From: "Okanovic, Haris" <harisokn@amazon.com>
To: "pgsql-hackers@postgresql.org" <pgsql-hackers@postgresql.org>
Subject: Replace spin-wait with futex-mutex in LWLockWaitListLock() on Linux
 aarch64
Thread-Topic: Replace spin-wait with futex-mutex in LWLockWaitListLock() on
 Linux aarch64
Thread-Index: AQHc9TTaCR2eX+nJI0+bWfPxKUVSQA==
Date: Fri, 5 Jun 2026 21:52:58 +0000
Message-ID: 
 <DM6PR18MB29081469262A7BBCE85220B3A8112@DM6PR18MB2908.namprd18.prod.outlook.com>
Accept-Language: en-US
Content-Language: en-US
msip_labels: 
authentication-results: dkim=none (message not signed)
 header.d=none;dmarc=none action=none header.from=amazon.com;
x-ms-publictraffictype: Email
x-ms-traffictypediagnostic: DM6PR18MB2908:EE_|LV3PR18MB6175:EE_
x-ms-office365-filtering-correlation-id: ed10ce72-be42-4162-46d5-08dec34cceba
x-ms-exchange-senderadcheck: 1
x-ms-exchange-antispam-relay: 0
x-microsoft-antispam: 
 BCL:0;ARA:13230040|366016|6049299003|376014|1800799024|38070700021|4053099003|11063799006|56012099006|18002099003;
x-microsoft-antispam-message-info: 
 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
x-forefront-antispam-report: 
 CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DM6PR18MB2908.namprd18.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(366016)(6049299003)(376014)(1800799024)(38070700021)(4053099003)(11063799006)(56012099006)(18002099003);DIR:OUT;SFP:1101;
x-ms-exchange-antispam-messagedata-chunkcount: 1
x-ms-exchange-antispam-messagedata-0: 
 =?iso-8859-1?Q?tJSUeTgrAoWE64DgkGbyeEsVopQE+1qTj7ED4qy6Gv+lUFZ0s1S29E8/L1?=
 =?iso-8859-1?Q?XVN/dOL7BZ4kwmGt1ci0iuowyIjjqudhkjLGnXsZ40Io8FxOlKpL0liQ2P?=
 =?iso-8859-1?Q?580/jbWJ15Rs4iSCYR8pnPrQTVZsKOm/n+jHcCRNbml20NX7Ja+g4OAvBb?=
 =?iso-8859-1?Q?Buya8qF7mPxxWTh+7WS7RSwO9JIXF9fm+OzffvJADerQtIYu8IpbFKvGpp?=
 =?iso-8859-1?Q?im88JNHnEwW0lxz8kiu+1T6mYtDk/1pCmHUOXVa94uym9sZk9+vUvEYDcU?=
 =?iso-8859-1?Q?5A2l4B0cv4KMmplyfzwYS5yWCn2XUAUE8aZETl1j87py+3+ms7yTsS79O+?=
 =?iso-8859-1?Q?VNTae/7+S0Ifc9Qo8PA1hnSRoYfdrtmaGt8yTGcofxAfkWVX0s1WwiHV6X?=
 =?iso-8859-1?Q?g/KlXbRxMcDwmyH2Yvg0fM8Pmg+YTKqk/kE2xC+UH2WcKAF+DqpZxPRGOk?=
 =?iso-8859-1?Q?oZ1bts6rdXClc1Rz0gQYMcwDNKt6RZKfoVjeov6AO+GNkvn3FlXe3x6Ulr?=
 =?iso-8859-1?Q?a7hsp/Op25i6uafpQ4xdjqnXzaLLp1Ggv3mj4Jm/M7iE6vDilSI/nvPzoH?=
 =?iso-8859-1?Q?tl/fBqnXZSM7hu2Cdx9bj/9ZyDztqAmHrapzi57CcIa3wnCU5CPZ2vmSAG?=
 =?iso-8859-1?Q?c8yrvU8u4p5Zv7MHrlRkJ2+pj82wjIoxRFJmI2dnXZwL7omtqCo70Rd6Wa?=
 =?iso-8859-1?Q?3HaFKYi0NyXEI1HklZj96vUQZMfjh5iF6p5pyZjOe80N6KrPh1j8jE6bAH?=
 =?iso-8859-1?Q?Rsxu6qz9cfn0uzscYrJmXwBFvFv8CCI/JXBQ52rUK+HrJBPySfKVr+XTsp?=
 =?iso-8859-1?Q?njFaLaTN1XrBCTAzrfakvxz5EWvu4/qReqUU2KejrSub/YaPmJ4ydAAq0/?=
