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## perf-flame-graph-notes.md

      
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                trevnorris
                / perf-flame-graph-notes.md
            
            
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              December 24, 2023 05:25
            
              
                Quick steps of how to create a flame graph using perf
              
          
    The prep-script.sh will setup the latest Node and install the latest perf version on your Linux box.
When you want to generate the flame graph, run the following (folder locations taken from install script):
sudo sysctl kernel.kptr_restrict=0
# May also have to do the following:
# (additional reading http://unix.stackexchange.com/questions/14227/do-i-need-root-admin-permissions-to-run-userspace-perf-tool-perf-events-ar )
sudo sysctl kernel.perf_event_paranoid=0


## hack.sh
#!/usr/bin/env sh

##
# This is script with usefull tips taken from:
#   https://github.com/mathiasbynens/dotfiles/blob/master/.osx
#
# install it:
#   curl -sL https://raw.github.com/gist/2108403/hack.sh | sh
#

## slave_gevent.py
from __future__ import with_statement
from kombu import BrokerConnection
from collections import defaultdict
import gevent
from gevent import monkey
monkey.patch_all()

class WorkerHub():
    """
    WorkerHub controls the local mailboxes that the @worker decorator assigns.

## pymongo_example_with_db_ref.py
import pymongo
from pymongo import Connection
from pymongo.dbref import DBRef
from pymongo.database import Database

# connect
connection = Connection()
db = Database(connection, "things")

# clean up
	#!/usr/bin/env sh

	##
	# This is script with usefull tips taken from:
	# https://github.com/mathiasbynens/dotfiles/blob/master/.osx
	#
	# install it:
	# curl -sL https://raw.github.com/gist/2108403/hack.sh \| sh
	#
	from __future__ import with_statement
	from kombu import BrokerConnection
	from collections import defaultdict
	import gevent
	from gevent import monkey
	monkey.patch_all()

	class WorkerHub():
	"""
	WorkerHub controls the local mailboxes that the @worker decorator assigns.
	import pymongo
	from pymongo import Connection
	from pymongo.dbref import DBRef
	from pymongo.database import Database

	# connect
	connection = Connection()
	db = Database(connection, "things")

	# clean up