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Fri Mar 25 20:25:44 2005 Søren Sandmann <sandmann@redhat.com> * README: Require gtk+ 2.6 * treeviewutils.c (add_plain_text_column): Ellipsisize text columns.
58 lines
1.9 KiB
Plaintext
58 lines
1.9 KiB
Plaintext
Sysprof is a sampling profiler that uses a kernel module, sysprof-module.ko,
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to generate stacktraces which are then interpreted by the userspace
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program "sysprof".
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- There is no auto* stuff. Just type "make" and hope for the best
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- You need gtk+ 2.6.0 or better.
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- You need a 2.6 kernel. On SMP kernels the module produces unreliable data.
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- The module must be compiled with the same compiler that compiled the
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kernel it is going to be used with. For most systems that is just
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the system compiler, but if you have upgraded your kernel it is
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possible the one was compiled with a difference compiler.
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In that case, "insmod sysprof-module.ko" will produce this
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error message:
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insmod: error inserting './sysprof-module.o': -1 Invalid module format
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- The programs you want to profile should have debugging symbols, or
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you won't get much usable information. On a Fedora Core system,
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installing the relevant -debuginfo packages should do the trick.
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- To get usable data on the X server:
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(1) Compile the X server to use ".so" modules:
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- Uncomment the line "MakeDllModules Yes" in
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xc/config/cf/xorgsite.def
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- "make World"
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(2) Install the X server making sure it can't see any ".a" files. If
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you install on top of an existing installation, just do
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find /usr/X11R6/lib/"*.a" | sudo xargs rm
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and install the newly compiled X server.
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If a ".so" X server finds .a files in its module path it will
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try to load those in preference to .so files and this causes
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symbol resolution problems
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(3) Run your new X server
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(4) Run sysprof as root. This is necessary because the X server binary
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for security reasons is not readable by regular users. I could tell
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you why, but then I'd have to kill you.
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Credits:
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Kristian Høgsberg for the first port to the 2.6 kernel.
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Owen Taylor for the symbol lookup code in memprof
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Søren (sandmann@daimi.au.dk)
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