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Postgres FD Implementation
Commit 303b7fcd authored by Bruce Momjian's avatar Bruce Momjian
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Modify pg_test_fsync to match the behavior of git head in regards to 

O_DIRECT behavior.
parent 5ca543fb
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Showing with 27 additions and 81 deletions
contrib/pg_test_fsync/pg_test_fsync.c
View file @ 303b7fcd
......@@ -23,7 +23,7 @@
#define XLOG_BLCKSZ_K (XLOG_BLCKSZ / 1024)
#define LABEL_FORMAT " %-32s"
#define NA_FORMAT LABEL_FORMAT "%18s"
#define NA_FORMAT "%18s"
#define OPS_FORMAT "%9.3f ops/sec"
static const char *progname;
......@@ -134,6 +134,11 @@ handle_args(int argc, char *argv[])
}
printf("%d operations per test\n", ops_per_test);
#if PG_O_DIRECT != 0
printf("O_DIRECT supported on this platform for open_datasync and open_sync.\n");
#else
printf("Direct I/O is not supported on this platform.\n");
#endif
}
static void
......@@ -184,43 +189,19 @@ test_sync(int writes_per_op)
/*
* Test open_datasync if available
*/
#ifdef OPEN_DATASYNC_FLAG
printf(LABEL_FORMAT, "open_datasync"
#if PG_O_DIRECT != 0
" (non-direct I/O)*"
#endif
);
printf(LABEL_FORMAT, "open_datasync");
fflush(stdout);
if ((tmpfile = open(filename, O_RDWR | O_DSYNC, 0)) == -1)
die("could not open output file");
gettimeofday(&start_t, NULL);
for (ops = 0; ops < ops_per_test; ops++)
{
for (writes = 0; writes < writes_per_op; writes++)
if (write(tmpfile, buf, XLOG_BLCKSZ) != XLOG_BLCKSZ)
die("write failed");
if (lseek(tmpfile, 0, SEEK_SET) == -1)
die("seek failed");
}
gettimeofday(&stop_t, NULL);
close(tmpfile);
print_elapse(start_t, stop_t);
/*
* If O_DIRECT is enabled, test that with open_datasync
*/
#if PG_O_DIRECT != 0
#ifdef OPEN_DATASYNC_FLAG
if ((tmpfile = open(filename, O_RDWR | O_DSYNC | PG_O_DIRECT, 0)) == -1)
{
printf(NA_FORMAT, "o_direct", "n/a**\n");
printf(NA_FORMAT, "n/a*\n");
fs_warning = true;
}
else
{
printf(LABEL_FORMAT, "open_datasync (direct I/O)");
fflush(stdout);
if ((tmpfile = open(filename, O_RDWR | O_DSYNC | PG_O_DIRECT, 0)) == -1)
die("could not open output file");
gettimeofday(&start_t, NULL);
for (ops = 0; ops < ops_per_test; ops++)
{
......@@ -234,19 +215,17 @@ test_sync(int writes_per_op)
close(tmpfile);
print_elapse(start_t, stop_t);
}
#endif
#else
printf(NA_FORMAT, "open_datasync", "n/a\n");
printf(NA_FORMAT, "n/a\n");
#endif
/*
* Test fdatasync if available
*/
#ifdef HAVE_FDATASYNC
printf(LABEL_FORMAT, "fdatasync");
fflush(stdout);
#ifdef HAVE_FDATASYNC
if ((tmpfile = open(filename, O_RDWR, 0)) == -1)
die("could not open output file");
gettimeofday(&start_t, NULL);
......@@ -263,7 +242,7 @@ test_sync(int writes_per_op)
close(tmpfile);
print_elapse(start_t, stop_t);
#else
printf(NA_FORMAT, "fdatasync", "n/a\n");
printf(NA_FORMAT, "n/a\n");
#endif
/*
......@@ -292,10 +271,10 @@ test_sync(int writes_per_op)
