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#include <assert.h>
#include <err.h>
#include <errno.h>
#include <libgen.h> /* basename(3) */
#include <signal.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <time.h> /* struct timespec, nanosleep */
#include <unistd.h> /* getopt, PATH_MAX, ... */
#include "hdf5.h"
#include "nbcompat.h"
#define DATAROWS 1
#define DATACOLS 10
static const hsize_t dims[2] = {DATAROWS, DATACOLS};
static const hsize_t chunk_dims[2] = {1, 1};
static volatile sig_atomic_t unbroken = 1;
typedef struct {
uint64_t created, deleted;
} stats_pair_t;
typedef struct {
stats_pair_t datasets, groups;
uint64_t iterations;
} stats_t;
typedef struct {
hid_t dataset[4], dataspace, dapl, dcpl, file, group[2];
char output_file[PATH_MAX];
char progname[PATH_MAX];
struct timespec update_interval;
int verbose;
bool oneshot;
bool print_stats;
bool use_vfd_swmr;
uint64_t iterations_limit;
stats_t stats;
} state_t;
#define ALL_HID_INITIALIZER (state_t){ \
.dataspace = H5I_INVALID_HID \
, .file = H5I_INVALID_HID \
, .verbose = 0 \
, .oneshot = false \
, .use_vfd_swmr = true \
, .print_stats = false \
, .iterations_limit = UINT64_MAX \
, .output_file = "" \
, .update_interval = (struct timespec){ \
.tv_sec = 0 \
, .tv_nsec = 1000000000UL / 10 /* 1/10 second */} \
, .stats = {{0, 0}, {0, 0}}}
static void state_init(state_t *, int, char **);
static void
write_dataset(state_t *s, int didx)
{
const int ndatasets = __arraycount(s->dataset);
hid_t ds;
int32_t data[DATAROWS][DATACOLS];
herr_t status;
unsigned int i, j;
for (i = 0; i < __arraycount(data); i++) {
for (j = 0; j < __arraycount(data[i]); j++) {
int k = (didx + j + i) % __arraycount(data[i]);
data[i][j] = (0 <= k && k < 3) ? 1 : 0;
if (s->verbose > 1)
fprintf(stderr, " %" PRId32, data[i][j]);
}
if (s->verbose > 1)
fprintf(stderr, "\n");
}
ds = s->dataset[didx % ndatasets];
status = H5Dwrite(ds, H5T_NATIVE_INT32, H5S_ALL, H5S_ALL,
H5P_DEFAULT, data);
if (status < 0)
errx(EXIT_FAILURE, "H5Dwrite failed");
if (H5Dflush(ds) < 0)
errx(EXIT_FAILURE, "H5Dflush failed");
}
static void
usage(const char *progname)
{
fprintf(stderr, "usage: %s [-u milliseconds]\n"
"\n"
"-o: oneshot mode, perform one iteration, wait for a signal, "
"then quit.\n"
"-s: print statistics at end\n"
"-S: disable VFD SWMR mode\n"
"-u ms: milliseconds interval between updates to %s.h5\n"
"-v: verbose mode, mention creation/deletion; -vv: print data\n"
"\n",
progname, progname);
exit(EXIT_FAILURE);
}
static void
print_stats(stats_t *s)
{
printf("%10" PRIu64 " groups created\n", s->groups.created);
printf("%10" PRIu64 " groups deleted\n", s->groups.deleted);
printf("%10" PRIu64 " datasets created\n", s->datasets.created);
printf("%10" PRIu64 " datasets deleted\n", s->datasets.deleted);
printf("%10" PRIu64 " iterations\n", s->iterations);
}
static void
state_init(state_t *s, int argc, char **argv)
{
int ch, i, rc;
char tfile[PATH_MAX];
char *end;
unsigned long millis;
uintmax_t niters;
*s = ALL_HID_INITIALIZER;
strlcpy(tfile, argv[0], sizeof(tfile));