 =?iso-8859-1?Q?Qnq6F+DbJO+1TXPwUXcSnp8A5OJMjI+e6UDu+aN0TwXWF0Lr0kW1NzjoGk?=
 =?iso-8859-1?Q?iv0c4pHA3DG2MhRIn0zj8GG9XfUgLTJC6ovWBYuI9gOn6tniqY/yxMCoSG?=
 =?iso-8859-1?Q?8myiUfTVDFcmc6ZrooKWe7JqCIp94DXBCO6TjZ1sWo/i6PfpOD+37/LRbX?=
 =?iso-8859-1?Q?qlYQG9Uwjz29grRdHpsEs7mNzanwRv5TfG+dJex6Y4+SsutOHlwLeSImIk?=
 =?iso-8859-1?Q?Qm2UyXoHOma9qyDqFUTxOpXE9IEBIVWkhktGQtJosyQGmLRsxvjDZQVF51?=
 =?iso-8859-1?Q?Q6SlMtk5YfGZrkwglVRJoIDOkd338Sh9DkOKdQqqbDXMM0GoLqqLfDOKNC?=
 =?iso-8859-1?Q?H7bHPuJ71541S1SDZqm4+Yl+AMW3kgQKLOaoqMQqEaJqqwaVrdbDtIwoCi?=
 =?iso-8859-1?Q?CbIyCaCzrI+ppakwcgmMWvKBht5dPbvva0xP1PHtIGDwF/Z+TbMl9z8M/E?=
 =?iso-8859-1?Q?8s501OsV+U8hYGWD5e6adPG8joL8M7s6AtfO2JcUeX67q34pq95Fwy8NaW?=
 =?iso-8859-1?Q?nmJlxTMAjprXt9MiLAeCcnYCKuVSsJjBtTdXC8ZI8/jp0UFLNuPxJZcnL7?=
 =?iso-8859-1?Q?Rh8GWeYFXn8eeePz5vetSWQriVVEITvLtmgIM0N/EekWeDmUVi9Za+ZRpc?=
 =?iso-8859-1?Q?h3N9ndaM+xzm86Mji8MI+/bPzDNSE23yOQ9O6GUsePY9zvCTzEvKZeBPXi?=
 =?iso-8859-1?Q?3XlaFPgSLNfo9LsszOVR349yNseGygo/wPwVMpASlIMzYlbUNBQC24bbM4?=
 =?iso-8859-1?Q?eB5a4+BN1jpMrk9PBnAX5BlxuwPlF5coTHd8673nkHXhg428JS6TcNgoh6?=
 =?iso-8859-1?Q?utBkn4N8vGHhvMnc6YGC+9lKRk/XfB1j8PvOccRibZwWt8?=
Content-Type: multipart/mixed;
	boundary="_002_DM6PR18MB29081469262A7BBCE85220B3A8112DM6PR18MB2908namp_"
MIME-Version: 1.0
X-Exchange-RoutingPolicyChecked: 
 XiSSdsEccQYBJFVsaasd+0Et3nmPIir1q/pzcSuNLQux7Y0Iv+PEVhl5Pp/RWzjAeB9Ci65WE8bi9FPnnqdzvVBm+PPsK07AmMUO7gRBvpp4ETfc047GS1FQ5iyeimHxeN4f3YRpIWqxIUwUkSyMdI/HM4r6kNBBzHiG5sYPDEdGB1y/cZODBkcQq8AGD3PBFbXpLDncfinRWJ+se+Ecl2Efo+1SsJSPLE91r1dHaGCCfJLozGJRZeIqD/+tbDygZRP8RHT0HgDh8a9W/MfdYArXize1IAKjo1sO1J6ZHfFmldT8Ujb24qzZUFKOMs9QQ03V3eDQo9SzwtTch4YnrA==
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-AuthSource: DM6PR18MB2908.namprd18.prod.outlook.com
X-MS-Exchange-CrossTenant-Network-Message-Id: 
 ed10ce72-be42-4162-46d5-08dec34cceba
X-MS-Exchange-CrossTenant-originalarrivaltime: 05 Jun 2026 21:52:58.3001
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: 5280104a-472d-4538-9ccf-1e1d0efe8b1b
X-MS-Exchange-CrossTenant-mailboxtype: HOSTED
X-MS-Exchange-CrossTenant-userprincipalname: 
 wrkbSFqfftsXauPVs3o4Df/GNi8NsqTG8gJk7s0OvyQDOkXxmbXxQyJofwJsMGXm5ZWhynj3W6PbYTMx2riQhA==
X-MS-Exchange-Transport-CrossTenantHeadersStamped: LV3PR18MB6175
X-OriginatorOrg: amazon.com
List-Id: <pgsql-hackers.lists.postgresql.org>
List-Help: <https://lists.postgresql.org/manage/>
List-Subscribe: <https://lists.postgresql.org/manage/>
List-Post: <mailto:pgsql-hackers@lists.postgresql.org>
List-Owner: <mailto:pgsql-hackers-owner@lists.postgresql.org>
List-Archive: <https://www.postgresql.org/list/pgsql-hackers>
Archived-At: 
