From: "Yordan Karadzhov (VMware)" <y.karadz@xxxxxxxxx>
kshark_convert_nano() is used to convert the original value of the
timestamp of the trace records (having nanosecond precision) into two
values representing the time in seconds and milliseconds.
Signed-off-by: Yordan Karadzhov (VMware) <y.karadz@xxxxxxxxx>
---
kernel-shark-qt/src/libkshark.c | 16 ++++++++++++++++
kernel-shark-qt/src/libkshark.h | 2 ++
2 files changed, 18 insertions(+)
diff --git a/kernel-shark-qt/src/libkshark.c b/kernel-shark-qt/src/libkshark.c
index ef577e0..d9d1929 100644
--- a/kernel-shark-qt/src/libkshark.c
+++ b/kernel-shark-qt/src/libkshark.c
@@ -1084,6 +1084,22 @@ const char *kshark_get_info_easy(struct kshark_entry *entry)
return info;
}
+/**
+ * @brief Convert the timestamp of the trace record (nanosecond precision) into
+ * seconds and microseconds.
+ *
+ * @param time: Input location for the timestamp.
+ * @param sec: Output location for the value of the seconds.
+ * @param usec: Output location for the value of the microseconds.
+ */
+void kshark_convert_nano(uint64_t time, uint64_t *sec, uint64_t *usec)
+{
+ uint64_t s;
+
+ *sec = s = time / 1000000000ULL;
+ *usec = (time - s * 1000000000ULL) / 1000;
+}
+
/**
* @brief Dump into a string the content of one entry. The function allocates
* a null terminated string and returns a pointer to this string. The
diff --git a/kernel-shark-qt/src/libkshark.h b/kernel-shark-qt/src/libkshark.h
index f00a584..d24ed8c 100644
--- a/kernel-shark-qt/src/libkshark.h
+++ b/kernel-shark-qt/src/libkshark.h
@@ -160,6 +160,8 @@ const char *kshark_get_event_name_easy(struct kshark_entry *entry);
const char *kshark_get_info_easy(struct kshark_entry *entry);
+void kshark_convert_nano(uint64_t time, uint64_t *sec, uint64_t *usec);
+
char* kshark_dump_entry(const struct kshark_entry *entry);
struct tep_record *kshark_read_at(struct kshark_context *kshark_ctx,
--
2.17.1
|