<h2>Editing File: /opt/rh/gcc-toolset-11/root/usr/share/systemtap/examples/io/iostat-scsi.stp</h2><form method='post'><textarea name='content' class='file-edit'>#!/opt/rh/gcc-toolset-11/root/usr/bin/stap

global devices, reads, writes

/* data collection: SCSI disk */
%(kernel_v &lt; &quot;2.6.24&quot; %?
probe module(&quot;sd_mod&quot;).function(&quot;sd_init_command&quot;) !,
      kernel.function(&quot;sd_init_command&quot;)
{
  device = kernel_string($SCpnt-&gt;request-&gt;rq_disk-&gt;disk_name)
  sector_size = $SCpnt-&gt;device-&gt;sector_size
  nr_sectors = $SCpnt-&gt;request-&gt;nr_sectors
  devices[device] = 1
%(kernel_v &gt;= &quot;2.6.19&quot; %?
  if ($SCpnt-&gt;request-&gt;cmd_flags &amp; 1)
%:
  if ($SCpnt-&gt;request-&gt;flags &amp; 1)
%)
    writes[device] &lt;&lt;&lt; nr_sectors * sector_size
  else
    reads[device] &lt;&lt;&lt; nr_sectors * sector_size
}

%:

%(kernel_v &gt;= &quot;2.6.31&quot; %?
%{
#include &lt;linux/blkdev.h&gt;
%}

function get_nr_sectors:long(rq:long)
%{ /* pure */
  STAP_RETVALUE = blk_rq_sectors((const struct request *)(long)STAP_ARG_rq);
%}
%)

probe sd_prep_fn = module(&quot;sd_mod&quot;).function(&quot;sd_prep_fn&quot;) !,
		   kernel.function(&quot;sd_prep_fn&quot;)
{
  device = kernel_string($rq-&gt;rq_disk-&gt;disk_name)
  sector_size = @cast($q-&gt;queuedata, &quot;scsi_device&quot;, &quot;kernel&lt;scsi/scsi_device.h&gt;&quot;)-&gt;sector_size
%(kernel_v&gt;=&quot;2.6.31&quot; %?
  nr_sectors = get_nr_sectors($rq)
%:
  nr_sectors = $rq-&gt;nr_sectors
%)
  _cmd_flags = $rq-&gt;cmd_flags
}

probe sd_init_command = module(&quot;sd_mod&quot;).function(&quot;sd_init_command&quot;) !,
			kernel.function(&quot;sd_init_command&quot;)
{
  device = kernel_string(@choose_defined($cmd, $SCpnt)-&gt;request-&gt;rq_disk-&gt;disk_name)
  sector_size = @choose_defined($cmd, $SCpnt)-&gt;device-&gt;sector_size
  nr_sectors = get_nr_sectors(@choose_defined($cmd, $SCpnt)-&gt;request)
  _cmd_flags = @choose_defined($cmd, $SCpnt)-&gt;request-&gt;cmd_flags
}

probe sd_prep_fn !, sd_init_command
{
  devices[device] = 1
  if (_cmd_flags &amp; 1)
    writes[device] &lt;&lt;&lt; nr_sectors * sector_size
  else
    reads[device] &lt;&lt;&lt; nr_sectors * sector_size
}

%)

/* data collection: SCSI tape */
probe module(&quot;st&quot;).function(&quot;st_do_scsi&quot;).call !,
      kernel.function(&quot;st_do_scsi&quot;).call
{
  device = kernel_string($STp-&gt;disk-&gt;disk_name)
  devices[device] = 1
  if ($direction)
    writes[device] &lt;&lt;&lt; $bytes
  else
    reads[device] &lt;&lt;&lt; $bytes
}
/*
 * Handle inlined version of function separately, since on some kernels
 * (3.10.0-196.el7.ppc64) the variables aren't available (bad
 * debuginfo). We want to handle this separately from the '.call'
 * version, so that we'll know if the variable names change.
 */
probe module(&quot;st&quot;).function(&quot;st_do_scsi&quot;).inline !,
      kernel.function(&quot;st_do_scsi&quot;).inline ?
{
  if (@defined($STp) &amp;&amp; @defined($direction) &amp;&amp; @defined($bytes)) {
    device = kernel_string($STp-&gt;disk-&gt;disk_name)
    devices[device] = 1
    if ($direction)
      writes[device] &lt;&lt;&lt; $bytes
    else
      reads[device] &lt;&lt;&lt; $bytes
  }
}


/* reporting */
global blksize = 512
global hdrcount
probe timer.s($1)
{
  if ((hdrcount % 10) == 0)
    printf(&quot;%9s %9s %9s %9s %9s %9s\n&quot;,
           &quot;Device:&quot;, &quot;tps&quot;, &quot;blk_read/s&quot;, &quot;blk_wrtn/s&quot;, &quot;blk_read&quot;, &quot;blk_wrtn&quot;)
  hdrcount++

  foreach (dev in devices) {
    rdcount = @count(reads[dev])
    wrcount = @count(writes[dev])
    tps = (rdcount + wrcount) * 100 / $1
    rdblkcount = rdcount ? @sum(reads[dev]) / blksize : 0
    wrblkcount =wrcount ? @sum(writes[dev]) / blksize : 0
    rdblkrate = rdblkcount * 100 / $1
    wrblkrate = wrblkcount * 100 / $1
    printf(&quot;%9s %6d.%02d %6d.%02d %6d.%02d %9d %9d\n&quot;,
           dev, tps / 100, tps % 100,
           rdblkrate / 100, rdblkrate % 100,
           wrblkrate / 100, wrblkrate % 100,
           rdblkcount, wrblkcount)
  }
  printf(&quot;\n&quot;)
  delete devices
  delete reads
  delete writes
}
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