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522 lines
14 KiB
C
522 lines
14 KiB
C
/*
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* Copyright (C) 1998 NCSA
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* All rights reserved.
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*
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* Programmer: Robb Matzke <robb@arborea.spizella.com>
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* Thursday, May 14, 1998
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*
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* Purpose: Checks the effect of various I/O request sizes and raw data
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* cache sizes. Performance depends on the amount of data read
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* from disk and we use a filter to get that number.
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*/
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/* See H5private.h for how to include headers */
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#undef NDEBUG
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#include <hdf5.h>
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#ifdef H5_STDC_HEADERS
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# include <assert.h>
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# include <stdio.h>
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# include <stdlib.h>
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# include <string.h>
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#endif
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#ifndef HAVE_ATTRIBUTE
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# undef __attribute__
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# define __attribute__(X) /*void*/
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# define UNUSED /*void*/
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#else
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# define UNUSED __attribute__((unused))
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#endif
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#define FILE_NAME "chunk.h5"
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#define LINESPOINTS "lines"
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#define CH_SIZE 100 /*squared in terms of bytes */
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#define DS_SIZE 20 /*squared in terms of chunks */
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#define FILTER_COUNTER 305
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#define READ 0
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#define WRITE 1
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#define MIN(X,Y) ((X)<(Y)?(X):(Y))
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#define MAX(X,Y) ((X)>(Y)?(X):(Y))
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#define SQUARE(X) ((X)*(X))
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/* The row-major test */
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#define RM_CACHE_STRT 25
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#define RM_CACHE_END 25
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#define RM_CACHE_DELT 5
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#define RM_START 0.50
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#define RM_END 5.00
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#define RM_DELTA 0.50
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#define RM_W0 0.0
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#define RM_NRDCC 521
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/* Diagonal test */
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#define DIAG_CACHE_STRT 25
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#define DIAG_CACHE_END 25
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#define DIAG_CACHE_DELT 5
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#define DIAG_START 0.50
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#define DIAG_END 5.00
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#define DIAG_DELTA 0.50
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/* #define DIAG_W0 0.65 */
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/* #define DIAG_NRDCC 521 */
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static size_t nio_g;
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static hid_t fapl_g = -1;
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/*-------------------------------------------------------------------------
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* Function: counter
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*
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* Purpose: Count number of bytes but don't do anything.
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*
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* Return: Success: src_nbytes-1
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*
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* Failure: never fails
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*
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* Programmer: Robb Matzke
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* Thursday, May 14, 1998
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*
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* Modifications:
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*
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*-------------------------------------------------------------------------
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*/
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static size_t
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counter (unsigned UNUSED flags, size_t UNUSED cd_nelmts,
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const unsigned UNUSED *cd_values, size_t nbytes,
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size_t UNUSED *buf_size, void UNUSED **buf)
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{
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nio_g += nbytes;
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return nbytes;
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}
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/*-------------------------------------------------------------------------
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* Function: create_dataset
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*
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* Purpose: Creates a square dataset with square chunks, registers a
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* stupid compress/uncompress pair for counting I/O, and
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* initializes the dataset. The chunk size is in bytes, the
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* dataset size is in terms of chunks.
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*
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* Return: void
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*
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* Programmer: Robb Matzke
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* Thursday, May 14, 1998
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*
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* Modifications:
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*
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*-------------------------------------------------------------------------
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*/
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static void
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create_dataset (void)
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{
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hid_t file, space, dcpl, dset;
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hsize_t size[2];
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signed char *buf;
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/* The file */
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file = H5Fcreate (FILE_NAME, H5F_ACC_TRUNC, H5P_DEFAULT, fapl_g);
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/* The data space */
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size[0] = size[1] = DS_SIZE * CH_SIZE;
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space = H5Screate_simple (2, size, size);
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/* The storage layout and compression */
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dcpl = H5Pcreate (H5P_DATASET_CREATE);
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size[0] = size[1] = CH_SIZE;
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H5Pset_chunk (dcpl, 2, size);
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H5Zregister (FILTER_COUNTER, "counter", counter);
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H5Pset_filter (dcpl, FILTER_COUNTER, 0, 0, NULL);
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/* The dataset */
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dset = H5Dcreate (file, "dset", H5T_NATIVE_SCHAR, space, dcpl);
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assert (dset>=0);
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/* The data */
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buf = calloc (1, SQUARE (DS_SIZE*CH_SIZE));
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H5Dwrite (dset, H5T_NATIVE_SCHAR, H5S_ALL, H5S_ALL, H5P_DEFAULT, buf);
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free (buf);
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/* Close */
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H5Dclose (dset);
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H5Sclose (space);
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H5Pclose (dcpl);
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H5Fclose (file);
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}
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/*-------------------------------------------------------------------------
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* Function: test_rowmaj
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*
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* Purpose: Reads the entire dataset using the specified size-squared
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* I/O requests in row major order.