strlcpy(s->progname, basename(tfile), sizeof(s->progname));
while ((ch = getopt(argc, argv, "n:ou:sSv")) != -1) {
switch (ch) {
case 'n':
niters = strtoumax(optarg, &end, 0);
if (niters == UINTMAX_MAX && errno == ERANGE) {
err(EXIT_FAILURE, "option -%c argument \"%s\"",
ch, optarg);
} else if (*end != '\0') {
errx(EXIT_FAILURE,
"garbage after -%c argument \"%s\"", ch,
optarg);
}
s->iterations_limit = niters;
break;
case 'o':
s->oneshot = true;
break;
case 's':
s->print_stats = true;
break;
case 'S':
s->use_vfd_swmr = false;
break;
case 'u':
errno = 0;
millis = strtoul(optarg, &end, 0);
if (millis == ULONG_MAX && errno == ERANGE) {
err(EXIT_FAILURE, "option -%c argument \"%s\"",
ch, optarg);
} else if (*end != '\0') {
errx(EXIT_FAILURE,
"garbage after -%c argument \"%s\"", ch,
optarg);
}
s->update_interval.tv_sec = millis / 1000UL;
s->update_interval.tv_nsec = (millis * 1000000UL) % 1000000000UL;
warnx("%lu milliseconds between updates", millis);
break;
case 'v':
s->verbose++;
break;
case '?':
default:
usage(s->progname);
}
}
argc -= optind;
argv += optind;
for (i = 0; i < __arraycount(s->dataset); i++)
s->dataset[i] = H5I_INVALID_HID;
for (i = 0; i < __arraycount(s->group); i++)
s->group[i] = H5I_INVALID_HID;
rc = snprintf(s->output_file, sizeof(s->output_file), "%s.h5", s->progname);
if (rc == -1 || rc >= sizeof(s->output_file))
errx(EXIT_FAILURE, "output filename was truncated");
}
static void
delete_group(state_t *s, const int64_t gidx)
{
hid_t g;
const int ngroups = __arraycount(s->group);
char gname[32];
assert(0 <= gidx);
snprintf(gname, sizeof(gname), "/group-%" PRId64, gidx);
g = s->group[gidx % ngroups];
if (H5Ldelete(s->file, gname, H5P_DEFAULT) < 0) {
errx(EXIT_FAILURE, "%s: H5Ldelete(, \"%s\", ) failed",
__func__, gname);
}
if (H5Gclose(g) < 0)
errx(EXIT_FAILURE, "H5Gclose failed");
if (s->verbose > 0)
fprintf(stderr, "Deleted group %s\n", gname);
s->group[gidx % ngroups] = H5I_INVALID_HID;
s->stats.groups.deleted++;
}
static void
create_group(state_t *s, const int64_t gidx)
{
const int ngroups = __arraycount(s->group);
hid_t g;
char gname[32];
assert(0 <= gidx);
assert(s->group[gidx % ngroups] == H5I_INVALID_HID);
snprintf(gname, sizeof(gname), "/group-%" PRId64, gidx);
g = H5Gcreate(s->file, gname, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
if (g < 0)
errx(EXIT_FAILURE, "H5Gcreate failed");
if (s->verbose > 0)
fprintf(stderr, "Created group %s\n", gname);
s->group[gidx % ngroups] = g;
s->stats.groups.created++;
}
static void
delete_dataset(state_t *s, const int64_t didx)
{
const int ndatasets = __arraycount(s->dataset);
char dname[32];
const int64_t gidx = didx / 2;
assert(0 <= gidx && 0 <= didx);
snprintf(dname, sizeof(dname), "/group-%" PRId64 "/dataset-%" PRId64,
gidx, didx);
if (H5Ldelete(s->file, dname, H5P_DEFAULT) < 0) {
errx(EXIT_FAILURE, "%s: H5Ldelete(, \"%s\", ) failed",
__func__, dname);
}
if (s->verbose > 0)
fprintf(stderr, "Deleted dataset %s\n", dname);
#if 1
const hid_t ds = s->dataset[didx % ndatasets];
if (H5Dclose(ds) < 0)
errx(EXIT_FAILURE, "H5Dclose failed");
