From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 25334 invoked by alias); 15 Oct 2014 22:01:35 -0000 Mailing-List: contact gdb-patches-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-patches-owner@sourceware.org Received: (qmail 25324 invoked by uid 89); 15 Oct 2014 22:01:34 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-2.0 required=5.0 tests=AWL,BAYES_00,SPF_HELO_PASS,T_RP_MATCHES_RCVD autolearn=ham version=3.3.2 X-HELO: mx1.redhat.com Received: from mx1.redhat.com (HELO mx1.redhat.com) (209.132.183.28) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with (AES256-GCM-SHA384 encrypted) ESMTPS; Wed, 15 Oct 2014 22:01:33 +0000 Received: from int-mx14.intmail.prod.int.phx2.redhat.com (int-mx14.intmail.prod.int.phx2.redhat.com [10.5.11.27]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id s9FM1WRd031963 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL) for ; Wed, 15 Oct 2014 18:01:32 -0400 Received: from [127.0.0.1] (ovpn01.gateway.prod.ext.ams2.redhat.com [10.39.146.11]) by int-mx14.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id s9FM1UkK019253 for ; Wed, 15 Oct 2014 18:01:31 -0400 Message-ID: <543EEEBA.7010707@redhat.com> Date: Wed, 15 Oct 2014 22:01:00 -0000 From: Pedro Alves User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.1.1 MIME-Version: 1.0 To: gdb-patches@sourceware.org Subject: [pushed] Re: [PATCH 0/4] remote thread listing: get rid of unnecessary "thread alive?" traffic References: <1412266896-28210-1-git-send-email-palves@redhat.com> In-Reply-To: <1412266896-28210-1-git-send-email-palves@redhat.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-SW-Source: 2014-10/txt/msg00411.txt.bz2 On 10/02/2014 05:21 PM, Pedro Alves wrote: > When GDB wants to sync the thread list with the target's (e.g., due to > "info threads"), it ends up sending a bunch of T (thread alive?) > packets before fetching the current remote thread list: > > Sending packet: $Tp2141.2150#82...Packet received: OK > Sending packet: $Tp2141.214f#b7...Packet received: OK > Sending packet: $Tp2141.2141#82...Packet received: OK > Sending packet: $qXfer:threads:read::0,fff#03...Packet received: l\n\n\n\n\n > > That's wasteful, given that we can tell whether a thread is gone from > the fact that it won't appear in the list returned by > qXfer:threads:read (or qfThreadInfo/qsThreadInfo, or qL). > > This series eliminates those unnecessary queries. > > IOW, after this series, the above becomes simply: > > Sending packet: $qXfer:threads:read::0,fff#03...Packet received: l\n\n\n\n\n > > Pedro Alves (4): > Merge remote thread listing methods > Push pruning old threads down to the target > remote: get rid of all the T packets when synching the thread list > DEC threads: Simplify updating the thread list I've now pushed this. Thanks, Pedro Alves