In order to get kvm stats during the kvm tests execution,
a new profiler was created, kvm_stat. It's a simple profiler
that keeps an instance of the kvm_stat program running
during the test's execution, writing results on the profiling
directory.
Signed-off-by: Lucas Meneghel Rodrigues <lmr@xxxxxxxxxx>
---
client/profilers/kvm_stat/kvm_stat.py | 61 +++++++++++++++++++++++++++++++++
1 files changed, 61 insertions(+), 0 deletions(-)
create mode 100644 client/profilers/kvm_stat/__init__.py
create mode 100644 client/profilers/kvm_stat/kvm_stat.py
diff --git a/client/profilers/kvm_stat/__init__.py b/client/profilers/kvm_stat/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/client/profilers/kvm_stat/kvm_stat.py b/client/profilers/kvm_stat/kvm_stat.py
new file mode 100644
index 0000000..b2c0b32
--- /dev/null
+++ b/client/profilers/kvm_stat/kvm_stat.py
@@ -0,0 +1,61 @@
+"""
+kvm_stat prints statistics generated by the kvm module.
+It depends on debugfs. If no debugfs is mounted, the profiler
+will try to mount it so it's possible to proceed.
+
+@copyright: Red Hat 2010
+@author: Lucas Meneghel Rodrigues (lmr@xxxxxxxxxx)
+"""
+import time, os, subprocess, commands
+from autotest_lib.client.bin import utils, profiler, os_dep
+
+
+class kvm_stat(profiler.profiler):
+ """
+ kvm_stat based profiler. Consists on executing kvm_stat -l during a given
+ test execution, redirecting its output to a file on the profile dir.
+ """
+ version = 1
+ def initialize(self):
+ """
+ Gets path of kvm_stat and verifies if debugfs needs to be mounted.
+ """
+ self.stat_path = os_dep.command('kvm_stat')
+ (ret, output) = commands.getstatusoutput("%s --batch" % self.stat_path)
+ if ret != 0:
+ if 'debugfs' in output:
+ utils.system('mount -t debugfs debugfs /sys/kernel/debug')
+ else:
+ raise error.AutotestError('kvm_stat failed due to an '
+ 'unknown reason: %s' % output)
+
+
+ def start(self, test):
+ """
+ Starts kvm_stat subprocess.
+
+ @param test: Autotest test on which this profiler will operate on.
+ """
+ cmd = "%s -l" % self.stat_path
+ logfile = open(os.path.join(test.profdir, "kvm_stat"), 'w')
+ p = subprocess.Popen(cmd, shell=True, stdout=logfile,
+ stderr=subprocess.STDOUT)
+ self.pid = p.pid
+
+
+ def stop(self, test):
+ """
+ Stops profiler execution by sending a SIGTERM to kvm_stat process.
+
+ @param test: Autotest test on which this profiler will operate on.
+ """
+ os.kill(self.pid, 15)
+
+
+ def report(self, test):
+ """
+ Report function. Does nothing as there's no postprocesing needed.
+
+ @param test: Autotest test on which this profiler will operate on.
+ """
+ return None
--
1.6.5.2
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