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Re: [Qemu-devel] [PATCH v6 01/22] instrument: Add documentation
From: |
Emilio G. Cota |
Subject: |
Re: [Qemu-devel] [PATCH v6 01/22] instrument: Add documentation |
Date: |
Mon, 25 Sep 2017 15:42:02 -0400 |
User-agent: |
Mutt/1.5.24 (2015-08-30) |
On Mon, Sep 25, 2017 at 21:03:39 +0300, Lluís Vilanova wrote:
> I know it's not exactly the same we're discussing, but the plot in [1]
> compares
> a few different ways to trace memory accesses on SPEC benchmarks:
>
> * First bar is using a Intel's tool called PIN [2].
> * Second is calling into an instrumentation function on every executed memory
> access in QEMU.
> * Third is embedding the hot path of writing the memory access info to an
> array
> into the TCG opcode stream (more or less equivalent to supporting filtering;
> when the array is full, a user's callback is called - cold path -)
> * Fourth bar can be ignored.
>
> This was working on a much older version of instrumentation for QEMU, but I
> can
> implement something that does the first use-case point above and some
> filtering
> example (second use-case point) to see what's the performance difference.
>
> [1] https://filetea.me/n3wy9WwyCCZR72E9OWXHArHDw
Interesting! Unfortunately, this URL gives me a 404.
E.
- [Qemu-devel] [PATCH v6 00/22] instrument: Add basic event instrumentation, Lluís Vilanova, 2017/09/13
- [Qemu-devel] [PATCH v6 01/22] instrument: Add documentation, Lluís Vilanova, 2017/09/13
- Re: [Qemu-devel] [PATCH v6 01/22] instrument: Add documentation, Peter Maydell, 2017/09/14
- Re: [Qemu-devel] [PATCH v6 01/22] instrument: Add documentation, Lluís Vilanova, 2017/09/15
- Re: [Qemu-devel] [PATCH v6 01/22] instrument: Add documentation, Peter Maydell, 2017/09/18
- Re: [Qemu-devel] [PATCH v6 01/22] instrument: Add documentation, Lluís Vilanova, 2017/09/18
- Re: [Qemu-devel] [PATCH v6 01/22] instrument: Add documentation, Peter Maydell, 2017/09/18
- Re: [Qemu-devel] [PATCH v6 01/22] instrument: Add documentation, Emilio G. Cota, 2017/09/19
- Re: [Qemu-devel] [PATCH v6 01/22] instrument: Add documentation, Lluís Vilanova, 2017/09/25
- Re: [Qemu-devel] [PATCH v6 01/22] instrument: Add documentation,
Emilio G. Cota <=
- Re: [Qemu-devel] [PATCH v6 01/22] instrument: Add documentation, Lluís Vilanova, 2017/09/26
- Re: [Qemu-devel] [PATCH v6 01/22] instrument: Add documentation, Lluís Vilanova, 2017/09/29
- Re: [Qemu-devel] [PATCH v6 01/22] instrument: Add documentation, Emilio G. Cota, 2017/09/29
- Re: [Qemu-devel] [PATCH v6 01/22] instrument: Add documentation, Lluís Vilanova, 2017/09/29
- Re: [Qemu-devel] [PATCH v6 01/22] instrument: Add documentation, Emilio G. Cota, 2017/09/30
- Re: [Qemu-devel] [PATCH v6 01/22] instrument: Add documentation, Peter Maydell, 2017/09/19
Re: [Qemu-devel] [PATCH v6 01/22] instrument: Add documentation, Stefan Hajnoczi, 2017/09/18
Re: [Qemu-devel] [PATCH v6 01/22] instrument: Add documentation, Stefan Hajnoczi, 2017/09/18
[Qemu-devel] [PATCH v6 02/22] instrument: Add configure-time flag, Lluís Vilanova, 2017/09/13
[Qemu-devel] [PATCH v6 03/22] instrument: Add generic library loader, Lluís Vilanova, 2017/09/13