/*-
* BSD LICENSE
*
- * Copyright(c) 2010-2013 Intel Corporation. All rights reserved.
+ * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
* All rights reserved.
*
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
* are met:
*
- * * Redistributions of source code must retain the above copyright
+ * * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
* distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+/* BSD LICENSE
+ *
+ * Copyright(c) 2013 6WIND.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of 6WIND S.A. nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
*/
#ifndef _RTE_CYCLES_H_
#endif
#include <stdint.h>
+#include <rte_debug.h>
+
+#ifdef RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT
+/** Global switch to use VMWARE mapping of TSC instead of RDTSC */
+extern int rte_cycles_vmware_tsc_map;
+#include <rte_branch_prediction.h>
+#endif
+
+#define MS_PER_S 1000
+#define US_PER_S 1000000
+#define NS_PER_S 1000000000
+
+enum timer_source {
+ EAL_TIMER_TSC = 0,
+ EAL_TIMER_HPET
+};
+extern enum timer_source eal_timer_source;
/**
* Read the TSC register.
};
} tsc;
+#ifdef RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT
+ if (unlikely(rte_cycles_vmware_tsc_map)) {
+ /* ecx = 0x10000 corresponds to the physical TSC for VMware */
+ asm volatile("rdpmc" :
+ "=a" (tsc.lo_32),
+ "=d" (tsc.hi_32) :
+ "c"(0x10000));
+ return tsc.tsc_64;
+ }
+#endif
+
asm volatile("rdtsc" :
"=a" (tsc.lo_32),
"=d" (tsc.hi_32));
return tsc.tsc_64;
}
+/**
+ * Get the measured frequency of the RDTSC counter
+ *
+ * @return
+ * The TSC frequency for this lcore
+ */
+uint64_t
+rte_get_tsc_hz(void);
+
+/**
+ * Return the number of TSC cycles since boot
+ *
+ * @return
+ * the number of cycles
+ */
+static inline uint64_t
+rte_get_tsc_cycles(void) { return rte_rdtsc(); }
+
+#ifdef RTE_LIBEAL_USE_HPET
/**
* Return the number of HPET cycles since boot
*
* This counter is global for all execution units. The number of
- * cycles in one second can be retrived using rte_get_hpet_hz().
+ * cycles in one second can be retrieved using rte_get_hpet_hz().
*
* @return
* the number of cycles
rte_get_hpet_cycles(void);
/**
- * Get the number of cycles in one second.
+ * Get the number of HPET cycles in one second.
*
* @return
* The number of cycles in one second.
uint64_t
rte_get_hpet_hz(void);
+/**
+ * Initialise the HPET for use. This must be called before the rte_get_hpet_hz
+ * and rte_get_hpet_cycles APIs are called. If this function does not succeed,
+ * then the HPET functions are unavailable and should not be called.
+ *
+ * @param make_default
+ * If set, the hpet timer becomes the default timer whose values are
+ * returned by the rte_get_timer_hz/cycles API calls
+ *
+ * @return
+ * 0 on success,
+ * -1 on error, and the make_default parameter is ignored.
+ */
+int rte_eal_hpet_init(int make_default);
+
+#endif
+
+/**
+ * Get the number of cycles since boot from the default timer.
+ *
+ * @return
+ * The number of cycles
+ */
+static inline uint64_t
+rte_get_timer_cycles(void)
+{
+ switch(eal_timer_source) {
+ case EAL_TIMER_TSC:
+ return rte_rdtsc();
+ case EAL_TIMER_HPET:
+#ifdef RTE_LIBEAL_USE_HPET
+ return rte_get_hpet_cycles();
+#endif
+ default: rte_panic("Invalid timer source specified\n");
+ }
+}
+
+/**
+ * Get the number of cycles in one second for the default timer.
+ *
+ * @return
+ * The number of cycles in one second.
+ */
+static inline uint64_t
+rte_get_timer_hz(void)
+{
+ switch(eal_timer_source) {
+ case EAL_TIMER_TSC:
+ return rte_get_tsc_hz();
+ case EAL_TIMER_HPET:
+#ifdef RTE_LIBEAL_USE_HPET
+ return rte_get_hpet_hz();
+#endif
+ default: rte_panic("Invalid timer source specified\n");
+ }
+}
+
/**
* Wait at least us microseconds.
*
git.droids-corp.org / dpdk.git / blobdiff