On 8/24/20 5:09 AM, Dmitry Shulyak wrote: > library that i am using https://github.com/dshulyak/uring > It requires golang 1.14, if installed, benchmark can be run with: > go test ./fs -run=xx -bench=BenchmarkReadAt/uring_8 -benchtime=1000000x > go test ./fs -run=xx -bench=BenchmarkReadAt/uring_5 -benchtime=8000000x > > note that it will setup uring instance per cpu, with shared worker pool. > it will take me too much time to implement repro in c, but in general > i am simply submitting multiple concurrent > read requests and watching read rate. I'm fine with trying your Go version, but I can into a bit of trouble: axboe@amd ~/g/go-uring (master)> go test ./fs -run=xx -bench=BenchmarkReadAt/uring_8 -benchtime=1000000x # github.com/dshulyak/uring/fixed fixed/allocator.go:38:48: error: incompatible type for field 2 in struct construction (cannot use type uint64 as type syscall.Iovec_len_t) 38 | iovec := []syscall.Iovec{{Base: &mem[0], Len: uint64(size)}} | ^ FAIL github.com/dshulyak/uring/fs [build failed] FAIL axboe@amd ~/g/go-uring (master)> go version go version go1.14.6 gccgo (Ubuntu 10.2.0-5ubuntu1~20.04) 10.2.0 linux/amd64 -- Jens Axboe
