> On Sat, Oct 30, 2021 at 6:30 PM Salvatore Bonaccorso <carnil@xxxxxxxxxx> wrote: > > Were you able to pinpoint the issue? While I have been unable to reproduce this on a single cpu, Marko can repeat a stall on a dual Broadwell chipset on kernels: * 5.15.1 - https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.15.1 * 5.14.16 - https://packages.debian.org/sid/linux-image-5.14.0-4-amd64 Detailed observations: https://jira.mariadb.org/browse/MDEV-26674 The previous script has been adapted to use MariaDB-10.6 package and sysbench to demonstrate a workload, I've changed Marko's script to work with the distro packages and use innodb_use_native_aio=1. MariaDB packages: https://mariadb.org/download/?t=repo-config (needs a distro that has liburing userspace libraries as standard support) Script: https://jira.mariadb.org/secure/attachment/60358/Mariabench-MDEV-26674-io_uring-1 The state is achieved either when the sysbench prepare stalls, or the tps printed at 5 second intervals falls to 0.
