polish testing a bit further

test-boot

@@ -8,7 +8,7 @@ class Main(common.TestCliFunction):
     def __init__(self):
         super().__init__(
             description='''\
-Run Linux kernel boot tests and benchmarks.
+Test and benchmark the Linux kernel boot. Use inits that exit immediately.
 '''
         )
         self.add_argument(
@@ -16,11 +16,7 @@ Run Linux kernel boot tests and benchmarks.
             default=1,
             type=int,
             help='''\
-Size of the tests to run. Scale:
-
-* 1: a few seconds and important
-* 2: < 5 minutes and important or a few seconds and not too important
-* 3: all
+See ./test --help for --size.
 '''
         )
 
@@ -64,7 +60,10 @@ Size of the tests to run. Scale:
             self._bench(trace='exec_tb')
         if self.env['emulator'] == 'gem5' and self.env['size'] >= 3:
             if self.env['arch'] == 'x86_64':
-                cpu_types = ['DerivO3CPU']
+                cpu_types = [
+                    # TODO segfault
+                    #'DerivO3CPU'
+                ]
             elif self.env['is_arm']:
                 cpu_types = [
                     'DerivO3CPU',
@@ -86,7 +85,8 @@ Size of the tests to run. Scale:
                 # Do a fuller testing for aarch64.
                 for build_type in ['debug', 'fast']:
                     self._bench(gem5_build_type=build_type)
-                self._bench(gem5_script='biglittle')
+                # Requires patching the executable.
+                # self._bench(gem5_script='biglittle')
 
 if __name__ == '__main__':
     Main().cli_exit()