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56 lines
1.5 KiB
56 lines
1.5 KiB
8 years ago
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/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License. */
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#include "paddle/platform/cpu_info.h"
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#ifdef __APPLE__
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#include <sys/sysctl.h>
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#include <sys/types.h>
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#else
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#include <unistd.h>
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#endif
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#include "gflags/gflags.h"
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#include "paddle/platform/error.h"
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DEFINE_double(fraction_of_cpu_memory_to_use, 1,
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"Default use 100% of CPU memory for PaddlePaddle,"
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"reserve the rest for page tables, etc");
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namespace paddle {
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namespace platform {
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inline size_t CpuTotalPhysicalMemory() {
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#ifdef __APPLE__
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int mib[2];
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mib[0] = CTL_HW;
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mib[1] = HW_MEMSIZE;
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int64_t size = 0;
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size_t len = sizeof(size);
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if (sysctl(mib, 2, &size, &len, NULL, 0) == 0) return (size_t)size;
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return 0L;
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#else
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long pages = sysconf(_SC_PHYS_PAGES);
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long page_size = sysconf(_SC_PAGE_SIZE);
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return pages * page_size;
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#endif
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}
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size_t CpuTotalMemory() {
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return FLAGS_fraction_of_cpu_memory_to_use * CpuTotalPhysicalMemory();
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}
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} // namespace platform
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} // namespace paddle
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