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Extended file test for alignment

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This commit is contained in:
Lorenz Meier
2013-10-09 22:23:10 +02:00
parent 55f7c561ef
commit ed00567400
1 changed files with 44 additions and 33 deletions
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src/systemcmds/tests/tests_file.c
+44 -33
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@@ -63,24 +63,38 @@ test_file(int argc, char *argv[])
return 1;
}
uint8_t buf[512];
uint8_t write_buf[512 + 64];
/* fill write buffer with known values */
for (int i = 0; i < sizeof(write_buf); i++) {
/* this will wrap, but we just need a known value with spacing */
write_buf[i] = i+11;
}
uint8_t read_buf[512 + 64];
hrt_abstime start, end;
perf_counter_t wperf = perf_alloc(PC_ELAPSED, "SD writes (aligned)");
int fd = open("/fs/microsd/testfile", O_TRUNC | O_WRONLY | O_CREAT);
memset(buf, 0, sizeof(buf));
warnx("aligned write - please wait..");
if ((0x3 & (uintptr_t)buf))
warnx("memory is unaligned!");
warnx("testing aligned and unaligned writes - please wait..");
start = hrt_absolute_time();
for (unsigned i = 0; i < iterations; i++) {
perf_begin(wperf);
write(fd, buf, sizeof(buf));
int wret = write(fd, write_buf + (i % 64), 512);
if (wret != 512) {
warn("WRITE ERROR!");
if ((0x3 & (uintptr_t)(write_buf + (i % 64))))
warnx("memory is unaligned, align shift: %d", (i % 64));
}
fsync(fd);
perf_end(wperf);
}
end = hrt_absolute_time();
@@ -89,39 +103,36 @@ test_file(int argc, char *argv[])
perf_print_counter(wperf);
perf_free(wperf);
/* read back data for validation */
for (unsigned i = 0; i < iterations; i++) {
int rret = read(fd, read_buf, 512);
/* compare value */
for (int j = 0; j < 512; j++) {
if (read_buf[j] != write_buf[j + (i % 64)]) {
warnx("COMPARISON ERROR: byte %d, align shift: %d", j, (i % 64));
}
}
}
/* read back data for alignment checks */
// for (unsigned i = 0; i < iterations; i++) {
// perf_begin(wperf);
// int rret = read(fd, buf + (i % 64), sizeof(buf));
// fsync(fd);
// perf_end(wperf);
// }
int ret = unlink("/fs/microsd/testfile");
if (ret)
err(1, "UNLINKING FILE FAILED");
warnx("unaligned write - please wait..");
struct {
uint8_t byte;
uint8_t unaligned[512];
} unaligned_buf;
if ((0x3 & (uintptr_t)unaligned_buf.unaligned) == 0)
warnx("creating unaligned memory failed.");
wperf = perf_alloc(PC_ELAPSED, "SD writes (unaligned)");
start = hrt_absolute_time();
for (unsigned i = 0; i < iterations; i++) {
perf_begin(wperf);
write(fd, unaligned_buf.unaligned, sizeof(unaligned_buf.unaligned));
fsync(fd);
perf_end(wperf);
}
end = hrt_absolute_time();
close(fd);
warnx("%dKiB in %llu microseconds", iterations / 2, end - start);
perf_print_counter(wperf);
perf_free(wperf);
/* list directory */
DIR *d;
struct dirent *dir;