From: Takashi Yano <takashi.yano@nifty.ne.jp>
To: cygwin-developers@cygwin.com
Subject: Re: cygrunsrv + sshd + rsync = 20 times too slow -- throttled?
Date: Wed, 8 Sep 2021 18:01:42 +0900 [thread overview]
Message-ID: <20210908180142.a4dfe510100164f123c38158@nifty.ne.jp> (raw)
In-Reply-To: <20210908131141.bf63a795ce13c8dd8f5c13a8@nifty.ne.jp>
[-- Attachment #1: Type: text/plain, Size: 1570 bytes --]
On Wed, 8 Sep 2021 13:11:41 +0900
Takashi Yano wrote:
> On Wed, 8 Sep 2021 09:07:48 +0900
> Takashi Yano wrote:
> > On Tue, 7 Sep 2021 19:50:23 +0900
> > Takashi Yano wrote:
> >
> > > @@ -796,7 +792,8 @@ pipe_cleanup (select_record *, select_stuff *stuff)
> > > pi->stop_thread = true;
> > > SetEvent (pi->bye);
> > ~~~~~~~~~~~~~~~~~~~
> > This is not correct. SetEvent() wakes-up one of thread_pipe()s,
> > but it may be other thread than one which should be stopped.
> >
> > > pi->thread->detach ();
> > > - CloseHandle (pi->bye);
> > > + if (me->fh->get_select_evt () == NULL)
> > > + CloseHandle (pi->bye);
> > > }
> > > delete pi;
> > > stuff->device_specific_pipe = NULL;
> >
> > I think it also should be
> > > + for (ULONG i = 0; i < get_obj_handle_count (select_evt); i++)
> > > + SetEvent (select_evt);
> >
> > Actually I want to use PulseEvent() here if it is not **UNRELIABLE**.
> > https://docs.microsoft.com/en-us/windows-hardware/drivers/devtest/28648-pulseevent-is-an-unreliable-function
> >
> > Does using semaphore object instead of event, and releasing
> > resources equal to the number of handles make sense?
>
> No it does not. One thread may consume semaphore multiple times....
I wrote a simple test program which counts wake-up 1000 times in 100
threads, and confirmed that semaphore method works as expected as well
as PulseEvent(). All 100000 (100*1000) wake-up were counted without
miscount.
Therefore, patch attached should work.
--
Takashi Yano <takashi.yano@nifty.ne.jp>
[-- Attachment #2: 0001-Cygwin-select-Introduce-select_sem-semaphore-for-pip.patch --]
[-- Type: application/octet-stream, Size: 6742 bytes --]
From aaf0d8ba7ff8385884968a3664c58d05931b09b6 Mon Sep 17 00:00:00 2001
From: Takashi Yano <takashi.yano@nifty.ne.jp>
Date: Wed, 8 Sep 2021 17:18:35 +0900
Subject: [PATCH] Cygwin: select: Introduce select_sem semaphore for pipe.
- This patch reverts "Cygwin: select: Improve select/poll response",
and introduces select_sem semaphore which notifies pipe status
change.
