Bug 2310433

Summary:	ISA-L plugins (libec_isa.so and libceph_crypto_isal.so) don't include AVX512 acceleration
Product:	[Red Hat Storage] Red Hat Ceph Storage	Reporter:	Casey Bodley <cbodley>
Component:	RADOS	Assignee:	Radoslaw Zarzynski <rzarzyns>
Status:	CLOSED ERRATA	QA Contact:	Pawan <pdhiran>
Severity:	high	Docs Contact:
Priority:	unspecified
Version:	8.0	CC:	bhkaur, bhubbard, ceph-eng-bugs, cephqe-warriors, mbenjamin, mkogan, ngangadh, nojha, rzarzyns, tserlin, vumrao
Target Milestone:	---	Flags:	pdhiran: needinfo? (rzarzyns) bhubbard: needinfo? (rzarzyns)
Target Release:	8.1
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	ceph-19.2.1-2.el9cp	Doc Type:	Bug Fix
Doc Text:	.AVX512 support for the ISA-L erasure code plugin is now enabled Previously, due to an issue in the build scripts, the plugin did not take advantage of the AVX512 instruction set—even on CPUs that supported it—resulting in reduced performance. With this fix, the build scripts correctly enable AVX512 support, allowing the plugin to utilize the available CPU capabilities for improved performance.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2025-06-26 12:15:36 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2351689

Description Casey Bodley 2024-09-06 15:10:09 UTC

Description of problem:

Ceph's cmake links several isa-l sources directly into our shared libraries, but does not include any of the AVX512 versions of its algorithms. This effects both the isa-l erasure code plugin libec_isa.so and the libisa-l_crypto plugin ceph_crypto_isal.so. The latter is Ceph's default crypto accelerator (plugin_crypto_accelerator=crypto_isal).


Version-Release number of selected component (if applicable):

all releases

How reproducible:


Steps to Reproduce:
1. Check ec_isa.so and ceph_crypto_isal.so for AVX512 symbols:

$ nm libceph_crypto_isal.so | grep avx512 
$ nm libec_isa.so | grep avx512 

Actual results:

libraries contain no avx512 symbols

Expected results:

libraries contain the symbols

Additional info:

Comment 1 Storage PM bot 2024-09-06 15:10:22 UTC

Please specify the severity of this bug. Severity is defined here:
https://bugzilla.redhat.com/page.cgi?id=fields.html#bug_severity.

Comment 10 errata-xmlrpc 2025-06-26 12:15:36 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Important: Red Hat Ceph Storage 8.1 security, bug fix, and enhancement updates), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2025:9775