From: Takashi Yano <takashi.yano@nifty.ne.jp>
To: cygwin-developers@cygwin.com
Subject: Re: cygrunsrv + sshd + rsync = 20 times too slow -- throttled?
Date: Thu, 9 Sep 2021 21:42:46 +0900 [thread overview]
Message-ID: <20210909214246.cd1ff1a3062fea27e51ad4ae@nifty.ne.jp> (raw)
In-Reply-To: <20210909211940.51ef391e27d43f0421962cb8@nifty.ne.jp>
[-- Attachment #1: Type: text/plain, Size: 1044 bytes --]
On Thu, 9 Sep 2021 21:19:40 +0900
Takashi Yano wrote:
> On Thu, 9 Sep 2021 17:05:49 +0900
> Takashi Yano wrote:
> > On Thu, 9 Sep 2021 12:41:15 +0900
> > Takashi Yano wrote:
> > > diff --git a/winsup/cygwin/fhandler_fifo.cc b/winsup/cygwin/fhandler_fifo.cc
> > > index 6709fb974..c40573783 100644
> > > --- a/winsup/cygwin/fhandler_fifo.cc
> > > +++ b/winsup/cygwin/fhandler_fifo.cc
> > > @@ -1047,6 +1047,12 @@ writer_shmem:
> > > ResetEvent (writer_opening);
> > > nwriters_unlock ();
> > > success:
> > > + if (!select_sem)
> > > + {
> > > + char name[MAX_PATH];
> > > + __small_sprintf(name, "semaphore-%W", get_pipe_name ()->Buffer);
> > > + select_sem = CreateSemaphore (&sec_none, 0, INT32_MAX, name);
> > > + }
> > > return 1;
> > > err_close_reader:
> > > saved_errno = get_errno ();
> >
> > Should this be:
> > > + select_sem = CreateSemaphore (sa_buf, 0, INT32_MAX, name);
> > ?
>
> I revised the patch a bit.
Sorry, I revised the patch again.
--
Takashi Yano <takashi.yano@nifty.ne.jp>
[-- Attachment #2: 0001-Cygwin-fifo-Utilize-select_sem-for-fifo-as-well-as-p.patch --]
[-- Type: application/octet-stream, Size: 5062 bytes --]
From ba92a1ffb1c9b9bdacc363444f27fd328137fefd Mon Sep 17 00:00:00 2001
From: Takashi Yano <takashi.yano@nifty.ne.jp>
Date: Thu, 9 Sep 2021 21:40:37 +0900
Subject: [PATCH] Cygwin: fifo: Utilize select_sem for fifo as well as pipe.
---
winsup/cygwin/fhandler_fifo.cc | 38 ++++++++++++++++++++++++++++++++--
winsup/cygwin/select.cc | 10 +++++++--
2 files changed, 44 insertions(+), 4 deletions(-)
diff --git a/winsup/cygwin/fhandler_fifo.cc b/winsup/cygwin/fhandler_fifo.cc
index 6709fb974..6de9a229b 100644
--- a/winsup/cygwin/fhandler_fifo.cc
+++ b/winsup/cygwin/fhandler_fifo.cc
@@ -1047,6 +1047,11 @@ writer_shmem:
ResetEvent (writer_opening);
nwriters_unlock ();
success:
+ if (!select_sem)
+ {
+ __small_sprintf (npbuf, "semaphore.%08x.%016X", get_dev (), get_ino ());
+ select_sem = CreateSemaphore (sa_buf, 0, INT32_MAX, npbuf);
+ }
return 1;
err_close_reader:
saved_errno = get_errno ();
@@ -1235,6 +1240,10 @@ fhandler_fifo::raw_read (void *in_ptr, size_t& len)
len = io.Information;
fifo_client_unlock ();
reading_unlock ();
+ if (select_sem)
+ ReleaseSemaphore (select_sem,
+ get_obj_handle_count (select_sem),
+ NULL);
return;
}
break;
@@ -1273,6 +1282,10 @@ fhandler_fifo::raw_read (void *in_ptr, size_t& len)
fc_handler[i].last_read = true;
fifo_client_unlock ();
reading_unlock ();
+ if (select_sem)
+ ReleaseSemaphore (select_sem,
+ get_obj_handle_count (select_sem),
+ NULL);
return;
}
break;
@@ -1312,6 +1325,10 @@ fhandler_fifo::raw_read (void *in_ptr, size_t& len)
fc_handler[i].last_read = true;
fifo_client_unlock ();
reading_unlock ();
+ if (select_sem)
+ ReleaseSemaphore (select_sem,
+ get_obj_handle_count (select_sem),
+ NULL);
return;
}
break;
@@ -1345,7 +1362,7 @@ maybe_retry:
else
{
/* Allow interruption and don't hog the CPU. */
