| """ |
| Loads KVM virtualization kernel module before a test cycle and unloads it after. |
| Intended to help in qualifying KVM in the kernel by comparing runs of kernel |
| tests with and without this "profiler". |
| |
| author: jsmiller@google.com |
| """ |
| |
| import os, subprocess |
| from autotest_lib.client.bin import kvm_control, profiler, utils |
| |
| |
| class kvm_modload(profiler.profiler): |
| version = 4 |
| |
| |
| def initialize(self, interval=None, options=None): |
| pass |
| |
| |
| def log_lsmod(self, log): |
| log.write("lsmod: \n") |
| cmd_status = utils.run("lsmod") |
| if cmd_status.stdout: |
| log.write(cmd_status.stdout) |
| log.write("\n") |
| if cmd_status.stderr: |
| log.write(cmd_status.stderr) |
| log.write("\n") |
| |
| |
| def start(self, test): |
| load_status = kvm_control.load_kvm() |
| self.logfile = open(os.path.join(test.profdir, "kvm_modload"), 'w') |
| self.logfile.write("Loaded KVM module with status %s.\n" % |
| repr(load_status)) |
| self.log_lsmod(self.logfile) |
| |
| |
| def stop(self, test): |
| unload_status = kvm_control.unload_kvm() |
| self.logfile.write("Unloaded KVM module with status %s.\n" % |
| repr(unload_status)) |
| self.log_lsmod(self.logfile) |
| self.logfile.close() |
| |
| |
| def report(self, test): |
| output = os.path.join(test.profdir, "kvm_modload") |
