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author | Lorenz Meier <lm@inf.ethz.ch> | 2013-10-09 22:23:10 +0200 |
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committer | Lorenz Meier <lm@inf.ethz.ch> | 2013-10-09 22:23:10 +0200 |
commit | ed00567400bd6ce24e25dc1038ce40f959205a68 (patch) | |
tree | e3ac9555fd69a6923a1ebebd8c2b1793d2403e6b /src/systemcmds/tests | |
parent | 55f7c561efde3af1fcf562f71391a94711480988 (diff) | |
download | px4-firmware-ed00567400bd6ce24e25dc1038ce40f959205a68.tar.gz px4-firmware-ed00567400bd6ce24e25dc1038ce40f959205a68.tar.bz2 px4-firmware-ed00567400bd6ce24e25dc1038ce40f959205a68.zip |
Extended file test for alignment
Diffstat (limited to 'src/systemcmds/tests')
-rw-r--r-- | src/systemcmds/tests/tests_file.c | 75 |
1 files changed, 43 insertions, 32 deletions
diff --git a/src/systemcmds/tests/tests_file.c b/src/systemcmds/tests/tests_file.c index f36c28061..372bc5c90 100644 --- a/src/systemcmds/tests/tests_file.c +++ b/src/systemcmds/tests/tests_file.c @@ -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); - int ret = unlink("/fs/microsd/testfile"); - - if (ret) - err(1, "UNLINKING FILE FAILED"); + /* 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)); + } + } - warnx("unaligned write - please wait.."); + } - struct { - uint8_t byte; - uint8_t unaligned[512]; - } unaligned_buf; + /* 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); - if ((0x3 & (uintptr_t)unaligned_buf.unaligned) == 0) - warnx("creating unaligned memory failed."); + // } - wperf = perf_alloc(PC_ELAPSED, "SD writes (unaligned)"); + int ret = unlink("/fs/microsd/testfile"); - 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(); + if (ret) + err(1, "UNLINKING FILE FAILED"); 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; |