#endif
s->dataset[didx % ndatasets] = H5I_INVALID_HID;
s->stats.datasets.deleted++;
}
static void
create_dataset(state_t *s, const int64_t didx)
{
const int ndatasets = __arraycount(s->dataset);
char dname[32];
const int64_t gidx = didx / 2;
hid_t ds;
assert(0 <= gidx && 0 <= didx);
assert(s->dataset[didx % ndatasets] == H5I_INVALID_HID);
s->dataspace = H5Screate_simple(__arraycount(dims), dims, NULL);
if (s->dataspace < 0)
errx(EXIT_FAILURE, "H5Screate_simple failed");
snprintf(dname, sizeof(dname), "/group-%" PRId64 "/dataset-%" PRId64,
gidx, didx);
ds = H5Dcreate2(s->file, dname,
H5T_STD_I32BE, s->dataspace,
H5P_DEFAULT, s->dcpl, s->dapl);
if (H5Sclose(s->dataspace) < 0)
errx(EXIT_FAILURE, "H5Sclose failed");
s->dataspace = H5I_INVALID_HID;
if (ds < 0)
errx(EXIT_FAILURE, "H5Dcreate(, \"%s\", ) failed", dname);
if (s->verbose > 0)
fprintf(stderr, "Created dataset %s\n", dname);
s->dataset[didx % ndatasets] = ds;
s->stats.datasets.created++;
}
static void
create_and_write_dataset(state_t *s, const int64_t didx)
{
#if 0
const int64_t gidx = didx / 2;
const int ngroups = __arraycount(s->group);
const hid_t g = s->group[gidx % ngroups];
if (H5Odisable_mdc_flushes(g) < 0)
err(EXIT_FAILURE, "H5Odisable_mdc_flushes failed");
#endif
create_dataset(s, didx);
write_dataset(s, didx);
#if 0
if (H5Oenable_mdc_flushes(g) < 0)
err(EXIT_FAILURE, "H5Oenable_mdc_flushes failed");
#endif
}
static void
handle_signal(int signo)
{
char msg[] = "Handling signal\n";
write(STDERR_FILENO, msg, sizeof(msg) - 1);
unbroken = 0;
}
static void
disestablish_handler(const struct sigaction *osa)
{
if (sigaction(SIGINT, osa, NULL) == -1)
err(EXIT_FAILURE, "%s: sigaction", __func__);
}
static void
establish_handler(struct sigaction *osa)
{
struct sigaction sa;
memset(&sa, '\0', sizeof(sa));
sa.sa_handler = handle_signal;
sigemptyset(&sa.sa_mask);
if (sigaction(SIGINT, &sa, osa) == -1)
err(EXIT_FAILURE, "%s: sigaction", __func__);
}
int
main(int argc, char **argv)
{
hid_t fapl, fcpl;
struct sigaction osa;
state_t storage;
state_t *s = &storage;
int64_t i;
H5F_vfd_swmr_config_t config;
memset(&config, '\0', sizeof(config));
state_init(s, argc, argv);
fapl = H5Pcreate(H5P_FILE_ACCESS);
if (fapl < 0) {
errx(EXIT_FAILURE, "%s.%d H5Pcreate failed",
__func__, __LINE__);
}
fcpl = H5Pcreate(H5P_FILE_CREATE);
if (fcpl < 0) {
errx(EXIT_FAILURE, "%s.%d H5Pcreate failed",
__func__, __LINE__);
}
config.version = H5F__CURR_VFD_SWMR_CONFIG_VERSION;
config.tick_len = 4;
config.max_lag = 5;
#if 0 /* raw-data flushing is not implemented */
config.flush_raw_data = true;
#endif
config.writer = true;
config.md_pages_reserved = 128;
strlcpy(config.md_file_path, "./my_md_file",
sizeof(config.md_file_path));
/* Enable page buffering */
if (H5Pset_page_buffer_size(fapl, 4096, 100, 0) < 0)
errx(EXIT_FAILURE, "H5Pset_page_buffer_size failed");
/* Enable VFD SWMR configuration */
if (s->use_vfd_swmr && H5Pset_vfd_swmr_config(fapl, &config) < 0)
errx(EXIT_FAILURE, "H5Pset_vfd_swmr_config failed");
/* Set file space strategy to paged aggregation in fcpl.
