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| <h4 class="subsection">21.4.6 Cell Broadband Engine SPU architecture</h4> |
| |
| <p><a name="index-Cell-Broadband-Engine-1635"></a><a name="index-SPU-1636"></a> |
| When <span class="sc">gdb</span> is debugging the Cell Broadband Engine SPU architecture, |
| it provides the following special commands: |
| |
| <dl> |
| <dt><code>info spu event</code><dd><a name="index-info-spu-1637"></a>Display SPU event facility status. Shows current event mask |
| and pending event status. |
| |
| <br><dt><code>info spu signal</code><dd>Display SPU signal notification facility status. Shows pending |
| signal-control word and signal notification mode of both signal |
| notification channels. |
| |
| <br><dt><code>info spu mailbox</code><dd>Display SPU mailbox facility status. Shows all pending entries, |
| in order of processing, in each of the SPU Write Outbound, |
| SPU Write Outbound Interrupt, and SPU Read Inbound mailboxes. |
| |
| <br><dt><code>info spu dma</code><dd>Display MFC DMA status. Shows all pending commands in the MFC |
| DMA queue. For each entry, opcode, tag, class IDs, effective |
| and local store addresses and transfer size are shown. |
| |
| <br><dt><code>info spu proxydma</code><dd>Display MFC Proxy-DMA status. Shows all pending commands in the MFC |
| Proxy-DMA queue. For each entry, opcode, tag, class IDs, effective |
| and local store addresses and transfer size are shown. |
| |
| </dl> |
| |
| <p>When <span class="sc">gdb</span> is debugging a combined PowerPC/SPU application |
| on the Cell Broadband Engine, it provides in addition the following |
| special commands: |
| |
| <dl> |
| <dt><code>set spu stop-on-load </code><var>arg</var><dd><a name="index-set-spu-1638"></a>Set whether to stop for new SPE threads. When set to <code>on</code>, <span class="sc">gdb</span> |
| will give control to the user when a new SPE thread enters its <code>main</code> |
| function. The default is <code>off</code>. |
| |
| <br><dt><code>show spu stop-on-load</code><dd><a name="index-show-spu-1639"></a>Show whether to stop for new SPE threads. |
| |
| <br><dt><code>set spu auto-flush-cache </code><var>arg</var><dd>Set whether to automatically flush the software-managed cache. When set to |
| <code>on</code>, <span class="sc">gdb</span> will automatically cause the SPE software-managed |
| cache to be flushed whenever SPE execution stops. This provides a consistent |
| view of PowerPC memory that is accessed via the cache. If an application |
| does not use the software-managed cache, this option has no effect. |
| |
| <br><dt><code>show spu auto-flush-cache</code><dd>Show whether to automatically flush the software-managed cache. |
| |
| </dl> |
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