anonymous_namespace{device_health_probe.cpp} Namespace Reference

Functions
DeviceProbeSample	take_sample (DiskReader &reader, uint64_t offset, size_t size)
std::string	health_to_string (DeviceHealthState state)

Function Documentation

health_to_string()

std::string anonymous_namespace{device_health_probe.cpp}::health_to_string

(

DeviceHealthState

state

)

Definition at line 26 of file device_health_probe.cpp.

                                                    {
    switch (state) {
        case DeviceHealthState::Healthy: return "Healthy";
        case DeviceHealthState::ReadableWithErrors: return "Readable with errors";
        case DeviceHealthState::PartiallyReadable: return "Partially readable";
        case DeviceHealthState::EnumeratedButUnstable: return "Enumerated but unstable";
        case DeviceHealthState::NotReadable: return "Not readable";
    }
    return "Unknown";
}

References EnumeratedButUnstable, health_to_string(), Healthy, NotReadable, PartiallyReadable, and ReadableWithErrors.

Referenced by health_to_string().

take_sample()

DeviceProbeSample anonymous_namespace{device_health_probe.cpp}::take_sample	(	DiskReader &	reader,
		uint64_t	offset,
		size_t	size )

Definition at line 10 of file device_health_probe.cpp.

                                                                                {
    DeviceProbeSample sample;
    sample.offset = offset;
    sample.size = size;
    std::array<unsigned char, 4096> buffer{};
    const size_t to_read = std::min<size_t>(size, buffer.size());
    const auto start = std::chrono::steady_clock::now();
    sample.success = reader.read_at(offset, buffer.data(), to_read);
    sample.latency_ms = static_cast<uint64_t>(std::chrono::duration_cast<std::chrono::milliseconds>(
        std::chrono::steady_clock::now() - start).count());
    if (!sample.success) {
        sample.error = "read failed";
    }
    return sample;
}

References DeviceProbeSample::error, DeviceProbeSample::latency_ms, DeviceProbeSample::offset, DiskReader::read_at(), DeviceProbeSample::size, DeviceProbeSample::success, and take_sample().

Referenced by take_sample().