recommend: added support for matching of processes

E.g.:

[myprofile]
process=myprocess1
process2=myprocess2.*

The myprofile will be recommended if there are 'myprocess1' and
'myprocess2.*' (e.g. myprocess2, myprocess21, myprocess2_whatever)
running.

Resolves: rhbz#1461838

Signed-off-by: Jaroslav Škarvada <jskarvad@redhat.com>

recommend.conf

@@ -1,14 +1,23 @@
 # Tuned rules for recommend_profile.
 #
-# The 'virt' RE matches virt-what output.
-# The 'system' RE matches content of /etc/system-release-cpe.
+# Syntax:
+# [PROFILE1]
+# KEYWORD11=RE11
+# KEYWORD21=RE12
 #
-# If the parameter starts with '/' it means path to file which content is
-# checked, e.g.:
-# /etc/passwd=.+
-# If file doesn't exist, its RE will not match.
-#
-# Al 'virt', 'system' and files have to match for profile to match.
+# [PROFILE2]
+# KEYWORD21=RE21
+# KEYWORD22=RE22
+
+# KEYWORD can be:
+# virt    - for RE to match output of virt-what
+# system  - for RE to match content of /etc/system-release-cpe
+# process - for RE to match running processes. It can have arbitrary suffix, all
+#           process* lines have to match for the PROFILE to match (i.e. the AND operator)
+# /FILE   - for RE to match content of the FILE, e.g.: '/etc/passwd=.+'. If file doesn't
+            exist, its RE will not match.
+
+# All REs for all KEYWORDs have to match for PROFILE to match (i.e. the AND operator).
 # If 'virt' or 'system' is not specified, it matches for every string.
 # If 'virt' or 'system' is empty, i.e. 'virt=', it matches only empty string (alias for '^$').
 # If several profiles matched, the first match is taken.

tuned/utils/commands.py

@@ -6,6 +6,7 @@
 import tuned.consts as consts
 from configobj import ConfigObj, ConfigObjError
 import re
+import procfs
 from subprocess import *
 
 log = tuned.logs.get()
@@ -387,6 +388,11 @@ def recommend_profile(self, hardcoded = False):
 						elif option[0] == "/":
 							if not os.path.exists(option) or not re.match(value, self.read_file(option), re.S):
 								match = False
+						elif option[0:7] == "process":
+							ps = procfs.pidstats()
+							ps.reload_threads()
+							if len(ps.find_by_regex(re.compile(value))) == 0:
+								match = False
 					if match:
 						# remove the ",.*" suffix
 						profile = r.sub("", section)