X-Recipient: archive-cygwin@delorie.com
DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:date:from:to:subject:message-id:reply-to
	:references:mime-version:content-type:in-reply-to; q=dns; s=
	default; b=H0m5s0PuEwxjaNNIIFUaXeOKfX/4ffIzdEAsS2cUDIUSzHDRAonCl
	nfiOz2PkKWMc3VnU5c546PYXYdL6XIhIyWZoMa03mnelxgiewMly4j2Y6nGWxUpD
	yVfXEfR1N3JmMlY64Uhr1OnXtd/3NmoSZLcgqD42rZpAKDkaVN+Dms=
DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:date:from:to:subject:message-id:reply-to
	:references:mime-version:content-type:in-reply-to; s=default;
	 bh=mYn/9e4PqAZG6O94/qwAwyKpYGw=; b=iUXA7oqVm1GhQUvmDNsLbXntJvqB
	YkOMKBH78VHTVPTYZAzCKlpHpLp/xUGwYLMmKbaajWsW8OfNcTb/Z6a/ac51Bq3G
	sXYm3CHFdM9yRGzZ5Q6V0500hRV5kk3no8KBcHzoKWJRkDEsLFBIXoJQJAO9OGxc
	DZMf0Hd9LrsTEAw=
Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm
List-Id: <cygwin.cygwin.com>
List-Subscribe: <mailto:cygwin-subscribe@cygwin.com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin@cygwin.com>
List-Help: <mailto:cygwin-help@cygwin.com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner@cygwin.com
Mail-Followup-To: cygwin@cygwin.com
Delivered-To: mailing list cygwin@cygwin.com
Authentication-Results: sourceware.org; auth=none
X-Virus-Found: No
X-Spam-SWARE-Status: No, score=-5.4 required=5.0 tests=AWL,BAYES_00,KAM_LAZY_DOMAIN_SECURITY autolearn=no version=3.3.2
X-HELO: calimero.vinschen.de
Date: Mon, 8 Jun 2015 17:43:34 +0200
From: Corinna Vinschen <corinna-cygwin@cygwin.com>
To: cygwin@cygwin.com
Subject: Re: More details about the tmux 2.0 regression
Message-ID: <20150608154334.GA13266@calimero.vinschen.de>
Reply-To: cygwin@cygwin.com
Mail-Followup-To: cygwin@cygwin.com
References: <CAJ1KOAidxNn99KCUNHCbGCvOc=51vz8uzo5zag_0FEYj-yyFPQ@mail.gmail.com> <20150608124159.GE3005@calimero.vinschen.de> <20150608132103.GJ3005@calimero.vinschen.de> <CAJ1KOAiz8rV33jmCuLHj9pkLBD+3w3N+7+eEQ6cZwScAkcsNyg@mail.gmail.com> <CAJ1KOAh5Sqy2Zhag=zddULcZFTa759uyr4uXY_7QGhv85w_2Og@mail.gmail.com>
MIME-Version: 1.0
Content-Type: multipart/signed; micalg=pgp-sha256;	protocol="application/pgp-signature"; boundary="6TrnltStXW4iwmi0"
Content-Disposition: inline
In-Reply-To: <CAJ1KOAh5Sqy2Zhag=zddULcZFTa759uyr4uXY_7QGhv85w_2Og@mail.gmail.com>
User-Agent: Mutt/1.5.23 (2014-03-12)

--6TrnltStXW4iwmi0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

On Jun  8 18:25, =C4=B0smail D=C3=B6nmez wrote:
> On Mon, Jun 8, 2015 at 6:12 PM, =C4=B0smail D=C3=B6nmez <ismail@donmez.ws=
> wrote:
> > On Mon, Jun 8, 2015 at 4:21 PM, Corinna Vinschen
> > <corinna-cygwin@cygwin.com> wrote:
> >> On Jun  8 14:41, Corinna Vinschen wrote:
> >>> On Jun  6 12:58, =C4=B0smail D=C3=B6nmez wrote:
> >>> > Hi,
> >>> >
> >>> > I had a nice discussion with tmux maintainers over at
> >>> > https://github.com/tmux/tmux/issues/13 about the tmux 2.0 regression
> >>> > on Cygwin.
> >>> >
> >>> > Long story short, tmux is trying to read /proc/<pid>/cmdline and
> >>> > /proc/<pid>/cwd for various reasons and for non-Cygwin programs this
> >>> > is quite slow. You can reproduce this easily run cmd.exe inside bash
> >>> > and try to
> >>> >
> >>> > cat /proc/<pid of cmd.exe>/cmdline
> >>>
> >>> Good catch!
> >>>
> >>> The problem here was that this functionality is very Cygwin centric. =
 It
> >>> tries to call into the process itself to fetch the information.
> >>>
> >>> E.g, assuming you have some /proc/1234, it tries to fetch the informa=
tion
> >>> by sending a request to process 1234 and then waits for that process
> >>> setting a semaphore.  A non-Cygwin process will obviously fail to do =
so,
> >>> not knowing about the method at all.
> >>>
> >>> I fixed that in the Cygwin git repo and it seems to work much better =
now
> >>> to run native tools inside tmux with this change.
> >>>
> >>> I'll upload a developer snapshot on https://cygwin.com/snapshots/ lat=
er
> >>> today.
> >>
> >> Snapshot is up.
> >
> > That resolves the problem for me, cheers!

Thanks for testing.

> One question though, would it be possible to return executable name
> instead of <defunct> for non-Cygwin processes?

That should work, it just needs implementing.

However, I'm just mulling over another idea.  It's probably even
possible to return the comand line and cwd, as long as the calling
process (cat) has permission to open a handle to the requested process.
I'll toy around with this a bit...


Corinna

--=20
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

--6TrnltStXW4iwmi0
Content-Type: application/pgp-signature

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2
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=VjbC
-----END PGP SIGNATURE-----

--6TrnltStXW4iwmi0--