- DWORD waitret = cygwait (NULL, 1, cw_cancel | cw_sig_eintr);
+ DWORD waitret = cygwait (select_sem, 1, cw_cancel | cw_sig_eintr);
if (waitret == WAIT_CANCELED)
pthread::static_cancel_self ();
else if (waitret == WAIT_SIGNALED)
@@ -1569,6 +1586,11 @@ fhandler_fifo::close ()
NtClose (write_ready);
if (writer_opening)
NtClose (writer_opening);
+ if (select_sem)
+ {
+ ReleaseSemaphore (select_sem, get_obj_handle_count (select_sem), NULL);
+ NtClose (select_sem);
+ }
if (nohandle ())
return 0;
else
@@ -1632,6 +1654,14 @@ fhandler_fifo::dup (fhandler_base *child, int flags)
__seterrno ();
goto err_close_writer_opening;
}
+ if (select_sem &&
+ !DuplicateHandle (GetCurrentProcess (), select_sem,
+ GetCurrentProcess (), &fhf->select_sem,
+ 0, !(flags & O_CLOEXEC), DUPLICATE_SAME_ACCESS))
+ {
+ __seterrno ();
+ goto err_close_shmem;
+ }
if (fhf->reopen_shmem () < 0)
goto err_close_shmem_handle;
if (reader)
@@ -1648,7 +1678,7 @@ fhandler_fifo::dup (fhandler_base *child, int flags)
0, !(flags & O_CLOEXEC), DUPLICATE_SAME_ACCESS))
{
__seterrno ();
- goto err_close_shmem;
+ goto err_close_select_sem;
}
if (fhf->reopen_shared_fc_handler () < 0)
goto err_close_shared_fc_hdl;
@@ -1696,6 +1726,8 @@ err_close_shared_fc_handler:
NtUnmapViewOfSection (GetCurrentProcess (), fhf->shared_fc_handler);
err_close_shared_fc_hdl:
NtClose (fhf->shared_fc_hdl);
+err_close_select_sem:
+ NtClose (fhf->select_sem);
err_close_shmem:
NtUnmapViewOfSection (GetCurrentProcess (), fhf->shmem);
err_close_shmem_handle:
@@ -1720,6 +1752,8 @@ fhandler_fifo::fixup_after_fork (HANDLE parent)
fork_fixup (parent, shmem_handle, "shmem_handle");
if (reopen_shmem () < 0)
api_fatal ("Can't reopen shared memory during fork, %E");
+ if (select_sem)
+ fork_fixup (parent, select_sem, "select_sem");
if (reader)
{
/* Make sure the child starts unlocked. */
diff --git a/winsup/cygwin/select.cc b/winsup/cygwin/select.cc
index e9e71b269..5e583434c 100644
--- a/winsup/cygwin/select.cc
+++ b/winsup/cygwin/select.cc
@@ -963,7 +963,13 @@ start_thread_fifo (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_fifo, pi, "fifosel");
me->h = *pi->thread;
if (!me->h)
@@ -981,7 +987,7 @@ fifo_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);
}
--
2.33.0
next prev parent reply other threads:[~2021-09-09 12:43 UTC|newest]
Thread overview: 250+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <41A583E1-C8E7-42AB-9F24-EEC33A41EC60@house.org>
[not found] ` <20210825201845.07b6400b79dc5558a7761efe@nifty.ne.jp>
[not found] ` <f8106fe7-a2b8-d106-3061-4d888124f4b0@cornell.edu>
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[not found] ` <YSok0PoCQn2TPPrn@calimero.vinschen.de>
[not found] ` <20210829004346.c2f80469abc3a07fd4b2918d@nifty.ne.jp>
[not found] ` <e8caa02f-be85-33bc-3f09-347c1cdb0923@cornell.edu>
[not found] ` <20210829174124.0c1ae6c16a3e8da1f490abc7@nifty.ne.jp>
[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>
[not found] ` <20210830091314.f9a2cb71794d0f68cdb5eba7@nifty.ne.jp>
[not found] ` <20210830092259.52f7d54fc3fa340738373af4@nifty.ne.jp>
[not found] ` <d217ef03-7858-5e22-0aa6-f0507eedd9da@cornell.edu>
[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
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 [this message]
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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