Ethos-U PMU monitor
Add Python script demonstrating how to download performance data
from device.
Write baremetal PMU events to Event Recorder ring buffer and increase
the systick sample rate.
Change-Id: Ib73c56100a8de2d7b74c455d8f80cda0b59383da
diff --git a/scripts/ethosumonitor/outputs.py b/scripts/ethosumonitor/outputs.py
new file mode 100644
index 0000000..5a4101c
--- /dev/null
+++ b/scripts/ethosumonitor/outputs.py
@@ -0,0 +1,83 @@
+#
+# SPDX-FileCopyrightText: Copyright 2022 Arm Limited and/or its affiliates <open-source-office@arm.com>
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the License); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an AS IS BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+from .types import *
+from sys import stderr
+
+class OutputInterface:
+ def flush(self):
+ ...
+
+ def writeEventRecord(self, data: bytearray):
+ ...
+
+class OutputBinary(OutputInterface):
+ def __init__(self, fname):
+ self.file = open(fname, 'wb')
+
+ def flush(self):
+ self.file.flush()
+
+ def writeEventRecord(self, data: bytearray):
+ self.file.write(data)
+
+class OutputJson(OutputInterface):
+ def __init__(self, fname):
+ self.file = open(fname, 'w')
+
+ self.count = 0
+ self.nextId = 0
+ self.timestamp = 0
+ self.event = []
+
+ def flush(self):
+ self.file.flush()
+
+ def writeEventRecord(self, data: bytearray):
+ record = EventRecord_t(data)
+
+ if record.first():
+ # Drop messages that don't originate from Ethos-U
+ if record.component() != EventRecord_t.ETHOSU_CID:
+ return
+
+ self.nextId = 0
+ self.timestamp = record.timestamp
+ self.eventConfig = []
+ self.eventCount = []
+
+ messageIndex = record.message()
+
+ if self.nextId != messageIndex or self.timestamp != record.timestamp:
+ stderr.write(f'Expected record id {self.nextId} and timestamp {self.timestamp} but got {messageIndex} and {record.timestamp}. count={self.count}, locked={record.locked()}, valid={record.valid()}\n')
+ stderr.write(f'record={record}\n')
+ return
+
+ self.nextId = messageIndex + 1
+
+ if messageIndex == 0:
+ self.cycleCount = record.val2 << 32 | record.val1
+ elif messageIndex == 1:
+ self.qread = record.val1
+ self.status = record.val2
+ else:
+ self.eventConfig.append(record.val1)
+ self.eventCount.append(record.val2)
+
+ if record.last():
+ self.file.write(f'{{ "timestamp": {self.timestamp}, "qread": {self.qread}, "status": {self.status}, "cycleCount": {self.cycleCount}, "eventConfig": [ {", ".join(map(str, self.eventConfig))} ], "eventCount": [ {", ".join(map(str, self.eventCount))} ] }}\n')