From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Soni, Shivam" <shivsoni@amazon.com>
Subject: Re: TX unable to enqueue packets to NIC due to no free
 TX descriptor
Date: Mon, 14 Jan 2019 17:54:19 +0000
Message-ID: <C9FFB33D-1CB2-43DE-98B7-DFD1775273D5@amazon.com>
References: <454CCFA5-5843-441F-9C6D-33E807419574@amazon.com>
 <20190111153709.3117c539@hermes.lan>
 <E5C5DF95-5AF8-4F9F-8FED-6946E788F15F@amazon.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Cc: "dev@dpdk.org" <dev@dpdk.org>, "users@dpdk.org" <users@dpdk.org>
To: Stephen Hemminger <stephen@networkplumber.org>
Return-path: <dev-bounces@dpdk.org>
In-Reply-To: <E5C5DF95-5AF8-4F9F-8FED-6946E788F15F@amazon.com>
Content-Language: en-US
Content-ID: <4106B161628D1F459D3E82D5DF96AF8F@amazon.com>
List-Id: DPDK patches and discussions <dev.dpdk.org>
List-Unsubscribe: <https://mails.dpdk.org/options/dev>,
 <mailto:dev-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://mails.dpdk.org/archives/dev/>
List-Post: <mailto:dev@dpdk.org>
List-Help: <mailto:dev-request@dpdk.org?subject=help>
List-Subscribe: <https://mails.dpdk.org/listinfo/dev>,
 <mailto:dev-request@dpdk.org?subject=subscribe>
Errors-To: dev-bounces@dpdk.org
Sender: "dev" <dev-bounces@dpdk.org>

SSBkb3VibGVkIHRoZSBtZW1wb29sIHNpemUgdG8gNjU1MzUgYnV0IHRoZSBpc3N1ZSBpcyBub3Qg
cmVzb2x2ZWQuDQoNCu+7v09uIDEvMTEvMTksIDQ6MjcgUE0sICJkZXYgb24gYmVoYWxmIG9mIFNv
bmksIFNoaXZhbSIgPGRldi1ib3VuY2VzQGRwZGsub3JnIG9uIGJlaGFsZiBvZiBzaGl2c29uaUBh
bWF6b24uY29tPiB3cm90ZToNCg0KICAgIEhpIFN0ZXBoZW4sDQogICAgDQogICAgVGhhbmtzIGZv
ciB0aGUgcmVwbHkuDQogICAgDQogICAgT3VyIG1idWYgcG9vbCBpcyBiaWcgZW5vdWdoLiBXZSBo
YXZlIDIgUlggY29yZXMsIDIgVFggY29yZXMgYW5kIDggd29ya2VyIGNvcmVzLg0KICAgIE5UeGQg
YW5kIE5SeGQgaXMgMTAyNCBlYWNoIGFuZCB3ZSBoYXZlIDE2IFJ4IHJpbmdzIChzaGFyZWQgYmV0
d2VlbiBSeCBhbmQgd29ya2VycykgYW5kIDggVHggcmluZ3MgKGJldHdlZW4gVHggYW5kIHdvcmtl
cnMpDQogICAgTWVtcG9vbCBjYWNoZSBzaXplIGlzIDI1NiBhbmQgYnVyc3Qgc2l6ZSBpcyAzMi4N