/*
* If fsync_writethrough is available, test as well
*/
#ifdef HAVE_FSYNC_WRITETHROUGH
printf(LABEL_FORMAT, "fsync_writethrough");
fflush(stdout);
#ifdef HAVE_FSYNC_WRITETHROUGH
if ((tmpfile = open(filename, O_RDWR, 0)) == -1)
die("could not open output file");
gettimeofday(&start_t, NULL);
......@@ -313,49 +292,23 @@ test_sync(int writes_per_op)
close(tmpfile);
print_elapse(start_t, stop_t);
#else
printf(NA_FORMAT, "fsync_writethrough", "n/a\n");
printf(NA_FORMAT, "n/a\n");
#endif
/*
* Test open_sync if available
*/
#ifdef OPEN_SYNC_FLAG
printf(LABEL_FORMAT, "open_sync"
#if PG_O_DIRECT != 0
" (non-direct I/O)*"
#endif
);
printf(LABEL_FORMAT, "open_sync");
fflush(stdout);
if ((tmpfile = open(filename, O_RDWR | OPEN_SYNC_FLAG, 0)) == -1)
die("could not open output file");
gettimeofday(&start_t, NULL);
for (ops = 0; ops < ops_per_test; ops++)
{
for (writes = 0; writes < writes_per_op; writes++)
if (write(tmpfile, buf, XLOG_BLCKSZ) != XLOG_BLCKSZ)
die("write failed");
if (lseek(tmpfile, 0, SEEK_SET) == -1)
die("seek failed");
}
gettimeofday(&stop_t, NULL);
close(tmpfile);
print_elapse(start_t, stop_t);
/*
* If O_DIRECT is enabled, test that with open_sync
*/
#if PG_O_DIRECT != 0
#ifdef OPEN_SYNC_FLAG
if ((tmpfile = open(filename, O_RDWR | OPEN_SYNC_FLAG | PG_O_DIRECT, 0)) == -1)
{
printf(NA_FORMAT, "o_direct", "n/a**\n");
printf(NA_FORMAT, "n/a*\n");
fs_warning = true;
}
else
{
printf(LABEL_FORMAT, "open_sync (direct I/O)");
fflush(stdout);
gettimeofday(&start_t, NULL);
for (ops = 0; ops < ops_per_test; ops++)
{
......@@ -369,20 +322,13 @@ test_sync(int writes_per_op)
close(tmpfile);
print_elapse(start_t, stop_t);
}
#endif
#else
printf(NA_FORMAT, "open_sync", "n/a\n");
#endif
#if defined(OPEN_DATASYNC_FLAG) || defined(OPEN_SYNC_FLAG)
if (PG_O_DIRECT != 0)
printf("* This non-direct I/O mode is not used by Postgres.\n");
printf(NA_FORMAT, "n/a\n");
#endif
if (fs_warning)
{
printf("** This file system and its mount options do not support direct\n");
printf("* This file system and its mount options do not support direct\n");
printf("I/O, e.g. ext4 in journaled mode.\n");
}
}
......@@ -407,16 +353,16 @@ test_open_syncs(void)
static void
test_open_sync(const char *msg, int writes_size)
{
#ifdef OPEN_SYNC_FLAG
int tmpfile, ops, writes;
if ((tmpfile = open(filename, O_RDWR | OPEN_SYNC_FLAG | PG_O_DIRECT, 0)) == -1)
printf(NA_FORMAT, "o_direct", "n/a**\n");
else
{
printf(LABEL_FORMAT, msg);
fflush(stdout);
#ifdef OPEN_SYNC_FLAG
if ((tmpfile = open(filename, O_RDWR | OPEN_SYNC_FLAG | PG_O_DIRECT, 0)) == -1)
printf(NA_FORMAT, "n/a*\n");
else
{
gettimeofday(&start_t, NULL);
for (ops = 0; ops < ops_per_test; ops++)
{
......@@ -433,7 +379,7 @@ test_open_sync(const char *msg, int writes_size)
}
#else
printf(NA_FORMAT, "open_sync", "n/a\n");
printf(NA_FORMAT, "n/a\n");
#endif
}
......
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