client_golang/Makefile

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# Copyright 2013 The Prometheus Authors
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
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VERSION=$(shell cat `git rev-parse --show-toplevel`/VERSION)
OS = $(shell uname)
ARCH = $(shell uname -m)
MAC_OS_X_VERSION ?= 10.8
BUILD_PATH = $(PWD)/.build
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export GO_VERSION = 1.4.2
export GOOS = $(subst Darwin,darwin,$(subst Linux,linux,$(subst FreeBSD,freebsd,$(OS))))
ifeq ($(GOOS),darwin)
RELEASE_SUFFIX ?= -osx$(MAC_OS_X_VERSION)
else
RELEASE_SUFFIX ?=
endif
# Never honor GOBIN, should it be set at all.
unexport GOBIN
export GOARCH = $(subst x86_64,amd64,$(patsubst i%86,386,$(ARCH)))
export GOPKG = go$(GO_VERSION).$(GOOS)-$(GOARCH)$(RELEASE_SUFFIX).tar.gz
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export GOURL = https://golang.org/dl
export GOROOT = $(BUILD_PATH)/root/go
export GOPATH = $(BUILD_PATH)/root/gopath
export GOCC = $(GOROOT)/bin/go
export TMPDIR = /tmp
export GOENV = TMPDIR=$(TMPDIR) GOROOT=$(GOROOT) GOPATH=$(GOPATH)
export GO = $(GOENV) $(GOCC)
export GOFMT = $(GOROOT)/bin/gofmt
export GODOC = $(GOENV) $(GOROOT)/bin/godoc
Optimize fingerprinting and metric locks. These are all simple changes we should have caught a long time ago: 1. The hashing mechanism for fingerprint label sets should have not allocated new objects for the actual hashing---at least not egregiously. This simplifies the hash writing by just byte- dumping the string stream into the hasher. 2. The hashing mechanism within the scope of a metric does not care about the value of the label keys themselves but only of the label values. The keys can be dropped from the calculation. 3. The locking mechanism for the metrics should not block on hash computation but rather solely on the actual mutation or critical section reads. 4. For scalar metrics (i.e., ones with niladic label signatures), we should rely on a preallocated map versus requesting a new one ad hoc. This is tested with Go 1.1, so the results may yield other values for us elsewhere: BEFORE BenchmarkLabelValuesToSignatureScalar 500000000 3.97 ns/op 0 B/op 0 allocs/op BenchmarkLabelValuesToSignatureSingle 5000000 714 ns/op 74 B/op 4 allocs/op BenchmarkLabelValuesToSignatureDouble 1000000 1153 ns/op 107 B/op 5 allocs/op BenchmarkLabelValuesToSignatureTriple 1000000 1588 ns/op 138 B/op 6 allocs/op BenchmarkLabelToSignatureScalar 500000000 3.91 ns/op 0 B/op 0 allocs/op BenchmarkLabelToSignatureSingle 2000000 874 ns/op 92 B/op 5 allocs/op BenchmarkLabelToSignatureDouble 1000000 1528 ns/op 139 B/op 7 allocs/op BenchmarkLabelToSignatureTriple 1000000 2172 ns/op 186 B/op 9 allocs/op AFTER BenchmarkLabelValuesToSignatureScalar 500000000 4.36 ns/op 0 B/op 0 allocs/op BenchmarkLabelValuesToSignatureSingle 5000000 378 ns/op 89 B/op 4 allocs/op BenchmarkLabelValuesToSignatureDouble 5000000 574 ns/op 142 B/op 5 allocs/op BenchmarkLabelValuesToSignatureTriple 5000000 758 ns/op 186 B/op 6 allocs/op BenchmarkLabelToSignatureScalar 500000000 4.06 ns/op 0 B/op 0 allocs/op BenchmarkLabelToSignatureSingle 5000000 472 ns/op 106 B/op 5 allocs/op BenchmarkLabelToSignatureDouble 2000000 746 ns/op 174 B/op 7 allocs/op BenchmarkLabelToSignatureTriple 1000000 1061 ns/op 235 B/op 9 allocs/op In effect, a single metric mutation operation's lookup overhead will move from Before::iBenchmarkLabelToSignature to After::BenchmarkLabelValuesToSignature. This MINIMALLY reduces 1/2 the overhead. I would be hesitant in reading the memory allocation statistics, for this was run with the GC still on and thusly inaccurate per Go benchmarking documentation. Before::BenchmarkLabelValuesToSignature never existed, so it is not of any intrinsic value in itself. That said, the cases that still rely on LabelToSignature experience consistently a 1/2 drop in time. Change-Id: Ifc9e69f718af65a59f5be8117473518233258159
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BENCHMARK_FILTER ?= .
