8b8bec3b3a
Create a highmem pool based on the total RAM and the number of CPUs, with an override via the NINJA_HIGHMEM_NUM_JOBS variable. Put metalava into the highmem pool. Ninja does not support nested pools, and when goma or RBE is enabled the maximum ninja parallelism is set very high with local jobs in a local pool. When both the local pool and highmem pool are enabled, the total number of local jobs will be as high as the sum of the sizes of the two pools. Keep the highmem pool limited to 1/16th of the local pool when remote builds are enabled to try to minimize the effect while still limiting highmem jobs. Fixes: 142644983 Test: m nothing, examine pools Test: m USE_GOMA=true nothing, examine pools Change-Id: Id79f11f44948992960ac34ecf831dacbe21bd332
40 lines
1.1 KiB
Go
40 lines
1.1 KiB
Go
// Copyright 2019 Google Inc. All rights reserved.
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//
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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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//
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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, 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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package build
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import (
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"encoding/binary"
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"syscall"
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)
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func detectTotalRAM(ctx Context) uint64 {
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s, err := syscall.Sysctl("hw.memsize")
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if err != nil {
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ctx.Printf("Failed to get system memory size: %v", err)
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return 0
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}
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// syscall.Sysctl assumes that the return value is a string and trims the last byte if it is 0.
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if len(s) == 7 {
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s += "\x00"
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}
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if len(s) != 8 {
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ctx.Printf("Failed to get system memory size, returned %d bytes, expecting 8 bytes", len(s))
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return 0
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}
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return binary.LittleEndian.Uint64([]byte(s))
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}
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