Re: [Jack-Devel] advice on xruns

On Sun, 2019-07-28 at 11:19 +0200, Holger Marzen wrote: So in the meantime you already found the kernel-parameter and the detailed information by the kernel docs, that I didn't know :). You could use ½ of the frames, 12 instead of 24, just by disabling audit, too? What kernel are you using? I should consider to test disabling spectre mitigations and audit by kernel parameters, too. Until now I didn't make much tests, for example just: [rocketmouse@archlinux ~]$ uname -rm 4.19.59-rt24-0-securityink x86_64 [rocketmouse@archlinux ~]$ grep CONFIG_AUDIT= /usr/lib/modules/$(uname -r)/build/.config CONFIG_AUDIT=y [rocketmouse@archlinux ~]$ cat /sys/devices/system/cpu/vulnerabilities/* Mitigation: PTE Inversion; VMX: conditional cache flushes, SMT disabled Mitigation: Clear CPU buffers; SMT disabled Mitigation: PTI Mitigation: Speculative Store Bypass disabled via prctl and seccomp Mitigation: __user pointer sanitization Mitigation: Full generic retpoline, IBPB: conditional, IBRS_FW, STIBP: disabled, RSB filling [rocketmouse@archlinux ~]$ grep LABEL\ Securityink /boot/syslinux/syslinux.cfg -A4 LABEL Securityink MENU LABEL Arch Linux Rt ^Securityink LINUX ../vmlinuz-linux-rt-securityink APPEND root=LABEL=s3.archlinux ro INITRD ../intel-ucode.img,../initramfs-linux-rt-securityink.img -- LABEL Securityink_no_micro MENU LABEL Arch Linux Rt Securityink no micro LINUX ../vmlinuz-linux-rt-securityink APPEND root=LABEL=s3.archlinux ro INITRD ../initramfs-linux-rt-securityink.img -- LABEL Securityink_nopti MENU LABEL Arch Linux Rt Securityink nopt^i LINUX ../vmlinuz-linux-rt-securityink APPEND root=LABEL=s3.archlinux ro nopti INITRD ../intel-ucode.img,../initramfs-linux-rt-securityink.img [rocketmouse@archlinux ~]$ hwinfo --cpu | grep Model | sort -u Model: 6.60.3 "Intel(R) Celeron(R) CPU G1840 @ 2.80GHz" -- pacman -Q linux{,-rt{-cornflower,-pussytoes,,-securityink}}|cut -d\ -f2 5.2.3.arch1-1 5.2_rt1-0 5.0.21_rt16-1 5.0.19_rt11-1 4.19.59_rt24-0