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Pre-Requisite
Install Graphviz
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See https://graphviz.org/download/
Benchmarks
We can add in a benchmark test which will allow us to profile a section of code.
Creating Profiles from Benchmark Test
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go test -bench=. -run=x -benchmem -memprofile mem.prof -cpuprofile cpu.prof -benchtime=5s > 0.bench |
After running the benchmark we can use the outputted profiles with pprof.
Adding Profiling to your Application
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go tool pprof heap.out |
(pprof) top
Showing nodes accounting for 16903.23kB, 100% of 16903.23kB total
Showing top 10 nodes out of 51
flat flat% sum% cum cum%
12292.12kB 72.72% 72.72% 12292.12kB 72.72% github.com/syndtr/goleveldb/leveldb/memdb.New
2562.81kB 15.16% 87.88% 2562.81kB 15.16% runtime.allocm
512.20kB 3.03% 90.91% 512.20kB 3.03% runtime.malg
512.05kB 3.03% 93.94% 512.05kB 3.03% runtime.acquireSudog
512.04kB 3.03% 96.97% 512.04kB 3.03% github.com/lovoo/goka.newPartitionProcessor
512.01kB 3.03% 100% 512.01kB 3.03% github.com/rcrowley/go-metrics.NewHistogram (inline)
0 0% 100% 512.01kB 3.03% github.com/Shopify/sarama.(*Broker).Open.func1
0 0% 100% 512.01kB 3.03% github.com/Shopify/sarama.(*Broker).registerHistogram
0 0% 100% 512.01kB 3.03% github.com/Shopify/sarama.(*Broker).registerMetrics
0 0% 100% 512.04kB 3.03% github.com/Shopify/sarama.(*consumerGroup).Consume |
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(pprof) web |
Adding a Benchmark
Profiling your Benchmark
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Profiling with Pprof
Profile CPU
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$ go tool pprof cpu.prof Type: cpu Time: Jul 15, 2022 at 1:25pm (EDT) Duration: 7.34s, Total samples = 7.45s (101.51%) Entering interactive mode (type "help" for commands, "o" for options) (pprof) |
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