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diff --git a/tools/test/perform/chunk_cache.c b/tools/test/perform/chunk_cache.c
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+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group. *
+ * Copyright by the Board of Trustees of the University of Illinois. *
+ * All rights reserved. *
+ * *
+ * This file is part of HDF5. The full HDF5 copyright notice, including *
+ * terms governing use, modification, and redistribution, is contained in *
+ * the COPYING file, which can be found at the root of the source code *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases. *
+ * If you do not have access to either file, you may request a copy from *
+ * help@hdfgroup.org. *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*
+ * Purpose: check the performance of chunk cache in these two cases (HDFFV-10601):
+ * 1. partial chunks exist along any dimension.
+ * 2. number of slots in chunk cache is smaller than the number of chunks
+ * in the fastest-growing dimension.
+ */
+#include "hdf5.h"
+#include "H5private.h"
+
+#define FILENAME "chunk_cache_perf.h5"
+
+#define RANK 2
+
+#define DSET1_NAME "partial_chunks"
+#define DSET1_DIM1 9 * 1000
+#define DSET1_DIM2 9
+#define CHUNK1_DIM1 2 * 1000
+#define CHUNK1_DIM2 2
+
+#define DSET2_NAME "hash_value"
+#define DSET2_DIM1 300
+#define DSET2_DIM2 600
+#define CHUNK2_DIM1 100
+#define CHUNK2_DIM2 100
+
+#define RDCC_NSLOTS 5
+#define RDCC_NBYTES 1024 * 1024 * 10
+#define RDCC_W0 0.75F
+
+#define FILTER_COUNTER 306
+static size_t nbytes_global;
+
+typedef struct test_time_t {
+ long tv_sec;
+ long tv_usec;
+} test_time_t;
+
+/* Local function prototypes for the dummy filter */
+static size_t
+counter (unsigned flags, size_t cd_nelmts,
+ const unsigned *cd_values, size_t nbytes,
+ size_t *buf_size, void **buf);
+
+/* This message derives from H5Z */
+const H5Z_class2_t H5Z_COUNTER[1] = {{
+ H5Z_CLASS_T_VERS, /* H5Z_class_t version */
+ FILTER_COUNTER, /* Filter id number */
+ 1, 1, /* Encoding and decoding enabled */
+ "counter", /* Filter name for debugging */
+ NULL, /* The "can apply" callback */
+ NULL, /* The "set local" callback */
+ counter, /* The actual filter function */
+}};
+
+/*-------------------------------------------------------------------------
+ * Count number of bytes but don't do anything else. Keep
+ * track of the data of chunks being read from file into memory.
+ */
+static size_t
+counter (unsigned flags, size_t cd_nelmts,
+ const unsigned *cd_values, size_t nbytes,
+ size_t *buf_size, void **buf)
+{
+ nbytes_global += nbytes;
+ return nbytes;
+}
+
+/*---------------------------------------------------------------------------*/
+double retrieve_time(void)
+{
+#ifdef H5_HAVE_GETTIMEOFDAY
+ struct timeval t;
+ HDgettimeofday(&t, NULL);
+ return ((double)t.tv_sec + (double)t.tv_usec / 1000000);
+#else
+ return 0.0;
+#endif
+}
+
+/*---------------------------------------------------------------------------*/
+static void
+cleanup (void)
+{
+ if (!getenv ("HDF5_NOCLEANUP")) {
+ remove (FILENAME);
+ }
+}
+
+/*-------------------------------------------------------------------------------
+ * Create a chunked dataset with partial chunks along either dimensions:
+ * dataset dimension: 9000 x 9
+ * chunk dimension: 2000 x 2
+ */
+static int create_dset1(hid_t file)
+{
+ hid_t dataspace, dataset;
+ hid_t dcpl;
+ hsize_t dims[RANK] = {DSET1_DIM1, DSET1_DIM2};
+ hsize_t chunk_dims[RANK] = {CHUNK1_DIM1, CHUNK1_DIM2};
+ int data[DSET1_DIM1][DSET1_DIM2]; /* data for writing */
+ int i, j;
+
+ /* Create the data space. */
+ if((dataspace = H5Screate_simple (RANK, dims, NULL)) < 0)
+ goto error;
+
+ /* Modify dataset creation properties, i.e. enable chunking */
+ if((dcpl = H5Pcreate (H5P_DATASET_CREATE)) < 0)
+ goto error;
+ if(H5Pset_chunk (dcpl, RANK, chunk_dims) < 0)
+ goto error;
+
+ /* Set the dummy filter simply for counting the number of bytes being read into the memory */
+ if(H5Zregister(H5Z_COUNTER) < 0)
+ goto error;
+
+ if(H5Pset_filter(dcpl, FILTER_COUNTER, 0, 0, NULL) < 0)
+ goto error;
+
+ /* Create a new dataset within the file using chunk creation properties. */
+ if((dataset = H5Dcreate2 (file, DSET1_NAME, H5T_NATIVE_INT, dataspace,
