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mmtests: add AB testing and comparison support
This commit introduces comprehensive A/B testing and comparison capabilities for the mmtests workflow in kdevops, enabling performance regression detection between baseline and development kernels. Key Features Added: - A/B testing configuration support for mmtests workflow - Automated performance comparison between baseline and dev nodes - Visual performance analysis with graph generation - HTML reports with embedded performance graphs New Components: 1. Defconfigs: - mmtests-ab-testing: Basic A/B testing setup - mmtests-ab-testing-thpcompact: Advanced config with monitoring 2. Comparison Infrastructure (playbooks/roles/mmtests_compare/): - Automated result collection from baseline and dev nodes - Local mmtests repository management with patch support - Multiple comparison output formats (HTML, text, graphs) - Shell scripts for graph generation and HTML embedding 3. Playbook Integration: - mmtests-compare.yml: Orchestrates the comparison workflow - Updated mmtests.yml to target mmtests group specifically - Enhanced hosts template with localhost and mmtests group 4. Result Visualization: - Performance graphs (main, sorted, smoothed trends) - Monitor data visualization (vmstat, mpstat, proc stats) - Professional HTML reports with embedded graphs - Comprehensive comparison tables with statistical analysis 5. Workflow Enhancements: - Support for applying patches from fixes directory - Python script for advanced graph generation - Makefile targets for comparison workflow - Results organization in workflows/mmtests/results/ Technical Improvements: - Added localhost to mmtests hosts template for local operations - Added dedicated mmtests group definition in hosts template - Support for applying patches from fixes directory - Robust error handling in comparison scripts - Dependency management for Perl and Python tools - Temporary file management in /tmp for comparisons Included Patches: - Fix undefined array reference in mmtests compare - Fix library order in thpcompact gcc command The implementation supports the standard kdevops A/B testing pattern where baseline nodes run the stable kernel and dev nodes run the development kernel, with automated comparison and visualization of performance differences between them. Usage: make defconfig-mmtests-ab-testing make bringup make mmtests make mmtests-compare This enables developers to quickly identify performance regressions and improvements between kernel versions with professional-quality reports and visualizations. Generated-by: Claude AI Signed-off-by: Luis Chamberlain <[email protected]>
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‎.gitignore‎

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@@ -67,6 +67,8 @@ workflows/ltp/results/
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workflows/nfstest/results/
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workflows/sysbench/results/
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workflows/mmtests/results/
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tmp
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playbooks/roles/linux-mirror/linux-mirror-systemd/*.service
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playbooks/roles/linux-mirror/linux-mirror-systemd/*.timer

‎defconfigs/mmtests-ab-testing‎

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CONFIG_GUESTFS=y
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CONFIG_LIBVIRT=y
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CONFIG_WORKFLOWS=y
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CONFIG_WORKFLOW_LINUX_CUSTOM=y
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CONFIG_BOOTLINUX=y
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# Enable baseline and dev testing
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CONFIG_KDEVOPS_BASELINE_AND_DEV=y
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# Enable mmtests workflow
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CONFIG_WORKFLOWS_TESTS=y
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CONFIG_WORKFLOWS_LINUX_TESTS=y
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CONFIG_WORKFLOWS_DEDICATED_WORKFLOW=y
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CONFIG_KDEVOPS_WORKFLOW_DEDICATE_MMTESTS=y
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# mmtests configuration - using defaults
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CONFIG_MMTESTS_ENABLE_THPCOMPACT=y
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# Filesystem for tests
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CONFIG_MMTESTS_FS_XFS=y

‎defconfigs/mmtests-ab-testing-thpcompact‎

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CONFIG_GUESTFS=y
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CONFIG_LIBVIRT=y
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CONFIG_WORKFLOWS=y
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CONFIG_WORKFLOW_LINUX_CUSTOM=y
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CONFIG_BOOTLINUX=y
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# Enable baseline and dev testing
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CONFIG_KDEVOPS_BASELINE_AND_DEV=y
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# Enable A/B testing with different kernel references
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CONFIG_BOOTLINUX_AB_DIFFERENT_REF=y
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# Enable mmtests workflow
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CONFIG_WORKFLOWS_TESTS=y
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CONFIG_WORKFLOWS_LINUX_TESTS=y
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CONFIG_WORKFLOWS_DEDICATED_WORKFLOW=y
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CONFIG_KDEVOPS_WORKFLOW_DEDICATE_MMTESTS=y
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# mmtests configuration
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CONFIG_MMTESTS_ENABLE_THPCOMPACT=y
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CONFIG_MMTESTS_ITERATIONS=5
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CONFIG_MMTESTS_MONITOR_INTERVAL=1
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CONFIG_MMTESTS_MONITOR_ENABLE_FTRACE=y
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CONFIG_MMTESTS_MONITOR_ENABLE_PROC_MONITORING=y
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CONFIG_MMTESTS_MONITOR_ENABLE_MPSTAT=y
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CONFIG_MMTESTS_PRETEST_THP_SETTING="always"
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# Filesystem for tests
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CONFIG_MMTESTS_FS_XFS=y

