gmane.os.netbsd.general

Re: gcc, march and sse

Johnny Billquist — 2008-12-03T15:54:41

Isn't that obvious? Tune for optimal performance on that variant. But you cannot use instructions that aren't allowed by march, because then it won't run on march (if so, what was the point of march?). But different instruction sequences can be the optimal on different implementations of an instruction set. Johnny

build.sh on Linux?

Glen Johnson — 2008-12-03T17:41:08

Netbsd-users, I am trying to compile NetBSD on Fedora 9. When I execute "./build.sh -a i386 -m i386 -U tools" it fails to build the tool set with: # compile compat/glob.lo cc -O -I. -I./include -I/home/glen/src/c/netbsd/usr/src/tools/compat -I/home/glen/src/c/netbsd/usr/src/tools/compat/sys -DHAVE_NBTOOL_CONFIG_H=1 -D_FILE_OFFSET_BITS=64 -D__DBINTERFACE_PRIVATE -c -o glob.lo.o /home/glen/src/c/netbsd/usr/src/tools/compat/../../lib/libc/gen/glob.c /home/glen/src/c/netbsd/usr/src/tools/compat/../../lib/libc/gen/glob.c: In function 'globextend': /home/glen/src/c/netbsd/usr/src/tools/compat/../../lib/libc/gen/glob.c:804: error: 'ARG_MAX' undeclared (first use in this function) /home/glen/src/c/netbsd/usr/src/tools/compat/../../lib/libc/gen/glob.c:804: error: (Each undeclared identifier is reported only once /home/glen/src/c/netbsd/usr/src/tools/compat/../../lib/libc/gen/glob.c:804: error: for each function it appears in.) *** Failed target: glob.lo *** Failed command: cc -O -I. -I./include -I/home/glen/src/c/netbsd/usr/src/tools/compat -I/home/glen/src/c/netbsd/usr/src/tools/compat/sys -DHAVE_NBTOOL_CONFIG_H=1 -D_FILE_OFFSET_BITS=64 -D__DBINTERFACE_PRIVATE -c -o glob.lo.o /home/glen/src/c/netbsd/usr/src/tools/compat/../../lib/libc/gen/glob.c *** Error code 1 Stop. nbmake: stopped in /home/glen/src/c/netbsd/usr/src/tools/compat Any suggestions? Thanks, Glen

Re: gcc, march and sse

Johnny Billquist — 2008-12-03T16:51:56

By using pentiumpro special features, you are not compatible with the 486 CPU. That should be obvious from just saying it out loud. Johnny

Re: gcc, march and sse

Ignatios Souvatzis — 2008-12-03T16:42:29

-march chooses the instruction set used. -mtune chooses, under that restriction, the selection and ordering of instructions used for your program. E.g., if you have lots of 686 but few 486, you'd use that so that your program, while running on the 486, will still be a bit better on the 686 than without. Regards, -is

Re: gcc, march and sse

Quentin Garnier — 2008-12-03T15:57:24

No. It produces binaries using the instruction set from the i486 with a scheduling optimised for the i686. The way CPUs work, the order in which you feed it the instructions matters a lot. They won't. When you use -march, gcc will produce code that can run on that architecture. Those applications use assembly (either external or inline) to achieve that. It's not gcc's choice.

Re: gcc, march and sse

Joel Carnat — 2008-12-03T15:50:57

Le Mer 3 décembre 2008 16:40, Dennis den Brok a écrit : hum... then what would be the point in setting "mtune" ?

Re: gcc, march and sse

Dennis den Brok — 2008-12-03T15:40:41

Joel Carnat carnat.net> schrieb: -march specifies the instruction set the compiler may use; thus, neither MMX nor SSE will be used. There may be exceptions, however, because some pkgsrc applications, notably mplayer, choose which instruction set to use at runtime, so in that case, you wouldn't have to worry about losing a few CPU cycles. HTH, Dennis den Brok

gcc, march and sse

Joel Carnat — 2008-12-03T15:26:11

Hello, I read that Slackware Linux compiles most of its packages with "-march=i486 -mtune=i686". As far as I understood gcc's manpage, this means "keep code compatible with 486 CPU but allow the use pentiumpro special features", right ? Still from the man page, MMX is supported since "pentium2 (or pentium-mmx only)", SSE since "pentium3", SSE2 since "pentium-m", SSE3 since "prescott". I tweaked my mk.conf to compile pkgsrc (on a domU) using "-O2 -march=486 -mtune=686" but I'm now wondering if any on those compiled programs will use MMX or SSE when running on my laptop or intel-based servers (intel core2duo). Then second question, in case the previous thought is correct, if I use "-march=i486 -mtune=nocona", is there a way to see which instruction the program uses ? For example, if I compile xorg/firefox/mplayer and then run it in a special manner, can I see that the core2duo uses MMX/SSE* instruction while the C3 only use MMX instruction (from the same binary) ? TIA, Jo

Re: how to create a disk image? (shark; disklabel + / + swap)

