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import subprocess
import test
import pytest
from priority import PRIORITY_HIGH

class TestRdtsetAffinity(test.Test):

    ## @cond
    @pytest.fixture(autouse=True)
    def init(self, request):
        super().init(request)
        yield
        super().fini()
    ## @endcond


    ## RDTSET - Set CPU affinity single core (command)
    #
    #  \b Priority: High
    #
    #  \b Objective:
    #  CPU affinity for command is set to single CPU
    #
    #  \b Instruction:
    #  1. Run the "rdtset [-I] -c 4 memtester 10M" to set cpu affinity
    #  2. Verify affinity with "taskset -p <memtester pid>" command
    #  3. Terminate memtester process
    #
    #  \b Result:
    #  Observe "current affinity mask: 10" in taskset output
    @PRIORITY_HIGH
    @pytest.mark.rdt_supported("rdt_a")
    def test_rdtset_affinity_command_single_core(self, iface):
        command = self.cmd_rdtset(iface, "-c 4 memtester 10M")
        with subprocess.Popen(command.split(), stdin=subprocess.PIPE,
                              stdout=subprocess.PIPE) as rdtset:

            self.stdout_wait(rdtset, b"memtester version")

            child = self.get_pid_children(rdtset.pid)
            assert len(child) == 1

            (stdout, _, exitstatus) = self.run(f"taskset -p {child[0]}")
            assert exitstatus == 0
            assert "current affinity mask: 10" in stdout

            self.run("killall memtester")
            rdtset.communicate()


    ## RDTSET - Set CPU affinity multiple cores (command)
    #
    #  \b Priority: High
    #
    #  \b Objective:
    #  CPU affinity for command is set to CPU group
    #
    #  \b Instruction:
    #  1. Run the "rdtset [-I] -c 4-5 memtester 10M" to set cpu affinity
    #  2. Verify affinity with "taskset -p <memtester pid>" command
    #  3. Terminate memtester process
    #
    #  \b Result:
    #  Observe "current affinity mask: 30" in taskset output
    @PRIORITY_HIGH
    @pytest.mark.rdt_supported("rdt_a")
    def test_rdtset_affinity_command_multiple_cores(self, iface):
        command = self.cmd_rdtset(iface, "-c 4-5 memtester 10M")
        with subprocess.Popen(command.split(), stdin=subprocess.PIPE,
                              stdout=subprocess.PIPE) as rdtset:

            self.stdout_wait(rdtset, b"memtester version")

            child = self.get_pid_children(rdtset.pid)
            assert len(child) == 1

            (stdout, _, exitstatus) = self.run(f"taskset -p {child[0]}")
            assert exitstatus == 0
            assert "current affinity mask: 30" in stdout

            self.run("killall memtester")
            rdtset.communicate()


    ## RDTSET - Set CPU affinity single core (task)
    #
    #  \b Priority: High
    #
    #  \b Objective:
    #  CPU affinity for command is set to single CPU
    #
    #  \b Instruction:
    #  1. Run the "rdtset [-I] -c 4 -p 1" to set cpu affinity
    #  2. Verify affinity with "taskset -p 1" command
    #
    #  \b Result:
    #  Observe "current affinity mask: 10" in taskset output
    @PRIORITY_HIGH
    @pytest.mark.rdt_supported("rdt_a")
    def test_rdtset_affinity_task_single_core(self, iface):
        (_, _, exitstatus) = self.run_rdtset(iface, "-c 4 -p 1")
        assert exitstatus == 0

        (stdout, _, exitstatus) = self.run("taskset -p 1")
        assert exitstatus == 0
        assert "current affinity mask: 10" in stdout


    ## RDTSET - Set CPU affinity multiple cores (task)
    #
    #  \b Priority: High
    #
    #  \b Objective:
    #  CPU affinity for command is set to single CPU
    #
    #  \b Instruction:
    #  1. Run the "rdtset [-I] -c 4-5 -p 1" to set cpu affinity
    #  2. Verify affinity with "taskset -p 1" command
    #
    #  \b Result:
    #  Observe "current affinity mask: 10" in taskset output
    @PRIORITY_HIGH
    @pytest.mark.rdt_supported("rdt_a")
    def test_rdtset_affinity_task_multiple_cores(self, iface):
        (_, _, exitstatus) = self.run_rdtset(iface, "-c 4-5 -p 1")
        assert exitstatus == 0

        (stdout, _, exitstatus) = self.run("taskset -p 1")
        assert exitstatus == 0
        assert "current affinity mask: 30" in stdout