‎playbooks/mmtests-compare.yml‎

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---
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- hosts: localhost
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roles:
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- role: mmtests_compare
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when: kdevops_baseline_and_dev|bool

‎playbooks/mmtests.yml‎

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---
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- hosts: all
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- hosts: mmtests
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roles:
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- role: mmtests

‎playbooks/roles/gen_hosts/templates/mmtests.j2‎

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[all]
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localhost ansible_connection=local
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{% for test_type in mmtests_enabled_test_types %}
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{{ kdevops_host_prefix }}-{{ test_type }}
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{% if kdevops_baseline_and_dev %}
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{% endif %}
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[dev:vars]
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ansible_python_interpreter = "{{ kdevops_python_interpreter }}"
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[mmtests]
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{% for test_type in mmtests_enabled_test_types %}
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{{ kdevops_host_prefix }}-{{ test_type }}
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{% if kdevops_baseline_and_dev %}
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{{ kdevops_host_prefix }}-{{ test_type }}-dev
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{% endif %}
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{% endfor %}
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[mmtests:vars]
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ansible_python_interpreter = "{{ kdevops_python_interpreter }}"

‎playbooks/roles/mmtests/tasks/main.yaml‎

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path: "{{ data_path }}"
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owner: "{{ data_user }}"
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group: "{{ data_group }}"
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recurse: yes
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state: directory
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- name: Clone mmtests repository
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version: "{{ mmtests_git_version }}"
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force: yes
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- name: Check if mmtests fixes directory exists
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tags: [ 'setup' ]
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delegate_to: localhost
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stat:
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path: "{{ topdir_path }}/workflows/mmtests/fixes/"
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register: fixes_dir
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run_once: false
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- name: Find mmtests patches in fixes directory
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tags: [ 'setup' ]
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delegate_to: localhost
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find:
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paths: "{{ topdir_path }}/workflows/mmtests/fixes/"
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patterns: "*.patch"
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register: mmtests_patches
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when: fixes_dir.stat.exists
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run_once: false
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- name: Copy patches to remote host
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tags: [ 'setup' ]
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become: yes
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become_method: sudo
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copy:
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src: "{{ item.path }}"
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dest: "/tmp/{{ item.path | basename }}"
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mode: '0644'
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with_items: "{{ mmtests_patches.files }}"
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when:
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- fixes_dir.stat.exists
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- mmtests_patches.files | length > 0
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- name: Apply mmtests patches on remote host
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tags: [ 'setup' ]
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become: yes
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become_method: sudo
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shell: |
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cd {{ mmtests_data_dir }}
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git am /tmp/{{ item.path | basename }}
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with_items: "{{ mmtests_patches.files }}"
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when:
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- fixes_dir.stat.exists
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- mmtests_patches.files | length > 0
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ignore_errors: true
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register: patch_results
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- name: Report patch application results
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tags: [ 'setup' ]
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debug:
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msg: |
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Applied {{ mmtests_patches.files | length | default(0) }} patches from fixes directory:
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{% for patch in mmtests_patches.files | default([]) %}
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- {{ patch.path | basename }}
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{% endfor %}
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when:
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- fixes_dir.stat.exists
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- mmtests_patches.files | length > 0
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- name: Generate mmtests configuration
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tags: [ 'setup' ]
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become: yes

‎playbooks/roles/mmtests_compare/defaults/main.yml‎

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---
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# mmtests compare role defaults
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mmtests_data_dir: "{{ data_path }}/mmtests"
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mmtests_results_dir: "{{ mmtests_data_dir }}/work/log/{{ inventory_hostname }}-{{ kernel_version.stdout }}"
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# Git URL is from extra_vars.yaml, fallback to GitHub
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mmtests_git_url: "{{ mmtests_git_url | default('https://github.com/gormanm/mmtests.git') }}"

‎playbooks/roles/mmtests_compare/files/apply_patch.sh‎

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#!/bin/bash
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# Script to apply mmtests patches with proper error handling
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TOPDIR="$1"
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PATCH_FILE="$2"
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cd "$TOPDIR/tmp/mmtests" || exit 1
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PATCH_NAME=$(basename "$PATCH_FILE")
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# Check if patch is already applied by looking for the specific fix
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if grep -q "if (@operations > 0 && exists" bin/lib/MMTests/Compare.pm 2>/dev/null; then
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echo "Patch $PATCH_NAME appears to be already applied"
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exit 0
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fi
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# Try to apply with git apply first
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if git apply --check "$PATCH_FILE" 2>/dev/null; then
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git apply "$PATCH_FILE"
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echo "Applied patch with git: $PATCH_NAME"
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exit 0
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fi
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# Try with patch command as fallback
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if patch -p1 --dry-run < "$PATCH_FILE" >/dev/null 2>&1; then
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patch -p1 < "$PATCH_FILE"
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echo "Applied patch with patch command: $PATCH_NAME"
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exit 0
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fi
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echo "Failed to apply $PATCH_NAME - may already be applied or conflicting"
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exit 0 # Don't fail the playbook

