mirrors/postgres
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Report test_fynsc times in tests per second, instead of total seconds.

Browse Source
This commit is contained in:
Bruce Momjian 2010-07-04 01:50:29 +00:00
parent a520b78f3e
commit 7341a8cab2
1 changed files with 32 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

55
src/tools/fsync/test_fsync.c
View File

@ -1,5 +1,5 @@
/*
* $PostgreSQL: pgsql/src/tools/fsync/test_fsync.c,v 1.27 2010/02/26 02:01:39 momjian Exp $
* $PostgreSQL: pgsql/src/tools/fsync/test_fsync.c,v 1.28 2010/07/04 01:50:29 momjian Exp $
*
*
* test_fsync.c
@ -34,6 +34,8 @@
#define LABEL_FORMAT "\t%-30s"
int loops = 10000;
void die(char *str);
void print_elapse(struct timeval start_t, struct timeval stop_t);
@ -43,8 +45,7 @@ main(int argc, char *argv[])
struct timeval start_t;
struct timeval stop_t;
int tmpfile,
i,
loops = 5000;
i;
char *full_buf = (char *) malloc(XLOG_SEG_SIZE),
*buf;
char *filename = FSYNC_FILENAME;
@ -73,10 +74,12 @@ main(int argc, char *argv[])
buf = (char *) TYPEALIGN(ALIGNOF_XLOG_BUFFER, full_buf);
printf("Loops = %d\n\n", loops);
/*
* Simple write
*/
printf("Simple 8k write timing:\n");
printf("Simple write timing:\n");
/* write only */
gettimeofday(&start_t, NULL);
for (i = 0; i < loops; i++)
@ -88,13 +91,13 @@ main(int argc, char *argv[])
close(tmpfile);
}
gettimeofday(&stop_t, NULL);
printf(LABEL_FORMAT, "write");
printf(LABEL_FORMAT, "8k write");
print_elapse(start_t, stop_t);
/*
* Compare file sync methods with one 8k write
*/
printf("\nCompare file sync methods using one 8k write:\n");
printf("\nCompare file sync methods using one write:\n");
#ifdef OPEN_DATASYNC_FLAG
/* open_dsync, write */
@ -110,7 +113,7 @@ main(int argc, char *argv[])
}
gettimeofday(&stop_t, NULL);
close(tmpfile);
printf(LABEL_FORMAT, "open_datasync write");
printf(LABEL_FORMAT, "open_datasync 8k write");
print_elapse(start_t, stop_t);
#else
printf("\t(open_datasync unavailable)\n");
@ -130,7 +133,7 @@ main(int argc, char *argv[])
}
gettimeofday(&stop_t, NULL);
close(tmpfile);
printf(LABEL_FORMAT, "open_sync write");
printf(LABEL_FORMAT, "open_sync 8k write");
print_elapse(start_t, stop_t);
#else
printf("\t(open_sync unavailable)\n");
@ -151,7 +154,7 @@ main(int argc, char *argv[])
}
gettimeofday(&stop_t, NULL);
close(tmpfile);
printf(LABEL_FORMAT, "write, fdatasync");
printf(LABEL_FORMAT, "8k write, fdatasync");
print_elapse(start_t, stop_t);
#else
printf("\t(fdatasync unavailable)\n");
@ -172,13 +175,13 @@ main(int argc, char *argv[])
}
gettimeofday(&stop_t, NULL);
close(tmpfile);
printf(LABEL_FORMAT, "write, fsync");
printf(LABEL_FORMAT, "8k write, fsync");
print_elapse(start_t, stop_t);
/*
* Compare file sync methods with two 8k write
*/
printf("\nCompare file sync methods using two 8k writes:\n");
printf("\nCompare file sync methods using two writes:\n");
#ifdef OPEN_DATASYNC_FLAG
/* open_dsync, write */
@ -196,7 +199,7 @@ main(int argc, char *argv[])
}