+ H5P_DEFAULT, dcpl, H5P_DEFAULT)) < 0)
+ goto error;
+
+ for (i = 0; i < DSET1_DIM1; i++)
+ for (j = 0; j < DSET1_DIM2; j++)
+ data[i][j] = i+j;
+
+ /* Write data to dataset */
+ if(H5Dwrite (dataset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL,
+ H5P_DEFAULT, data) < 0)
+ goto error;
+
+ /* Close resources */
+ H5Dclose (dataset);
+ H5Pclose (dcpl);
+ H5Sclose (dataspace);
+ return 0;
+
+error:
+ H5E_BEGIN_TRY {
+ H5Dclose (dataset);
+ H5Pclose (dcpl);
+ H5Sclose (dataspace);
+ } H5E_END_TRY;
+
+ return 1;
+}
+
+/*---------------------------------------------------------------------------
+ * Create a chunked dataset for testing hash values:
+ * dataset dimensions: 300 x 600
+ * chunk dimensions: 100 x 100
+ */
+static int create_dset2(hid_t file)
+{
+ hid_t dataspace, dataset;
+ hid_t dcpl;
+ hsize_t dims[RANK] = {DSET2_DIM1, DSET2_DIM2};
+ hsize_t chunk_dims[RANK] = {CHUNK2_DIM1, CHUNK2_DIM2};
+ int data[DSET2_DIM1][DSET2_DIM2]; /* data for writing */
+ int i, j;
+
+ /* Create the data space. */
+ if((dataspace = H5Screate_simple (RANK, dims, NULL)) < 0)
+ goto error;
+
+ /* Modify dataset creation properties, i.e. enable chunking */
+ if((dcpl = H5Pcreate (H5P_DATASET_CREATE)) < 0)
+ goto error;
+ if(H5Pset_chunk (dcpl, RANK, chunk_dims) < 0)
+ goto error;
+
+ /* Set the dummy filter simply for counting the number of bytes being read into the memory */
+ if(H5Zregister(H5Z_COUNTER) < 0)
+ goto error;
+ if(H5Pset_filter(dcpl, FILTER_COUNTER, 0, 0, NULL) < 0)
+ goto error;
+
+ /* Create a new dataset within the file using chunk creation properties. */
+ if((dataset = H5Dcreate2 (file, DSET2_NAME, H5T_NATIVE_INT, dataspace,
+ H5P_DEFAULT, dcpl, H5P_DEFAULT)) < 0)
+ goto error;
+
+ for (i = 0; i < DSET2_DIM1; i++)
+ for (j = 0; j < DSET2_DIM2; j++)
+ data[i][j] = i+j;
+
+ /* Write data to dataset */
+ if(H5Dwrite (dataset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL,
+ H5P_DEFAULT, data) < 0)
+ goto error;
+
+ /* Close resources */
+ H5Dclose (dataset);
+ H5Pclose (dcpl);
+ H5Sclose (dataspace);
+
+ return 0;
+
+error:
+ H5E_BEGIN_TRY {
+ H5Dclose (dataset);
+ H5Pclose (dcpl);
+ H5Sclose (dataspace);
+ } H5E_END_TRY;
+
+ return 1;
+}
+/*---------------------------------------------------------------------------
+ * Check the performance of the chunk cache when partial chunks exist
+ * along the dataset dimensions.
+ */
+static int check_partial_chunks_perf(hid_t file)
+{
+ hid_t dataset;
+ hid_t filespace;
+ hid_t memspace;
+ hid_t dapl;
+
+ int rdata[DSET1_DIM2]; /* data for reading */
+ int i;
+
+ hsize_t row_rank = 1;
+ hsize_t row_dim[1] = {DSET1_DIM2};
+ hsize_t start[RANK] = {0, 0};
+ hsize_t count[RANK] = {1, DSET1_DIM2};
+ double start_t, end_t;
+
+ if((dapl = H5Pcreate(H5P_DATASET_ACCESS)) < 0)
+ goto error;
+ if(H5Pset_chunk_cache (dapl, RDCC_NSLOTS, RDCC_NBYTES, RDCC_W0) < 0)
+ goto error;
+
+ dataset = H5Dopen2 (file, DSET1_NAME, dapl);
+
+ memspace = H5Screate_simple(row_rank, row_dim, NULL);
+ filespace = H5Dget_space(dataset);
+
+ nbytes_global = 0;
+
+ start_t = retrieve_time();
+
+ /* Read the data row by row */
+ for(i = 0; i < DSET1_DIM1; i++) {
+ start[0] = i;
+ if(H5Sselect_hyperslab(filespace, H5S_SELECT_SET,
+ start, NULL, count, NULL) < 0)
+ goto error;
+
+ if(H5Dread (dataset, H5T_NATIVE_INT, memspace, filespace,
+ H5P_DEFAULT, rdata) < 0)
+ goto error;
+ }
+
+ end_t = retrieve_time();
+
+#ifdef H5_HAVE_GETTIMEOFDAY
+ printf("1. Partial chunks: total read time is %lf; number of bytes being read from file is %lu\n", (end_t -start_t), nbytes_global);
+#else
+ printf("1. Partial chunks: no total read time because gettimeofday() is not available; number of bytes being read from file is %lu\n", nbytes_global);
+#endif
+
+ H5Dclose (dataset);
+ H5Sclose (filespace);
+ H5Sclose (memspace);
+ H5Pclose (dapl);
+
+ return 0;
+error:
+ H5E_BEGIN_TRY {
+ H5Dclose (dataset);
+ H5Sclose (filespace);
+ H5Sclose (memspace);
+ H5Pclose (dapl);
+ } H5E_END_TRY;
+ return 1;
+}
+
+/*---------------------------------------------------------------------------
+ * Check the performance of chunk cache when the number of cache slots
+ * is smaller than the number of chunks along the fastest-growing
+ * dimension of the dataset.