---
winsup/cygwin/fhandler.cc | 1 +
winsup/cygwin/fhandler.h | 3 +++
winsup/cygwin/fhandler_pipe.cc | 25 ++++++++++++++++++++
winsup/cygwin/select.cc | 42 ++++++++++------------------------
4 files changed, 41 insertions(+), 30 deletions(-)
diff --git a/winsup/cygwin/fhandler.cc b/winsup/cygwin/fhandler.cc
index f0c1b68f1..39fe2640a 100644
--- a/winsup/cygwin/fhandler.cc
+++ b/winsup/cygwin/fhandler.cc
@@ -1464,6 +1464,7 @@ fhandler_base::fhandler_base () :
_refcnt (0),
openflags (0),
unique_id (0),
+ select_sem (NULL),
archetype (NULL),
usecount (0)
{
diff --git a/winsup/cygwin/fhandler.h b/winsup/cygwin/fhandler.h
index 7aed089eb..d309be2f7 100644
--- a/winsup/cygwin/fhandler.h
+++ b/winsup/cygwin/fhandler.h
@@ -217,6 +217,7 @@ class fhandler_base
void set_ino (ino_t i) { ino = i; }
HANDLE read_state;
+ HANDLE select_sem;
public:
LONG inc_refcnt () {return InterlockedIncrement (&_refcnt);}
@@ -520,6 +521,8 @@ public:
fh->copy_from (this);
return fh;
}
+
+ HANDLE get_select_sem () { return select_sem; }
};
struct wsa_event
diff --git a/winsup/cygwin/fhandler_pipe.cc b/winsup/cygwin/fhandler_pipe.cc
index c75476040..503d5c888 100644
--- a/winsup/cygwin/fhandler_pipe.cc
+++ b/winsup/cygwin/fhandler_pipe.cc
@@ -376,6 +376,8 @@ fhandler_pipe::raw_read (void *ptr, size_t& len)
}
else if (status == STATUS_THREAD_CANCELED)
pthread::static_cancel_self ();
+ if (select_sem && nbytes)
+ ReleaseSemaphore (select_sem, get_obj_handle_count (select_sem), NULL);
len = nbytes;
}
@@ -507,6 +509,8 @@ fhandler_pipe_fifo::raw_write (const void *ptr, size_t len)
set_errno (EINTR);
else if (status == STATUS_THREAD_CANCELED)
pthread::static_cancel_self ();
+ if (select_sem && nbytes)
+ ReleaseSemaphore (select_sem, get_obj_handle_count (select_sem), NULL);
return nbytes ?: -1;
}
@@ -515,6 +519,8 @@ fhandler_pipe::fixup_after_fork (HANDLE parent)
{
if (read_mtx)
fork_fixup (parent, read_mtx, "read_mtx");
+ if (select_sem)
+ fork_fixup (parent, select_sem, "select_sem");
fhandler_base::fixup_after_fork (parent);
}
@@ -536,6 +542,15 @@ fhandler_pipe::dup (fhandler_base *child, int flags)
ftp->close ();
res = -1;
}
+ else if (select_sem &&
+ !DuplicateHandle (GetCurrentProcess (), select_sem,
+ GetCurrentProcess (), &ftp->select_sem,
+ 0, !(flags & O_CLOEXEC), DUPLICATE_SAME_ACCESS))
+ {
+ __seterrno ();
+ ftp->close ();
+ res = -1;
+ }
debug_printf ("res %d", res);
return res;
@@ -546,6 +561,11 @@ fhandler_pipe::close ()
{
if (read_mtx)
CloseHandle (read_mtx);
+ if (select_sem)
+ {
+ ReleaseSemaphore (select_sem, get_obj_handle_count (select_sem), NULL);
+ CloseHandle (select_sem);
+ }
return fhandler_base::close ();
}
@@ -765,6 +785,11 @@ fhandler_pipe::create (fhandler_pipe *fhs[2], unsigned psize, int mode)
fhs[0]->set_read_mutex (mtx);
res = 0;
}
+ fhs[0]->select_sem = CreateSemaphore (&sa, 0, INT32_MAX, NULL);
+ if (fhs[0]->select_sem)
+ DuplicateHandle (GetCurrentProcess (), fhs[0]->select_sem,
