what if this were to work now

src/extract_rdcosts.py

@@ -123,7 +123,6 @@ def run_job(job):
 
     with open(logpath, "w") as lf:
         with MultiPipeGZOutManager(odpath, dest_qps) as pipes_and_outputs:
-            gzips = []
             gzip_threads = []
             for pipe_fn, out_fn in pipes_and_outputs.items():
                 gzip_thread = threading.Thread(target=do_gzip, args=(pipe_fn, out_fn))
@@ -131,10 +130,7 @@ def run_job(job):
                 gzip_threads.append(gzip_thread)
 
             kvz = subprocess.Popen(my_kvzargs, env=kvzenv, stderr=lf)
-
+            kvz.wait()
-            kvz.communicate()
-            for gzip in gzips:
-                gzip.communicate()
 
 def threadfunc(joblist):
     for job in joblist:

src/filter_rdcosts.c

@@ -121,6 +121,7 @@ int process_rdcosts(FILE *in, FILE *out)
     }
     printf("\n");
   }
+  fflush(stdout);
 
 out:
   free(buf);

src/run_filter.py

@@ -1,20 +1,56 @@
 #!/usr/bin/env python3
 
 import glob
+import gzip
 import os
+import re
 import subprocess
+import sys
 import tempfile
 import threading
 import time
 
 n_threads   = 8
-data        = "/home/moptim/rdcost/data/*.gz"
+datadirs    = "/tmp/rdcost/data/"
+#datadirs    = "/tmp/rdcost/data/RaceHorses_416x240_30.yuv-qp23/"
 gzargs      = ["gzip", "-d"]
 filtargs    = ["./frcosts_matrix"]
 octargs     = ["octave-cli", "invert_matrix.m"]
 filt2args   = ["./ols_2ndpart"]
 resultdir   = os.path.join("/tmp", "rdcost", "coeff_buckets")
 
+gz_glob     = "[0-9][0-9].txt.gz"
+
+class MultiPipeManager:
+    pipe_fn_template  = "%02i.txt"
+
+    def __init__(self, odpath, dest_qps):
+        self.odpath = odpath
+        self.dest_qps = dest_qps
+
+        self.pipe_fns  = []
+        for qp in dest_qps:
+            pipe_fn  = os.path.join(self.odpath, self.pipe_fn_template % qp)
+            self.pipe_fns.append(pipe_fn)
+
+    def __enter__(self):
+        os.makedirs(self.odpath, exist_ok=True)
+        for pipe_fn in self.pipe_fns:
+            try:
+                os.unlink(pipe_fn)
+            except FileNotFoundError:
+                pass
+            os.mkfifo(pipe_fn)
+        return self
+
+    def __exit__(self, *_):
+        for pipe_fn in self.pipe_fns:
+            os.unlink(pipe_fn)
+
+    def items(self):
+        for pipe_fn in self.pipe_fns:
+            yield pipe_fn
+
 class MTSafeIterable:
     def __init__(self, iterable):
         self.lock = threading.Lock()
@@ -27,40 +63,82 @@ class MTSafeIterable:
         with self.lock:
             return next(self.iterable)
 
-def run_job(job):
+def read_in_blocks(f):
-    datapath   = job
+    BLOCK_SZ = 65536
-    resultpath = os.path.join(resultdir, os.path.basename(job) + ".result")
+    while True:
+        block = f.read(BLOCK_SZ)
+        if (len(block) == 0):
+            break
+        else:
+            yield block
 
-    print("Running job %s" % datapath)
+def exhaust_gzs(sink_f, gzs):
+    for gz in gzs:
+        with gzip.open(gz, "rb") as f:
+            if (gz == "/tmp/rdcost/data/RaceHorses_416x240_30.yuv-qp22/20.txt.gz"):
+                print("kjeh")
+            print("  Doing %s ..." % gz)
+            for block in read_in_blocks(f):
+                sink_f.write(block)
+                sink_f.flush()
+
+def run_job(jobname, input_gzs):
+    resultpath = os.path.join(resultdir, "%s.result" % jobname)
+    print("Running job %s" % jobname)
 
-    with open(resultpath, "w") as rf:
     with tempfile.NamedTemporaryFile() as tf:
-            with open(datapath, "rb") as df:
+        filt = subprocess.Popen(filtargs, stdin=subprocess.PIPE, stdout=subprocess.PIPE)
-                f2a = list(filt2args)
-                f2a.append(tf.name)
-                gzip = subprocess.Popen(gzargs, stdin=df, stdout=subprocess.PIPE)
-                filt = subprocess.Popen(filtargs, stdin=gzip.stdout, stdout=subprocess.PIPE)
         octa = subprocess.Popen(octargs, stdin=filt.stdout, stdout=tf)
 
-                octa.communicate()
+        try:
-                filt.communicate()
+            exhaust_gzs(filt.stdin, input_gzs)
-                gzip.communicate()
+        except OSError as e:
+            print("OSError %s" % e, file=sys.stderr)
+            raise
 
-            with open(datapath, "rb") as df:
+        filt.stdin.close()
-                gz2  = subprocess.Popen(gzargs, stdin=df, stdout=subprocess.PIPE)
+        filt.wait()
-                f2   = subprocess.Popen(f2a, stdin=gz2.stdout, stdout=rf)
+        octa.wait()
 
+        if (filt.returncode != 0):
+            print("First stage failed: %s" % jobname, file=sys.stderr)
+            assert(0)
+
+        with open(resultpath, "w") as rf:
+            f2a = filt2args + [tf.name]
+            f2 = subprocess.Popen(f2a, stdin=subprocess.PIPE, stdout=rf)
+            exhaust_gzs(f2.stdin, input_gzs)
             f2.communicate()
-                gz2.communicate()
+            if (filt.returncode != 0):
+                print("Second stage failed: %s" % jobname, file=sys.stderr)
+                assert(0)
 
-    print("Job %s done" % datapath)
+    print("Job %s done" % jobname)
 
 def threadfunc(joblist):
-    for job in joblist:
+    for jobname, job in joblist:
-        run_job(job)
+        run_job(jobname, job)
+
+def scan_datadirs(path):
+    seq_names = set()
+    for dirent in os.scandir(path):
+        if (not dirent.is_dir()):
+            continue
+        match = re.search("^([A-Za-z0-9_]+\.yuv)-qp[0-9]{1,2}$", dirent.name)
+        if (not match is None):
+            seq_name = match.groups()[0]
+            seq_names.add(seq_name)
+
+    for seq_name in seq_names:
+        seq_glob = os.path.join(path, seq_name + "-qp*/")
+
+        for qp in range(51):
+            job_name = seq_name + "-qp%02i" % qp
+            qp_fn = "%02i.txt.gz" % qp
+            yield job_name, glob.glob(os.path.join(seq_glob, qp_fn))
 
 def main():
-    jobs = glob.glob(data)
+    jobs = scan_datadirs(datadirs)
     joblist = MTSafeIterable(iter(jobs))
 
     threads = [threading.Thread(target=threadfunc, args=(joblist,)) for _ in range(n_threads)]