unstable-periodic #4320

	name: unstable-periodic

	on:
	schedule:
	- cron: 45 0,4,8,12,16,20 * * *
	- cron: 29 8 * * * # about 1:29am PDT, for mem leak check and rerun disabled tests
	push:
	tags:
	- ciflow/unstable/*
	workflow_dispatch:

	concurrency:
	group: ${{ github.workflow }}-${{ github.event.pull_request.number \|\| github.ref_name }}-${{ github.ref_type == 'branch' && github.sha }}-${{ github.event_name == 'workflow_dispatch' }}-${{ github.event_name == 'schedule' }}-${{ github.event.schedule }}
	cancel-in-progress: true

	permissions: read-all

	jobs:
	# There must be at least one job here to satisfy GitHub action workflow syntax
	introduction:
	if: github.repository_owner == 'pytorch'
	runs-on: ubuntu-latest
	continue-on-error: true
	steps:
	- name: Introduce PyTorch unstable (periodic) workflow
	run: \|
	echo "PyTorch unstable workflow is used to host experimental or flaky jobs"
	echo " that needs to be run periodically, but doesn't impact trunk as part"
	echo " of the stable periodic workflows."
	echo
	echo "In addition, a new label called ciflow/unstable can be attached to the"
	echo " PR to trigger this workflow. That can be done either manually or"
	echo " automatically using PyTorch auto-label bot."
	echo
	echo "Once the jobs are deemed stable enough (% red signal < 5% and TTS < 3h),"
	echo " they can graduate and move back to periodic."

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