FULL_GOPATH = $(GOPATH)/src/github.com/prometheus/client_golang
FULL_GOPATH_BASE = $(GOPATH)/src/github.com/prometheus
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MAKE_ARTIFACTS = search_index $(BUILD_PATH) example_random example_simple
all: test
$(BUILD_PATH):
mkdir -vp $(BUILD_PATH)
$(BUILD_PATH)/cache: $(BUILD_PATH)
mkdir -vp $(BUILD_PATH)/cache
$(BUILD_PATH)/root: $(BUILD_PATH)
mkdir -vp $(BUILD_PATH)/root
$(BUILD_PATH)/cache/$(GOPKG): $(BUILD_PATH)/cache
curl -o $@ -L $(GOURL)/$(GOPKG)
$(GOCC): $(BUILD_PATH)/root $(BUILD_PATH)/cache/$(GOPKG)
tar -C $(BUILD_PATH)/root -xzf $(BUILD_PATH)/cache/$(GOPKG)
touch $@
build: source_path dependencies
$(GO) build ./...
dependencies: source_path $(GOCC)
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cp -a $(CURDIR)/Godeps/_workspace/src/* $(GOPATH)/src
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example_random: source_path dependencies examples/random/main.go
$(GO) build -o example_random examples/random/main.go
example_simple: source_path dependencies examples/simple/main.go
$(GO) build -o example_simple examples/simple/main.go
test: build
$(GO) test -short ./...
Optimize fingerprinting and metric locks. These are all simple changes we should have caught a long time ago: 1. The hashing mechanism for fingerprint label sets should have not allocated new objects for the actual hashing---at least not egregiously. This simplifies the hash writing by just byte- dumping the string stream into the hasher. 2. The hashing mechanism within the scope of a metric does not care about the value of the label keys themselves but only of the label values. The keys can be dropped from the calculation. 3. The locking mechanism for the metrics should not block on hash computation but rather solely on the actual mutation or critical section reads. 4. For scalar metrics (i.e., ones with niladic label signatures), we should rely on a preallocated map versus requesting a new one ad hoc. This is tested with Go 1.1, so the results may yield other values for us elsewhere: BEFORE BenchmarkLabelValuesToSignatureScalar 500000000 3.97 ns/op 0 B/op 0 allocs/op BenchmarkLabelValuesToSignatureSingle 5000000 714 ns/op 74 B/op 4 allocs/op BenchmarkLabelValuesToSignatureDouble 1000000 1153 ns/op 107 B/op 5 allocs/op BenchmarkLabelValuesToSignatureTriple 1000000 1588 ns/op 138 B/op 6 allocs/op BenchmarkLabelToSignatureScalar 500000000 3.91 ns/op 0 B/op 0 allocs/op BenchmarkLabelToSignatureSingle 2000000 874 ns/op 92 B/op 5 allocs/op BenchmarkLabelToSignatureDouble 1000000 1528 ns/op 139 B/op 7 allocs/op BenchmarkLabelToSignatureTriple 1000000 2172 ns/op 186 B/op 9 allocs/op AFTER BenchmarkLabelValuesToSignatureScalar 500000000 4.36 ns/op 0 B/op 0 allocs/op BenchmarkLabelValuesToSignatureSingle 5000000 378 ns/op 89 B/op 4 allocs/op BenchmarkLabelValuesToSignatureDouble 5000000 574 ns/op 142 B/op 5 allocs/op BenchmarkLabelValuesToSignatureTriple 5000000 758 ns/op 186 B/op 6 allocs/op BenchmarkLabelToSignatureScalar 500000000 4.06 ns/op 0 B/op 0 allocs/op BenchmarkLabelToSignatureSingle 5000000 472 ns/op 106 B/op 5 allocs/op BenchmarkLabelToSignatureDouble 2000000 746 ns/op 174 B/op 7 allocs/op BenchmarkLabelToSignatureTriple 1000000 1061 ns/op 235 B/op 9 allocs/op In effect, a single metric mutation operation's lookup overhead will move from Before::iBenchmarkLabelToSignature to After::BenchmarkLabelValuesToSignature. This MINIMALLY reduces 1/2 the overhead. I would be hesitant in reading the memory allocation statistics, for this was run with the GC still on and thusly inaccurate per Go benchmarking documentation. Before::BenchmarkLabelValuesToSignature never existed, so it is not of any intrinsic value in itself. That said, the cases that still rely on LabelToSignature experience consistently a 1/2 drop in time. Change-Id: Ifc9e69f718af65a59f5be8117473518233258159
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benchmark: build
$(GO) test -benchmem -test.bench="$(BENCHMARK_FILTER)" ./...
advice: test
$(GO) vet ./...
format:
find . -iname '*.go' | grep -vE '^./(.build|Godeps)/' | xargs -n1 -P1 $(GOFMT) -w -s=true
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tag:
git tag $(VERSION)
git push --tags
search_index:
$(GODOC) -index -write_index -index_files='search_index'
# source_path is responsible for ensuring that the builder has not done anything
# stupid like working on Prometheus outside of ${GOPATH}.
source_path:
-[ -d "$(FULL_GOPATH)" ] || { mkdir -vp $(FULL_GOPATH_BASE) ; ln -s "$(PWD)" "$(FULL_GOPATH)" ; }
[ -d "$(FULL_GOPATH)" ]
documentation: search_index
$(GODOC) -http=:6060 -index -index_files='search_index'
clean:
rm -rf $(MAKE_ARTIFACTS)
find . -iname '*~' -exec rm -f '{}' ';'
find . -iname '*#' -exec rm -f '{}' ';'
.PHONY: advice build clean documentation format source_path test