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https://github.com/prometheus/node_exporter.git
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c12d8ea927
It is sometimes useful to understand the distribution of free/occupied memory between NUMA nodes to deal with performance problems. To do so, add new meminfo_numa collector that enables exporting of per node statistics along with unit and end-to-end tests for it. Signed-off-by: Pavel Borzenkov <pavel.borzenkov@gmail.com>
60 lines
1.6 KiB
Go
60 lines
1.6 KiB
Go
// Copyright 2015 The Prometheus Authors
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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 collector
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import (
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"os"
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"testing"
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)
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func TestMemInfoNuma(t *testing.T) {
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file, err := os.Open("fixtures/sys/devices/system/node/node0/meminfo")
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if err != nil {
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t.Fatal(err)
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}
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defer file.Close()
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memInfo, err := parseMemInfoNuma(file)
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if err != nil {
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t.Fatal(err)
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}
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if want, got := 707915776.0, memInfo[meminfoKey{"Active_anon", "0"}]; want != got {
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t.Errorf("want memory Active(anon) %f, got %f", want, got)
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}
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if want, got := 150994944.0, memInfo[meminfoKey{"AnonHugePages", "0"}]; want != got {
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t.Errorf("want memory AnonHugePages %f, got %f", want, got)
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}
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file, err = os.Open("fixtures/sys/devices/system/node/node1/meminfo")
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if err != nil {
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t.Fatal(err)
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}
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defer file.Close()
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memInfo, err = parseMemInfoNuma(file)
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if err != nil {
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t.Fatal(err)
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}
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if want, got := 291930112.0, memInfo[meminfoKey{"Inactive_anon", "1"}]; want != got {
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t.Errorf("want memory Inactive(anon) %f, got %f", want, got)
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}
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if want, got := 85585088512.0, memInfo[meminfoKey{"FilePages", "1"}]; want != got {
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t.Errorf("want memory FilePages %f, got %f", want, got)
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}
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}
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