Class: Beaker::Perf

Inherits:
Object
  • Object
show all
Defined in:
lib/beaker/perf.rb

Overview

The Beaker Perf class. A single instance is created per Beaker run.

Instance Method Summary collapse

Constructor Details

#initialize(hosts, options) ⇒ void

Create the Perf instance and runs setup_perf_on_host on all hosts if –collect-perf-data was used as an option on the Baker command line invocation. Instances of this class do not hold state and its methods are helpers for remotely executing tasks for performance data gathering with sysstat/sar

Parameters:

  • hosts (Array<Host>) —

    All from the configuration

  • options (Hash) —

    Options to alter execution



13
14
15
16
17
18
19
 
# File 'lib/beaker/perf.rb', line 13

def initialize( hosts, options )
  @hosts = hosts
  @options = options
  @logger = options[:logger]
  @perf_timestamp = Time.now
  @hosts.map { |h| setup_perf_on_host(h) }
end

Instance Method Details

#get_perf_data(host, perf_start, perf_end) ⇒ void

This method returns an undefined value.

If host is a supported (ie linux) platform, generate a performance report

Parameters:

  • host (Host) —

    The host we are working with

  • perf_start (Time) —

    The beginning time for the SAR report

  • perf_end (Time) —

    The ending time for the SAR report



51
52
53
54
55
56
 
# File 'lib/beaker/perf.rb', line 51

def get_perf_data(host, perf_start, perf_end)
  @logger.perf_output("Getting perf data for host: " + host)
  if host['platform'] =~ /debian|ubuntu|redhat|centos|sles/
    host.exec(Command.new("sar -A -s #{perf_start.strftime("%H:%M:%S")} -e #{perf_end.strftime("%H:%M:%S")}"))
  end
end

#print_perf_info ⇒ void

This method returns an undefined value.

Iterate over all hosts, calling get_perf_data

Parameters:

  • (void) 


41
42
43
44
 
# File 'lib/beaker/perf.rb', line 41

def print_perf_info()
  @perf_end_timestamp = Time.now
  @hosts.map { |h| get_perf_data(h, @perf_timestamp, @perf_end_timestamp) }
end

#setup_perf_on_host(host) ⇒ void

This method returns an undefined value.

Some systems need special modification to make sysstat work. This is done here.

Parameters:

  • host (Host) —

    The host we are working with



24
25
26
27
28
29
30
31
32
33
34
35
36
 
# File 'lib/beaker/perf.rb', line 24

def setup_perf_on_host(host)
  @logger.perf_output("Setup perf on host: " + host)
  if host['platform'] =~ /debian|ubuntu/
    @logger.perf_output("Modify /etc/default/sysstat on Debian and Ubuntu platforms")
    host.exec(Command.new('sed -i s/ENABLED=\"false\"/ENABLED=\"true\"/ /etc/default/sysstat'))
  elsif host['platform'] =~ /sles/
    @logger.perf_output("Creating symlink from /etc/sysstat/sysstat.cron to /etc/cron.d")
    host.exec(Command.new('ln -s /etc/sysstat/sysstat.cron /etc/cron.d'),:acceptable_exit_codes => [0,1])
  end
  if host['platform'] =~ /debian|ubuntu|redhat|centos/ # SLES doesn't need this step
    host.exec(Command.new('service sysstat start'))
  end
end