Many PMDs use POSIX gettimeofday(). Add rte_time_get_us() function
to obtain current time with microsecond precision on all platforms.
Signed-off-by: Dmitry Kozlyuk <dmitry.kozl...@gmail.com>
---
lib/librte_eal/include/rte_time.h | 17 +++++++++++++++++
lib/librte_eal/rte_eal_exports.def | 1 +
lib/librte_eal/unix/eal_unix_timer.c | 13 +++++++++++++
lib/librte_eal/version.map | 1 +
lib/librte_eal/windows/eal_timer.c | 21 ++++++++++++++++++++-
5 files changed, 52 insertions(+), 1 deletion(-)
diff --git a/lib/librte_eal/include/rte_time.h
b/lib/librte_eal/include/rte_time.h
index 5ad7c8841..50fa4f889 100644
--- a/lib/librte_eal/include/rte_time.h
+++ b/lib/librte_eal/include/rte_time.h
@@ -8,6 +8,8 @@
#include <stdint.h>
#include <time.h>
+#include <rte_compat.h>
+
#define NSEC_PER_SEC 1000000000L
/**
@@ -98,4 +100,19 @@ rte_ns_to_timespec(uint64_t nsec)
return ts;
}
+/* Point of time with microsecond precision. */
+struct rte_time_us {
+ int64_t sec; /**< Number of whole seconds. */
+ int64_t usec; /**< Fractional part of second in [0, 999999]. */
+};
+
+/**
+ * Get current system time.
+ *
+ * @param now
+ * Receives current system time.
+ */
+__rte_internal
+void rte_time_get_us(struct rte_time_us *now);
+
#endif /* _RTE_TIME_H_ */
diff --git a/lib/librte_eal/rte_eal_exports.def
b/lib/librte_eal/rte_eal_exports.def
index 474cf123f..cb691f7bc 100644
--- a/lib/librte_eal/rte_eal_exports.def
+++ b/lib/librte_eal/rte_eal_exports.def
@@ -334,3 +334,4 @@ EXPORTS
rte_mem_map
rte_mem_page_size
rte_mem_unmap
+ rte_time_get_us
diff --git a/lib/librte_eal/unix/eal_unix_timer.c
b/lib/librte_eal/unix/eal_unix_timer.c
index cc5015910..5612fdebe 100644
--- a/lib/librte_eal/unix/eal_unix_timer.c
+++ b/lib/librte_eal/unix/eal_unix_timer.c
@@ -4,7 +4,10 @@
#include <time.h>
+#include <sys/time.h>
+
#include <rte_cycles.h>
+#include <rte_time.h>
void
rte_delay_us_sleep(unsigned int us)
@@ -27,3 +30,13 @@ rte_delay_us_sleep(unsigned int us)
ind = 1 - ind;
}
}
+
+void
+rte_time_get_us(struct rte_time_us *now)
+{
+ struct timeval sys;
+
+ gettimeofday(&sys, NULL);
+ now->sec = sys.tv_sec;
+ now->usec = sys.tv_usec;
+}
diff --git a/lib/librte_eal/version.map b/lib/librte_eal/version.map
index fce90a112..405bed766 100644
--- a/lib/librte_eal/version.map
+++ b/lib/librte_eal/version.map
@@ -421,4 +421,5 @@ INTERNAL {
rte_mem_map;
rte_mem_page_size;
rte_mem_unmap;
+ rte_time_get_us;
};
diff --git a/lib/librte_eal/windows/eal_timer.c
b/lib/librte_eal/windows/eal_timer.c
index b070cb775..a5c42106a 100644
--- a/lib/librte_eal/windows/eal_timer.c
+++ b/lib/librte_eal/windows/eal_timer.c
@@ -9,6 +9,7 @@
#include <rte_cycles.h>
#include <rte_eal.h>
#include <rte_errno.h>
+#include <rte_time.h>
#include "eal_private.h"
#define US_PER_SEC 1E6
@@ -85,10 +86,28 @@ get_tsc_freq(void)
return RTE_ALIGN_MUL_NEAR(tsc_hz, CYC_PER_10MHZ);
}
-
int
rte_eal_timer_init(void)
{
set_tsc_freq();
return 0;
}
+
+void
+rte_time_get_us(struct rte_time_us *now)
+{
+ /* 100ns ticks from 1601-01-01 to 1970-01-01 */
+ static const uint64_t EPOCH = 116444736000000000ULL;
+ static const uint64_t TICKS_PER_USEC = 10;
+ static const uint64_t USEC_PER_SEC = 1000000;
+
+ FILETIME ft;
+ uint64_t ticks, sec;
+
+ GetSystemTimePreciseAsFileTime(&ft);
+ ticks = ((uint64_t)ft.dwHighDateTime << 32) | ft.dwLowDateTime;
+ ticks -= EPOCH;
+ sec = ticks / (TICKS_PER_USEC * USEC_PER_SEC);
+ now->sec = sec;
+ now->usec = ticks / TICKS_PER_USEC - sec * USEC_PER_SEC;
+}
--
2.29.2
