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|
---
# 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
|