‎playbooks/roles/mmtests_compare/files/embed_graphs_in_html.sh‎

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#!/bin/bash
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# Script to embed graphs in the comparison HTML
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COMPARISON_HTML="$1"
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COMPARE_DIR="$2"
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# Check if comparison.html exists
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if [ ! -f "$COMPARISON_HTML" ]; then
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echo "ERROR: $COMPARISON_HTML not found"
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exit 1
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fi
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# Create a backup of the original
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cp "$COMPARISON_HTML" "${COMPARISON_HTML}.bak"
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# Create new HTML with embedded graphs
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{
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echo '<!DOCTYPE html>'
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echo '<html><head>'
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echo '<title>mmtests Comparison with Graphs</title>'
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echo '<style>'
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echo 'body { font-family: Arial, sans-serif; margin: 20px; background-color: #f5f5f5; }'
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echo '.container { max-width: 1400px; margin: 0 auto; background: white; padding: 30px; border-radius: 10px; box-shadow: 0 0 20px rgba(0,0,0,0.1); }'
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echo '.resultsTable { border-collapse: collapse; width: 100%; margin: 20px 0; }'
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echo '.resultsTable th { background-color: #3498db; color: white; padding: 10px; text-align: center; font-weight: bold; }'
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echo '.resultsTable td { padding: 8px; text-align: right; font-family: monospace; border-bottom: 1px solid #ddd; }'
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echo '.resultsTable tr:nth-child(odd) { background: #f9f9f9; }'
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echo '.graph-section { background: #ecf0f1; padding: 20px; border-radius: 10px; margin: 20px 0; }'
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echo '.graph-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(500px, 1fr)); gap: 20px; }'
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echo '.graph-item { text-align: center; }'
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echo '.graph-item img { max-width: 100%; height: auto; border: 1px solid #ddd; border-radius: 5px; box-shadow: 0 2px 10px rgba(0,0,0,0.1); }'
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echo 'h1 { color: #2c3e50; text-align: center; border-bottom: 3px solid #3498db; padding-bottom: 10px; }'
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echo 'h2 { color: #34495e; border-left: 4px solid #3498db; padding-left: 15px; }'
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echo 'h3 { color: #34495e; font-size: 1.1em; }'
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echo '</style>'
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echo '</head><body>'
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echo '<div class="container">'
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echo '<h1>mmtests Performance Comparison</h1>'
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# Add graphs section if any graphs exist
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if ls "$COMPARE_DIR"/*.png >/dev/null 2>&1; then
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echo '<div class="graph-section">'
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echo '<h2>Performance Graphs</h2>'
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echo '<div class="graph-grid">'
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# Main benchmark graph first
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for graph in "$COMPARE_DIR"/graph-*compact.png; do
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if [ -f "$graph" ] && [[ ! "$graph" =~ -sorted|-smooth ]]; then
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echo '<div class="graph-item">'
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echo '<h3>Main Performance Comparison</h3>'
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echo "<img src='$(basename "$graph")' alt='Main Performance'>"
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echo '</div>'
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fi
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done
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# Sorted graph
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if [ -f "$COMPARE_DIR/graph-thpcompact-sorted.png" ]; then
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echo '<div class="graph-item">'
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echo '<h3>Sorted Samples</h3>'
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echo '<img src="graph-thpcompact-sorted.png" alt="Sorted Samples">'
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echo '</div>'
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fi
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# Smooth graph
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if [ -f "$COMPARE_DIR/graph-thpcompact-smooth.png" ]; then
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echo '<div class="graph-item">'
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echo '<h3>Smoothed Trend</h3>'
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echo '<img src="graph-thpcompact-smooth.png" alt="Smoothed Trend">'
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echo '</div>'
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fi
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# Any monitor graphs
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for graph in "$COMPARE_DIR"/graph-vmstat.png "$COMPARE_DIR"/graph-proc-vmstat.png "$COMPARE_DIR"/graph-mpstat.png; do
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if [ -f "$graph" ]; then
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graphname=$(basename "$graph" .png | sed 's/graph-//')
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echo '<div class="graph-item">'
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echo "<h3>${graphname^^} Monitor</h3>"
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echo "<img src='$(basename "$graph")' alt='$graphname'>"
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echo '</div>'
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fi
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done
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echo '</div>'
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echo '</div>'
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fi
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# Add the original comparison table
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echo '<div class="graph-section">'
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echo '<h2>Detailed Comparison Table</h2>'
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cat "$COMPARISON_HTML"
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echo '</div>'
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echo '</div></body></html>'
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} > "${COMPARISON_HTML}.new"
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# Replace the original with the new version
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mv "${COMPARISON_HTML}.new" "$COMPARISON_HTML"
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echo "Graphs embedded in $COMPARISON_HTML"
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exit 0

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