Re: Phoronix Benchmarks: Waht's wrong with FreeBSD 8.0?
On Nov 30, 2009, at 9:47 AM, O. Hartmann wrote: I'm just wondering what's wrong with FreeBSD 8.0/amd64 when I read the Benchmarks on Phoronix.org's website. Especially FreeBSD's threaded I/O shows in contrast to all claims that have been to be improoved the opposite. Corrected link: http://www.phoronix.com/scan.php?page=articleitem=freebsd8_benchmarksnum=1 And yeah, quite honestly: disk scheduling in FreeBSD appears to suck... The only reason I'm not switching from Linux. :( Regards, Thomas (PS. See my thread about horrible console latency during disk IO in the archives, very related. DS.)___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Phoronix Benchmarks: Waht's wrong with FreeBSD 8.0?
On Nov 30, 2009, at 12:38 PM, O. Hartmann wrote: Thomas Backman wrote: On Nov 30, 2009, at 9:47 AM, O. Hartmann wrote: I'm just wondering what's wrong with FreeBSD 8.0/amd64 when I read the Benchmarks on Phoronix.org's website. Especially FreeBSD's threaded I/O shows in contrast to all claims that have been to be improoved the opposite. Corrected link: http://www.phoronix.com/scan.php?page=articleitem=freebsd8_benchmarksnum=1 And yeah, quite honestly: disk scheduling in FreeBSD appears to suck... The only reason I'm not switching from Linux. :( Regards, Thomas (PS. See my thread about horrible console latency during disk IO in the archives, very related. DS.) Hello Thomas. I recall myself having had similar problems during heavy disk I/O (UFS and ZFS) with stuck console, stuck clients and especially stuck X11-clients. The discussion was really 'hot', but in the end no clear statement was made whether this is disk-i/o related or a deeper problem in the scheduler. Sorry for the lack of the link, I thought Phoronix is well known ... Oliver That's too bad, re: the scheduling. It seems to be a quite universal problem, yet I haven't seen much effort spent on working on the problem. :/ Re: phoronix, I commented mostly because the site is .com and not .org, so I came to a parked domain when I clicked your link. :) Also, I figured linking directly to the article will help the archives. Regards, Thomas___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Serial console trouble: loader and login works, but no kernel messages
On Aug 23, 2009, at 14:18, Thomas Backman wrote: First off: Not subscribed to this list, please make sure to Cc me if you don't reply directly. :) Anyway, I finally got my null modem cable, and plugged in in between a machine running 8.0-BETA2 and one running WinXP using Hyperterminal. My settings: /boot/loader.conf: boot_multicons=YES boot_serial=YES comconsole_speed=115200 console=comconsole,vidconsole /etc/ttys: # Serial terminals # The 'dialup' keyword identifies dialin lines to login, fingerd etc. ttyu0 /usr/libexec/getty std.115200 vt100 on secure /boot.config (which is read properly): -Dh -S115200 Anything wrong in the above? Hyperterminal is set to 115200 bps, 8 bits, no parity, 1 stop bit, and no flow control (if that's the correct translation to English). On the serial console, I go from the screen with the FreeBSD logo, with single-user options etc. (which works fine), and then nothing, until a login tty pops up (which also works fine). The main, if not only, reason I want a serial console is to be able to use it for single user mode, DDB, and so on. All kernel messages, and all rc messages are seen only on the graphics card; the serial console receives nothing but the / boot.config: -Dh ..., the logo screen, and then the login screen, during startup and *nothing* at all during shutdown. Also, I'm able to login and use the system both via the serial console and via the graphics card/keyboard... Is this supposed to be? I'm not complaining, I just got the impression it was one or the other. Any advice on how to get the kernel/rc messages etc. to the serial console (only or as well)? Regards, Thomas OK, so to rule out any installation-related problems, I booted from a bootonly install CD (a May ~5th snapshot of 8.0-CURRENT), with boot - h -S115200. Same thing: bootloader stuff on the serial console, kernel messages on the local computer only - and very slowly, at that, I'd say about one line a second. You could very easily see the characters being written to the screen. Am I the only one having these problems? It'd suck to buy a rather expensive (probably because they're pretty rare these days, plus I had to order from abroad) null modem cable and have it be completely useless. Regards, Thomas ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Serial console trouble: loader and login works, but no kernel messages
On Aug 26, 2009, at 18:04, Danny Braniss wrote: you need to set hint.uart.0.flags=0x10 danny I already tried that (in /boot/loader.conf); it shows up in dmesg (and didn't before), but still no luck. Regards/thanks, Thomas ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Serial console trouble: loader and login works, but no kernel messages
On Aug 26, 2009, at 18:16, Mike Tancsa wrote: Or, if you want to use loader.conf, try hw.uart.console=io:0x3f8 ---Mike That solved it! Thanks a lot!! :) Regards, Thomas ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Serial console trouble: loader and login works, but no kernel messages
