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-rw-r--r--meta/lib/oeqa/buildperf/__init__.py1
-rw-r--r--meta/lib/oeqa/buildperf/base.py46
-rwxr-xr-xscripts/oe-build-perf-test4
3 files changed, 51 insertions, 0 deletions
diff --git a/meta/lib/oeqa/buildperf/__init__.py b/meta/lib/oeqa/buildperf/__init__.py
index c9535591e2a..bab122e4ec3 100644
--- a/meta/lib/oeqa/buildperf/__init__.py
+++ b/meta/lib/oeqa/buildperf/__init__.py
@@ -10,3 +10,4 @@
# more details.
#
"""Build performance tests"""
+from .base import KernelDropCaches
diff --git a/meta/lib/oeqa/buildperf/base.py b/meta/lib/oeqa/buildperf/base.py
new file mode 100644
index 00000000000..3cbdfa7818f
--- /dev/null
+++ b/meta/lib/oeqa/buildperf/base.py
@@ -0,0 +1,46 @@
+# Copyright (c) 2016, Intel Corporation.
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms and conditions of the GNU General Public License,
+# version 2, as published by the Free Software Foundation.
+#
+# This program is distributed in the hope it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+# more details.
+#
+"""Build performance test base classes and functionality"""
+from oeqa.utils.commands import runCmd
+
+
+class KernelDropCaches(object):
+ """Container of the functions for dropping kernel caches"""
+ sudo_passwd = None
+
+ @classmethod
+ def check(cls):
+ """Check permssions for dropping kernel caches"""
+ from getpass import getpass
+ from locale import getdefaultlocale
+ cmd = ['sudo', '-k', '-n', 'tee', '/proc/sys/vm/drop_caches']
+ ret = runCmd(cmd, ignore_status=True, data=b'0')
+ if ret.output.startswith('sudo:'):
+ pass_str = getpass(
+ "\nThe script requires sudo access to drop caches between "
+ "builds (echo 3 > /proc/sys/vm/drop_caches).\n"
+ "Please enter your sudo password: ")
+ cls.sudo_passwd = bytes(pass_str, getdefaultlocale()[1])
+
+ @classmethod
+ def drop(cls):
+ """Drop kernel caches"""
+ cmd = ['sudo', '-k']
+ if cls.sudo_passwd:
+ cmd.append('-S')
+ input_data = cls.sudo_passwd + b'\n'
+ else:
+ cmd.append('-n')
+ input_data = b''
+ cmd += ['tee', '/proc/sys/vm/drop_caches']
+ input_data += b'3'
+ runCmd(cmd, data=input_data)
diff --git a/scripts/oe-build-perf-test b/scripts/oe-build-perf-test
index 9fb431045b2..9589dee3acb 100755
--- a/scripts/oe-build-perf-test
+++ b/scripts/oe-build-perf-test
@@ -22,6 +22,7 @@ import sys
sys.path.insert(0, os.path.dirname(os.path.realpath(__file__)) + '/lib')
import scriptpath
scriptpath.add_oe_lib_path()
+from oeqa.buildperf import KernelDropCaches
from oeqa.utils.commands import runCmd
@@ -71,6 +72,9 @@ def main(argv=None):
if not pre_run_sanity_check():
return 1
+ # Check our capability to drop caches and ask pass if needed
+ KernelDropCaches.check()
+
return 0