----
-# file: roles/performance_tuning/tasks/main.yaml
-
-- 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
- tags:
- - perf-inst-prerequisites
-
-- name: Conf - Turbo Boost
- import_tasks: turbo_boost.yaml
- when: >
- cpu_microarchitecture == "skylake" or
- cpu_microarchitecture == "cascadelake"
- tags:
- - perf-conf-turbo-boost
-
-- name: Conf - 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:
- - perf-conf-sysctl
-
-- name: Conf - 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:
- - perf-conf-sysctl
-
-- name: Conf - 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:
- - perf-conf-sysctl
-
-- name: Conf - 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:
- - perf-conf-sysctl
-
-- name: Conf - 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:
- - perf-conf-sysctl
-
-- name: Conf - 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:
- - perf-conf-sysctl
-
-- name: Conf - 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:
- - perf-conf-sysctl
-
-- name: Conf - Cpufrequtils
- copy:
- src: "files/cpufrequtils"
- dest: "/etc/default/cpufrequtils"
- owner: "root"
- group: "root"
- mode: 0644
- tags:
- - perf-conf-cpufrequtils
-
-- name: Conf - Irqbalance
- template:
- src: "files/irqbalance"
- dest: "/etc/default/irqbalance"
- owner: "root"
- group: "root"
- mode: 0644
- tags:
- - perf-conf-irqbalance
-
-- name: Conf - Set Ondemand Service To Disable
- service:
- name: "ondemand"
- enabled: "no"
- tags:
- - perf-conf-ondemand
-
-- name: Conf - Kernel Parameters
- lineinfile:
- path: "/etc/default/grub"
- state: "present"
- regexp: "^GRUB_CMDLINE_LINUX="
- line: "GRUB_CMDLINE_LINUX=\"{% for key, value in grub.items() %}{% if value is sameas true %}{{key}} {% else %}{{key}}={{value}} {% endif %}{% endfor %}\""
- notify:
- - "Update GRUB"
- tags:
- - perf-conf-grub
-
-- meta: flush_handlers
-
-- name: Conf - Load Kernel Modules By Default
- lineinfile:
- path: "/etc/modules"
- state: "present"
- line: "{{ item }}"
- with_items:
- - "vfio-pci"
- notify:
- - "Reboot Server"
- tags:
- - perf-conf-load-kernel-modules
-
-- meta: flush_handlers
\ No newline at end of file
Code Review / csit.git / blobdiff