CiAgICANCiAgICBTbyBvdmVyYWxsIGNhbGN1bGF0aW9uIGNvbWVzIG91dCB0byBiZSANCiAgICAo
KE5JQ19SWF9RVUVVRV9TSVpFICogUlhfTENPUkVTKSArIChOSUNfVFhfUVVFVUVfU0laRSAqIFRY
X0xDT1JFUykgKyBcDQogICAgICAgICAgICAgICAgICAgICAgICAgICAgICAoV09SS0VSX1JYX1JJ
TkdfU0laRSAqIFJYX0xDT1JFUyAqIE5BVF9XT1JLRVJfTENPUkVTKSArIChXT1JLRVJfVFhfUklO
R19TSVpFICogTkFUX1dPUktFUl9MQ09SRVMpICsgXA0KICAgICAgICAgICAgICAgICAgICAgICAg
ICAgICAgKChNQlVGX0FSUkFZX1NJWkUgKyBDQUNIRV9TSVpFKSAqIChSWF9MQ09SRVMgKyBUWF9M
Q09SRVMgKyBOQVRfV09SS0VSX0xDT1JFUykpKQ0KICAgIA0KICAgIFdpdGggdGhpcyB0aGUgIG1i
dWYgcG9vbCBzaXplIHNob3VsZCBiZSAzMjEyOC4gVG8gcm91bmQgb2ZmIGFzIHBvd2VyIG9mIDIg
d2UgaGF2ZSBrZXB0IG1idWYgcG9vbCBzaXplIGFzIDMyNzY3Lg0KICAgIA0KICAgIEFsc28gdGhl
IGluY29taW5nIHBhY2tldCByYXRlIElzIHByZXR0eSBsb3cuDQogICAgDQogICAgRm9yIHRlc3Rp
bmcgSSBoYXZlIGRvdWJsZWQgdGhlIHBvb2wgc2l6ZSBmb3Igbm93LiBOb3Qgc3VyZSB3aGV0aGVy
IHRoaXMgd2lsbCBzb2x2ZSB0aGUgaXNzdWUuDQogICAgDQogICAgVGhhbmtzLg0KICAgIA0KICAg
IE9uIDEvMTEvMTksIDM6MzggUE0sICJTdGVwaGVuIEhlbW1pbmdlciIgPHN0ZXBoZW5AbmV0d29y
a3BsdW1iZXIub3JnPiB3cm90ZToNCiAgICANCiAgICAgICAgT24gRnJpLCAxMSBKYW4gMjAxOSAy
MjoxMDozOSArMDAwMA0KICAgICAgICAiU29uaSwgU2hpdmFtIiA8c2hpdnNvbmlAYW1hem9uLmNv
bT4gd3JvdGU6DQogICAgICAgIA0KICAgICAgICA+IEhpIEFsbCwNCiAgICAgICAgPiANCiAgICAg
ICAgPiBXZSBhcmUgdHJ5aW5nIHRvIGRlYnVnIGFuZCBmaXggYW4gaXNzdWUuIEFmdGVyIHRoZSBk
ZXBsb3ltZW50LCBpbiBmZXcgb2YgdGhlIGhvc3RzIHdlIHNlZSBhbiBpc3N1ZSB3aGVyZSBUWCBp
cyB1bmFibGUgdG8gZW5xdWV1ZSBwYWNrZXRzIHRvIE5JQy4gT24gcmVib3VuY2luZyBvciByZXN0
YXJ0aW5nIG91ciBwYWNrZXQgcHJvY2Vzc29yIGRhZW1vbiwgaXNzdWUgZ2V0cyByZXNvbHZlZC4N
CiAgICAgICAgPiANCiAgICAgICAgPiBXZSBhcmUgdXNpbmcgSW50ZWxEUERLIHZlcnNpb24gMTcu
MTEuNCBhbmQgaTQwZSBkcml2ZXJzLg0KICAgICAgICA+IA0KICAgICAgICA+IE9uIGxvb2tpbmcg
aW50byBkcml2ZXLigJlzIGNvZGUsIHdlIGZvdW5kIHRoYXQgd2hlbmV2ZXIgdGhlIGlzc3VlIGlz
IGhhcHBlbmluZyB0aGUgdmFsdWUgZm9yIG5iX3R4X2ZyZWUgaXMg4oCYMOKAmS4gQW5kIHRoZW4g
aXQgdHJpZXMgdG8gZnJlZSB0aGUgYnVmZmVyIGJ5IGNhbGxpbmcgZnVuY3Rpb24g4oCYaTQwZV90
