experiments: add farmem experiment

This adds the physical memory region to the kernel memory manager in a second
(emulated) numa node.

experiments/pyexps/farmem.py

+# Copyright 2021 Max Planck Institute for Software Systems, and
+# National University of Singapore
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+import simbricks.orchestration.experiments as exp
+import simbricks.orchestration.nodeconfig as nodec
+import simbricks.orchestration.simulators as sim
+
+experiments = []
+
+
+class FarMemTest(nodec.AppConfig):
+
+    def __init__(self, addr, size):
+        self.addr = addr
+        self.size = size
+
+    # pylint: disable=consider-using-with
+    def config_files(self):
+        m = {'farmem.ko': open('../images/farmem/farmem.ko', 'rb')}
+        return {**m, **super().config_files()}
+
+    def run_cmds(self, node):
+        return [
+            'mount -t proc proc /proc',
+            'mount -t sysfs sysfs /sys',
+            'free -m',
+            (
+                f'insmod /tmp/guest/farmem.ko base_addr=0x{self.addr:x} '
+                f'size=0x{self.size:x} nnid=1 drain_node=1'
+            ),
+            'free -m',
+            'numactl -H',
+            'sleep 2'
+        ]
+
+
+for h in ['gk']:
+    e = exp.Experiment('farmem-' + h)
+    e.checkpoint = False
+
+    mem = sim.BasicMemDev()
+    mem.name = 'mem0'
+    mem.addr = 0x2000000000  #0x2000000000000000
+
+    node_config = nodec.NodeConfig()
+    node_config.mem = 512
+    node_config.nockp = True
+    node_config.kcmd_append += 'numa=fake=2'
+    node_config.app = FarMemTest(mem.addr, mem.size)
+
+    if h == 'gk':
+        host = sim.Gem5Host(node_config)
+        host.cpu_type = 'X86KvmCPU'
+        host.variant = 'opt'
+    elif h == 'qk':
+        host = sim.QemuHost(node_config)
+    host.name = 'host.0'
+    e.add_host(host)
+    host.wait = True
+
+    e.add_memdev(mem)
+
+    host.add_memdev(mem)
+
+    experiments.append(e)