+ GetCurrentProcess (), &fhs[1]->select_sem,
+ 0, 1, DUPLICATE_SAME_ACCESS);
}
debug_printf ("%R = pipe([%p, %p], %d, %y)", res, fhs[0], fhs[1], psize, mode);
diff --git a/winsup/cygwin/select.cc b/winsup/cygwin/select.cc
index 5e338e43f..e9e71b269 100644
--- a/winsup/cygwin/select.cc
+++ b/winsup/cygwin/select.cc
@@ -726,7 +726,6 @@ thread_pipe (void *arg)
select_pipe_info *pi = (select_pipe_info *) arg;
DWORD sleep_time = 0;
bool looping = true;
- DWORD t0 = GetTickCount ();
while (looping)
{
@@ -746,12 +745,7 @@ thread_pipe (void *arg)
break;
cygwait (pi->bye, sleep_time >> 3);
if (sleep_time < 80)
- {
- DWORD t1 = GetTickCount ();
- if (t0 != t1)
- ++sleep_time;
- t0 = t1;
- }
+ ++sleep_time;
if (pi->stop_thread)
break;
}
@@ -768,7 +762,13 @@ start_thread_pipe (select_record *me, select_stuff *stuff)
{
pi->start = &stuff->start;
pi->stop_thread = false;
- pi->bye = CreateEvent (&sec_none_nih, TRUE, FALSE, NULL);
+ pi->bye = me->fh->get_select_sem ();
+ if (pi->bye)
+ DuplicateHandle (GetCurrentProcess (), pi->bye,
+ GetCurrentProcess (), &pi->bye,
+ 0, 0, DUPLICATE_SAME_ACCESS);
+ else
+ pi->bye = CreateSemaphore (&sec_none_nih, 0, INT32_MAX, NULL);
pi->thread = new cygthread (thread_pipe, pi, "pipesel");
me->h = *pi->thread;
if (!me->h)
@@ -786,7 +786,7 @@ pipe_cleanup (select_record *, select_stuff *stuff)
if (pi->thread)
{
pi->stop_thread = true;
- SetEvent (pi->bye);
+ ReleaseSemaphore (pi->bye, get_obj_handle_count (pi->bye), NULL);
pi->thread->detach ();
CloseHandle (pi->bye);
}
@@ -927,7 +927,6 @@ thread_fifo (void *arg)
select_fifo_info *pi = (select_fifo_info *) arg;
DWORD sleep_time = 0;
bool looping = true;
- DWORD t0 = GetTickCount ();
while (looping)
{
@@ -947,12 +946,7 @@ thread_fifo (void *arg)
break;
cygwait (pi->bye, sleep_time >> 3);
if (sleep_time < 80)
- {
- DWORD t1 = GetTickCount ();
- if (t0 != t1)
- ++sleep_time;
- t0 = t1;
- }
+ ++sleep_time;
if (pi->stop_thread)
break;
}
@@ -1128,7 +1122,6 @@ thread_console (void *arg)
select_console_info *ci = (select_console_info *) arg;
DWORD sleep_time = 0;
bool looping = true;
- DWORD t0 = GetTickCount ();
while (looping)
{
@@ -1148,12 +1141,7 @@ thread_console (void *arg)
break;
cygwait (ci->bye, sleep_time >> 3);
if (sleep_time < 80)
- {
- DWORD t1 = GetTickCount ();
- if (t0 != t1)
- ++sleep_time;
- t0 = t1;
- }
+ ++sleep_time;
if (ci->stop_thread)
break;
}
@@ -1373,7 +1361,6 @@ thread_pty_slave (void *arg)
select_pipe_info *pi = (select_pipe_info *) arg;
DWORD sleep_time = 0;
bool looping = true;
- DWORD t0 = GetTickCount ();
while (looping)
{
@@ -1393,12 +1380,7 @@ thread_pty_slave (void *arg)
break;
cygwait (pi->bye, sleep_time >> 3);
if (sleep_time < 80)
- {
- DWORD t1 = GetTickCount ();
- if (t0 != t1)
- ++sleep_time;
- t0 = t1;
- }
+ ++sleep_time;
if (pi->stop_thread)
break;
}
--
2.33.0
next prev parent reply other threads:[~2021-09-08 9:02 UTC|newest]
