41 lines
1.8 KiB
C++
41 lines
1.8 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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#include "runtime/bufferpool/reservation_util.h"
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#include <algorithm>
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namespace doris {
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// Most operators that accumulate memory use reservations, so the majority of memory
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// should be allocated to buffer reservations, as a heuristic.
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const double ReservationUtil::RESERVATION_MEM_FRACTION = 0.8;
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const int64_t ReservationUtil::RESERVATION_MEM_MIN_REMAINING = 75 * 1024 * 1024;
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int64_t ReservationUtil::GetReservationLimitFromMemLimit(int64_t mem_limit) {
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int64_t max_reservation = std::min<int64_t>(RESERVATION_MEM_FRACTION * mem_limit,
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mem_limit - RESERVATION_MEM_MIN_REMAINING);
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return std::max<int64_t>(0, max_reservation);
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}
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int64_t ReservationUtil::GetMinMemLimitFromReservation(int64_t buffer_reservation) {
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buffer_reservation = std::max<int64_t>(0, buffer_reservation);
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return std::max<int64_t>(buffer_reservation * (1.0 / ReservationUtil::RESERVATION_MEM_FRACTION),
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buffer_reservation + ReservationUtil::RESERVATION_MEM_MIN_REMAINING);
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}
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} // namespace doris
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