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diff --git a/docs/report/introduction/environment/sut_conf_1.rst b/docs/report/introduction/environment/sut_conf_1.rst new file mode 100644 index 0000000000..7f724dd6ea --- /dev/null +++ b/docs/report/introduction/environment/sut_conf_1.rst @@ -0,0 +1,53 @@ +SUT Settings - Linux +-------------------- + +System provisioning is done by combination of PXE boot unattented +install and +`Ansible <https://www.ansible.com>`_ described in `CSIT Testbed Setup`_. + +Linux Boot Parameters +~~~~~~~~~~~~~~~~~~~~~ + +- **isolcpus=<cpu number>-<cpu number>** used for all cpu cores apart from + first core of each socket used for running VPP worker threads and Qemu/LXC + processes + https://www.kernel.org/doc/Documentation/admin-guide/kernel-parameters.txt +- **intel_pstate=disable** - [X86] Do not enable intel_pstate as the default + scaling driver for the supported processors. Intel P-State driver decide what + P-state (CPU core power state) to use based on requesting policy from the + cpufreq core. [X86 - Either 32-bit or 64-bit x86] + https://www.kernel.org/doc/Documentation/cpu-freq/intel-pstate.txt +- **nohz_full=<cpu number>-<cpu number>** - [KNL,BOOT] In kernels built with + CONFIG_NO_HZ_FULL=y, set the specified list of CPUs whose tick will be stopped + whenever possible. The boot CPU will be forced outside the range to maintain + the timekeeping. The CPUs in this range must also be included in the + rcu_nocbs= set. Specifies the adaptive-ticks CPU cores, causing kernel to + avoid sending scheduling-clock interrupts to listed cores as long as they have + a single runnable task. [KNL - Is a kernel start-up parameter, SMP - The + kernel is an SMP kernel]. + https://www.kernel.org/doc/Documentation/timers/NO_HZ.txt +- **rcu_nocbs** - [KNL] In kernels built with CONFIG_RCU_NOCB_CPU=y, set the + specified list of CPUs to be no-callback CPUs, that never queue RCU callbacks + (read-copy update). + https://www.kernel.org/doc/Documentation/admin-guide/kernel-parameters.txt +- **numa_balancing=disable** - [KNL,X86] Disable automatic NUMA balancing. +- **intel_iommu=enable** - [DMAR] Enable Intel IOMMU driver (DMAR) option. +- **iommu=on, iommu=pt** - [x86, IA-64] Disable IOMMU bypass, using IOMMU for + PCI devices. +- **nmi_watchdog=0** - [KNL,BUGS=X86] Debugging features for SMP kernels. Turn + hardlockup detector in nmi_watchdog off. +- **nosoftlockup** - [KNL] Disable the soft-lockup detector. +- **tsc=reliable** - Disable clocksource stability checks for TSC. + [x86] reliable: mark tsc clocksource as reliable, this disables clocksource + verification at runtime, as well as the stability checks done at bootup. + Used to enable high-resolution timer mode on older hardware, and in + virtualized environment. +- **hpet=disable** - [X86-32,HPET] Disable HPET and use PIT instead. + +Hugepages Configuration +~~~~~~~~~~~~~~~~~~~~~~~ + +Huge pages are managed via sysctl configuration located in +`/etc/sysctl.d/90-csit.conf` on each testbed. Default huge page size is 2M. +The exact amount of huge pages depends on testbed. All the values are defined +in `Ansible inventory - hosts` files. |