Thread overview: 250+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <41A583E1-C8E7-42AB-9F24-EEC33A41EC60@house.org>
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[not found] ` <6e9bb35e-6f4f-cf78-e515-549da487b5ef@cornell.edu>
2021-08-30 7:57 ` Corinna Vinschen
[not found] ` <20210829180729.48b4e877f773cb3980c5766d@nifty.ne.jp>
[not found] ` <789f056a-f164-d71d-1dc9-230f5a41846d@cornell.edu>
2021-08-30 8:27 ` Corinna Vinschen
2021-08-30 13:00 ` Corinna Vinschen
2021-08-30 13:20 ` Corinna Vinschen
2021-08-30 13:41 ` Ken Brown
2021-08-30 14:12 ` Corinna Vinschen
2021-08-30 14:52 ` Ken Brown
2021-08-30 15:15 ` Corinna Vinschen
[not found] ` <20210830043756.8aa0ada77db0bfbbe3889f62@nifty.ne.jp>
[not found] ` <47e5dd74-b940-f305-fd5a-c6c9d8f41305@cornell.edu>
2021-08-30 8:48 ` Corinna Vinschen
[not found] ` <c62d18df-ab7a-7233-62ee-29a8eced5353@cornell.edu>
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[not found] ` <20210830170204.fa91eaf110f310f13b67abc3@nifty.ne.jp>
2021-08-30 10:20 ` Corinna Vinschen
2021-08-30 10:38 ` Corinna Vinschen
2021-08-30 12:04 ` Takashi Yano
2021-08-30 12:55 ` Corinna Vinschen
2021-08-30 13:31 ` Corinna Vinschen
2021-08-31 8:50 ` Takashi Yano
2021-08-30 13:51 ` Ken Brown
2021-08-30 15:00 ` Ken Brown
2021-08-30 15:19 ` Corinna Vinschen
2021-08-30 15:43 ` Ken Brown
2021-08-31 9:43 ` Corinna Vinschen
2021-08-31 8:52 ` Takashi Yano
2021-08-31 9:04 ` Corinna Vinschen
2021-08-31 11:05 ` Takashi Yano
2021-08-31 15:20 ` Corinna Vinschen
2021-09-01 2:39 ` Takashi Yano
2021-09-01 8:03 ` Corinna Vinschen
2021-09-01 8:13 ` Corinna Vinschen
2021-08-30 13:36 ` Ken Brown
2021-08-30 14:05 ` Corinna Vinschen
2021-08-30 15:53 ` Corinna Vinschen
2021-08-30 17:00 ` Corinna Vinschen
2021-08-30 17:11 ` Corinna Vinschen
2021-08-30 18:59 ` Ken Brown
2021-08-30 19:12 ` Ken Brown
2021-08-30 20:21 ` Corinna Vinschen
2021-08-30 20:14 ` Corinna Vinschen
2021-08-30 20:47 ` Ken Brown
2021-08-31 8:55 ` Takashi Yano
2021-08-31 9:08 ` Corinna Vinschen
2021-08-31 9:25 ` Takashi Yano
2021-08-31 10:05 ` Corinna Vinschen
2021-08-31 10:18 ` Corinna Vinschen
2021-08-31 11:45 ` Takashi Yano
2021-08-31 12:31 ` Takashi Yano
2021-08-31 15:08 ` Corinna Vinschen
2021-08-31 12:33 ` Ken Brown
2021-08-31 15:18 ` Corinna Vinschen
2021-08-31 15:27 ` Corinna Vinschen
2021-08-31 15:50 ` Corinna Vinschen
2021-08-31 16:19 ` Ken Brown
2021-08-31 16:38 ` Ken Brown
2021-08-31 17:30 ` Corinna Vinschen
2021-08-31 18:54 ` Ken Brown
2021-08-31 19:51 ` Corinna Vinschen
2021-08-31 23:02 ` Takashi Yano
2021-09-01 0:16 ` Takashi Yano
2021-09-01 8:07 ` Corinna Vinschen
2021-09-01 8:23 ` Takashi Yano
2021-09-01 8:46 ` Corinna Vinschen
2021-09-01 12:56 ` Ken Brown
2021-09-01 13:52 ` Corinna Vinschen
2021-09-01 23:02 ` Ken Brown
2021-09-02 8:17 ` Corinna Vinschen
2021-09-02 13:01 ` Ken Brown
2021-09-02 19:00 ` Corinna Vinschen
2021-09-02 19:34 ` Ken Brown
2021-09-02 19:35 ` Corinna Vinschen
2021-09-02 20:19 ` Ken Brown
