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11 KiB
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<title>New Page 1</title>
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<p align="center"><b><font size="5">PMELib 1.0</font></b></p>
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<h2>Introduction</h2>
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<p><font size="3"> This library is an interface to the Performance Monitoring
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Events (PME) that are available in the Pentium P5, P6 and P4 processors.
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There are 18 counters that let you gather information about what the processor is
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going during execution. They are described in these manuals:</font></p>
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<blockquote>
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<p><a href="http://developer.intel.com/design/pentium4/manuals/253665.htm"><font color="#008000" size="3">IA-32
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Intel Architecture Software Developer's Manual Volume 1: Basic Architecture</font></a></p>
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<p><a href="http://developer.intel.com/design/pentium4/manuals/253666.htm"><font color="#008000" size="3">IA-32
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Intel Architecture Software Developer's Manual Volume 2A: Instruction Set
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Reference, A-M</font></a></p>
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<p><a href="http://developer.intel.com/design/pentium4/manuals/253667.htm"><font color="#008000" size="3">IA-32
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Intel Architecture Software Developer's Manual Volume 2B: Instruction Set
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Reference, N-Z</font></a></p>
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<p><a href="http://developer.intel.com/design/pentium4/manuals/253668.htm"><font color="#008000" size="3">IA-32
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Intel Architecture Software Developer's Manual Volume 3: System Programming
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Guide</font></a></p>
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<p><font size="3"> <font color="#008000" size="3"> </font><font size="3" color="#000000">See
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chapter 15, Appendix A and Appendix B</font></font></p>
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</blockquote>
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<p><font size="3">Pentium 4 documentation is available <a href="http://developer.intel.com/design/Pentium4/documentation.htm">here</a></font></p>
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<p><font size="3">This library is an extension to the utilities from the Game Developer's
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Magazine <a href="http://www.gamasutra.com/features/wyatts_world/19990528/pentium3_08.htm">article</a>
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by Robert Wyatt in May 1998. The library is now in a class and included
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the Pentium 4 processor. Only Intel is currently supported and
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tested. </font></p>
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<p> </p>
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<p><font size="3">Send feedback to <a href="mailto:doug@nvidia.com">doug@nvidia.com</a></font></p>
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<p> </p>
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<p> </p>
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<h2><b>Installation</b></h2>
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<p><font size="3"> Window NT and Windows XP are supported and tested.
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Win98 may work, however.</font></p>
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<p><font size="3"> </font></p>
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<p><font size="3"> You need to install a driver, set some registry settings
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and reboot. If you installed the GDPerf.sys from the GD magazine article,
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you can skip the installation step. It uses the same driver. Let me know
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if you have problems.</font></p>
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<p><font size="3"> In the <i>Installation</i>
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directory</font></p>
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<p><font size="3"> copy
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GDPerf.sys to the window driver directory</font></p>
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<p><font size="3">
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copy GDPerf.sys <a href="file:///C:/windows/system32/drivers">C:\windows\system32\drivers</a></font></p>
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<p><font size="3">
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there is a batch file as an example</font></p>
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<p><font size="3"> Run the
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PMELib.reg file to set the registry settings</font></p>
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<p><font size="3"> Reboot</font></p>
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<p> </p>
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<h2><b>Configuring PMELib</b><font size="3"> </font></h2>
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<p><font size="3">For P5 and P6 processors (anything before Pentium 4), You use the same
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interfaces that are described in the Game Developer article. They have
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just been incorporated in to the PMELib as is.</font></p>
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<p><font size="3"><font color="#000000">In the Pentium 4, are 18 performance
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monitoring counters and more than 40 Events Modes that can be captured.
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Each Mode has a bit mask that indicates which tests to perform. These are
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described in Appendix A of </font><font color="#008000" size="3"><a href="http://developer.intel.com/design/pentium4/manuals/253668.htm">IA-32
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Intel Architecture Software Developer's Manual Volume 3: System Programming
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Guide</a> </font><font size="3" color="#000000"> Each of these event
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mode has a class dedicated to it. The event modes are listed below.</font></font></p>
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<blockquote>
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<p><font size="3">Set PerfTest2 for an example.</font></p>
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<p><font size="3"><b>Step 1) Choose an Event Mode class</b></font></p>
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<p><font size="3"> Example:</font></p>
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<p><font size="3">
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Event_branch_retired event;</font></p>
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<p> </p>
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<p><font size="3"><b>Step 2) Set the Event Mask for the selected Event
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Mode</b></font></p>
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<p><font size="3"> Example:</font></p>
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<p><font size="3"> event.eventMask->MMNP = 1;</font></p>
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<p><font size="3"> event.eventMask->MMTP = 1;</font></p>
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<p> </p>
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<p><b><font size="3">Step 3) Set the privilege level to capture data
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from with the <i>SetCaptureMode</i> method</font></b></p>
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<blockquote>
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<p><font size="3">OS_Only, <font COLOR="#008000">// ring 0, driver
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level only
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</font></font></p>
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<p><font size="3">USR_Only, <font COLOR="#008000">// app level, privilege
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levels 1 2 and 3
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</font></font></p>
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<p><font size="3">OS_and_USR, <font COLOR="#008000">// all levels 0, 1, 2
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and 3
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</font>
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</font></p>
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</blockquote>
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<p><font size="3"> Optionally, you
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can enable tagging in the <i>SetCaptureMode</i> method.</font></p>
