/*-
* BSD LICENSE
- *
- * Copyright(c) 2010-2013 Intel Corporation. All rights reserved.
+ *
+ * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ * Copyright(c) 2012-2013 6WIND S.A.
* 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.
- *
*/
#include <string.h>
#include <rte_common.h>
#include <rte_log.h>
#include <rte_cycles.h>
-#include <rte_tailq.h>
#include <rte_memory.h>
#include <rte_memzone.h>
#include <rte_eal.h>
/* General capabilities register */
#define CLK_PERIOD_SHIFT 32 /* Clock period shift. */
#define CLK_PERIOD_MASK 0xffffffff00000000ULL /* Clock period mask. */
-#define COUNT_SIZE_CAP_SHIFT 13 /* Count size capa. shift. */
-#define COUNT_SIZE_CAP_MASK 0x0000000000002000ULL /* Count size capa. mask. */
/**
* HPET timer registers. From the Intel IA-PC HPET (High Precision Event
}
#endif
+static void
+check_tsc_flags(void)
+{
+ char line[512];
+ FILE *stream;
+
+ stream = fopen("/proc/cpuinfo", "r");
+ if (!stream) {
+ RTE_LOG(WARNING, EAL, "WARNING: Unable to open /proc/cpuinfo\n");
+ return;
+ }
+
+ while (fgets(line, sizeof line, stream)) {
+ char *constant_tsc;
+ char *nonstop_tsc;
+
+ if (strncmp(line, "flags", 5) != 0)
+ continue;
+
+ constant_tsc = strstr(line, "constant_tsc");
+ nonstop_tsc = strstr(line, "nonstop_tsc");
+ if (!constant_tsc || !nonstop_tsc)
+ RTE_LOG(WARNING, EAL,
+ "WARNING: cpu flags "
+ "constant_tsc=%s "
+ "nonstop_tsc=%s "
+ "-> using unreliable clock cycles !\n",
+ constant_tsc ? "yes":"no",
+ nonstop_tsc ? "yes":"no");
+ break;
+ }
+
+ fclose(stream);
+}
+
static int
set_tsc_freq_from_clock(void)
{
eal_timer_source = EAL_TIMER_TSC;
set_tsc_freq();
+ check_tsc_flags();
return 0;
}