---
# file: roles/performance_tuning/tasks/main.yaml
-- name: Performance Tuning - Install Distribution - Release - Machine Prerequisites
+- name: Inst - Update Package Cache (APT)
+ apt:
+ update_cache: yes
+ cache_valid_time: 3600
+ when:
+ - ansible_distribution|lower == 'ubuntu'
+ tags:
+ - perf-inst-prerequisites
+
+- name: Inst - Machine Prerequisites
package:
name: "{{ packages | flatten(levels=1) }}"
state: latest
- update_cache: true
tags:
- - install-dependencies
+ - perf-inst-prerequisites
-- name: Performance Tuning - Configure {{ ansible_machine }} kernel parameters
+- name: Distribution - release - machine optimizations
+ include_tasks: '{{ ansible_distribution|lower }}_{{ ansible_distribution_release }}.yaml'
+ tags:
+ - machine-optimizations
+
+- name: Configure {{ ansible_machine }} Kernel Parameters
lineinfile:
path: "/etc/default/grub"
state: "present"
regexp: "^GRUB_CMDLINE_LINUX="
- line: {{ grub_cmdline_linux[ansible_machine] }}
+ line: "GRUB_CMDLINE_LINUX=\"{% for key, value in grub.items() %}{% if value %}{{key}}={{value}} {% else %}{{key}} {% endif %}{% endfor %}\""
notify:
- "Update GRUB"
- - "Reboot server"
tags:
- set-grub
-- name: Performance Tuning - Turbo boost
+- meta: flush_handlers
+
+- name: Turbo Boost
import_tasks: turbo_boost.yaml
when: >
cpu_microarchitecture == "skylake" or
tags:
- turbo-boost
-- name: Performance Tuning - Copy CSIT sysctl file
- template:
- src: "files/90-csit"
- dest: "/etc/sysctl.d/90-csit.conf"
- owner: "root"
- group: "root"
- mode: "0644"
+- name: Adjust nr_hugepages
+ # change the minimum size of the hugepage pool.
+ # 2G VPP, 4GB per VNF/CNF, 2G reserve
+ sysctl:
+ name: "vm.nr_hugepages"
+ value: "{{ sysctl.vm.nr_hugepages }}"
+ state: "present"
+ sysctl_file: "/etc/sysctl.d/90-csit.conf"
+ reload: "yes"
tags:
- - copy-90-csit
+ - set-sysctl
-- name: Performance Tuning - Copy cpufrequtils file
+- name: Adjust max_map_count
+ # this file contains the maximum number of memory map areas a process
+ # may have. memory map areas are used as a side-effect of calling
+ # malloc, directly by mmap and mprotect, and also when loading shared
+ # libraries.
+ #
+ # while most applications need less than a thousand maps, certain
+ # programs, particularly malloc debuggers, may consume lots of them,
+ # e.g., up to one or two maps per allocation.
+ # must be greater than or equal to (2 * vm.nr_hugepages).
+ sysctl:
+ name: "vm.max_map_count"
+ value: "{{ sysctl.vm.nr_hugepages * 4 }}"
+ state: "present"
+ sysctl_file: "/etc/sysctl.d/90-csit.conf"
+ reload: "yes"
+ tags:
+ - set-sysctl
+
+- name: Adjust hugetlb_shm_group
+ # hugetlb_shm_group contains group id that is allowed to create sysv
+ # shared memory segment using hugetlb page.
+ sysctl:
+ name: "vm.hugetlb_shm_group"
+ value: "1000"
+ state: "present"
+ sysctl_file: "/etc/sysctl.d/90-csit.conf"
+ reload: "yes"
+ tags:
+ - set-sysctl
+
+- name: Adjust swappiness
+ # this control is used to define how aggressive the kernel will swap
+ # memory pages. higher values will increase agressiveness, lower values
+ # decrease the amount of swap. a value of 0 instructs the kernel not to
+ # initiate swap until the amount of free and file-backed pages is less
+ # than the high water mark in a zone.
+ sysctl:
+ name: "vm.swappiness"
+ value: "0"
+ state: "present"
+ sysctl_file: "/etc/sysctl.d/90-csit.conf"
+ reload: "yes"
+ tags:
+ - set-sysctl
+
+- name: Adjust shmmax
+ # shared memory max must be greator or equal to the total size of hugepages.
+ # for 2mb pages, totalhugepagesize = vm.nr_hugepages * 2 * 1024 * 1024
+ # if the existing kernel.shmmax setting (cat /sys/proc/kernel/shmmax)
+ # is greater than the calculated totalhugepagesize then set this parameter
+ # to current shmmax value.
+ sysctl:
+ name: "kernel.shmmax"
+ value: "{{ sysctl.vm.nr_hugepages * 2 * 1024 * 1024 }}"
+ state: "present"
+ sysctl_file: "/etc/sysctl.d/90-csit.conf"
+ reload: "yes"
+ tags:
+ - set-sysctl
+
+- name: Adjust watchdog_cpumask
+ # this value can be used to control on which cpus the watchdog may run.
+ # the default cpumask is all possible cores, but if no_hz_full is
+ # enabled in the kernel config, and cores are specified with the
+ # nohz_full= boot argument, those cores are excluded by default.
+ # offline cores can be included in this mask, and if the core is later
+ # brought online, the watchdog will be started based on the mask value.
+ #
+ # typically this value would only be touched in the nohz_full case
+ # to re-enable cores that by default were not running the watchdog,
+ # if a kernel lockup was suspected on those cores.
+ sysctl:
+ name: "kernel.watchdog_cpumask"
+ value: "{{ sysctl.kernel.watchdog_cpumask }}"
+ state: "present"
+ sysctl_file: "/etc/sysctl.d/90-csit.conf"
+ reload: "yes"
+ tags:
+ - set-sysctl
+
+- name: Adjust randomize_va_space
+ # this option can be used to select the type of process address
+ # space randomization that is used in the system, for architectures
+ # that support this feature.
+ # 0 - turn the process address space randomization off. this is the
+ # default for architectures that do not support this feature anyways,
+ # and kernels that are booted with the "norandmaps" parameter.
+ sysctl:
+ name: "kernel.randomize_va_space"
+ value: "0"
+ state: "present"
+ sysctl_file: "/etc/sysctl.d/90-csit.conf"
+ reload: "yes"
+ tags:
+ - set-sysctl
+
+- name: Copy Cpufrequtils File
copy:
src: "files/cpufrequtils"
dest: "/etc/default/cpufrequtils"
tags:
- copy-cpufrequtils
-- name: Performance Tuning - Set ondemand service to disable
+- name: Copy Irqbalance File
+ template:
+ src: "files/irqbalance"
+ dest: "/etc/default/irqbalance"
+ owner: "root"
+ group: "root"
+ mode: "0644"
+ notify:
+ - "Update GRUB"
+ tags:
+ - copy-irqbalance
+
+- name: Set Ondemand Service To Disable
service:
name: "ondemand"
enabled: "no"
tags:
- set-ondemand
-- name: Performance Tuning - Load kernel modules by default
+- name: Load Kernel Modules By Default
lineinfile:
path: "/etc/modules"
state: "present"
Code Review / csit.git / blobdiff