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#90 debug long fsync system calls

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This commit is contained in:
Rich Prohaska 2013-11-11 08:02:31 -05:00
parent f5ca05e283
commit 8ab796c431
1 changed files with 24 additions and 0 deletions
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24
portability/file.cc
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@ -449,6 +449,8 @@ static uint64_t toku_fsync_time;
static uint64_t toku_long_fsync_threshold = 1000000;
static uint64_t toku_long_fsync_count;
static uint64_t toku_long_fsync_time;
static uint64_t toku_long_fsync_eintr_count;
static int toku_fsync_debug = 0;
void toku_set_func_fsync(int (*fsync_function)(int)) {
t_fsync = fsync_function;
@ -458,6 +460,7 @@ void toku_set_func_fsync(int (*fsync_function)(int)) {
static void file_fsync_internal (int fd) {
uint64_t tstart = toku_current_time_microsec();
int r = -1;
uint64_t eintr_count = 0;
while (r != 0) {
if (t_fsync) {
r = t_fsync(fd);
@ -466,6 +469,7 @@ static void file_fsync_internal (int fd) {
}
if (r) {
assert(get_error_errno() == EINTR);
eintr_count++;
}
}
toku_sync_fetch_and_add(&toku_fsync_count, 1);
@ -474,6 +478,26 @@ static void file_fsync_internal (int fd) {
if (duration >= toku_long_fsync_threshold) {
toku_sync_fetch_and_add(&toku_long_fsync_count, 1);
toku_sync_fetch_and_add(&toku_long_fsync_time, duration);
toku_sync_fetch_and_add(&toku_long_fsync_eintr_count, eintr_count);
if (toku_fsync_debug) {
const int tstr_length = 26;
char tstr[tstr_length];
time_t t = time(0);
#if __linux__
char fdname[256];
snprintf(fdname, sizeof fdname, "/proc/%d/fd/%d", getpid(), fd);
char lname[256];
ssize_t s = readlink(fdname, lname, sizeof lname);
if (0 < s && s < (ssize_t) sizeof lname)
lname[s] = 0;
fprintf(stderr, "%.24s toku_file_fsync %s fd=%d %s duration=%" PRIu64 " usec eintr=%" PRIu64 "\n",
ctime_r(&t, tstr), __FUNCTION__, fd, s > 0 ? lname : "?", duration, eintr_count);
#else
fprintf(stderr, "%.24s toku_file_fsync %s fd=%d duration=%" PRIu64 " usec eintr=%" PRIu64 "\n",
ctime_r(&t, tstr), __FUNCTION__, fd, duration, eintr_count);
#endif
fflush(stderr);
}
}
}