<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <!-- Copyright (C) 1988-2019 Free Software Foundation, Inc. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with the Invariant Sections being "Free Software" and "Free Software Needs Free Documentation", with the Front-Cover Texts being "A GNU Manual," and with the Back-Cover Texts as in (a) below. (a) The FSF's Back-Cover Text is: "You are free to copy and modify this GNU Manual. Buying copies from GNU Press supports the FSF in developing GNU and promoting software freedom." --> <!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ --> <head> <title>SPU (Debugging with GDB)</title> <meta name="description" content="SPU (Debugging with GDB)"> <meta name="keywords" content="SPU (Debugging with GDB)"> <meta name="resource-type" content="document"> <meta name="distribution" content="global"> <meta name="Generator" content="makeinfo"> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <link href="index.html#Top" rel="start" title="Top"> <link href="Concept-Index.html#Concept-Index" rel="index" title="Concept Index"> <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> <link href="Architectures.html#Architectures" rel="up" title="Architectures"> <link href="PowerPC.html#PowerPC" rel="next" title="PowerPC"> <link href="HPPA.html#HPPA" rel="prev" title="HPPA"> <style type="text/css"> <!-- a.summary-letter {text-decoration: none} blockquote.indentedblock {margin-right: 0em} blockquote.smallindentedblock {margin-right: 0em; font-size: smaller} blockquote.smallquotation {font-size: smaller} div.display {margin-left: 3.2em} div.example {margin-left: 3.2em} div.lisp {margin-left: 3.2em} div.smalldisplay {margin-left: 3.2em} div.smallexample {margin-left: 3.2em} div.smalllisp {margin-left: 3.2em} kbd {font-style: oblique} pre.display {font-family: inherit} pre.format {font-family: inherit} pre.menu-comment {font-family: serif} pre.menu-preformatted {font-family: serif} pre.smalldisplay {font-family: inherit; font-size: smaller} pre.smallexample {font-size: smaller} pre.smallformat {font-family: inherit; font-size: smaller} pre.smalllisp {font-size: smaller} span.nolinebreak {white-space: nowrap} span.roman {font-family: initial; font-weight: normal} span.sansserif {font-family: sans-serif; font-weight: normal} ul.no-bullet {list-style: none} --> </style> </head> <body lang="en"> <a name="SPU"></a> <div class="header"> <p> Next: <a href="PowerPC.html#PowerPC" accesskey="n" rel="next">PowerPC</a>, Previous: <a href="HPPA.html#HPPA" accesskey="p" rel="prev">HPPA</a>, Up: <a href="Architectures.html#Architectures" accesskey="u" rel="up">Architectures</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p> </div> <hr> <a name="Cell-Broadband-Engine-SPU-architecture"></a> <h4 class="subsection">21.4.6 Cell Broadband Engine SPU architecture</h4> <a name="index-Cell-Broadband-Engine"></a> <a name="index-SPU"></a> <p>When <small>GDB</small> is debugging the Cell Broadband Engine SPU architecture, it provides the following special commands: </p> <dl compact="compact"> <dt><code>info spu event</code></dt> <dd><a name="index-info-spu"></a> <p>Display SPU event facility status. Shows current event mask and pending event status. </p> </dd> <dt><code>info spu signal</code></dt> <dd><p>Display SPU signal notification facility status. Shows pending signal-control word and signal notification mode of both signal notification channels. </p> </dd> <dt><code>info spu mailbox</code></dt> <dd><p>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. </p> </dd> <dt><code>info spu dma</code></dt> <dd><p>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. </p> </dd> <dt><code>info spu proxydma</code></dt> <dd><p>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. </p> </dd> </dl> <p>When <small>GDB</small> is debugging a combined PowerPC/SPU application on the Cell Broadband Engine, it provides in addition the following special commands: </p> <dl compact="compact"> <dt><code>set spu stop-on-load <var>arg</var></code></dt> <dd><a name="index-set-spu"></a> <p>Set whether to stop for new SPE threads. When set to <code>on</code>, <small>GDB</small> will give control to the user when a new SPE thread enters its <code>main</code> function. The default is <code>off</code>. </p> </dd> <dt><code>show spu stop-on-load</code></dt> <dd><a name="index-show-spu"></a> <p>Show whether to stop for new SPE threads. </p> </dd> <dt><code>set spu auto-flush-cache <var>arg</var></code></dt> <dd><p>Set whether to automatically flush the software-managed cache. When set to <code>on</code>, <small>GDB</small> 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. </p> </dd> <dt><code>show spu auto-flush-cache</code></dt> <dd><p>Show whether to automatically flush the software-managed cache. </p> </dd> </dl> <hr> <div class="header"> <p> Next: <a href="PowerPC.html#PowerPC" accesskey="n" rel="next">PowerPC</a>, Previous: <a href="HPPA.html#HPPA" accesskey="p" rel="prev">HPPA</a>, Up: <a href="Architectures.html#Architectures" accesskey="u" rel="up">Architectures</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p> </div> </body> </html>