On Aug 23, 2009, at 23:18, Carl Chave wrote: Did you try booting with the keyboard disconnected from the FreeBSD machine? Perhaps the vidconsole is favored when a keyboard is detected? On a linux box I had, I would get serial output from Grub, lose it during kernel load and then get a login once the OS was up, much like what you describe. I had to add a kernel argument to my Grub config so the kernel would output to the serial port. Did you look here: http://www.freebsd.org/doc/en/articles/console-server/freebsd.html I think 7.2 might be what you are missing but I can't check it myself. On Sun, Aug 23, 2009 at 3:13 PM, Thomas Backmanseren...@exscape.org wrote: On Aug 23, 2009, at 20:25, Tim Judd wrote: On 8/23/09, Thomas Backman seren...@exscape.org wrote: First off: Not subscribed to this list, please make sure to Cc me if you don't reply directly. :) Anyway, I finally got my null modem cable, and plugged in in between a machine running 8.0-BETA2 and one running WinXP using Hyperterminal. My settings: /boot/loader.conf: boot_multicons=YES boot_serial=YES comconsole_speed=115200 console=comconsole,vidconsole /etc/ttys: # Serial terminals # The 'dialup' keyword identifies dialin lines to login, fingerd etc. ttyu0 /usr/libexec/getty std.115200 vt100 on secure /boot.config (which is read properly): -Dh -S115200 Anything wrong in the above? Hyperterminal is set to 115200 bps, 8 bits, no parity, 1 stop bit, and no flow control (if that's the correct translation to English). On the serial console, I go from the screen with the FreeBSD logo, with single-user options etc. (which works fine), and then nothing, until a login tty pops up (which also works fine). The main, if not only, reason I want a serial console is to be able to use it for single user mode, DDB, and so on. All kernel messages, and all rc messages are seen only on the graphics card; the serial console receives nothing but the /boot.config: - Dh ..., the logo screen, and then the login screen, during startup and *nothing* at all during shutdown. Also, I'm able to login and use the system both via the serial console and via the graphics card/ keyboard... Is this supposed to be? I'm not complaining, I just got the impression it was one or the other. Any advice on how to get the kernel/rc messages etc. to the serial console (only or as well)? Regards, Thomas Do you use the VGA/vidconsole at all? A serial-only device (think soekris, ALIX/WRAP boards) that has no VGA will have different requirements than a serial-only device will. Your loader.conf statements are different than mine in the definition that you have more than I do to enable serial. My loader.conf just has one statement: console=comconsole - to feed ALL bootloaders, kernel probing, rc startup on the serial device. /etc/ttys defines the login lines. Though trial and error, I found when you use a dual-setup: comconsole,vidconsole, the first one (comconsole) will get rc output, and vidconsole won't. Of course, you're on 8.0 and I don't run BETAs. So the 8.0 BETA might still be having com port oddities, plus I noticed your ttys line is ttyu0, not ttyd0. Did 8.0 change the serial line device? To enable a serial-only device in my setups: /boot/loader.conf: console=comconsole /boot.config: -D /etc/ttys: # enable serial line, cons25 or vt100, depending if I'm originating from a bsd or windows box. Enabling dual-setups should be just the loader.conf change to dual console. HTH (Sorry for the lack of inline replies.) I do have a graphics card, and ideally I'd like to be able to use both, but serial has higher priority (with serial access, I can use minicom on another *nix box and essentially ssh into DDB, and stuff like that - right now I have to borrow a monitor, and write info down manually if needed, turning my head back and forth). I've tried lots of combinations of console=, including simply 'console=comconsole' and/or combinations of that and -D, -h- -Dh and -P in /boot.config. The extra lines in loader.conf are from the handbook, which says they're needed to use comconsole_speed. It seems they do the same thing as - D and -h, though. Oh, and re: /etc/ttys: Yup, it's ttyuX when using uart(4) which seems to be the default now. Actually, since my last buildworld half an hour ago I'm on 9.0-CURRENT. ;) Also, I made sure to set flags to 0x10 for the serial port as per the handbook (although I did it using loader.conf, not the kernel config); before the change, dmesg didn't mention any flags, but it now does. Didn't help squat, though. Though trial and error, I found when you use a dual-setup: comconsole,vidconsole, the first one (comconsole) will get rc output, and vidconsole won't. This doesn't mirror my experience; comconsole and comconsole,vidconsole appears to be just the same for me. I've never gotten anything except the boot loader and a login prompt over to the serial
Serial console trouble: loader and login works, but no kernel messages