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*
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* Return: Efficiency: data requested divided by data actually read.
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*
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* Programmer: Robb Matzke
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* Thursday, May 14, 1998
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*
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* Modifications:
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*
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*-------------------------------------------------------------------------
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*/
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static double
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test_rowmaj (int op, hsize_t cache_size, hsize_t io_size)
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{
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hid_t file, dset, mem_space, file_space;
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signed char *buf = calloc (1, SQUARE(io_size));
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hsize_t i, j, hs_size[2];
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hssize_t hs_offset[2];
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int mdc_nelmts, rdcc_nelmts;
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double w0;
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H5Pget_cache (fapl_g, &mdc_nelmts, &rdcc_nelmts, NULL, &w0);
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#ifdef RM_W0
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w0 = RM_W0;
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#endif
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#ifdef RM_NRDCC
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rdcc_nelmts = RM_NRDCC;
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#endif
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H5Pset_cache (fapl_g, mdc_nelmts, rdcc_nelmts,
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cache_size*SQUARE (CH_SIZE), w0);
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file = H5Fopen (FILE_NAME, H5F_ACC_RDWR, fapl_g);
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dset = H5Dopen (file, "dset");
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file_space = H5Dget_space (dset);
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nio_g = 0;
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for (i=0; i<CH_SIZE*DS_SIZE; i+=io_size) {
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#if 0
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fprintf (stderr, "%5d\b\b\b\b\b", (int)i);
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fflush (stderr);
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#endif
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for (j=0; j<CH_SIZE*DS_SIZE; j+=io_size) {
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hs_offset[0] = i;
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hs_size[0] = MIN (io_size, CH_SIZE*DS_SIZE-i);
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hs_offset[1] = j;
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hs_size[1] = MIN (io_size, CH_SIZE*DS_SIZE-j);
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mem_space = H5Screate_simple (2, hs_size, hs_size);
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H5Sselect_hyperslab (file_space, H5S_SELECT_SET, hs_offset,
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NULL, hs_size, NULL);
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if (READ==op) {
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H5Dread (dset, H5T_NATIVE_SCHAR, mem_space, file_space,
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H5P_DEFAULT, buf);
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} else {
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H5Dwrite (dset, H5T_NATIVE_SCHAR, mem_space, file_space,
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H5P_DEFAULT, buf);
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}
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H5Sclose (mem_space);
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}
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}
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free (buf);
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H5Sclose (file_space);
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H5Dclose (dset);
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H5Fclose (file);
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return (double)SQUARE(CH_SIZE*DS_SIZE)/(double)nio_g;
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}
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/*-------------------------------------------------------------------------
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* Function: test_diag
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*
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* Purpose: Reads windows diagonally across the dataset. Each window is
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* offset from the previous window by OFFSET in the x and y
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* directions. The reading ends after the (k,k) value is read
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* where k is the maximum index in the dataset.
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*
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* Return: Efficiency.
