#include <ftw.h>
#include <dirent.h>
#include <unistd.h>
+#include <inttypes.h>
#include <babeltrace/ctf-ir/metadata.h> /* for clocks */
struct clock_match {
GHashTable *clocks;
struct ctf_clock *clock_match;
+ struct trace_collection *tc;
};
static void check_clock_match(gpointer key, gpointer value, gpointer user_data)
static void clock_add(gpointer key, gpointer value, gpointer user_data)
{
- GHashTable *tc_clocks = user_data;
+ struct clock_match *clock_match = user_data;
+ GHashTable *tc_clocks = clock_match->clocks;
struct ctf_clock *t_clock = value;
GQuark v;
v = t_clock->name;
else
v = t_clock->uuid;
- if (v)
- g_hash_table_insert(tc_clocks,
- (gpointer) (unsigned long) v,
- value);
+ if (v) {
+ struct ctf_clock *tc_clock;
+
+ tc_clock = g_hash_table_lookup(tc_clocks,
+ (gpointer) (unsigned long) v);
+ if (!tc_clock) {
+ /*
+ * For now, we only support CTF that has one
+ * single clock.
+ */
+ if (g_hash_table_size(tc_clocks) > 0) {
+ fprintf(stderr, "[error] Only CTF traces with a single clock description are supported by this babeltrace version.\n");
+ }
+ if (!clock_match->tc->single_clock) {
+ clock_match->tc->single_clock = value;
+ }
+ g_hash_table_insert(tc_clocks,
+ (gpointer) (unsigned long) v,
+ value);
+ } else {
+ int64_t diff_ns;
+
+ /*
+ * Check that the offsets match. If not, warn
+ * the user that we do an arbitrary choice.
+ */
+ diff_ns = tc_clock->offset_s;
+ diff_ns -= t_clock->offset_s;
+ diff_ns *= 1000000000ULL;
+ diff_ns += tc_clock->offset;
+ diff_ns -= t_clock->offset;
+ printf_debug("Clock \"%s\" offset between traces has a delta of %" PRIu64 " ns.",
+ g_quark_to_string(tc_clock->name),
+ diff_ns < 0 ? -diff_ns : diff_ns);
+ if (diff_ns > 10000) {
+ fprintf(stderr, "[warning] Clock \"%s\" offset differs between traces (delta %" PRIu64 " ns). Choosing one arbitrarily.\n",
+ g_quark_to_string(tc_clock->name),
+ diff_ns < 0 ? -diff_ns : diff_ns);
+ }
+ }
+ }
}
/*
struct ctf_trace *trace = container_of(td, struct ctf_trace, parent);
g_ptr_array_add(tc->array, td);
+ trace->collection = tc;
if (tc->array->len > 1) {
struct clock_match clock_match = {
.clocks = tc->clocks,
.clock_match = NULL,
+ .tc = NULL,
};
/*
goto error;
}
}
- /*
- * Add each clock from the trace clocks into the trace
- * collection clocks.
- */
- g_hash_table_foreach(trace->clocks,
- clock_add,
- tc->clocks);
+
+ {
+ struct clock_match clock_match = {
+ .clocks = tc->clocks,
+ .clock_match = NULL,
+ .tc = tc,
+ };
+
+ /*
+ * Add each clock from the trace clocks into the trace
+ * collection clocks.
+ */
+ g_hash_table_foreach(trace->clocks,
+ clock_add,
+ &clock_match);
+ }
return 0;
error:
return -EPERM;