Module: HttpLoader::Harness::Formatter

Extended by:
T::Helpers, T::Sig
Included in:
HttpLoader::Harness
Defined in:
lib/http_loader/harness/formatter.rb

Overview

Formatter handles printing load test statistics dynamically and robustly.

Instance Method Summary collapse

Instance Method Details

#extract_client_stats ⇒ Object 



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# File 'lib/http_loader/harness/formatter.rb', line 75

def extract_client_stats
  c_cpu, c_mem, _c_kb, c_th = @monitor.process_stats(@pm.client_pid)
  active_c = @monitor.count_established_connections(@pm.client_pid)
  [active_c, c_cpu, c_th, c_mem]
end

#extract_server_stats ⇒ Object 



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# File 'lib/http_loader/harness/formatter.rb', line 67

def extract_server_stats
  s_cpu, s_mem, s_kb, s_th = @monitor.process_stats(@pm.server_pid)
  active_s = @monitor.count_established_connections(@pm.server_pid)
  s_conn = format_kb_conn(s_kb, active_s, @pm.server_pid)
  [s_cpu, s_mem, s_th, s_conn]
end

#format_kb_conn(kilo, connections, pid) ⇒ Object 



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# File 'lib/http_loader/harness/formatter.rb', line 46

def format_kb_conn(kilo, connections, pid)
  return 'EXTERNAL' if pid.nil?
  return 'N/A' if connections.zero? || connections.negative?

  "#{(kilo / connections).round(2)} KB"
end

#log_table_row(params) ⇒ Object 



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# File 'lib/http_loader/harness/formatter.rb', line 39

def log_table_row(params)
  puts format('%<t>-10s | %<ac>-11s | %<sc>-16s | %<sm>-14s | %<sk>-14s | %<cc>-16s | %<cm>-14s | %<ck>-14s',
              t: params[:t], ac: params[:ac], sc: params[:sc], sm: params[:sm],
              sk: params[:sk], cc: params[:cc], cm: params[:cm], ck: params[:ck])
end

#print_combined_stats(active, c_cpu, c_th, c_m) ⇒ Object 



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# File 'lib/http_loader/harness/formatter.rb', line 54

def print_combined_stats(active, c_cpu, c_th, c_m)
  s_cpu, s_mem, s_th, s_conn = extract_server_stats
  _cc, _cm, c_kb, _ct = @monitor.process_stats(@pm.client_pid)
  c_conn = format_kb_conn(c_kb, active, @pm.client_pid)

  log_table_row(
    t: Time.now.utc.strftime('%H:%M:%S'), ac: active.to_s,
    sc: "#{s_cpu}% / #{s_th}", sm: s_mem, sk: s_conn,
    cc: "#{c_cpu}% / #{c_th}", cm: c_m, ck: c_conn
  )
end

#print_startup_banner ⇒ Object 



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# File 'lib/http_loader/harness/formatter.rb', line 16

def print_startup_banner
  msg = if @config.target_urls.size > 1
          "**MULTIPLE TARGETS** (#{@config.target_urls.size} URLs)."
        elsif @config.target_urls.size == 1
          "**EXTERNAL URL** #{@config.target_urls.first}."
        elsif @config.use_https
          '**HTTPS**.'
        else
          '**HTTP**.'
        end
  puts "[Harness] Starting test with #{@config.connections} connections to #{msg}"
end

#print_table_header ⇒ Object 



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# File 'lib/http_loader/harness/formatter.rb', line 30

def print_table_header
  puts '[Harness] Monitoring resources (Press Ctrl+C to stop)...'
  puts '-' * 125
  puts 'Time (UTC) | Real Conns  | Srv CPU/Thrds    | Srv Mem        | Srv Mem/Conn   | ' \
       'Cli CPU/Thrds    | Cli Mem        | Cli Mem/Conn  '
  puts '-' * 125
end