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*
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* Programmer: Robb Matzke
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* Friday, May 15, 1998
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*
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* Modifications:
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*
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*-------------------------------------------------------------------------
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*/
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static double
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test_diag (int op, hsize_t cache_size, hsize_t io_size, hsize_t offset)
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{
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hid_t file, dset, mem_space, file_space;
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hsize_t i, hs_size[2];
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hsize_t nio = 0;
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hssize_t hs_offset[2];
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signed char *buf = calloc (1, SQUARE (io_size));
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int mdc_nelmts, rdcc_nelmts;
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double w0;
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H5Pget_cache (fapl_g, &mdc_nelmts, &rdcc_nelmts, NULL, &w0);
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#ifdef DIAG_W0
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w0 = DIAG_W0;
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#endif
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#ifdef DIAG_NRDCC
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rdcc_nelmts = DIAG_NRDCC;
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#endif
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H5Pset_cache (fapl_g, mdc_nelmts, rdcc_nelmts,
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cache_size*SQUARE (CH_SIZE), w0);
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file = H5Fopen (FILE_NAME, H5F_ACC_RDWR, fapl_g);
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dset = H5Dopen (file, "dset");
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file_space = H5Dget_space (dset);
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nio_g = 0;
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for (i=0, hs_size[0]=io_size; hs_size[0]==io_size; i+=offset) {
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hs_offset[0] = hs_offset[1] = i;
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hs_size[0] = hs_size[1] = MIN (io_size, CH_SIZE*DS_SIZE-i);
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mem_space = H5Screate_simple (2, hs_size, hs_size);
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H5Sselect_hyperslab (file_space, H5S_SELECT_SET, hs_offset, NULL,
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hs_size, NULL);
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if (READ==op) {
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H5Dread (dset, H5T_NATIVE_SCHAR, mem_space, file_space,
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H5P_DEFAULT, buf);
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} else {
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H5Dwrite (dset, H5T_NATIVE_SCHAR, mem_space, file_space,
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H5P_DEFAULT, buf);
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}
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H5Sclose (mem_space);
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nio += hs_size[0]*hs_size[1];
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if (i>0) nio -= SQUARE (io_size-offset);
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}
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free (buf);
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H5Sclose (file_space);
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H5Dclose (dset);
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H5Fclose (file);
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/*
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* The extra cast in the following statement is a bug workaround for the
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* Win32 version 5.0 compiler.
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* 1998-11-06 ptl
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*/
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return (double)(hssize_t)nio/(hssize_t)nio_g;
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}
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/*-------------------------------------------------------------------------
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* Function: main
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*
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* Purpose: See file prologue.
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*
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* Return: Success:
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*
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* Failure:
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*
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* Programmer: Robb Matzke
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* Thursday, May 14, 1998
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*
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* Modifications:
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*
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*-------------------------------------------------------------------------
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*/
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int
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main (void)
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{
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hsize_t io_size;
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double effic, io_percent;
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FILE *f, *d;
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int cache_size;
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double w0;
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/*
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* Create a global file access property list.
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*/
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fapl_g = H5Pcreate (H5P_FILE_ACCESS);
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H5Pget_cache (fapl_g, NULL, NULL, NULL, &w0);
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/* Create the file */
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create_dataset ();
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f = fopen ("x-gnuplot", "w");
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printf("Test %8s %8s %8s\n", "CacheSz", "ChunkSz", "Effic");
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printf("--------- -------- -------- --------\n");
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#if 1
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/*
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* Test row-major reading of the dataset with various sizes of request
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* windows.
