[dpdk-dev,1/4] timer: honor arch-specific TSC frequency query
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Commit Message
From: Jerin Jacob <jerin.jacob@caviumnetworks.com>
When calibrating the TSC frequency, first, probe the architecture specific
function. If not available, use the existing calibrate scheme.
Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
---
lib/librte_eal/bsdapp/eal/Makefile | 1 +
lib/librte_eal/common/arch/arm/rte_cycles.c | 7 +++++++
lib/librte_eal/common/arch/ppc_64/rte_cycles.c | 7 +++++++
lib/librte_eal/common/arch/x86/rte_cycles.c | 7 +++++++
lib/librte_eal/common/eal_common_timer.c | 5 ++++-
lib/librte_eal/common/eal_private.h | 11 +++++++++++
lib/librte_eal/linuxapp/eal/Makefile | 1 +
7 files changed, 38 insertions(+), 1 deletion(-)
create mode 100644 lib/librte_eal/common/arch/arm/rte_cycles.c
create mode 100644 lib/librte_eal/common/arch/ppc_64/rte_cycles.c
create mode 100644 lib/librte_eal/common/arch/x86/rte_cycles.c
@@ -92,6 +92,7 @@ SRCS-$(CONFIG_RTE_EXEC_ENV_BSDAPP) += rte_service.c
# from arch dir
SRCS-$(CONFIG_RTE_EXEC_ENV_BSDAPP) += rte_cpuflags.c
SRCS-$(CONFIG_RTE_ARCH_X86) += rte_spinlock.c
+SRCS-y += rte_cycles.c
CFLAGS_eal_common_cpuflags.o := $(CPUFLAGS_LIST)
new file mode 100644
@@ -0,0 +1,7 @@
+#include "eal_private.h"
+
+uint64_t
+get_tsc_freq_arch(void)
+{
+ return 0;
+}
new file mode 100644
@@ -0,0 +1,7 @@
+#include "eal_private.h"
+
+uint64_t
+get_tsc_freq_arch(void)
+{
+ return 0;
+}
new file mode 100644
@@ -0,0 +1,7 @@
+#include "eal_private.h"
+
+uint64_t
+get_tsc_freq_arch(void)
+{
+ return 0;
+}
@@ -80,8 +80,11 @@ estimate_tsc_freq(void)
void
set_tsc_freq(void)
{
- uint64_t freq = get_tsc_freq();
+ uint64_t freq;
+ freq = get_tsc_freq_arch();
+ if (!freq)
+ freq = get_tsc_freq();
if (!freq)
freq = estimate_tsc_freq();
@@ -314,6 +314,17 @@ void set_tsc_freq(void);
*/
uint64_t get_tsc_freq(void);
+/**
+ * Get TSC frequency if the architecture supports.
+ *
+ * This function is private to the EAL.
+ *
+ * @return
+ * The number of TSC cycles in one second.
+ * Returns zero if the architecture support is not available.
+ */
+uint64_t get_tsc_freq_arch(void);
+
/**
* Prepare physical memory mapping
* i.e. hugepages on Linux and
@@ -101,6 +101,7 @@ SRCS-$(CONFIG_RTE_EXEC_ENV_LINUXAPP) += rte_service.c
# from arch dir
SRCS-$(CONFIG_RTE_EXEC_ENV_LINUXAPP) += rte_cpuflags.c
SRCS-$(CONFIG_RTE_ARCH_X86) += rte_spinlock.c
+SRCS-y += rte_cycles.c
CFLAGS_eal_common_cpuflags.o := $(CPUFLAGS_LIST)