Add --debug for enabling internal dumps on various actions
A little weak currently, when it's fully integrated everywhere in
fio it'll help find fio problems that I can't trigger.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/init.c b/init.c
index 4762a81..dcad1b3 100644
--- a/init.c
+++ b/init.c
@@ -43,6 +43,8 @@
static int prev_group_jobs;
+unsigned long fio_debug = 0;
+
/*
* Command line options. These will contain the above, plus a few
* extra that only pertain to fio itself and not jobs.
@@ -104,6 +106,11 @@
.val = 'e',
},
{
+ .name = "debug",
+ .has_arg = required_argument,
+ .val = 'd',
+ },
+ {
.name = NULL,
},
};
@@ -758,6 +765,7 @@
{
printf("%s\n", fio_version_string);
printf("%s [options] [job options] <job file(s)>\n", name);
+ printf("\t--debug=options\tEnable debug logging\n");
printf("\t--output\tWrite output to file\n");
printf("\t--timeout\tRuntime in seconds\n");
printf("\t--latency-log\tGenerate per-job latency logs\n");
@@ -771,6 +779,56 @@
printf("\t \tMay be \"always\", \"never\" or \"auto\"\n");
}
+struct debug_level {
+ const char *name;
+ unsigned long mask;
+};
+
+struct debug_level debug_levels[] = {
+ { .name = "process", .mask = FD_PROCESS, },
+ { .name = "file", .mask = FD_PROCESS, },
+ { .name = "io", .mask = FD_IO, },
+ { .name = "mem", .mask = FD_MEM, },
+ { },
+};
+
+static void set_debug(const char *string)
+{
+ struct debug_level *dl;
+ char *p = (char *) string;
+ char *opt;
+ int i;
+
+ if (!strcmp(string, "?") || !strcmp(string, "help")) {
+ int i;
+
+ log_info("fio: dumping debug options:");
+ for (i = 0; debug_levels[i].name; i++) {
+ dl = &debug_levels[i];
+ log_info("%s,", dl->name);
+ }
+ log_info("\n");
+ return;
+ }
+
+ while ((opt = strsep(&p, ",")) != NULL) {
+ int found = 0;
+
+ for (i = 0; debug_levels[i].name; i++) {
+ dl = &debug_levels[i];
+ if (!strncmp(opt, dl->name, strlen(opt))) {
+ log_info("fio: set debug option %s\n", opt);
+ found = 1;
+ fio_debug |= dl->mask;
+ break;
+ }
+ }
+
+ if (!found)
+ log_err("fio: debug mask %s not found\n", opt);
+ }
+}
+
static int parse_cmd_line(int argc, char *argv[])
{
struct thread_data *td = NULL;
@@ -818,6 +876,9 @@
else if (!strcmp("never", optarg))
eta_print = FIO_ETA_NEVER;
break;
+ case 'd':
+ set_debug(optarg);
+ break;
case FIO_GETOPT_JOB: {
const char *opt = long_options[lidx].name;
char *val = optarg;