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*/
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if (RM_CACHE_STRT==RM_CACHE_END) {
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fprintf (f, "set yrange [0:1.2]\n");
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fprintf (f, "set ytics 0, 0.1, 1\n");
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fprintf (f, "set xlabel \"%s\"\n",
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"Request size as a fraction of chunk size");
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fprintf (f, "set ylabel \"Efficiency\"\n");
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fprintf (f, "set title \"Cache %d chunks, w0=%g, "
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"Size=(total=%d, chunk=%d)\"\n",
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RM_CACHE_STRT, w0, DS_SIZE*CH_SIZE, CH_SIZE);
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} else {
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fprintf (f, "set autoscale\n");
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fprintf (f, "set hidden3d\n");
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}
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fprintf (f, "set terminal postscript\nset output \"x-rowmaj-rd.ps\"\n");
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fprintf (f, "%s \"x-rowmaj-rd.dat\" title \"RowMaj-Read\" with %s\n",
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RM_CACHE_STRT==RM_CACHE_END?"plot":"splot",
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LINESPOINTS);
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fprintf (f, "set terminal x11\nreplot\n");
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d = fopen ("x-rowmaj-rd.dat", "w");
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for (cache_size=RM_CACHE_STRT;
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cache_size<=RM_CACHE_END;
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cache_size+=RM_CACHE_DELT) {
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for (io_percent=RM_START; io_percent<=RM_END; io_percent+=RM_DELTA) {
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io_size = MAX (1, (int)(CH_SIZE*io_percent));
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printf ("Rowmaj-rd %8d %8.2f", cache_size, io_percent);
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fflush (stdout);
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effic = test_rowmaj (READ, cache_size, io_size);
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printf (" %8.2f\n", effic);
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if (RM_CACHE_STRT==RM_CACHE_END) {
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fprintf (d, "%g %g\n", io_percent, effic);
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} else {
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fprintf (d, "%g\n", effic);
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}
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}
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fprintf (d, "\n");
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}
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fclose (d);
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fprintf (f, "pause -1\n");
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#endif
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#if 1
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/*
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* Test row-major writing of the dataset with various sizes of request
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* windows.
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*/
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if (RM_CACHE_STRT==RM_CACHE_END) {
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fprintf (f, "set yrange [0:1.2]\n");
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fprintf (f, "set ytics 0, 0.1, 1\n");
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fprintf (f, "set xlabel \"%s\"\n",
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"Request size as a fraction of chunk size");
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fprintf (f, "set ylabel \"Efficiency\"\n");
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fprintf (f, "set title \"Cache %d chunks,w0=%g, "
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"Size=(total=%d, chunk=%d)\"\n",
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RM_CACHE_STRT, w0, DS_SIZE*CH_SIZE, CH_SIZE);
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} else {
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fprintf (f, "set autoscale\n");
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fprintf (f, "set hidden3d\n");
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}
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fprintf (f, "set terminal postscript\nset output \"x-rowmaj-wr.ps\"\n");
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fprintf (f, "%s \"x-rowmaj-wr.dat\" title \"RowMaj-Write\" with %s\n",
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RM_CACHE_STRT==RM_CACHE_END?"plot":"splot",
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LINESPOINTS);
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fprintf (f, "set terminal x11\nreplot\n");
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d = fopen ("x-rowmaj-wr.dat", "w");
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for (cache_size=RM_CACHE_STRT;
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cache_size<=RM_CACHE_END;
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cache_size+=RM_CACHE_DELT) {
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for (io_percent=RM_START; io_percent<=RM_END; io_percent+=RM_DELTA) {
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io_size = MAX (1, (int)(CH_SIZE*io_percent));
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printf ("Rowmaj-wr %8d %8.2f", cache_size, io_percent);
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fflush (stdout);
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effic = test_rowmaj (WRITE, cache_size, io_size);
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printf (" %8.2f\n", effic);
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if (RM_CACHE_STRT==RM_CACHE_END) {
