dpctl.get_devices does not return devices in the same order as sycl::device::get_devices

[oleksandr-pavlyk]

In [25]: d0 = dpctl.SyclDevice("gpu:0")

In [26]: d0.filter_string
Out[26]: 'opencl:gpu:0'

In [27]: [i for i, di in enumerate(dpctl.get_devices(dpctl.backend_type.all, dpctl.device_type.gpu)) if di == d0]
Out[27]: [1]

In [28]: d0 == dpctl.SyclDevice(d0.filter_string)
Out[28]: True


In [29]: d1 = dpctl.SyclDevice("gpu:1")

In [30]: d1.filter_string
Out[30]: 'level_zero:gpu:0'

In [31]: [i for i, di in enumerate(dpctl.get_devices(dpctl.backend_type.all, dpctl.device_type.gpu)) if di == d1]
Out[31]: [0]

In [32]: d1 == dpctl.SyclDevice(d1.filter_string)
Out[32]: True

At the same type, the C++ code does:

#include <CL/sycl.hpp>
#include <iostream>

int main(void) {
    sycl::ONEAPI::filter_selector fs0{"gpu:0"};
    sycl::device d0(fs0);
    std::cout << "Device0's driver version " << d0.get_info<sycl::info::device::driver_version>() <<std::endl;

    sycl::ONEAPI::filter_selector fs1{"gpu:1"};
    sycl::device d1(fs1);
    std::cout << "Device1's driver version " << d1.get_info<sycl::info::device::driver_version>() <<std::endl;

    std::vector<sycl::device> v = sycl::device::get_devices(sycl::info::device_type::gpu);

    for(size_t i=0; i < v.size(); ++i) {
        if (v[i] == d0) {
            std::cout << "Index for device0 is " << i <<std::endl;
        }
        if (v[i] == d1) {
            std::cout << "Index for device1 is " << i <<std::endl;
        }
    }

    return 0;
}

(idp) [08:32:27 nuc wd]$ dpcpp example.cpp && ./a.out
Device0's driver version 21.11.19310
Device1's driver version 1.0.19310
Index for device0 is 0
Index for device1 is 1