+	char *buf, *tmp, *buf2, *tmp2, *check;
+	int i, j, mynod=0, nprocs=1, err, my_correct = 1, correct, myerrno;
+	double stim, etim;
+	double write_tim = 0;
+	double read_tim = 0;
+	double read_bw, write_bw;
+	double max_read_tim, max_write_tim;
+	double min_read_tim, min_write_tim;
+	double ave_read_tim, ave_write_tim;
+	int64_t iter_jump = 0;
+	int64_t seek_position = 0;
+	MPI_File fh;
+	MPI_Status status;
+	int nchars;
+
+	/* startup MPI and determine the rank of this process */
+	MPI_Init(&argc,&argv);
+	MPI_Comm_size(MPI_COMM_WORLD, &nprocs);
+	MPI_Comm_rank(MPI_COMM_WORLD, &mynod);
+
+	/* parse the command line arguments */
+	parse_args(argc, argv);
+
+	if (mynod == 0) printf("# Using mpi-io calls.\n");
+
+	
+	/* kindof a weird hack- if the location of the pvfstab file was 
+	 * specified on the command line, then spit out this location into
+	 * the appropriate environment variable: */
+	
+#if H5_HAVE_SETENV
+/* no setenv or unsetenv */
+	if (opt_pvfstab_set) {
+		if((setenv("PVFSTAB_FILE", opt_pvfstab, 1)) < 0){
+			perror("setenv");
+			goto die_jar_jar_die;
+		}
+	}
+#endif
+	
+	/* this is how much of the file data is covered on each iteration of
+	 * the test.  used to help determine the seek offset on each
+	 * iteration */
+	iter_jump = nprocs * opt_block;
+		
+	/* setup a buffer of data to write */
+	if (!(tmp = (char *) malloc(opt_block + 256))) {
+		perror("malloc");
+		goto die_jar_jar_die;
+	}
+	buf = tmp + 128 - (((long)tmp) % 128);  /* align buffer */
+
+	if (opt_correct) {
+		/* do the same buffer setup for verifiable data */
+		if (!(tmp2 = (char *) malloc(opt_block + 256))) {
+			perror("malloc2");
+			goto die_jar_jar_die;
+		 }
+		buf2 = tmp + 128 - (((long)tmp) % 128);
+	}
+
+	/* open the file for writing */
+	err = MPI_File_open(MPI_COMM_WORLD, opt_file, 
+	MPI_MODE_CREATE | MPI_MODE_RDWR, MPI_INFO_NULL, &fh);
+	if (err < 0) {
+		fprintf(stderr, "node %d, open error: %s\n", mynod, strerror(errno));
+		goto die_jar_jar_die;
+	}
+
+	/* now repeat the write operations the number of times
+	 * specified on the command line */
+	for (j=0; j < opt_iter; j++) {
+
+		/* calculate the appropriate position depending on the iteration
+		 * and rank of the current process */
+		seek_position = (j*iter_jump)+(mynod*opt_block);
+
+		if (opt_correct) /* fill in buffer for iteration */ {
+			for (i=mynod+j, check=buf; i<opt_block; i++,check++) *check=(char)i;
+		}
+
+		/* discover the starting time of the operation */
+	   MPI_Barrier(MPI_COMM_WORLD);
+	   stim = MPI_Wtime();
+
+		/* write out the data */
+		nchars = opt_block/sizeof(char);
+		err = MPI_File_write_at(fh, seek_position, buf, nchars, MPI_CHAR, &status);
+		if(err){
+			fprintf(stderr, "node %d, write error: %s\n", mynod, 
+			strerror(errno));
+		}
+
+		/* discover the ending time of the operation */
+	   etim = MPI_Wtime();
+
+	   write_tim += (etim - stim);
+		
+		/* we are done with this "write" iteration */
+	}
+
+	err = MPI_File_close(&fh);
+	if(err){
+		fprintf(stderr, "node %d, close error after write\n", mynod);
+	}
+	 
+	/* wait for everyone to synchronize at this point */
+	MPI_Barrier(MPI_COMM_WORLD);
+
+	/* reopen the file to read the data back out */
+	err = MPI_File_open(MPI_COMM_WORLD, opt_file, 
+	MPI_MODE_CREATE | MPI_MODE_RDWR, MPI_INFO_NULL, &fh);
+	if (err < 0) {
+		fprintf(stderr, "node %d, open error: %s\n", mynod, strerror(errno));
+		goto die_jar_jar_die;
+	}
+
+
+	/* we are going to repeat the read operation the number of iterations
+	 * specified */
+	for (j=0; j < opt_iter; j++) {
+		/* calculate the appropriate spot give the current iteration and
+		 * rank within the MPI processes */
+		seek_position = (j*iter_jump)+(mynod*opt_block);
+
+		/* discover the start time */
+	   MPI_Barrier(MPI_COMM_WORLD);
+	   stim = MPI_Wtime();
+
+		/* read in the file data */
+		if (!opt_correct){
+			err = MPI_File_read_at(fh, seek_position, buf, nchars, MPI_CHAR, &status);
+		}
+		else{