gettimeofday(&stop_t, NULL);
close(tmpfile);
printf(LABEL_FORMAT, "open_datasync write, write");
printf(LABEL_FORMAT, "2 open_datasync 8k writes");
print_elapse(start_t, stop_t);
#else
printf("\t(open_datasync unavailable)\n");
@ -218,7 +221,7 @@ main(int argc, char *argv[])
}
gettimeofday(&stop_t, NULL);
close(tmpfile);
printf(LABEL_FORMAT, "open_sync write, write");
printf(LABEL_FORMAT, "2 open_sync 8k writes");
print_elapse(start_t, stop_t);
#endif
@ -239,7 +242,7 @@ main(int argc, char *argv[])
}
gettimeofday(&stop_t, NULL);
close(tmpfile);
printf(LABEL_FORMAT, "write, write, fdatasync");
printf(LABEL_FORMAT, "8k write, 8k write, fdatasync");
print_elapse(start_t, stop_t);
#else
printf("\t(fdatasync unavailable)\n");
@ -262,7 +265,7 @@ main(int argc, char *argv[])
}
gettimeofday(&stop_t, NULL);
close(tmpfile);
printf(LABEL_FORMAT, "write, write, fsync");
printf(LABEL_FORMAT, "8k write, 8k write, fsync");
print_elapse(start_t, stop_t);
/*
@ -284,7 +287,7 @@ main(int argc, char *argv[])
}
gettimeofday(&stop_t, NULL);
close(tmpfile);
printf(LABEL_FORMAT, "16k open_sync write");
printf(LABEL_FORMAT, "open_sync 16k write");
print_elapse(start_t, stop_t);
/* Two 8k open_sync writes */
@ -302,7 +305,7 @@ main(int argc, char *argv[])
}
gettimeofday(&stop_t, NULL);
close(tmpfile);
printf(LABEL_FORMAT, "2 8k open_sync writes");
printf(LABEL_FORMAT, "2 open_sync 8k writes");
print_elapse(start_t, stop_t);
#else
printf("\t(open_sync unavailable)\n");
@ -311,8 +314,9 @@ main(int argc, char *argv[])
/*
* Fsync another file descriptor?
*/
printf("\nCompare fsync times on write() and new file descriptors (if the times\n");
printf("are similar, fsync() can sync data written on a different descriptor):\n");
printf("\nTest if fsync on non-write file descriptor is honored:\n");
printf("(If the times are similar, fsync() can sync data written\n");
printf("on a different descriptor.)\n");
/* write, fsync, close */
gettimeofday(&start_t, NULL);
@ -331,7 +335,7 @@ main(int argc, char *argv[])
close(tmpfile);
}
gettimeofday(&stop_t, NULL);
printf(LABEL_FORMAT, "write, fsync, close");
printf(LABEL_FORMAT, "8k write, fsync, close");
print_elapse(start_t, stop_t);
/* write, close, fsync */
@ -351,7 +355,7 @@ main(int argc, char *argv[])
close(tmpfile);
}
gettimeofday(&stop_t, NULL);
printf(LABEL_FORMAT, "write, close, fsync");
printf(LABEL_FORMAT, "8k write, close, fsync");
print_elapse(start_t, stop_t);
/* cleanup */
@ -364,14 +368,19 @@ main(int argc, char *argv[])
void
print_elapse(struct timeval start_t, struct timeval stop_t)
{
double total_time, per_second;
if (stop_t.tv_usec < start_t.tv_usec)
{
stop_t.tv_sec--;
stop_t.tv_usec += 1000000;
}
printf("%3ld.%06ld\n", (long) (stop_t.tv_sec - start_t.tv_sec),
(long) (stop_t.tv_usec - start_t.tv_usec));
total_time = (stop_t.tv_sec - start_t.tv_sec) +
(stop_t.tv_usec - start_t.tv_usec) * 0.000001;
per_second = loops / total_time;
printf("%9.3f/second\n", per_second);
}
void