First off: Not subscribed to this list, please make sure to Cc me if you don't reply directly. :) Anyway, I finally got my null modem cable, and plugged in in between a machine running 8.0-BETA2 and one running WinXP using Hyperterminal. My settings: /boot/loader.conf: boot_multicons=YES boot_serial=YES comconsole_speed=115200 console=comconsole,vidconsole /etc/ttys: # Serial terminals # The 'dialup' keyword identifies dialin lines to login, fingerd etc. ttyu0 /usr/libexec/getty std.115200 vt100 on secure /boot.config (which is read properly): -Dh -S115200 Anything wrong in the above? Hyperterminal is set to 115200 bps, 8 bits, no parity, 1 stop bit, and no flow control (if that's the correct translation to English). On the serial console, I go from the screen with the FreeBSD logo, with single-user options etc. (which works fine), and then nothing, until a login tty pops up (which also works fine). The main, if not only, reason I want a serial console is to be able to use it for single user mode, DDB, and so on. All kernel messages, and all rc messages are seen only on the graphics card; the serial console receives nothing but the /boot.config: - Dh ..., the logo screen, and then the login screen, during startup and *nothing* at all during shutdown. Also, I'm able to login and use the system both via the serial console and via the graphics card/ keyboard... Is this supposed to be? I'm not complaining, I just got the impression it was one or the other. Any advice on how to get the kernel/rc messages etc. to the serial console (only or as well)? Regards, Thomas ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Serial console trouble: loader and login works, but no kernel messages
On Aug 23, 2009, at 20:25, Tim Judd wrote: On 8/23/09, Thomas Backman seren...@exscape.org wrote: First off: Not subscribed to this list, please make sure to Cc me if you don't reply directly. :) Anyway, I finally got my null modem cable, and plugged in in between a machine running 8.0-BETA2 and one running WinXP using Hyperterminal. My settings: /boot/loader.conf: boot_multicons=YES boot_serial=YES comconsole_speed=115200 console=comconsole,vidconsole /etc/ttys: # Serial terminals # The 'dialup' keyword identifies dialin lines to login, fingerd etc. ttyu0 /usr/libexec/getty std.115200 vt100 on secure /boot.config (which is read properly): -Dh -S115200 Anything wrong in the above? Hyperterminal is set to 115200 bps, 8 bits, no parity, 1 stop bit, and no flow control (if that's the correct translation to English). On the serial console, I go from the screen with the FreeBSD logo, with single-user options etc. (which works fine), and then nothing, until a login tty pops up (which also works fine). The main, if not only, reason I want a serial console is to be able to use it for single user mode, DDB, and so on. All kernel messages, and all rc messages are seen only on the graphics card; the serial console receives nothing but the /boot.config: - Dh ..., the logo screen, and then the login screen, during startup and *nothing* at all during shutdown. Also, I'm able to login and use the system both via the serial console and via the graphics card/ keyboard... Is this supposed to be? I'm not complaining, I just got the impression it was one or the other. Any advice on how to get the kernel/rc messages etc. to the serial console (only or as well)? Regards, Thomas Do you use the VGA/vidconsole at all? A serial-only device (think soekris, ALIX/WRAP boards) that has no VGA will have different requirements than a serial-only device will. Your loader.conf statements are different than mine in the definition that you have more than I do to enable serial. My loader.conf just has one statement: console=comconsole - to feed ALL bootloaders, kernel probing, rc startup on the serial device. /etc/ttys defines the login lines. Though trial and error, I found when you use a dual-setup: comconsole,vidconsole, the first one (comconsole) will get rc output, and vidconsole won't. Of course, you're on 8.0 and I don't run BETAs. So the 8.0 BETA might still be having com port oddities, plus I noticed your ttys line is ttyu0, not ttyd0. Did 8.0 change the serial line device? To enable a serial-only device in my setups: /boot/loader.conf: console=comconsole /boot.config: -D /etc/ttys: # enable serial line, cons25 or vt100, depending if I'm originating from a bsd or windows box. Enabling dual-setups should be just the loader.conf change to dual console. HTH (Sorry for the lack of inline replies.) I do have a graphics card, and ideally I'd like to be able to use both, but serial has higher priority (with serial access, I can use minicom on another *nix box and essentially ssh into DDB, and stuff like that - right now I have to borrow a monitor, and write info down manually if needed, turning my head back and forth). I've tried lots of combinations of console=, including simply 'console=comconsole' and/or combinations of that and -D, -h- -Dh and -P in /boot.config. The extra lines in loader.conf are from the handbook, which says they're needed to use comconsole_speed. It seems they do the same thing as -D and -h, though. Oh, and re: /etc/ttys: Yup, it's ttyuX when using uart(4) which seems to be the default now. Actually, since my last buildworld half an hour ago I'm on 9.0-CURRENT. ;) Also, I made sure to set flags to 0x10 for the serial port as per the handbook (although I did it using loader.conf, not the kernel config); before the change, dmesg didn't mention any flags, but it now does. Didn't help squat, though. Though trial and error, I found when you use a dual-setup: comconsole,vidconsole, the first one (comconsole) will get rc output, and vidconsole won't. This doesn't mirror my experience; comconsole and comconsole,vidconsole appears to be just the same for me. I've never gotten anything except the boot loader and a login prompt over to the serial line - at least not at speed/settings that the client is set up to receive. I'm gonna try 9600 bps soon just to be sure it isn't that, but seeing how many others have mentioned using -S115200 I doubt it'll help. Thanks/regards, Thomas ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
