$ go test -c
$ sudo ./perf.test -test.count=10
--- FAIL: TestCount (0.15s)
    --- FAIL: TestCount/Software (0.00s)
        --- FAIL: TestCount/Software/PageFaults (0.00s)
            count_test.go:104: PERF_EVENT_IOC_DISABLE: bad file descriptor
--- FAIL: TestCount (0.12s)
    --- FAIL: TestCount/Software (0.00s)
        --- FAIL: TestCount/Software/PageFaults (0.00s)
            count_test.go:104: PERF_EVENT_IOC_DISABLE: bad file descriptor
--- FAIL: TestReadRecord (0.24s)
    --- FAIL: TestReadRecord/Comm (0.05s)
        record_test.go:635: got context deadline exceeded, want valid record
--- FAIL: TestCount (0.11s)
    --- FAIL: TestCount/Software (0.00s)
        --- FAIL: TestCount/Software/PageFaults (0.00s)
            count_test.go:104: PERF_EVENT_IOC_DISABLE: bad file descriptor
    --- FAIL: TestCount/IoctlAndCountIDsMatch (0.02s)
        count_test.go:368: didn't see a page fault
--- FAIL: TestCount (0.09s)
    --- FAIL: TestCount/Software (0.00s)
        --- FAIL: TestCount/Software/PageFaults (0.00s)
            count_test.go:104: PERF_EVENT_IOC_DISABLE: bad file descriptor
    --- FAIL: TestCount/IoctlAndCountIDsMatch (0.02s)
        count_test.go:368: didn't see a page fault
--- FAIL: TestReadRecord (0.24s)
    --- FAIL: TestReadRecord/Comm (0.05s)
        record_test.go:635: got context deadline exceeded, want valid record
--- FAIL: TestCount (0.10s)
    --- FAIL: TestCount/Software (0.01s)
        --- FAIL: TestCount/Software/PageFaults (0.01s)
            count_test.go:104: PERF_EVENT_IOC_DISABLE: bad file descriptor
    --- FAIL: TestCount/IoctlAndCountIDsMatch (0.02s)
        count_test.go:368: didn't see a page fault
--- FAIL: TestReadRecord (0.25s)
    --- FAIL: TestReadRecord/Comm (0.05s)
        record_test.go:635: got context deadline exceeded, want valid record
--- FAIL: TestCount (0.09s)
    --- FAIL: TestCount/Software (0.00s)
        --- FAIL: TestCount/Software/PageFaults (0.00s)
            count_test.go:104: PERF_EVENT_IOC_DISABLE: bad file descriptor
    --- FAIL: TestCount/IoctlAndCountIDsMatch (0.01s)
        count_test.go:368: didn't see a page fault
--- FAIL: TestReadRecord (0.27s)
    --- FAIL: TestReadRecord/Comm (0.05s)
        record_test.go:635: got context deadline exceeded, want valid record
--- FAIL: TestCount (0.09s)
    --- FAIL: TestCount/Software (0.01s)
        --- FAIL: TestCount/Software/PageFaults (0.01s)
            count_test.go:104: PERF_EVENT_IOC_DISABLE: bad file descriptor
    --- FAIL: TestCount/IoctlAndCountIDsMatch (0.02s)
        count_test.go:368: didn't see a page fault
--- FAIL: TestReadRecord (0.30s)
    --- FAIL: TestReadRecord/Comm (0.05s)
        record_test.go:635: got context deadline exceeded, want valid record
--- FAIL: TestCount (0.09s)
    --- FAIL: TestCount/Software (0.01s)
        --- FAIL: TestCount/Software/PageFaults (0.01s)
            count_test.go:104: PERF_EVENT_IOC_DISABLE: bad file descriptor
    --- FAIL: TestCount/IoctlAndCountIDsMatch (0.02s)
        count_test.go:368: didn't see a page fault
--- FAIL: TestReadRecord (0.26s)
    --- FAIL: TestReadRecord/Comm (0.06s)
        record_test.go:635: got context deadline exceeded, want valid record
--- FAIL: TestCount (0.10s)
    --- FAIL: TestCount/Software (0.00s)
        --- FAIL: TestCount/Software/PageFaults (0.00s)
            count_test.go:104: PERF_EVENT_IOC_DISABLE: bad file descriptor
    --- FAIL: TestCount/IoctlAndCountIDsMatch (0.02s)
        count_test.go:368: didn't see a page fault
--- FAIL: TestReadRecord (0.28s)
    --- FAIL: TestReadRecord/Comm (0.05s)
        record_test.go:635: got context deadline exceeded, want valid record
FAIL