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− | This page describes accounting for I/O activity of | + | This page describes how accounting is done for I/O activity of VE processes. This feature is available beginning with OpenVZ kernels version <code>028test008</code>. |
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== New resources == | == New resources == | ||
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== Proc interface == | == Proc interface == | ||
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=== General information === | === General information === | ||
− | As was described in [[BC proc entries|another article]] each beancounter has | + | As it was described in [[BC proc entries|another article]] each beancounter has it's own <code>/proc/bc/$BCID</code> directory where subsystems add their entries. I/O accounting adds <code>ioacct</code> entry to show I/O information. This entry contains the following information: |
<pre> | <pre> | ||
# cat /proc/bc/101/ioacct | # cat /proc/bc/101/ioacct | ||
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</pre> | </pre> | ||
− | Note that <code>dirty</code> is not the size of dirty data at the moment, but the size of dirty data seen so far. | + | Note that <code>dirty</code> is not the size of a dirty data at the moment, but the size of a dirty data seen so far. |
=== Debugging information === | === Debugging information === | ||
− | When <code>CONFIG_UBC_DEBUG_IO</code>, is on <code>/proc/bc/ioacct_debug</code> is added. This entry contains a snapshot of current dirty pages with its beancounter. For example: | + | When <code>CONFIG_UBC_DEBUG_IO</code>, is on <code>/proc/bc/ioacct_debug</code> is added. This entry contains a snapshot of current dirty pages with its beancounter in system. For example: |
<pre> | <pre> | ||
# cat /proc/bc/ioacct_debug | # cat /proc/bc/ioacct_debug | ||
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io_pbs 0 | io_pbs 0 | ||
</pre> | </pre> | ||
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[[Category:Resource management]] | [[Category:Resource management]] |