+			err = MPI_File_read_at(fh, seek_position, buf2, nchars, MPI_CHAR, &status);
+		}
+		myerrno = errno;
+
+		/* discover the end time */
+	   etim = MPI_Wtime();
+	   read_tim += (etim - stim);
+
+	   if (err < 0) fprintf(stderr, "node %d, read error, loc = %Ld: %s\n",
+			mynod, mynod*opt_block, strerror(myerrno));
+
+		/* if the user wanted to check correctness, compare the write
+		 * buffer to the read buffer */
+		if (opt_correct && memcmp(buf, buf2, opt_block)) {
+			fprintf(stderr, "node %d, correctness test failed\n", mynod);
+			my_correct = 0;
+			MPI_Allreduce(&my_correct, &correct, 1, MPI_INT, MPI_MIN,
+				MPI_COMM_WORLD);
+		}
+
+		/* we are done with this read iteration */
+	}
+
+	/* close the file */
+	err = MPI_File_close(&fh);
+	if(err){
+		fprintf(stderr, "node %d, close error after write\n", mynod);
+	}
+
+	/* compute the read and write times */
+	MPI_Allreduce(&read_tim, &max_read_tim, 1, MPI_DOUBLE, MPI_MAX,
+		MPI_COMM_WORLD);
+	MPI_Allreduce(&read_tim, &min_read_tim, 1, MPI_DOUBLE, MPI_MIN,
+		MPI_COMM_WORLD);
+	MPI_Allreduce(&read_tim, &ave_read_tim, 1, MPI_DOUBLE, MPI_SUM,
+		MPI_COMM_WORLD);
+
+	/* calculate the average from the sum */
+	ave_read_tim = ave_read_tim / nprocs; 
+
+	MPI_Allreduce(&write_tim, &max_write_tim, 1, MPI_DOUBLE, MPI_MAX,
+		MPI_COMM_WORLD);
+	MPI_Allreduce(&write_tim, &min_write_tim, 1, MPI_DOUBLE, MPI_MIN,
+		MPI_COMM_WORLD);
+	MPI_Allreduce(&write_tim, &ave_write_tim, 1, MPI_DOUBLE, MPI_SUM,
+		MPI_COMM_WORLD);
+
+	/* calculate the average from the sum */
+	ave_write_tim = ave_write_tim / nprocs; 
+	
+	/* print out the results on one node */
+	if (mynod == 0) {
+	   read_bw = ((int64_t)(opt_block*nprocs*opt_iter))/(max_read_tim*1000000.0);
+	   write_bw = ((int64_t)(opt_block*nprocs*opt_iter))/(max_write_tim*1000000.0);
+		
+			printf("nr_procs = %d, nr_iter = %d, blk_sz = %ld\n", nprocs,
+		opt_iter, (long)opt_block);
+			
+			printf("# total_size = %ld\n", (long)(opt_block*nprocs*opt_iter));
+			
+			printf("# Write:  min_time = %f, max_time = %f, mean_time = %f\n", 
+				min_write_tim, max_write_tim, ave_write_tim);
+			printf("# Read:  min_time = %f, max_time = %f, mean_time = %f\n", 
+				min_read_tim, max_read_tim, ave_read_tim);
+		
+	   printf("Write bandwidth = %f Mbytes/sec\n", write_bw);
+	   printf("Read bandwidth = %f Mbytes/sec\n", read_bw);
+		
+		if (opt_correct) {
+			printf("Correctness test %s.\n", correct ? "passed" : "failed");
+		}
+	}
+
+
+die_jar_jar_die:	
+
+#if H5_HAVE_SETENV
+/* no setenv or unsetenv */
+	/* clear the environment variable if it was set earlier */
+	if	(opt_pvfstab_set){
+		unsetenv("PVFSTAB_FILE");
+	}
+#endif
+	
+	free(tmp);
+	if (opt_correct) free(tmp2);
+	MPI_Finalize();
+	return(0);
+}
+
+int parse_args(int argc, char **argv)
+{
+	int c;
+	
+	while ((c = getopt(argc, argv, "s:b:i:f:p:c")) != EOF) {
+		switch (c) {
+			case 's': /* stripe */
+				opt_stripe = atoi(optarg);
+				break;
+			case 'b': /* block size */
+				opt_block = atoi(optarg);
+				break;
+			case 'i': /* iterations */
+				opt_iter = atoi(optarg);
+				break;
+			case 'f': /* filename */
+				strncpy(opt_file, optarg, 255);
+				break;
+			case 'p': /* pvfstab file */
+				strncpy(opt_pvfstab, optarg, 255);
+				opt_pvfstab_set = 1;
+				break;
+			case 'c': /* correctness */
+				opt_correct = 1;
+				break;
+			case '?': /* unknown */
+			default:
+				break;
+		}
+	}
+	return(0);
+}
+
+/* Wtime() - returns current time in sec., in a double */
+double Wtime()
+{
+	struct timeval t;
+	
+	gettimeofday(&t, NULL);
+	return((double)t.tv_sec + (double)t.tv_usec / 1000000);
+}
+
+/*
+ * Local variables:
+ *  c-indent-level: 3
+ *  c-basic-offset: 3
+ *  tab-width: 3
+ * End:
+ */
+
+#else /* H5_HAVE_PARALLEL */
+/* dummy program since H5_HAVE_PARALLE is not configured in */
+int
+main()
+{
+printf("No parallel performance because parallel is not configured in\n");
+return(0);
+}
+#endif /* H5_HAVE_PARALLEL */