numam-dpdk/lib/librte_eal/common/arch/ppc_64/rte_cycles.c

/*
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 *   Copyright (C) IBM Corporation 2014.
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 *       from this software without specific prior written permission.
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#include <rte_lcore.h>
#include <rte_log.h>
#include "eal_filesystem.h"
#include "eal_private.h"

static const char sys_cpu_dir[] = "/sys/devices/system/cpu";

uint64_t
get_tsc_freq_arch(void)
{
	unsigned long cpu_hz;
	char path[PATH_MAX];

	snprintf(path, sizeof(path), "%s/cpu%d/cpufreq/cpuinfo_cur_freq",
			sys_cpu_dir, rte_get_master_lcore());
	if (eal_parse_sysfs_value(path, &cpu_hz) < 0)
		RTE_LOG(WARNING, EAL, "Unable to parse %s\n", path);

	return cpu_hz*1000;
}