From mboxrd@z Thu Jan 1 00:00:00 1970 From: "David Laight" Subject: RE: TCP delayed ACK heuristic Date: Tue, 18 Dec 2012 16:39:59 -0000 Message-ID: References: <270756364.27707018.1355842632348.JavaMail.root@redhat.com> <2088500005.27728019.1355843484620.JavaMail.root@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: base64 Cc: "Ben Greear" , "David Miller" , "Eric Dumazet" , "Stephen Hemminger" , "Rick Jones" , "Thomas Graf" To: "Cong Wang" , Return-path: Received: from mx0.aculab.com ([213.249.233.131]:42937 "HELO mx0.aculab.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S932093Ab2LRQrW (ORCPT ); Tue, 18 Dec 2012 11:47:22 -0500 Received: from mx0.aculab.com ([127.0.0.1]) by localhost (mx0.aculab.com [127.0.0.1]) (amavisd-new, port 10024) with SMTP id 22618-08 for ; Tue, 18 Dec 2012 16:47:18 +0000 (GMT) Content-class: urn:content-classes:message In-Reply-To: <2088500005.27728019.1355843484620.JavaMail.root@redhat.com> Sender: netdev-owner@vger.kernel.org List-ID: PiBEYXZpZCdzIHBvaW50IGlzIHRoYXQgd2UgY2FuIGRvIHNvbWUgaGV1cmlzdGljcyBmb3IgVENQ DQo+IGRlbGF5ZWQgQUNLLCBzbyB0aGUgcXVlc3Rpb24gaXMgdGhhdCB3aGF0IGtpbmQgb2YgaGV1 cmlzdGljcw0KPiBjYW4gd2UgdXNlPw0KPiANCj4gUkZDMTEyMiBleHBsaWNpdGx5IG1lbnRpb25z Og0KPiANCj4gICAgICAgICAgICAgQSBUQ1AgU0hPVUxEIGltcGxlbWVudCBhIGRlbGF5ZWQgQUNL LCBidXQgYW4gQUNLIHNob3VsZCBub3QNCj4gICAgICAgICAgICAgYmUgZXhjZXNzaXZlbHkgZGVs YXllZDsgaW4gcGFydGljdWxhciwgdGhlIGRlbGF5IE1VU1QgYmUNCj4gICAgICAgICAgICAgbGVz cyB0aGFuIDAuNSBzZWNvbmRzLCBhbmQgaW4gYSBzdHJlYW0gb2YgZnVsbC1zaXplZA0KPiAgICAg ICAgICAgICBzZWdtZW50cyB0aGVyZSBTSE9VTEQgYmUgYW4gQUNLIGZvciBhdCBsZWFzdCBldmVy eSBzZWNvbmQNCj4gICAgICAgICAgICAgc2VnbWVudC4NCj4gDQo+IHNvIHRoaXMgcHJldmVudHMg dXMgZnJvbSB1c2luZyBhbnkgaGV1cmlzdGljIGZvciB0aGUgbnVtYmVyDQo+IG9mIGNvYWxlc2Nl ZCBkZWxheWVkIEFDSy4NCg0KVGhlcmUgYXJlIHByb2JsZW1zIHdpdGggb25seSBpbXBsZW1lbnRp bmcgdGhlIGFja3MNCnNwZWNpZmllZCBieSBSRkMxMTIyLg0KDQpJJ3ZlIHNlZW4gcHJvYmxlbXMg d2hlbiB0aGUgc2VuZGluZyBzaWRlIGlzIGRvaW5nIChJIHRoaW5rKQ0KJ3Nsb3cgc3RhcnQnIHdp dGggTmFnbGUgZGlzYWJsZWQuDQpUaGUgc2VuZGVyIHdvdWxkIG9ubHkgc2VuZCA0IHNlZ21lbnRz IGJlZm9yZSB3YWl0aW5nIGZvciBhbg0KQUNLIC0gZXZlbiB3aGVuIGl0IGhhZCBtb3JlIHRoYW4g YSBmdWxsIHNpemVkIHNlZ21lbnQgd2FpdGluZy4NClNlbmRlciB3YXMgTGludXggMi42LnNvbWV0 aGluZyAocHJvYmFibHkgbG93IDIwcykuDQpJIGNoYW5nZWQgdGhlIGFwcGxpY2F0aW9uIGZsb3cg dG8gc2VuZCBkYXRhIGluIHRoZSByZXZlcnNlDQpkaXJlY3Rpb24gdG8gYXZvaWQgdGhlIHByb2Js ZW0uDQpUaGF0IHdhcyBvbiBhIH4wIGRlbGF5IGxvY2FsIGNvbm5lY3Rpb24gLSB3aGljaCBtZWFu cyB0aGF0DQp0aGVyZSBpcyBhbG1vc3QgbmV2ZXIgb3V0c3RhbmRpbmcgZGF0YSwgYW5kIHRoZSAn c2xvdyBzdGFydCcNCmhhcHBlbmVkIGFsbW9zdCBhbGwgdGhlIHRpbWUuDQpOYWdsZSBpcyBjb21w bGV0ZWx5IHRoZSB3cm9uZyBhbGdvcml0aG0gZm9yIHRoZSBkYXRhIGZsb3cuDQoNCglEYXZpZA0K