Alexander Shishkin — 2008-12-03T08:51:45

I'm not sure if this is at all relevant, but have you had a look at the script [1] that I had to create a rootfs for debugging NetBSD in qemu. It won't be applicable for you right away, but might be useful still. [1]: http://koowaldah.org/people/ash/netbsd/mkdisk.sh Regards, -- Alex

Re: how to create a disk image? (shark; disklabel + / + swap)

Martin Husemann — 2008-12-02T18:34:12

Too bad - I would have suggested to compile sysinst with -DDEBUG and just use that against a vnd otherwise. Martin

Re: how to create a disk image? (shark; disklabel + / + swap)

Hubert Feyrer — 2008-12-02T17:21:51

Let me add that I'd prefer to avoid vnd(4) for two reasons: 1) it requires the host to run NetBSD (or anything that has vnd) 2) it requires root privileges - Hubert

Re: wi and WPA-PSK

Vlad Markov — 2008-12-02T00:30:17

I went and looked at the code, there is no support for WPA in the wi driver in NetBSD 4.0.1. I found this: http://perforce.freebsd.org/depotTreeBrowser.cgi?FSPC=//depot/projects/vap/sys/dev/wi Too bad I don't have FreeBSD to try out their driver with my card.

Re: Mozilla Sunbird and TCL-Plugin 3.0

Steven M. Bellovin — 2008-12-01T01:47:56

On Mon, 24 Nov 2008 16:10:58 +0100 (CET) Volker Wolfram volker-wolfram.de> wrote: There is a test version of Sunbird 0.9. However, when I installed it I lost data. I haven't had time to check into what happened. I know nothing of any plug-ins for it. --Steve Bellovin, http://www.cs.columbia.edu/~smb

Re: wi and WPA-PSK

Francisco Valladolid — 2008-11-29T18:45:12

I think the current wi driver in NetBSD dont support WPA ..

Re: wi and WPA-PSK

Vlad Markov — 2008-11-29T18:39:29

It didn't support WPA until I flashed it. After flashing it, the card has been doing WPA-PSK in Windows for a few months now.

Re: wi and WPA-PSK

Steven M. Bellovin — 2008-11-29T18:16:48

On Sat, 29 Nov 2008 12:27:56 -0500 "Francisco Valladolid" gmail.com> wrote: Does NetBSD give any way to tell the capabilities of a given device? --Steve Bellovin, http://www.cs.columbia.edu/~smb

Re: wi and WPA-PSK

Francisco Valladolid — 2008-11-29T17:27:56

I think the prism chip in this card don-t support WPA, only WEP ª please check the spec info for your card. http://kbserver.netgear.com/datasheets/ma401-Aug2003.pdf Regards

Re: wi and WPA-PSK

Steven M. Bellovin — 2008-11-29T04:26:05

On Sat, 29 Nov 2008 04:19:21 +0000 (UTC) christos< at >astron.com (Christos Zoulas) wrote: You may want to look at http://www.cs.columbia.edu/~smb/blog/2008-11/2008-11-28.html for my observations on the subject... --Steve Bellovin, http://www.cs.columbia.edu/~smb

Re: wi and WPA-PSK

Christos Zoulas — 2008-11-29T04:19:21

In article <20081129041506.GA19141< at >SDF.LONESTAR.ORG>, Vlad Markov sdf.lonestar.org> wrote: For WPA you need to configure and run wpa_supplicant. christos

wi and WPA-PSK

Vlad Markov — 2008-11-29T04:15:06

I flashed a Netgear MA401 Wireless NIC so that I cold use it via my WPA-PSK wireless router on a Windows box. It has been working there nicely for a few months now. I want to use it on my NetBSD box also. From dmesg: wi0 at pcmcia0 function 0: wi0: 802.11 address 00:09:5b:23:3c:0e wi0: using RF:PRISM2.5 MAC:ISL3873B(PCMCIA) wi0: Intersil Firmware: Primary (1.1.1), Station (1.7.4) wi0: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps That looks good to me. from ifconfig: wi0: flags=8863 mtu 1500 ssid utopia nwkey ***** powersave off bssid 00:1e:e5:6f:ad:4d chan 1 address: 00:09:5b:23:3c:0e media: IEEE802.11 autoselect (DS2) status: active inet 0.0.0.0 netmask 0xff000000 broadcast 255.255.255.255 inet6 fe80::209:5bff:fe23:3c0e%wi0 prefixlen 64 scopeid 0x3 Doesn't "nwkey" mean its trying to use WEP? It looks like WPA is not supported by the NetBSD wi driver. Am I correct? If I am correct, is there any chance WPA will be implemented for wi in NetBSD 5.0? Vlad

netbsd 5 & lii0

jimerickso — 2008-11-29T00:54:33

is there an irq conflict when using the lii0 interface on the eee 900 16g in netbsd 5.0? ifconfig shows the interface as being up but with the media showing "none" and the status showing "no carrier". networking is configured properly using dhcp. i can not initialize the interface. shouldn't it at least show a carrier? the cabling, interface, and router are all functional when using freebsd, openbsd and netbsd 4.0.1 on this eee 900 16g. thank you for any help you can offer.