 <https://www.postgresql.org/message-id/DM6PR18MB29081469262A7BBCE85220B3A8112%40DM6PR18MB2908.namprd18.prod.outlook.com>
Precedence: bulk

--_002_DM6PR18MB29081469262A7BBCE85220B3A8112DM6PR18MB2908namp_
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

Hi Hackers,=0A=
=0A=
The attached patch replaces LWLockWaitListLock()'s spin-polling loop=0A=
with a futex-mutex on Linux aarch64 to address a scalability bottleneck=0A=
on large Arm systems. I'd appreciate the community's perspective on=0A=
whether platform-specific logic in LWLock is an acceptable approach to=0A=
improve Arm performance, or any alternative suggestions.=0A=
=0A=
Problem:=0A=
On large Arm Neoverse V3 machines (192 cores), we observe excessive=0A=
time spent in LWLockWaitListLock() under high concurrency. For example,=0A=
pgbench TPC-B at 1000+ clients shows 40%+ of CPU time is consumed=0A=
spinning on atomic operations acquiring wait-list locks. PMU profiles=0A=
show this to be causing excessive cache-line bouncing.=0A=
=0A=
Benchmarks:=0A=
Pgbench results show 55% improvement on Neoverse V3 at large scale, and=0A=
marginal improvements or no change on Neoverse V2, V1, and N1. Max=0A=
client count the server can handle also doubles on Neoverse V3 and V2 -=0A=
that is peak throughput is at ~1000 clients instead of ~500.=0A=
=0A=
Intel Granite Rapids and AMD Turin (x86_64) both show minor degradation=0A=
with the change, which is the reason the patch is currently limited to=0A=
aarch64 only.=0A=
=0A=
Benchmark results can be found in these plots:=0A=
https://github.com/harisokanovic/harismisc/tree/master/postgres/pgsqlscalin=
g/2026-06-05/=0A=
=0A=
- 9g/8g/7g/6g are Arm Neoverse V3/V2/V1/N1 systems at different AWS sizes.=
=0A=
- 8i are Intel Granite Rapids systems at different sizes.=0A=
- 8a are AMD Turin systems at different sizes.=0A=
- m*.48xl are 192 cores, 768 GB DRAM.=0A=
- m*.24xl are 96 cores, 384 GB DRAM.=0A=
- m*.16xl are 64 cores, 256 GB DRAM.=0A=
- m*.4xl are 16 cores, 64 GB DRAM.=0A=
=0A=
Thanks,=0A=
Haris Okanovic=0A=
AWS Graviton Software=0A=

--_002_DM6PR18MB29081469262A7BBCE85220B3A8112DM6PR18MB2908namp_
Content-Type: text/x-patch;
	name="LWLockWaitListLock-futex-mutex-Linux-aarch64-v1.patch"
Content-Description: LWLockWaitListLock-futex-mutex-Linux-aarch64-v1.patch
Content-Disposition: attachment;
	filename="LWLockWaitListLock-futex-mutex-Linux-aarch64-v1.patch"; size=4058;
	creation-date="Fri, 05 Jun 2026 21:52:35 GMT";
	modification-date="Fri, 05 Jun 2026 21:52:35 GMT"
Content-Transfer-Encoding: base64
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--_002_DM6PR18MB29081469262A7BBCE85220B3A8112DM6PR18MB2908namp_--