* Page buffering *requires* this strategy.
*
* I set the free-space threshold to 1GB so that deleted
* datasets are not recycled.
*/
if (H5Pset_file_space_strategy(fcpl,
H5F_FSPACE_STRATEGY_PAGE, false, 1024 * 1024 * 1024) < 0)
errx(EXIT_FAILURE, "H5Pset_file_space_strategy failed");
s->file = H5Fcreate(s->output_file, H5F_ACC_TRUNC, fcpl, fapl);
H5Pclose(fapl);
if (s->file < 0)
errx(EXIT_FAILURE, "H5Fcreate failed");
if ((s->dcpl = H5Pcreate(H5P_DATASET_CREATE)) < 0) {
errx(EXIT_FAILURE, "%s.%d: H5Pcreate failed",
__func__, __LINE__);
}
if ((s->dapl = H5Pcreate(H5P_DATASET_ACCESS)) < 0) {
errx(EXIT_FAILURE, "%s.%d: H5Pcreate failed",
__func__, __LINE__);
}
if (H5Pset_chunk(s->dcpl, 2, chunk_dims) < 0)
errx(EXIT_FAILURE, "H5Pset_chunk failed");
if (H5Pset_chunk_cache(s->dapl, H5D_CHUNK_CACHE_NSLOTS_DEFAULT, 0,
H5D_CHUNK_CACHE_W0_DEFAULT) < 0)
errx(EXIT_FAILURE, "H5Pset_chunk_cache failed");
establish_handler(&osa);
for (i = 0; i < 4; i++) {
s->stats.iterations++;
if (i % 2 == 0)
create_group(s, i / 2);
create_and_write_dataset(s, i);
}
for (i = 5; unbroken; i += 2) {
delete_dataset(s, i - 5);
delete_dataset(s, i - 4);
delete_group(s, (i - 4) / 2);
create_group(s, i / 2);
create_and_write_dataset(s, i - 1);
create_and_write_dataset(s, i);
if (s->oneshot || ++s->stats.iterations >= s->iterations_limit)
break;
nanosleep(&s->update_interval, NULL);
}
if (s->oneshot) {
sigset_t mask;
sigemptyset(&mask);
H5Fvfd_swmr_end_tick(s->file);
(void)sigsuspend(&mask);
}
#if 0
fprintf(stderr, "Interrupted. Cleaning up.\n");
int j;
for (--i, j = 0; j < 4; j++, --i) {
if (i % 2 == 1) {
delete_dataset(s, i - 1);
delete_dataset(s, i);
delete_group(s, i / 2);
}
}
for (j = 0; j < 4; j++) {
assert(s->dataset[j] == H5I_INVALID_HID);
assert(s->group[j / 2] == H5I_INVALID_HID);
}
#endif
if (s->print_stats)
print_stats(&s->stats);
if (H5Fclose(s->file) < 0)
errx(EXIT_FAILURE, "H5Fclose failed");
if (H5Pclose(s->dapl) < 0)
errx(EXIT_FAILURE, "H5Pclose failed");
if (H5Pclose(s->dcpl) < 0)
errx(EXIT_FAILURE, "H5Pclose failed");
disestablish_handler(&osa);
return EXIT_SUCCESS;
}
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