No AES-NI Support in OS X?

One of the features of Arrandale (and all other Westmere derived architectures) is support for AES-NI. The six instructions that fall under the AES-NI umbrella can accelerate encryption and decryption operations.

Microsoft's full disk encryption feature in Windows 7, BitLocker, is AES-NI accelerated. Simply upgrading to a supported Core i5 or i7 processor gives you better disk performance with BitLocker turned on.

While I'm still waiting for Apple to get back to me on a number of questions, I decided to see if FileVault, OS X's encryption system was AES-NI accelerated as well.

I ran XBench's disk tests on an encrypted home directory and then again on a completely unencrypted portion of the drive. If Apple takes advantage of the Core i5's AES-NI I should see a smaller drop in performance on the new MacBook Pro compared to the old one:

FileVault Disk Performance Comparison
  Sequential Read (256KB) Sequential Write (256KB) Random Read (4KB) Random Write (4KB)
Core 2 Duo MacBook Pro - FV Off 172.5 MB/s 127.1 MB/s 10.9 MB/s 134.1 MB/s
Core 2 Duo MacBook Pro - FV On 79.5 MB/s 61.9 MB/s 6.8 MB/s 67.8 MB/s
Core i5 MacBook Pro - FV Off 175.1 MB/s 160.0 MB/s 21.5 MB/s 112.7 MB/s
Core i5 MacBook Pro - FV On 80.5 MB/s 66.6 MB/s 13.2 MB/s 61.0 MB/s

And it looks like we have no AES-NI support in FileVault at least. It's not terribly surprising. Apple usually takes a while to implement new features enabled by hardware changes. Remember how long it took Apple to get GPU accelerated video decoding?

These numbers do tell us something else entirely though: the new MacBook Pro appears to offer better SATA performance.

Not too long ago I published a quick look at 6Gbps SATA controller performance and concluded, among other things, that Intel's SATA controllers are quite good. The numbers above support that theory as disk performance has gone up considerably compared to last year's NVIDIA based MacBook Pro. While random write speed dropped a bit, random read and sequential write performance jumped up significantly.

This is quite noticeable with a SSD but less of a problem with a hard drive. Needless to say Apple's return to Intel is a good thing, especially because we didn't have to give up NVIDIA's graphics.

They’re Actually Faster Apple's GPU Switching Technology
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  • Rod Hagen - Thursday, April 15, 2010 - link

    It is much, much easier on all of the unibody models than on the pre-unibody ones from before October 2008 (assuming this is what you had previous experience of) .

    Pretty much a five to ten minute job at worst in terms of the hardware side of things.

    Cheers

    Rod
    Reply
  • MadMan007 - Thursday, April 15, 2010 - link

    So I read this and I thought 'OK, Anand is impressed with the battery life' so I figured 'Hey why not see how it compares to other laptops?' I had to go to other articles because this review only has Macs - fair enough for the Mac fanbois who won't consider anything else anyway but not for those who might be open-minded. But what did I find? Sadly Windows laptops run an entirely set of battery test suites. 'Completely idle' 'Flash web browsing' (I think the Macs get a big boost by having non-Flash browsing and that seems like a big fudge to me) and then '720p video playback.'

    To my surprise, looking at results, the Macbook batery life is NOT super overwhelmingly impressive. Most of the other laptops that have high(er) battery life have CULV CPUs, fair enough they aren't as fast as the MacBook but then they will run any of the 'battery test' suites just as well. The recent Lenovo is however a Core i5 and gets good battery life.

    So Anand, please stop the shenanigans with Apple battery life hype and use tests that are actually the same (as much as possible -Safair might not be available on Windows for example) across platforms.
    Reply
  • Anand Lal Shimpi - Thursday, April 15, 2010 - link

    I addressed the Windows comparison in some earlier articles, the most recent of which is here:

    http://www.anandtech.com/show/2870/done-for-2009-t...

    You'll also note that Jarred runs an idle battery test in all of our Windows reviews, that's the most comparable to the light web browsing test. Some of the recent entries we've tested have gotten a lot better but take the Lenovo ThinkPad T410 for example:

    http://www.anandtech.com/show/2976/lenovo-thinkpad...

    With a 94Whr battery it delivers less battery life idle at the Windows desktop than this 77.5Whr 15-inch MBP while running our light web browsing test.

    The gap is closing but it's still there. The first link shows that the gap only really exists in light load scenarios where there's lots of idle time (e.g. reading, web browsing, writing).

    Take care,
    Anand
    Reply
  • maler23 - Thursday, April 15, 2010 - link

    @MadMan007

    Hey dude, show a little respect. I can understand wanting a little perspective but maybe rephrase your request...unless it's a rant, in which case, flame on, sir :)

    How about this:

    =============

    Anand, once you get all three models tested, could you include some comparison battery tests that include Flash as it that is a reality for most webpages(including the comment page I'm typing out right now). In addition, I would love to see a display comparison. I often see this site grumbling about contrast and color range and such with other laptops(recent Asus models, for example) but I would love to see Macbooks thrown into the bunch for comparison.

    =============

    cheers!

    -J
    Reply
  • Anand Lal Shimpi - Thursday, April 15, 2010 - link

    I should also add that I do have a video playback and flash web browsing test for the MBP, they simply didn't make the final cut for yesterday's review due to time constraints however I'll be adding in the data in the next day or so :)

    Take care,
    Anand
    Reply
  • sky7i - Thursday, April 15, 2010 - link

    Hmm, I was all set to get one but now I'm worried about heat and noise issues. I absolutely detest sweaty palms and am very sensitive to machine noise, often preferring my Acer netbook to the Mac as the Acer is silent.

    My current machine is an original Core Duo 15" MacBook Pro. It also has two fans (one a bit wobbly) but temperature wise it's fine. Will the new 15" be warmer?

    I was also contemplating the SSD 128gb option for an extra $280, for the silence and performance. Will this help it run cooler? Is there a better option in that price range? The Intel SSD seems wonderful but it's $500. Maybe I'll just try to find a single-platter 250gb drive instead.

    Thanks for any input.
    Reply
  • solarisking - Thursday, April 15, 2010 - link

    I have a late 2006 MBP and every since I had a warranty claim on the power brick (it stopped lighting orange/green/off correctly) they sent me a new one which was smaller. I think I figured out over time that it *seemed* like the new brick charged my MBP slower than the old one. Without the old brick I was unable to confirm. As it stands now, it can take up to 4 hours to charge the damn battery, if not longer. And I have two batteries! So hopefully, the new brick has more DC current and charges more quickly. Given a larger battery capacity that's my guess, and warmer laps are the result. And BTW, my MBP can get pretty dang hot when being recharged. Reply
  • laela - Thursday, April 15, 2010 - link

    How is the battery life under Windows 7? Thanks for a great review! Reply
  • mikeev - Thursday, April 15, 2010 - link

    I too would like to know this. I am extremely curious as to how bad the Windows 7 battery life is with that GPU cranking away the whole time, since I play a lot of games.

    Also, do you have any guess as to if NVIDIA or some 3rd party (a passionate user?) might possibly create a Windows driver/utility that will allow switching between the IGP and GPU like in OSX?
    Reply
  • jasperjones - Thursday, April 15, 2010 - link

    I think it's completely reasonable that Anand doesn't provide results for battery life under Win 7. iyam, if you don't use OS X as your primary OS, you shouldn't get a Mac. It's as simple as that. Reply

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