On Sun, Sep 29, 2013 at 1:59 AM, Stan Hoeppner <s...@hardwarefreak.com> wrote: > On 9/27/2013 6:03 AM, Joel Rees wrote: >> On Fri, Sep 27, 2013 at 10:22 AM, Tom H <tomh0...@gmail.com> wrote: >>> On Thu, Sep 26, 2013 at 7:09 AM, Stan Hoeppner <s...@hardwarefreak.com> >>> wrote: >>>> On 9/26/2013 5:45 AM, Joel Rees wrote: >>>>> On Thu, Sep 26, 2013 at 2:05 PM, Stan Hoeppner <s...@hardwarefreak.com> >>>>> wrote: >>>>>> On 9/25/2013 12:52 PM, Catherine Gramze wrote: >>>>> >>>>> Stan, joking aside, are there any AMD processors you would recommend >>>>> for doing kernel and driver level Android/ARM development in a VM? >>>>> >>>>> How likely would I be to find such a processor in a netbook or laptop? >>>> >>>> How likely is one to find a kernel developer doing any real work on a >>>> laptop? Throwing a netbook into the question is just silly. >> >> The reason I ask, Stan, is that I'm preparing to take a class where >> I'll be studying Super H assembly language programming, writing device >> drivers for an embedded SH3 running a Linux kernel, and such. > > I read everything below but my reply will be brief, so going up top with > it. Performance options with portables is always limited due to power. > A few quick points: > > 1. If you're going to be compiling anything, cache size trumps clock > speed. If a smaller cache roughly equivalent CPU clocks more than ~30% > higher than big_cache CPU it becomes a horse race. > > 2. Do not use an in-order CPU, such as the Atom, regardless of clock > speed. The lack of branch prediction, rename registers, etc, will > hamstring a compiler. > > 3. If you're running a hypervisor, low level support such as AMD-V or > Intel VT will help.
Okay, ... >> I'd like to prepare a portable emulation environment for the class, >> since I know I'll be wanting to do homework when the lab is not >> available. Renasas points to an SH4 emulator by Kawasaki-san that runs >> under QEMU, but at times I will likely be debugging the emulator as >> well as my own code. And I'll be doing a lot of compiles in the >> emulated system. >> >> I'll be biking to the class some days and walking other days, so I'd >> like a 12 inch screen form factor to fit in my bag and not break my >> back, which pretty much says netbook. Many netbooks have output for >> external monitors, which will help at home, at least. >> >> At this point, I've been kind of looking at Acer's Aspire (heh) V5-122 >> with an AMD A4-1250 and 4G RAM, or a similar V5 with an AMD A6-1450. >> I'm trying to figure out whether they support QEMU. If so, I'm >> thinking the 4-core A6 will be worth the extra 5000 yen, a pair of >> core for the host OS and I/O, and another core for the emulation >> environment makes three. >> >> I'm also looking at an HP dm1-4400, but the processor there is an AMD >> E2-1800, which seems to be last year's tech and a little heavier on >> battery use. It's only two cores, and only 2G RAM in the version at >> the store where I was looking at it (Sofmap in Umeda -- Osaka), but >> maybe HP is sturdier than Acer. I need to look at that. http://en.wikipedia.org/wiki/List_of_AMD_mobile_microprocessors tells me that AMD A4-1250, AMD A6-1450, and E2-1800 all have AMD-V. The E2-1800 has a half-Meg L2 cache, but higher speed CPU (1.7GHz). The A4-1250 has 1 Meg L2 cache but lower speed CPU (1.0 GHz). The A6-1450 has 2 Meg L2 cache to share between twice the CPUs. >>[...] So now my problem is scraping up 55,000 yen +/-. -- Joel Rees Be careful where you see conspiracy. Look first in your own heart. -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/caar43invbf8mexjrkeabjhcwnk6jsfo-sswp0ypreqsnwmw...@mail.gmail.com
