pybootchartgui: make the build profiling in pictures

The original patch is from Richard, I rebased it to the up-to-date
upstream code, here are the original messages from him:

We have just merged Beth's initial buildstats logging work. I was
sitting wondering how to actually evaluate the numbers as I wanted to
know "where are we spending the time?".

It occurred to me that I wanted a graph very similar to that generated
by bootchart. I looked around and found pyboootchartgui and then hacked
it around a bit and coerced it to start producing charts like:

http://tim.rpsys.net/bootchart.png

which is the initial "pseudo-native" part of the build. This was simple
enough to test with.

I then tried graphing a poky-image-sato. To get a graph I could actually
read, I stripped out any task taking less than 8 seconds and scaled the
x axis from 25 units per second to one unit per second. The result was:

http://tim.rpsys.net/bootchart2.png
(warning this is a 2.7MB png)

I also added in a little bit of colour coding for the second chart.
Interestingly it looks like there is more yellow than green meaning
configure is a bigger drain on the build time not that its
unexpected :/.

I quite enjoyed playing with this and on a serious note, the gradient of
the task graph makes me a little suspicious of whether the overhead of
launching tasks in bitbake itself is having some effect on build time.
Certainly on the first graph there are some interesting latencies
showing up.

Anyhow, I think this is the first time bitbake's task execution has been
visualised and there are some interesting things we can learn from it.
I'm hoping this is a start of a much more detailed understanding of the
build process with respect to performance.

[YOCTO #2403]

(From OE-Core rev: 6ea0c02d0db08f6b4570769c6811ecdb051646ad)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 26 insertions, 21 deletions

diff --git a/scripts/pybootchartgui/pybootchartgui/parsing.py b/scripts/pybootchartgui/pybootchartgui/parsing.py
index a350a3eb08..11a082941c 100644
--- a/scripts/pybootchartgui/pybootchartgui/parsing.py
+++ b/scripts/pybootchartgui/pybootchartgui/parsing.py
@@ -160,34 +160,39 @@ def get_num_cpus(headers):
 
 class ParserState:
     def __init__(self):
-        self.headers = None
-        self.disk_stats = None
-        self.ps_stats = None
-        self.cpu_stats = None
+        self.processes = {}
+        self.start = {}
+        self.end = {}
 
     def valid(self):
-        return self.headers != None and self.disk_stats != None and self.ps_stats != None and self.cpu_stats != None
+        return len(self.processes) != 0
 
 
 _relevant_files = set(["header", "proc_diskstats.log", "proc_ps.log", "proc_stat.log"])
 
-def _do_parse(state, name, file):
-    if name == "header":
-        state.headers = _parse_headers(file)
-    elif name == "proc_diskstats.log":
-        state.disk_stats = _parse_proc_disk_stat_log(file, get_num_cpus(state.headers))
-    elif name == "proc_ps.log":
-        state.ps_stats = _parse_proc_ps_log(file)
-    elif name == "proc_stat.log":
-        state.cpu_stats = _parse_proc_stat_log(file)
+def _do_parse(state, filename, file):
+    #print filename
+    #writer.status("parsing '%s'" % filename)
+    paths = filename.split("/")
+    task = paths[-1]
+    pn = paths[-2]
+    start = None
+    end = None
+    for line in file:
+        if line.startswith("Started:"):
+            start = int(float(line.split()[-1]))
+        elif line.startswith("Ended:"):
+            end = int(float(line.split()[-1]))
+    if start and end and (end - start) > 8:
+        state.processes[pn + ":" + task] = [start, end]
+        state.start[start] = pn + ":" + task
+        state.end[end] = pn + ":" + task
     return state
 
 def parse_file(state, filename):
     basename = os.path.basename(filename)
-    if not(basename in _relevant_files):
-        return state
     with open(filename, "rb") as file:
-        return _do_parse(state, basename, file)
+        return _do_parse(state, filename, file)
 
 def parse_paths(state, paths):
     for path in paths:
@@ -196,7 +201,7 @@ def parse_paths(state, paths):
             print "warning: path '%s' does not exist, ignoring." % path
             continue
         if os.path.isdir(path):
-            files = [ f for f in [os.path.join(path, f) for f in os.listdir(path)] if os.path.isfile(f) ]
+            files = [ f for f in [os.path.join(path, f) for f in os.listdir(path)] ]
             files.sort()
             state = parse_paths(state, files)
         elif extension in [".tar", ".tgz", ".tar.gz"]:
@@ -218,6 +223,6 @@ def parse(paths, prune):
     state = parse_paths(ParserState(), paths)
     if not state.valid():
         raise ParseError("empty state: '%s' does not contain a valid bootchart" % ", ".join(paths))
-    monitored_app = state.headers.get("profile.process")
-    proc_tree = ProcessTree(state.ps_stats, monitored_app, prune)
-    return (state.headers, state.cpu_stats, state.disk_stats, proc_tree)
+    #monitored_app = state.headers.get("profile.process")
+    #proc_tree = ProcessTree(state.ps_stats, monitored_app, prune)
+    return state