+ */
+static int check_hash_value_perf(hid_t file)
+{
+ hid_t dataset;
+ hid_t filespace;
+ hid_t memspace;
+ hid_t dapl;
+
+ int rdata[DSET2_DIM1]; /* data for reading */
+ int i;
+
+ hsize_t column_rank = 1;
+ hsize_t column_dim[1] = {DSET2_DIM1};
+ hsize_t start[RANK] = {0, 0};
+ hsize_t count[RANK] = {DSET2_DIM1, 1};
+ double start_t, end_t;
+
+ if((dapl = H5Pcreate(H5P_DATASET_ACCESS)) < 0)
+ goto error;
+ if(H5Pset_chunk_cache (dapl, RDCC_NSLOTS, RDCC_NBYTES, RDCC_W0) < 0)
+ goto error;
+
+ if((dataset = H5Dopen2 (file, DSET2_NAME, dapl)) < 0)
+ goto error;
+ if((memspace = H5Screate_simple(column_rank, column_dim, NULL)) < 0)
+ goto error;
+ if((filespace = H5Dget_space(dataset)) < 0)
+ goto error;
+
+ nbytes_global = 0;
+
+ start_t = retrieve_time();
+
+ /* Read the data column by column */
+ for(i = 0; i < DSET2_DIM2; i++) {
+ start[1] = i;
+ if(H5Sselect_hyperslab(filespace, H5S_SELECT_SET,
+ start, NULL, count, NULL) < 0)
+ goto error;
+
+ if(H5Dread (dataset, H5T_NATIVE_INT, memspace, filespace,
+ H5P_DEFAULT, rdata) < 0)
+ goto error;
+ }
+
+ end_t = retrieve_time();
+
+#ifdef H5_HAVE_GETTIMEOFDAY
+ printf("2. Hash value: total read time is %lf; number of bytes being read from file is %lu\n", (end_t -start_t), nbytes_global);
+#else
+ printf("2. Hash value: no total read time because gettimeofday() is not available; number of bytes being read from file is %lu\n", nbytes_global);
+#endif
+
+ H5Dclose (dataset);
+ H5Sclose (filespace);
+ H5Sclose (memspace);
+ H5Pclose (dapl);
+ return 0;
+
+error:
+ H5E_BEGIN_TRY {
+ H5Dclose (dataset);
+ H5Sclose (filespace);
+ H5Sclose (memspace);
+ H5Pclose (dapl);
+ } H5E_END_TRY;
+ return 1;
+}
+
+/*-------------------------------------------------------------------------------------
+ * Purpose: check the performance of chunk cache in these two cases (HDFFV-10601):
+ * 1. partial chunks exist along any dimension.
+ * 2. number of slots in chunk cache is smaller than the number of chunks
+ * in the fastest-growing dimension.
+ *-------------------------------------------------------------------------------------*/
+int
+main (void)
+{
+ hid_t file; /* handles */
+ int nerrors = 0;
+
+ /* Create a new file. If file exists its contents will be overwritten. */
+ if((file = H5Fcreate (FILENAME, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT)) < 0)
+ goto error;
+
+ nerrors += create_dset1(file);
+ nerrors += create_dset2(file);
+
+ if(H5Fclose (file) < 0)
+ goto error;
+
+ /* Re-open the file for testing performance. */
+ if((file = H5Fopen (FILENAME, H5F_ACC_RDONLY, H5P_DEFAULT)) < 0)
+ goto error;
+
+ nerrors += check_partial_chunks_perf(file);
+ nerrors += check_hash_value_perf(file);
+
+ if(H5Fclose (file) < 0)
+ goto error;
+
+ if (nerrors>0) goto error;
+ cleanup();
+ return 0;
+
+error:
+ fprintf(stderr, "*** ERRORS DETECTED ***\n");
+ return 1;
+}
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