Bug 2310433 - ISA-L plugins (libec_isa.so and libceph_crypto_isal.so) don't include AVX512 acceleration [NEEDINFO]
Summary: ISA-L plugins (libec_isa.so and libceph_crypto_isal.so) don't include AVX512 ...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Ceph Storage
Classification: Red Hat Storage
Component: RADOS
Version: 8.0
Hardware: Unspecified
OS: Unspecified
unspecified
high
Target Milestone: ---
: 8.1
Assignee: Radoslaw Zarzynski
QA Contact: Pawan
URL:
Whiteboard:
Depends On:
Blocks: 2351689
TreeView+ depends on / blocked
 
Reported: 2024-09-06 15:10 UTC by Casey Bodley
Modified: 2025-06-26 12:15 UTC (History)
11 users (show)

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.
Clone Of:
Environment:
Last Closed: 2025-06-26 12:15:36 UTC
Embargoed:
pdhiran: needinfo? (rzarzyns)
bhubbard: needinfo? (rzarzyns)


Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Ceph Project Bug Tracker 67943 0 None None None 2024-09-06 15:10:09 UTC
Github ceph ceph pull 59513 0 None open cmake: use ExternalProjects to build isa-l and isa-l_crypto libraries 2024-09-06 15:10:09 UTC
Github ceph ceph pull 60107 0 None open squid: cmake: use ExternalProjects to build isa-l and isa-l_crypto libraries 2024-11-08 19:23:02 UTC
Red Hat Issue Tracker RHCEPH-9718 0 None None None 2024-09-06 15:11:03 UTC
Red Hat Product Errata RHSA-2025:9775 0 None None None 2025-06-26 12:15:45 UTC

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


Note You need to log in before you can comment on or make changes to this bug.