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fprintf (d, "%g %g\n", io_percent, effic);
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} else {
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fprintf (d, "%g\n", effic);
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}
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}
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fprintf (d, "\n");
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}
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fclose (d);
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fprintf (f, "pause -1\n");
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#endif
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#if 1
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/*
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* Test diagonal read
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*/
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if (DIAG_CACHE_STRT==DIAG_CACHE_END) {
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fprintf (f, "set yrange [0:1.2]\n");
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fprintf (f, "set ytics 0, 0.1, 1\n");
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fprintf (f, "set xlabel \"%s\"\n",
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"Request size as a fraction of chunk size");
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fprintf (f, "set ylabel \"Efficiency\"\n");
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fprintf (f, "set title \"Cache %d chunks,w0=%g, "
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"Size=(total=%d, chunk=%d)\"\n",
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DIAG_CACHE_STRT, w0, DS_SIZE*CH_SIZE, CH_SIZE);
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} else {
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fprintf (f, "set autoscale\n");
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fprintf (f, "set hidden3d\n");
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}
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fprintf (f, "set terminal postscript\nset output \"x-diag-rd.ps\"\n");
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fprintf (f, "%s \"x-diag-rd.dat\" title \"Diag-Read\" with %s\n",
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DIAG_CACHE_STRT==DIAG_CACHE_END?"plot":"splot", LINESPOINTS);
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fprintf (f, "set terminal x11\nreplot\n");
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d = fopen ("x-diag-rd.dat", "w");
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for (cache_size=DIAG_CACHE_STRT;
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cache_size<=DIAG_CACHE_END;
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cache_size+=DIAG_CACHE_DELT) {
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for (io_percent=DIAG_START;
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io_percent<=DIAG_END;
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io_percent+=DIAG_DELTA) {
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io_size = MAX (1, (int)(CH_SIZE*io_percent));
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printf ("Diag-rd %8d %8.2f", cache_size, io_percent);
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fflush (stdout);
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effic = test_diag (READ, cache_size, io_size, MAX (1, io_size/2));
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printf (" %8.2f\n", effic);
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if (DIAG_CACHE_STRT==DIAG_CACHE_END) {
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fprintf (d, "%g %g\n", io_percent, effic);
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} else {
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fprintf (d, "%g\n", effic);
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}
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}
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fprintf (d, "\n");
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}
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fclose (d);
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fprintf (f, "pause -1\n");
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#endif
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#if 1
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/*
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* Test diagonal write
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*/
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if (DIAG_CACHE_STRT==DIAG_CACHE_END) {
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fprintf (f, "set yrange [0:1.2]\n");
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fprintf (f, "set ytics 0, 0.1, 1\n");
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fprintf (f, "set xlabel \"%s\"\n",
|
||
"Request size as a fraction of chunk size");
|
||
fprintf (f, "set ylabel \"Efficiency\"\n");
|
||
fprintf (f, "set title \"Cache %d chunks, w0=%g, "
|
||
"Size=(total=%d, chunk=%d)\"\n",
|
||
DIAG_CACHE_STRT, w0, DS_SIZE*CH_SIZE, CH_SIZE);
|
||
} else {
|
||
fprintf (f, "set autoscale\n");
|
||
fprintf (f, "set hidden3d\n");
|
||
}
|
||
fprintf (f, "set terminal postscript\nset output \"x-diag-wr.ps\"\n");
|
||
fprintf (f, "%s \"x-diag-wr.dat\" title \"Diag-Write\" with %s\n",
|
||
DIAG_CACHE_STRT==DIAG_CACHE_END?"plot":"splot", LINESPOINTS);
|
||
fprintf (f, "set terminal x11\nreplot\n");
|
||
d = fopen ("x-diag-wr.dat", "w");
|
||
for (cache_size=DIAG_CACHE_STRT;
|
||
cache_size<=DIAG_CACHE_END;
|
||
cache_size+=DIAG_CACHE_DELT) {
|
||
for (io_percent=DIAG_START;
|
||
io_percent<=DIAG_END;
|
||
io_percent+=DIAG_DELTA) {
|
||
io_size = MAX (1, (int)(CH_SIZE*io_percent));
|
||
printf ("Diag-wr %8d %8.2f", cache_size, io_percent);
|
||
fflush (stdout);
|
||
effic = test_diag (WRITE, cache_size, io_size, MAX (1, io_size/2));
|
||
printf (" %8.2f\n", effic);
|
||
if (DIAG_CACHE_STRT==DIAG_CACHE_END) {
|
||
fprintf (d, "%g %g\n", io_percent, effic);
|
||
} else {
|
||
fprintf (d, "%g\n", effic);
|
||
}
|
||
}
|
||
fprintf (d, "\n");
|
||
}
|
||
fclose (d);
|
||
fprintf (f, "pause -1\n");
|
||
#endif
|
||
|
||
|
||
H5Pclose (fapl_g);
|
||
fclose (f);
|
||
return 0;
|
||
}
|
||
|