deploy: fad2b57

Author: simongravelle

_sources/oar.rst.txt

@@ -74,4 +74,60 @@ Here, tips to efficiently launch multiple jobs are provided.
 
     id=`echo "$OAR_JOB_ID - $OAR_ARRAY_ID + 2" | bc -l`  # <---- This id runs from 0 to 50, each job gets one, with which you can e.g. index a bash array
     temperatures=(0.25 0.5 1 .... )
-    T=${temperatures[${id}]}
+    T=${temperatures[${id}]}
+
+Measure the CPU Usage per User
+------------------------------
+
+This script calculates the total CPU core usage per user based on job information
+from the `oarstat` command. The output will list each user along with the total
+number of CPU cores they are using.
+
+Create a Bash Script (for instance named `cpu_usage.sh`), and copy the
+following lines into the file:
+
+.. code:: bash
+
+    #!/bin/bash
+
+    # Run oarstat and process its output to count the total cores per user
+    oarstat | awk '
+        # Only process lines that start with a job number (indicating a valid job line)
+        /^[0-9]+/ {
+            # $3 is the user, and we look for "R=" to get the core count from any field
+            for (i=1; i<=NF; i++) {
+                if ($i ~ /^R=[0-9]+/) {
+                    # Extract the core count from the "R=" field
+                    split($i, core_count, "=")
+                    user_cores[$3] += core_count[2]  # Accumulate the core count for the user
+                }
+            }
+        }
+        # After processing all lines, print the total cores for each user
+        END {
+            for (user in user_cores) {
+                print user, user_cores[user]  # Output user and their total core count
+            }
+        }
+    ' | sort  # Sort the output alphabetically by username
+
+Run the following command to give execution permissions to the script:
+
+.. code:: bash
+
+    chmod +x cpu_usage.sh
+    ./cpu_usage.sh
+
+It will return something like:
+
+.. code:: bash
+
+    calvof 83
+    farutial 2
+    gravells 160
+    joyeuxm 280
+    jungg 145
+    mhirizn- 3
+    nagasawt 1
+    ozawam 53
+    quilliec 2

oar.html

@@ -176,6 +176,55 @@ <h2>Launch Multiple Jobs<a class="headerlink" href="#launch-multiple-jobs" title
 </pre></div>
 </div>
 </section>
+<section id="measure-the-cpu-usage-per-user">
+<h2>Measure the CPU Usage per User<a class="headerlink" href="#measure-the-cpu-usage-per-user" title="Link to this heading">¶</a></h2>
+<p>This script calculates the total CPU core usage per user based on job information
+from the <cite>oarstat</cite> command. The output will list each user along with the total
+number of CPU cores they are using.</p>
+<p>Create a Bash Script (for instance named <cite>cpu_usage.sh</cite>), and copy the
+following lines into the file:</p>
+<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span><span class="ch">#!/bin/bash</span>
+
+<span class="c1"># Run oarstat and process its output to count the total cores per user</span>
+oarstat<span class="w"> </span><span class="p">|</span><span class="w"> </span>awk<span class="w"> </span><span class="s1">&#39;</span>
+<span class="s1">    # Only process lines that start with a job number (indicating a valid job line)</span>
+<span class="s1">    /^[0-9]+/ {</span>
+<span class="s1">        # $3 is the user, and we look for &quot;R=&quot; to get the core count from any field</span>
+<span class="s1">        for (i=1; i&lt;=NF; i++) {</span>
+<span class="s1">            if ($i ~ /^R=[0-9]+/) {</span>
+<span class="s1">                # Extract the core count from the &quot;R=&quot; field</span>
+<span class="s1">                split($i, core_count, &quot;=&quot;)</span>
+<span class="s1">                user_cores[$3] += core_count[2]  # Accumulate the core count for the user</span>
+<span class="s1">            }</span>
+<span class="s1">        }</span>
+<span class="s1">    }</span>
+<span class="s1">    # After processing all lines, print the total cores for each user</span>
+<span class="s1">    END {</span>
+<span class="s1">        for (user in user_cores) {</span>
+<span class="s1">            print user, user_cores[user]  # Output user and their total core count</span>
+<span class="s1">        }</span>
+<span class="s1">    }</span>
+<span class="s1">&#39;</span><span class="w"> </span><span class="p">|</span><span class="w"> </span>sort<span class="w">  </span><span class="c1"># Sort the output alphabetically by username</span>
+</pre></div>
+</div>
+<p>Run the following command to give execution permissions to the script:</p>
+<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>chmod<span class="w"> </span>+x<span class="w"> </span>cpu_usage.sh
+./cpu_usage.sh
+</pre></div>
+</div>
+<p>It will return something like:</p>
+<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>calvof<span class="w"> </span><span class="m">83</span>
+farutial<span class="w"> </span><span class="m">2</span>
+gravells<span class="w"> </span><span class="m">160</span>
+joyeuxm<span class="w"> </span><span class="m">280</span>
+jungg<span class="w"> </span><span class="m">145</span>
+mhirizn-<span class="w"> </span><span class="m">3</span>
+nagasawt<span class="w"> </span><span class="m">1</span>
+ozawam<span class="w"> </span><span class="m">53</span>
+quilliec<span class="w"> </span><span class="m">2</span>
+</pre></div>
+</div>
+</section>
 </section>
 
 </main>
@@ -198,6 +247,7 @@ <h2>Launch Multiple Jobs<a class="headerlink" href="#launch-multiple-jobs" title
 <li><a class="reference internal" href="#cancel-all-your-jobs-at-once">Cancel All Your Jobs at Once</a></li>
 <li><a class="reference internal" href="#record-the-last-job-id-and-state">Record the last Job ID and state</a></li>
 <li><a class="reference internal" href="#launch-multiple-jobs">Launch Multiple Jobs</a></li>
+<li><a class="reference internal" href="#measure-the-cpu-usage-per-user">Measure the CPU Usage per User</a></li>
 </ul>
 </li>
 </ul>