eF9mcmVlX2J1ZnPigJkuDQogICAgICAgID4gDQogICAgICAgID4gVGhpcyBtZXRob2QgcmV0dXJu
cyBlYXJseSBhcyB0aGUgYnVmZmVyIGl0cyB0cnlpbmcgdG8gZnJlZSBzYXlzIGl0IGhhc27igJl0
IGZpbmlzaGVkIHRyYW5zbWl0dGluZyB5ZXQuIFRoZSBtZXRob2QgcmV0dXJucyBhdCB0aGlzIGlm
IGNvbmRpdGlvbjoNCiAgICAgICAgPiANCiAgICAgICAgPiAvKiBjaGVjayBERCBiaXRzIG9uIHRo
cmVzaG9sZCBkZXNjcmlwdG9yICovDQogICAgICAgID4gaWYgKCh0eHEtPnR4X3JpbmdbdHhxLT50
eF9uZXh0X2RkXS5jbWRfdHlwZV9vZmZzZXRfYnN6ICYNCiAgICAgICAgPiAgICAgICAgICAgICAg
ICAgcnRlX2NwdV90b19sZV82NChJNDBFX1RYRF9RVzFfRFRZUEVfTUFTSykpICE9DQogICAgICAg
ID4gICAgICAgICAgICAgICAgIHJ0ZV9jcHVfdG9fbGVfNjQoSTQwRV9UWF9ERVNDX0RUWVBFX0RF
U0NfRE9ORSkpIHsNCiAgICAgICAgPiByZXR1cm4gMDsNCiAgICAgICAgPiB9DQogICAgICAgID4g
DQogICAgICAgID4gSGVuY2UgbmJfdHhfZnJlZSByZW1haW5zIDAuDQogICAgICAgID4gDQogICAg
ICAgID4gT3VyIHR4IGRlc2NyaXB0b3IgY291bnQgaXMgMTAyNC4NCiAgICAgICAgPiANCiAgICAg
ICAgPiBIb3cgY2FuIHdlIGZpeCB0aGlzIGlzc3VlLiAgQ2FuIHNvbWVvbmUgaGVscCB1cyBvdXQg
aGVyZSBwbGVhc2UNCiAgICAgICAgDQogICAgICAgIFVzZSBiaWdnZXIgbWJ1ZiBwb29sLiAgRm9y
IHNhZmV0eSB0aGUgbWJ1ZiBwb29sIGhhcyB0byBiZSBiaWcgZW5vdWdoDQogICAgICAgIGZvciBO
cG9ydHMgKiAoTlJ4ZCArIE5UeGQpICsgTkNvcmUgKiAobWJ1Zl9wb29sX2NhY2hlX3NpemUgKyBi
dXJzdF9zaXplKQ0KICAgICAgICANCiAgICAgICAgRWFjaCBOSUMgbWlnaHQgZ2V0IGZ1bGwgcmVj
ZWl2ZSByaW5nIGFuZCBmdWxsIHRyYW5zbWl0IHJpbmcNCiAgICAgICAgYW5kIGVhY2ggYWN0aXZl
IGNvcmUgbWlnaHQgYmUgcHJvY2Vzc2luZyBhIGJ1cnN0IG9mIHBhY2tldHMgYW5kIGhhdmUNCiAg
ICAgICAgZnJlZSBidWZmZXJzIHNpdHRpbmcgaW4gdGhlIG1idWYgcG9vbCBjYWNoZS4gVGhpcyBk
b2Vzbid0IGFjY291bnQgZm9yIGFkZGl0aW9uYWwNCiAgICAgICAgbWJ1ZidzIGNyZWF0ZWQgaWYg
ZG9pbmcgdGhpbmdzIGxpa2UgcmVhc3NlbWJseSwgZW5jcnlwdGlvbiwgcmUtZW5jYXBzdWxhdGlv
biwgb3IgY29tcHJlc3Npb24NCiAgICAgICAgDQogICAgICAgIEFueXRoaW5nIHNtYWxsZXIgYW5k
IHlvdXIgYXBwbGljYXRpb24gaXMgcmVseWluZyBvbiBzdGF0aXN0aWNhbCBhdmVyYWdlcw0KICAg
ICAgICB0byBuZXZlciBzZWUgcmVzb3VyY2UgZXhoYXVzdGlvbjsgb3ZlcmNvbW1pdG1lbnQNCiAg
ICAgICAgDQogICAgDQogICAgDQoNCg==