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Commit b2906c5

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bmomjianbmomjian
committed
Add fsync tests:
 Compare fsync before and after write's close: Compare one o_sync write to two: Compare file sync methods with one 8k write: Compare file sync methods with 2 8k writes:
1 parent 5ddecd1 commit b2906c5

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1 file changed

+144
-49
lines changed

1 file changed

+144
-49
lines changed

‎src/tools/fsync/test_fsync.c

+144-49
Original file line numberDiff line numberDiff line change
@@ -6,6 +6,7 @@
66
#include "../../include/pg_config.h"
77

88
#include <sys/types.h>
9+
#include <sys/stat.h>
910
#include <fcntl.h>
1011
#include <stdio.h>
1112
#include <stdlib.h>
@@ -26,124 +27,217 @@
2627
#endif
2728
#endif
2829

29-
void die(char *str);
30-
void print_elapse(struct timeval start_t, struct timeval elapse_t);
30+
void die(char *str);
31+
void print_elapse(struct timeval start_t, struct timeval elapse_t);
3132

32-
int main(int argc, char *argv[])
33+
int
34+
main(int argc, char *argv[])
3335
{
3436
struct timeval start_t;
3537
struct timeval elapse_t;
36-
int tmpfile;
37-
char *strout = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
38+
int tmpfile,
39+
i;
40+
char *strout = (char *) malloc(65536);
41+
42+
for (i = 0; i < 65536; i++)
43+
strout[i] = 'a';
44+
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_CREAT, S_IRUSR | S_IWUSR)) == -1)
45+
die("can't open /var/tmp/test_fsync.out");
46+
write(tmpfile, strout, 65536);
47+
fsync(tmpfile); /* fsync so later fsync's don't have to do
48+
* it */
49+
close(tmpfile);
3850

3951
printf("Simple write timing:\n");
40-
/* write only */
52+
/* write only */
4153
gettimeofday(&start_t, NULL);
42-
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_CREAT, 0600)) == -1)
54+
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR)) == -1)
4355
die("can't open /var/tmp/test_fsync.out");
44-
write(tmpfile, &strout, 200);
45-
close(tmpfile);
56+
write(tmpfile, strout, 8192);
57+
close(tmpfile);
4658
gettimeofday(&elapse_t, NULL);
47-
unlink("/var/tmp/test_fsync.out");
48-
printf("write ");
59+
printf("\twrite ");
4960
print_elapse(start_t, elapse_t);
5061
printf("\n\n");
5162

5263
printf("Compare fsync before and after write's close:\n");
64+
5365
/* write, fsync, close */
5466
gettimeofday(&start_t, NULL);
55-
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_CREAT, 0600)) == -1)
67+
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR)) == -1)
5668
die("can't open /var/tmp/test_fsync.out");
57-
write(tmpfile, &strout, 200);
69+
write(tmpfile, strout, 8192);
5870
fsync(tmpfile);
59-
close(tmpfile);
71+
close(tmpfile);
6072
gettimeofday(&elapse_t, NULL);
61-
unlink("/var/tmp/test_fsync.out");
62-
printf("write, fsync, close ");
73+
printf("\twrite, fsync, close ");
6374
print_elapse(start_t, elapse_t);
6475
printf("\n");
6576

6677
/* write, close, fsync */
6778
gettimeofday(&start_t, NULL);
68-
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_CREAT, 0600)) == -1)
79+
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR)) == -1)
6980
die("can't open /var/tmp/test_fsync.out");
70-
write(tmpfile, &strout, 200);
81+
write(tmpfile, strout, 8192);
7182
close(tmpfile);
7283
/* reopen file */
73-
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_CREAT, 0600)) == -1)
84+
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR)) == -1)
7485
die("can't open /var/tmp/test_fsync.out");
7586
fsync(tmpfile);
76-
close(tmpfile);
87+
close(tmpfile);
7788
gettimeofday(&elapse_t, NULL);
78-
unlink("/var/tmp/test_fsync.out");
79-
printf("write, close, fsync ");
89+
printf("\twrite, close, fsync ");
8090
print_elapse(start_t, elapse_t);
8191
printf("\n");
8292

