Comments on: Lazy Reading for 2011/12/04

By: Venkatesh Srinivas

Venkatesh Srinivas — Thu, 08 Dec 2011 19:15:11 +0000

Hi,

Wrt strlen — we should continue this discussion on list, rather than blog comments, but I have not been able to write an assembler version that is faster than the C version on both contemporary Intel and AMD CPUs, in particular the K8. I can outdo the C version pretty handily w/ the version posted in the comments on the original article, on Intel CPUs (Core2 and Nehalem, anyway), but that version is about the same speed as gcc’s take on the C version on K10 and is a ton slower on K8.

I’ve not tried the NetBSD versions linked there; they might be a good idea, but I’m not 100% sure that they’re okay per the C standard. They should do better though, since they work dword at a time-rather than byte-at-a-time (when possible).

By: Justin Sherrill

Justin Sherrill — Tue, 06 Dec 2011 21:53:44 +0000

As in, will a new version in assembly be added? Venkatesh is the one to ask.

By: str(len)

str(len) — Tue, 06 Dec 2011 15:56:51 +0000

Regarding the strlen()-story; is there any work going on or will the C code stay?

By: Justin Sherrill

Justin Sherrill — Tue, 06 Dec 2011 00:59:22 +0000

ggl: I agree, tea is always a good idea.

Dominique: http://leaf.dragonflybsd.org/cgi/web-man?command=ath&section=ANY – it looks like the answer is “… probably?” I only gave that page a cursory reading, but I know the wireless drivers in DragonFly were updated to match FreeBSD a little while ago, so it seems likely to work.

By: ggl

ggl — Mon, 05 Dec 2011 21:56:01 +0000

I buy tea, damnit. Unless you live in Australia, a cuppa tea is always a great gift during a cold month.

By: Dominique Geroux

Dominique Geroux — Sun, 04 Dec 2011 23:47:44 +0000

I personally find picking a present is one of the most complicated tasks to accomplish. It is not that you do not know the person good enough, it something different. There are two main scenarios: Firstly the blessed (<- might not be the right word here, but writing out "the person, which one will give a present to" is so long… maybe you have a suggestion) person wants something super ueber hyper expensive thing, or secondly he simply does not want anything.
My solution to this problem usually is: For the first case just get together with some other people and together you buy him that expensive thing, or in second case: If he does not want anything, do not buy him anything. It is as simple as that. I mean: What is the point of giving a present, when it will not be used / thrown away anyways? (Besides polluting the planet of course.)
If you really need to _have_ a present, something funny/random will do it, or something self made. Self made things can have a lot of emotional value.
So, I know I am not the best writer on this earth, but I still hope this helps.

PS: I know this is kinda off-topic, but do you know if the Atheros 9285 wlan card has proper drivers under DragonFly? The linux ath9k driver is crap, but the card works flawlessly under PC-BSD.