Messages in this thread | | | Date | Sat, 9 Jul 2005 00:12:14 +0200 | From | Andi Kleen <> | Subject | Re: Instruction Tracing for Linux |
| |
On Fri, Jul 08, 2005 at 03:49:47PM -0500, Adnan Khaleel wrote: > Thanks for your suggestions. I have been working with Simics, SimNow and Bochs. I've had mixed luck with all of them. Although Simics should be the most promising, I've really had > an uphill struggle with it especially when it comes to x86-64. I've been playing around with Bochs and most likely will end up using that but it has its drawbacks as well.
I haven't tested any recent versions, but the original development was near mostly done with Simics and it did work well for me.
iirc there was a recent bug that the optimized memcpy or memset in the glibc didn't like a CPU returning 0 bytes of cache size and Simics did that. You might have run into that. It should be fixed now.
Bochs used to be quite buggy on the x86-64 department and didn't do multi processor, but that also might have changed. It is significantly slower than the others.
> > Even if I can't trace the kernel, is there anything available for just the user space stuff?
The AMD CodeAnalyst for Linux has a simulator that first collects a trace and then runs that in a CPU model. I assume it does first single stepping. It's unfortunately binary only.
If slow single stepping is enough it's reasonably easy to write something yourself too. I have old example source that implements single stepping.
However I doubt any of them are capable of running the bigger benchmarks.
-Andi - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |