perftune.py: make sure config file existing before write

Currently if the config file to set mask is invalid, the script won't exit, and irq won't be set as expected. This patch added a sanity check before writing config file. Signed-off-by: Amos Kong <[email protected]> Message-Id: <fda5d5425c819252060b28e495ff94989d53fb2a.1526630708.git.amos@scylladb.com>
russpowers · May 24, 2018 · a8f5b85 · a8f5b85
1 parent 772ba66
commit a8f5b85
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/scripts/perftune.py b/scripts/perftune.py
@@ -51,6 +51,8 @@ def fwriteln_and_log(fname, line):
 double_commas_pattern = re.compile(',,')
 
 def set_one_mask(conf_file, mask):
+    if not os.path.exists(conf_file):
+        raise Exception("Configure file to set mask doesn't exist: {}".format(conf_file))
     mask = re.sub('0x', '', mask)
 
     while double_commas_pattern.search(mask):