span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">used_start</span><span class="o">/</span><span class="mi">1000</span>
        <span class="n">u_start_gb</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">used_start</span><span class="o">/</span><span class="mf">1.0e9</span>
        <span class="n">u_end_kb</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">used