Fix various problems in opcontrol
Support multiple CPU types in opcontrol
Use access(2) instead of opening files where possible
Mount /dev/oprofile at startup
Disable oprofiled when resetting current data session
Change-Id: Ifd0ff2a50c9229af01249aefd5cd9dce00c58bf4
diff --git a/opev.py b/opev.py
new file mode 100755
index 0000000..9f11e75
--- /dev/null
+++ b/opev.py
@@ -0,0 +1,84 @@
+#! /usr/bin/env python
+"""
+Read oprofile events file, generate C data struct for Android opcontrol.
+
+Android does not use script for opcontrol, they use a C binary, which
+has embedded data structures with the event set that is supported.
+Initially that is just Arm V6 and V7.
+
+This tool allows us to convert various MIPS cpu event files for
+inclusion, and should work with other processor arch's as well.
+
+Neither Arm or Mips uses unit_masks, so that file is ignored.
+
+Event entries in file look like this:
+
+ event:0x1 counters:0,1 um:zero minimum:500 name:INSTRUCTIONS : Instructions completed
+
+The format is key:value. A single : appears at the end of line
+and the remaining text is the description
+"""
+
+import os, sys
+
+def number(s):
+ if s == 'zero':
+ return '0'
+ if s == 'one':
+ return '1'
+ if s[0] == 'x':
+ return '0'+s
+
+def parse_event(line,ovf):
+ ''' return dictionary of items from one line of event file '''
+ dict = {}
+ fields = line.split(None, 1)
+ while (fields):
+ first = fields[0].split(':', 1)
+ if first[0] == 'include':
+ ev(first[1] + "/events", ovf)
+ return None
+ line = fields[1]
+ if first[0] == 'um':
+ first[1] = number(first[1])
+ if first[0] == '':
+ dict['description'] = fields[1]
+ fields = None;
+ else:
+ dict[first[0]] = first[1]
+ fields = line.split(None, 1)
+ return dict
+
+def parse_ctr(s):
+ ''' convert comma separated list of integers x,y,... , to CTR(x) | CTR(y) | ... '''
+ if s == 'cpuid':
+ return 0
+ ctrs = s.split(',')
+ c = ''
+ for i in range(len(ctrs)-1):
+ c += ("CTR(%s) | " % ctrs[i])
+ c += ("CTR(%s)" % ctrs[-1])
+ return c
+
+def ev(fname,ovf):
+ ''' read file, parse, generate C data struct to file ovf '''
+ evf = open(fname, "r")
+ all_lines = evf.readlines()
+ lines = [s.strip() for s in all_lines if s.strip()] # strip blanks
+ lines = [s for s in lines if not s.startswith('#')] # strip comments
+ eventlist = [parse_event(line,ovf) for line in lines]
+
+ ovf.write("// events from file %s\n" % fname)
+ for d in eventlist:
+ if d!=None:
+ ovf.write(' {%s, %s, %s, "%s",\n' % (d['event'], parse_ctr(d['counters']), d['um'], d['name']))
+ ovf.write(' "%s"},\n' % d['description'])
+
+
+if __name__ == "__main__" :
+ if len(sys.argv) != 2:
+ fname = "events/mips/24K/events" # convenient testing
+ else:
+ fname = sys.argv[1]
+ ovf = open(fname + ".h", "w")
+ ev(fname, ovf)