This commit adds flags for profiling with runtime/pprof to storage
put:
- --cpuprofile: specify a path of CPU profiling result, if it is not
empty, profiling is activated
- --memprofile: specify a path of heap profiling result, if it is not
empty, profiling is activated
Of course, the flags should be added to RootCmd ideally. However,
adding common flags that shared by children command requires the
ongoing PR: https://github.com/spf13/cobra/pull/220 . Therefore this
commit adds the flags to storage put only.
Current etcd repository has a test for benchmarking a storage backend
in storage/kvstore_bench_test.go. However, it is hard to test various
parameters (e.g. batch interval, a number of keys, etc) with the test.
This commit adds a new benchmarking subcommand "storage" to
tools/benchmark. It will encourage analysis of storage backends with
various parameter and complex workloads.
Exmaple usage:
$ ./benchmark storage put
total: 9.894173792s
average: 9.894173ms
minimum latency: 6.596991ms
maximum latency: 29.455695ms