2021-09-03 9:12 ` Corinna Vinschen
2021-09-03 19:00 ` Ken Brown
2021-09-03 19:53 ` Ken Brown
2021-09-03 19:54 ` Corinna Vinschen
2021-09-03 20:05 ` Ken Brown
2021-09-03 10:00 ` Takashi Yano
2021-09-03 10:13 ` Takashi Yano
2021-09-03 11:31 ` Corinna Vinschen
2021-09-03 11:41 ` Corinna Vinschen
2021-09-03 12:13 ` Ken Brown
2021-09-03 15:00 ` Corinna Vinschen
2021-09-03 15:14 ` Ken Brown
2021-09-03 15:17 ` Corinna Vinschen
2021-09-03 12:22 ` Takashi Yano
2021-09-03 13:27 ` Ken Brown
2021-09-03 15:37 ` Corinna Vinschen
2021-09-04 12:02 ` Takashi Yano
2021-09-04 12:37 ` Takashi Yano
2021-09-04 14:04 ` Ken Brown
2021-09-04 23:15 ` Takashi Yano
2021-09-05 13:40 ` Takashi Yano
2021-09-05 13:50 ` Takashi Yano
2021-09-05 18:47 ` Ken Brown
2021-09-05 19:42 ` Takashi Yano
2021-09-05 20:09 ` Takashi Yano
2021-09-05 20:27 ` Ken Brown
2021-09-06 8:13 ` Corinna Vinschen
2021-09-06 11:16 ` Takashi Yano
2021-09-06 12:49 ` Corinna Vinschen
2021-09-06 13:16 ` Takashi Yano
2021-09-06 16:08 ` Corinna Vinschen
2021-09-06 23:39 ` Takashi Yano
2021-09-07 9:14 ` Corinna Vinschen
2021-09-07 11:03 ` Takashi Yano
2021-09-07 16:14 ` Ken Brown
2021-09-07 18:26 ` Corinna Vinschen
2021-09-03 10:38 ` Takashi Yano
2021-09-08 11:32 ` Takashi Yano
2021-09-08 11:55 ` Corinna Vinschen
2021-09-08 12:33 ` Takashi Yano
2021-09-08 17:43 ` Ken Brown
2021-09-08 18:28 ` Corinna Vinschen
2021-09-02 8:15 ` Takashi Yano
2021-09-02 18:54 ` Corinna Vinschen
2021-09-07 3:26 ` Takashi Yano
2021-09-07 10:50 ` Takashi Yano
2021-09-08 0:07 ` Takashi Yano
2021-09-08 4:11 ` Takashi Yano
2021-09-08 9:01 ` Takashi Yano [this message]
2021-09-08 9:01 ` Corinna Vinschen
2021-09-08 9:26 ` Corinna Vinschen
2021-09-08 9:45 ` Takashi Yano
2021-09-08 10:04 ` Corinna Vinschen
2021-09-08 10:45 ` Takashi Yano
2021-09-08 10:51 ` Corinna Vinschen
2021-09-09 3:21 ` Takashi Yano
2021-09-09 9:37 ` Corinna Vinschen
2021-09-09 10:55 ` Takashi Yano
2021-09-09 11:41 ` Corinna Vinschen
2021-09-08 9:37 ` Takashi Yano
2021-09-09 3:41 ` Takashi Yano
2021-09-09 8:05 ` Takashi Yano
2021-09-09 12:19 ` Takashi Yano
2021-09-09 12:42 ` Takashi Yano
2021-09-09 21:53 ` Takashi Yano
2021-09-10 3:41 ` Takashi Yano
2021-09-10 10:57 ` Ken Brown
2021-09-10 15:17 ` Ken Brown
2021-09-10 15:26 ` Corinna Vinschen
2021-09-10 22:57 ` Takashi Yano
2021-09-11 2:17 ` Ken Brown
2021-09-11 2:35 ` Takashi Yano
2021-09-11 13:12 ` Ken Brown
2021-09-12 6:23 ` Takashi Yano
2021-09-12 14:39 ` Ken Brown
2021-09-13 9:11 ` Corinna Vinschen
2021-09-13 12:30 ` Ken Brown
2021-09-12 8:48 ` Takashi Yano
2021-09-12 11:04 ` Takashi Yano
2021-09-12 15:10 ` Ken Brown
2021-09-12 21:46 ` Ken Brown
2021-09-12 23:54 ` Takashi Yano
2021-09-13 2:19 ` Ken Brown
2021-09-13 8:40 ` Takashi Yano
2021-09-13 12:51 ` Ken Brown
2021-09-13 17:05 ` Ken Brown
2021-09-13 9:42 ` Corinna Vinschen
2021-09-13 13:03 ` Ken Brown
2021-09-13 18:39 ` Takashi Yano
2021-09-12 23:41 ` Takashi Yano
2021-09-13 17:42 ` Ken Brown