83-
printf("\nTest file sync methods:\n");
93+
printf("\nCompare one o_sync write to two:\n");
94+
95+
/* 16k o_sync write */
96+
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | OPEN_SYNC_FLAG)) == -1)
97+
die("can't open /var/tmp/test_fsync.out");
98+
gettimeofday(&start_t, NULL);
99+
write(tmpfile, strout, 16384);
100+
gettimeofday(&elapse_t, NULL);
101+
close(tmpfile);
102+
printf("\tone 16k o_sync write ");
103+
print_elapse(start_t, elapse_t);
104+
printf("\n");
105+
106+
/* 2*8k o_sync writes */
107+
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | OPEN_SYNC_FLAG)) == -1)
108+
die("can't open /var/tmp/test_fsync.out");
109+
gettimeofday(&start_t, NULL);
110+
write(tmpfile, strout, 8192);
111+
write(tmpfile, strout, 8192);
112+
gettimeofday(&elapse_t, NULL);
113+
close(tmpfile);
114+
printf("\ttwo 8k o_sync writes ");
115+
print_elapse(start_t, elapse_t);
116+
printf("\n");
117+
118+
printf("\nCompare file sync methods with one 8k write:\n");
84119

85120
#ifdef OPEN_DATASYNC_FLAG
86121
/* open_dsync, write */
122+
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_DSYNC)) == -1)
123+
die("can't open /var/tmp/test_fsync.out");
87124
gettimeofday(&start_t, NULL);
88-
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_CREAT | O_DSYNC, 0600)) == -1)
125+
write(tmpfile, strout, 8192);
126+
gettimeofday(&elapse_t, NULL);
127+
close(tmpfile);
128+
printf("\topen o_dsync, write ");
129+
print_elapse(start_t, elapse_t);
130+
#else
131+
printf("\t(o_dsync unavailable) ");
132+
#endif
133+
printf("\n");
134+
135+
/* open_fsync, write */
136+
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | OPEN_SYNC_FLAG)) == -1)
89137
die("can't open /var/tmp/test_fsync.out");
90-
write(tmpfile, &strout, 200);
138+
gettimeofday(&start_t, NULL);
139+
write(tmpfile, strout, 8192);
140+
gettimeofday(&elapse_t, NULL);
91141
close(tmpfile);
142+
printf("\topen o_sync, write ");
143+
print_elapse(start_t, elapse_t);
144+
printf("\n");
145+
146+
#ifdef HAVE_FDATASYNC
147+
/* write, fdatasync */
148+
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR)) == -1)
149+
die("can't open /var/tmp/test_fsync.out");
150+
gettimeofday(&start_t, NULL);
151+
write(tmpfile, strout, 8192);
152+
fdatasync(tmpfile);
92153
gettimeofday(&elapse_t, NULL);
93-
unlink("/var/tmp/test_fsync.out");
94-
printf("open o_dsync, write ");
154+
close(tmpfile);
155+
printf("\twrite, fdatasync ");
95156
print_elapse(start_t, elapse_t);
96157
#else
97-
printf("o_dsync unavailable ");
158+
printf("\t(fdatasync unavailable)");
98159
#endif
99160
printf("\n");
100161

