99a2dd955f
There is no reason for the DPDK libraries to all have 'librte_' prefix on the directory names. This prefix makes the directory names longer and also makes it awkward to add features referring to individual libraries in the build - should the lib names be specified with or without the prefix. Therefore, we can just remove the library prefix and use the library's unique name as the directory name, i.e. 'eal' rather than 'librte_eal' Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
39 lines
966 B
C
39 lines
966 B
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2015 Cavium, Inc
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*/
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#include "eal_private.h"
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#include "rte_cycles.h"
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uint64_t
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get_tsc_freq_arch(void)
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{
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#if defined RTE_ARCH_ARM64 && !defined RTE_ARM_EAL_RDTSC_USE_PMU
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return __rte_arm64_cntfrq();
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#elif defined RTE_ARCH_ARM64 && defined RTE_ARM_EAL_RDTSC_USE_PMU
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#define CYC_PER_1MHZ 1E6
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/* Use the generic counter ticks to calculate the PMU
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* cycle frequency.
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*/
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uint64_t ticks;
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uint64_t start_ticks, cur_ticks;
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uint64_t start_pmu_cycles, end_pmu_cycles;
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/* Number of ticks for 1/10 second */
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ticks = __rte_arm64_cntfrq() / 10;
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start_ticks = __rte_arm64_cntvct_precise();
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start_pmu_cycles = rte_rdtsc_precise();
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do {
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cur_ticks = __rte_arm64_cntvct();
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} while ((cur_ticks - start_ticks) < ticks);
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end_pmu_cycles = rte_rdtsc_precise();
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/* Adjust the cycles to next 1Mhz */
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return RTE_ALIGN_MUL_CEIL(end_pmu_cycles - start_pmu_cycles,
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CYC_PER_1MHZ) * 10;
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#else
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return 0;
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#endif
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}
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