2021-09-13 18:54 ` Takashi Yano
2021-09-13 18:32 ` Corinna Vinschen
2021-09-13 19:37 ` Takashi Yano
2021-09-13 20:15 ` Corinna Vinschen
2021-09-14 8:07 ` Takashi Yano
2021-09-14 8:47 ` Corinna Vinschen
2021-09-14 12:38 ` Ken Brown
2021-09-14 14:15 ` Corinna Vinschen
2021-09-14 8:08 ` Takashi Yano
2021-09-14 9:03 ` Corinna Vinschen
2021-09-14 9:56 ` Takashi Yano
2021-09-14 10:19 ` Takashi Yano
2021-09-14 11:03 ` Corinna Vinschen
2021-09-14 12:05 ` Takashi Yano
2021-09-14 14:17 ` Corinna Vinschen
2021-09-14 22:14 ` Ken Brown
2021-09-15 0:21 ` Takashi Yano
2021-09-15 0:44 ` Takashi Yano
2021-09-15 0:59 ` Takashi Yano
2021-09-15 9:57 ` Corinna Vinschen
2021-09-15 10:48 ` Takashi Yano
2021-09-15 10:58 ` Takashi Yano
2021-09-15 11:34 ` Corinna Vinschen
2021-09-15 11:40 ` Corinna Vinschen
2021-09-15 11:13 ` Corinna Vinschen
2021-09-15 11:41 ` Ken Brown
2021-09-15 11:49 ` Corinna Vinschen
2021-09-15 11:54 ` Takashi Yano
2021-09-15 12:20 ` Corinna Vinschen
2021-09-15 13:04 ` Takashi Yano
2021-09-15 13:42 ` Corinna Vinschen
2021-09-15 16:22 ` Ken Brown
2021-09-15 17:09 ` Ken Brown
2021-09-16 0:22 ` Takashi Yano
2021-09-16 2:28 ` Ken Brown
2021-09-16 9:09 ` Takashi Yano
2021-09-16 13:02 ` Takashi Yano
2021-09-16 13:25 ` Corinna Vinschen
2021-09-16 14:27 ` Takashi Yano
2021-09-16 15:01 ` Corinna Vinschen
2021-09-16 15:46 ` Ken Brown
2021-09-16 16:02 ` Ken Brown
2021-09-16 19:42 ` Takashi Yano
2021-09-16 20:28 ` Ken Brown
2021-09-16 19:48 ` Ken Brown
2021-09-16 20:01 ` Takashi Yano
2021-09-17 2:25 ` Ken Brown
2021-09-17 8:31 ` Takashi Yano
2021-09-17 11:16 ` Ken Brown
2021-09-17 16:23 ` Takashi Yano
2021-09-17 17:08 ` Ken Brown
2021-09-17 17:39 ` Jon Turney
2021-09-17 17:43 ` Takashi Yano
2021-09-17 19:53 ` Ken Brown
2021-09-18 1:30 ` Takashi Yano
2021-09-18 2:07 ` Ken Brown
2021-09-18 2:10 ` Ken Brown
2021-09-18 8:03 ` Takashi Yano
2021-09-18 11:12 ` Ken Brown
2021-09-18 11:35 ` Takashi Yano
2021-09-18 14:11 ` Jon Turney
2021-09-18 13:44 ` Ken Brown
2021-09-19 1:31 ` Takashi Yano
2021-09-19 14:35 ` Ken Brown
2021-09-20 9:29 ` Takashi Yano
2021-09-16 0:13 ` Takashi Yano
2021-09-16 2:26 ` Ken Brown
2021-09-13 9:07 ` Corinna Vinschen
2021-09-20 12:52 ` Takashi Yano
2021-09-20 19:14 ` Ken Brown
2021-09-20 21:09 ` Ken Brown
2021-09-20 21:21 ` Ken Brown
2021-09-20 21:27 ` Takashi Yano
2021-09-20 21:39 ` Ken Brown
2021-09-20 22:16 ` Takashi Yano
2021-09-20 22:46 ` Ken Brown
2021-09-20 22:50 ` Ken Brown
2021-09-20 23:22 ` Takashi Yano
2021-09-21 8:30 ` Takashi Yano
2021-09-21 9:26 ` Mark Geisert
2021-09-21 10:10 ` Takashi Yano
2021-09-21 21:10 ` Mark Geisert
2021-09-21 13:31 ` Ken Brown
2021-09-21 15:36 ` Takashi Yano
2021-09-21 18:51 ` Ken Brown
2021-09-23 8:26 ` Takashi Yano
2021-09-23 13:03 ` Ken Brown
2021-09-23 15:03 ` Takashi Yano
2021-09-23 16:29 ` Ken Brown
2021-10-18 10:51 ` Corinna Vinschen
2021-10-18 12:02 ` Takashi Yano
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