diff --git a/copyparty/__main__.py b/copyparty/__main__.py
index a48f47de..93a2aad5 100644
--- a/copyparty/__main__.py
+++ b/copyparty/__main__.py
@@ -23,7 +23,7 @@ from textwrap import dedent
 from .__init__ import E, WINDOWS, VT100, PY2, unicode
 from .__version__ import S_VERSION, S_BUILD_DT, CODENAME
 from .svchub import SvcHub
-from .util import py_desc, align_tab, IMPLICATIONS, alltrace
+from .util import py_desc, align_tab, IMPLICATIONS
 
 HAVE_SSL = True
 try:
@@ -191,16 +191,6 @@ def sighandler(sig=None, frame=None):
     print("\n".join(msg))
 
 
-def stackmon(fp, ival):
-    ctr = 0
-    while True:
-        ctr += 1
-        time.sleep(ival)
-        st = "{}, {}\n{}".format(ctr, time.time(), alltrace())
-        with open(fp, "wb") as f:
-            f.write(st.encode("utf-8", "replace"))
-
-
 def run_argparse(argv, formatter):
     ap = argparse.ArgumentParser(
         formatter_class=formatter,
@@ -346,6 +336,7 @@ def run_argparse(argv, formatter):
     ap2.add_argument("--no-fastboot", action="store_true", help="wait for up2k indexing")
     ap2.add_argument("--no-htp", action="store_true", help="disable httpserver threadpool, create threads as-needed instead")
     ap2.add_argument("--stackmon", metavar="P,S", type=u, help="write stacktrace to Path every S second")
+    ap2.add_argument("--log-thrs", metavar="SEC", type=float, help="list active threads every SEC")
     
     return ap.parse_args(args=argv[1:])
     # fmt: on
@@ -385,16 +376,6 @@ def main(argv=None):
     except AssertionError:
         al = run_argparse(argv, Dodge11874)
 
-    if al.stackmon:
-        fp, f = al.stackmon.rsplit(",", 1)
-        f = int(f)
-        t = threading.Thread(
-            target=stackmon,
-            args=(fp, f),
-        )
-        t.daemon = True
-        t.start()
-
     # propagate implications
     for k1, k2 in IMPLICATIONS:
         if getattr(al, k1):
diff --git a/copyparty/svchub.py b/copyparty/svchub.py
index c72f1fac..5c35b553 100644
--- a/copyparty/svchub.py
+++ b/copyparty/svchub.py
@@ -11,7 +11,7 @@ from datetime import datetime, timedelta
 import calendar
 
 from .__init__ import E, PY2, WINDOWS, MACOS, VT100
-from .util import mp
+from .util import mp, start_log_thrs, start_stackmon
 from .authsrv import AuthSrv
 from .tcpsrv import TcpSrv
 from .up2k import Up2k
@@ -42,6 +42,12 @@ class SvcHub(object):
         if args.lo:
             self._setup_logfile(printed)
 
+        if args.stackmon:
+            start_stackmon(args.stackmon, 0)
+
+        if args.log_thrs:
+            start_log_thrs(self.log, args.log_thrs, 0)
+
         # initiate all services to manage
         self.asrv = AuthSrv(self.args, self.log, False)
         if args.ls:
diff --git a/copyparty/util.py b/copyparty/util.py
index 692e8127..29e1efa4 100644
--- a/copyparty/util.py
+++ b/copyparty/util.py
@@ -16,6 +16,7 @@ import mimetypes
 import contextlib
 import subprocess as sp  # nosec
 from datetime import datetime
+from collections import Counter
 
 from .__init__ import PY2, WINDOWS, ANYWIN
 from .stolen import surrogateescape
@@ -282,6 +283,62 @@ def alltrace():
     return "\n".join(rret + bret)
 
 
+def start_stackmon(arg_str, nid):
+    suffix = "-{}".format(nid) if nid else ""
+    fp, f = arg_str.rsplit(",", 1)
+    f = int(f)
+    t = threading.Thread(
+        target=stackmon,
+        args=(fp, f, suffix),
+        name="stackmon" + suffix,
+    )
+    t.daemon = True
+    t.start()
+
+
+def stackmon(fp, ival, suffix):
+    ctr = 0
+    while True:
+        ctr += 1
+        time.sleep(ival)
+        st = "{}, {}\n{}".format(ctr, time.time(), alltrace())
+        with open(fp + suffix, "wb") as f:
+            f.write(st.encode("utf-8", "replace"))
+
+
+def start_log_thrs(logger, ival, nid):
+    ival = int(ival)
+    tname = lname = "log-thrs"
+    if nid:
+        tname = "logthr-n{}-i{:x}".format(nid, os.getpid())
+        lname = tname[3:]
+
+    t = threading.Thread(
+        target=log_thrs,
+        args=(logger, ival, lname),
+        name=tname,
+    )
+    t.daemon = True
+    t.start()
+
+
+def log_thrs(log, ival, name):
+    while True:
+        time.sleep(ival)
+        tv = [x.name for x in threading.enumerate()]
+        tv = [
+            x.split("-")[0]
+            if x.startswith("httpconn-") or x.startswith("thumb-")
+            else "listen"
+            if "-listen-" in x
+            else x
+            for x in tv
+            if not x.startswith("pydevd.")
+        ]
+        tv = ["{}\033[36m{}".format(v, k) for k, v in sorted(Counter(tv).items())]
+        log(name, "\033[0m \033[33m".join(tv), 3)
+
+
 def min_ex():
     et, ev, tb = sys.exc_info()
     tb = traceback.extract_tb(tb)