101-
/* open_fsync, write */
162+
/* write, fsync, close */
163+
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR)) == -1)
164+
die("can't open /var/tmp/test_fsync.out");
102165
gettimeofday(&start_t, NULL);
103-
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_CREAT | OPEN_SYNC_FLAG, 0600)) == -1)
166+
write(tmpfile, strout, 8192);
167+
fsync(tmpfile);
168+
gettimeofday(&elapse_t, NULL);
169+
close(tmpfile);
170+
printf("\twrite, fsync, ");
171+
print_elapse(start_t, elapse_t);
172+
printf("\n");
173+
174+
printf("\nCompare file sync methods with 2 8k writes:\n");
175+
176+
#ifdef OPEN_DATASYNC_FLAG
177+
/* open_dsync, write */
178+
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_DSYNC)) == -1)
104179
die("can't open /var/tmp/test_fsync.out");
105-
write(tmpfile, &strout, 200);
180+
gettimeofday(&start_t, NULL);
181+
write(tmpfile, strout, 8192);
182+
write(tmpfile, strout, 8192);
183+
gettimeofday(&elapse_t, NULL);
106184
close(tmpfile);
185+
printf("\topen o_dsync, write ");
186+
print_elapse(start_t, elapse_t);
187+
#else
188+
printf("\t(o_dsync unavailable) ");
189+
#endif
190+
printf("\n");
191+
192+
/* open_fsync, write */
193+
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | OPEN_SYNC_FLAG)) == -1)
194+
die("can't open /var/tmp/test_fsync.out");
195+
gettimeofday(&start_t, NULL);
196+
write(tmpfile, strout, 8192);
197+
write(tmpfile, strout, 8192);
107198
gettimeofday(&elapse_t, NULL);
108-
unlink("/var/tmp/test_fsync.out");
109-
printf("open o_fsync, write ");
199+
close(tmpfile);
200+
printf("\topen o_sync, write ");
110201
print_elapse(start_t, elapse_t);
111202
printf("\n");
112203

113204
#ifdef HAVE_FDATASYNC
114205
/* write, fdatasync */
115-
gettimeofday(&start_t, NULL);
116-
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_CREAT, 0600)) == -1)
206+
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR)) == -1)
117207
die("can't open /var/tmp/test_fsync.out");
118-
write(tmpfile, &strout, 200);
208+
gettimeofday(&start_t, NULL);
209+
write(tmpfile, strout, 8192);
210+
write(tmpfile, strout, 8192);
119211
fdatasync(tmpfile);
120-
close(tmpfile);
121212
gettimeofday(&elapse_t, NULL);
122-
unlink("/var/tmp/test_fsync.out");
123-
printf("write, fdatasync ");
213+
close(tmpfile);
214+
printf("\twrite, fdatasync ");
124215
print_elapse(start_t, elapse_t);
125216
#else
126-
printf("fdatasync unavailable ");
217+
printf("\t(fdatasync unavailable)");
127218
#endif
128219
printf("\n");
129220

130221
/* write, fsync, close */
131-
gettimeofday(&start_t, NULL);
132-
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_CREAT, 0600)) == -1)
222+
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR)) == -1)
133223
die("can't open /var/tmp/test_fsync.out");
134-
write(tmpfile, &strout, 200);
224+
gettimeofday(&start_t, NULL);
225+
write(tmpfile, strout, 8192);
226+
write(tmpfile, strout, 8192);
135227
fsync(tmpfile);
136-
close(tmpfile);
137228
gettimeofday(&elapse_t, NULL);
138-
unlink("/var/tmp/test_fsync.out");
139-
printf("write, fsync, ");
229+
close(tmpfile);
230+
printf("\twrite, fsync, ");
140231
print_elapse(start_t, elapse_t);
141232
printf("\n");
142233

234+
unlink("/var/tmp/test_fsync.out");
235+
143236
return 0;
144237
}
145238

146-
void print_elapse(struct timeval start_t, struct timeval elapse_t)
239+
void
240+
print_elapse(struct timeval start_t, struct timeval elapse_t)
147241
{
148242
if (elapse_t.tv_usec < start_t.tv_usec)
149243
{
@@ -152,10 +246,11 @@ void print_elapse(struct timeval start_t, struct timeval elapse_t)
152246
}
153247

154248
printf("%ld.%06ld", (long) (elapse_t.tv_sec - start_t.tv_sec),
155-
(long) (elapse_t.tv_usec - start_t.tv_usec));
249+
(long) (elapse_t.tv_usec - start_t.tv_usec));
156250
}
157251

158-
void die(char *str)
252+
void
253+
die(char *str)
159254
{
160255
fprintf(stderr, "%s", str);
161256
exit(1);

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