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<p><font size="3"> Example:</font></p>
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<p><font size="3"><font COLOR="#0000ff">
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</font>SetCaptureMode(OS_and_USR, TagEnable, 34);</font></p>
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<p> </p>
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<p><font size="3"><b>Step 4) Optional Configuration</b></font></p>
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<p><font size="3"> <b> </b>At this
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point you can configure Tagging, Filtering, Overflow and Cascading
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options. You can also select one of the legal counters for the selected
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Event Mode.</font></p>
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<p><font size="3"><b>Step 5) Set the process priority to high</b></font></p>
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<blockquote>
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<p><font size="3">This reduces the noise from other processes interfering. If you
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have an infinite loop in you code and you have these set, you may hang and
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need to reboot</font></p>
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<p><font size="3">Example:</font></p>
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<p><font size="3"> PME * pme = PME::Instance();</font></p>
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<p><font size="3"> pme->SetProcessPriority(ProcessPriorityHigh);</font></p>
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<font SIZE="2">
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<p> </p>
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</blockquote>
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</font>
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<p><font size="3"><b>Step 6) Start using the counters</b></font></p>
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<p><font size="3"> Each Event Mode
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counter has the follow ability:</font></p>
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<blockquote>
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<p><font size="3"> Stop</font></p>
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<p><font size="3"> Start</font></p>
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<p><font size="3"> Clear - set to
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0</font></p>
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<p><font size="3"> Read</font></p>
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<p><font size="3"> Write - write a
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64 bit counter value</font></p>
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</blockquote>
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<p><font size="3"> </font></p>
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<p><font size="3"><b>Step 7) Set the process priority to normal</b></font></p>
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<p><font size="3"> pme->SetProcessPriority(ProcessPriorityNormal);</font></p>
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<h2> </h2>
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</blockquote>
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<h2><font size="3"><b>Event Modes:</b></font></h2>
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<blockquote>
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<blockquote>
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<p><font size="3">Event_TC_deliver_mode</font></p>
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<p><font size="3">Event_BPU_fetch_request</font></p>
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<p><font size="3">Event_ITLB_reference</font></p>
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<p><font size="3">Event_memory_cancel</font></p>
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<p><font size="3">Event_memory_complete</font></p>
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<p><font size="3">Event_load_port_replay</font></p>
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<p><font size="3">Event_store_port_replay</font></p>
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<p><font size="3">Event_MOB_load_replay</font></p>
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<p><font size="3">Event_page_walk_type</font></p>
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<p><font size="3">Event_BSQ_cache_reference</font></p>
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<p><font size="3">Event_IOQ_allocation</font></p>
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<p><font size="3">Event_IOQ_active_entries</font></p>
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<p><font size="3">Event_FSB_data_activity</font></p>
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<p><font size="3">Event_BSQ_allocation</font></p>
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<p><font size="3">Event_BSQ_active_entries</font></p>
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<p><font size="3">Event_SSE_input_assist</font></p>
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<p><font size="3">Event_packed_SP_uop</font></p>
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<p><font size="3">Event_packed_DP_uop</font></p>
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<p><font size="3">Event_scalar_SP_uop</font></p>
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<p><font size="3">Event_scalar_DP_uop</font></p>
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<p><font size="3">Event_64bit_MMX_uop</font></p>
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<p><font size="3">Event_128bit_MMX_uop</font></p>
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<p><font size="3">Event_x87_FP_uop</font></p>
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<p><font size="3">Event_x87_SIMD_moves_uop</font></p>
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<p><font size="3">Event_TC_misc</font></p>
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<p><font size="3">Event_global_power_events</font></p>
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<p><font size="3">Event_tc_ms_xfer</font></p>
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<p><font size="3">Event_uop_queue_writes</font></p>
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<p><font size="3">Event_retired_mispred_branch_type</font></p>
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<p><font size="3">Event_retired_branch_type</font></p>
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<p><font size="3">Event_resource_stall</font></p>
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<p><font size="3">Event_WC_Buffer</font></p>
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<p><font size="3">Event_b2b_cycles</font></p>
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<p><font size="3">Event_bnr</font></p>
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<p><font size="3">Event_snoop</font></p>
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<p><font size="3">Event_response</font></p>
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<p><font size="3">Event_front_end_event</font></p>
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<p><font size="3">Event_execution_event</font></p>
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<p><font size="3">Event_replay_event</font></p>
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<p><font size="3">Event_instr_retired</font></p>
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<p><font size="3">Event_uops_retired</font></p>
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<p><font size="3">Event_uop_type</font></p>
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<p><font size="3">Event_branch_retired</font></p>
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<p><font size="3">Event_mispred_branch_retired</font></p>
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<p><font size="3">Event_x87_assist</font></p>
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<p><font size="3">Event_machine_clear</font></p>
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</blockquote>
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</blockquote>
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<h2><b>Credits</b></h2>
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<p><a href="http://www.gamasutra.com/features/wyatts_world/19990528/pentium3_08.htm"><font color="#008000" size="3">http://www.gamasutra.com/features/wyatts_world/19990528/pentium3_08.htm</font></a></p>
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<p><font color="#008000" size="3">Used some tables from <a href="http://user.it.uu.se/~mikpe/">Mikael Pettersson's</a>
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<a href="http://user.it.uu.se/~mikpe/linux/perfctr/">pertctf</a>
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</font>
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</p>
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<p align="left"><font color="#008000" size="3">Used the detect code from<a href="http://yotov.org">
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Kamen Yotov's</a> <a href="http://iss.cs.cornell.edu/ia32.htm">ia32lib library</a></font></p>
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<p> </p>
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<p> </p>
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