Re: FreeBSD beginner (NetBSD advanced)
I have used a single 256MB mfs on FreeBSD for months without any problem. I was not doing heavy IO on it, it was used in a /tmp fashion and most of the time was swapped out, going down to 8MB resident size at times. softdeps in NetBSD is very buggy. putting very high load like deleting huge tree or unpacking it easily triggers DDB with ffs_something panic :( I have the feeling that NetBSD without softdeps performs much better than FreeBSD. I can live without them on NetBSD. I think you will miss ALTQ. There is a patch for FreeBSD-4.8 at Kenjiro's page. NikV On Friday 16 July 2004 00:50, Wojciech Puchar wrote: Wojciech Puchar wrote: i installed FreeBSD once to do quick performance tests, and at least in disk I/O and fair scheduling it's MUCH better (tested 4.10 and 5.1). It's nice to be welcomed by higher performance when you switch OSes. :-) while high performance is always cool, stable performance is even more important under load. I mean if i do 5 things it shouldn't slow down 100 times. in NetBSD especially if you start large file copying whole system slows down terribly. not true with FreeBSD. softdeps in NetBSD is very buggy. putting very high load like deleting huge tree or unpacking it easily triggers DDB with ffs_something panic :( my questions: 1) what is Buf and Cache in top exactly? why buf on 96MB machine gets to near 20MB and never goes down? it's almost 1/4 of memory size. Cache: number of pages used for VM-level disk caching Buf: number of pages used for BIO-level disk caching can you explain more? (or redirect me to URL about it) is all things double-buffered?!! it would be lots of memory traffic. BTW is mfs usable and stable in FreeBSD? and does it make real sense? in NetBSD mfs is terribly unstable. especially large mfs disks easily crash things. 2) can i compile kernel with -march=pentium,pentium[234] -O2 optimization? in NetBSD 2.0 doing -march=pentium produces kernel that doesn't boot at all, just resets. If you want to tune your system, tweaking the options from GENERIC by removing at least: cpu I386_CPU cpu I486_CPU did this. ...will probably result in the greatest improvement, along with disabling WITNESS and such if using -CURRENT. See man tuning. oh - i never did it... Using -march=pentium is likely to be worthwhile (assuming you don't have a with heavy CPU-bound userland binaries i measured 10-25% gain. 386 :-), higher than that may run into problems. Higher optimizations than -O are not supported, although work is underway to fix the remaining code issues (mainly in libalias used by NAT), as I understand. If you want to try -O2, give it a shot, but you might consider using either -Os rather than -O2, or try -O2 -fno-strict-aliasing. why -Os? it makes slower but smaller code? will lower memory traffic/better cache hitting give more gain than it's lost because of slower code. 3) how can i disable compiling, using etc.. all that LKM (KLD) stuff? i really prefer one static kernel. Read the handbook on building the kernel. what i missed? i already built a kernel, found how to disable modules but all kld stuff is still compiled in! yes i can just do rm *.ko but removing kld from kernel would be even nicer. 4) is IPv6 working well? (i mean no crashes etc...) i will get real IPv6 zone allocation soon and want to use it. IPv6 seems to work well, yes. 5) what is used in FreeBSD for traffic management. NetBSD has altq - please just give me a name i will RTFM. If you want to use that, ipf/altq should be available in -CURRENT. Otherwise, ipfw dummynet is another choice. 6) how to turn using serial port as console on i386? my home machine is headless, i'm using X terminals to access it. See the handbook. 7) does FreeBSD support 2 CPUs on i386? Sure. See the SMP section of the kernel config file. should i go to 4.10 or better 5.2.1? stability is really important to me. 4.10, unless there's a feature from -CURRENT that you don't want to live without. i don't think it is unless 4.10 has: 1) multiCPU 2) traffic shaping 3) nat 4) firewalling 5) IPv6 6) tun device i don't think i need anything more ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: FreeBSD beginner (NetBSD advanced)
I have used a single 256MB mfs on FreeBSD for months without any problem. I was not doing heavy IO on it, it was used in a /tmp fashion and most of the time was swapped out, going down to 8MB resident size at times. does FreeBSD deallocate pages that are unused. NetBSD does not. if you create 100MB file on mfs and delete it, VM size of mfs is still over 100MB. while it will get swapped out it's a kind of nonsense IMHO softdeps in NetBSD is very buggy. putting very high load like deleting huge tree or unpacking it easily triggers DDB with ffs_something panic :( I have the feeling that NetBSD without softdeps performs much better than FreeBSD. I can live without them on NetBSD. i have too. anyway softdeps is big speedup. i tried async and doing sync every 5 seconds. looks good. I think you will miss ALTQ. There is a patch for FreeBSD-4.8 at Kenjiro's page. i read manual page about ipfw yesterday. i think i will not miss :) NikV On Friday 16 July 2004 00:50, Wojciech Puchar wrote: Wojciech Puchar wrote: i installed FreeBSD once to do quick performance tests, and at least in disk I/O and fair scheduling it's MUCH better (tested 4.10 and 5.1). It's nice to be welcomed by higher performance when you switch OSes. :-) while high performance is always cool, stable performance is even more important under load. I mean if i do 5 things it shouldn't slow down 100 times. in NetBSD especially if you start large file copying whole system slows down terribly. not true with FreeBSD. softdeps in NetBSD is very buggy. putting very high load like deleting huge tree or unpacking it easily triggers DDB with ffs_something panic :( my questions: 1) what is Buf and Cache in top exactly? why buf on 96MB machine gets to near 20MB and never goes down? it's almost 1/4 of memory size. Cache: number of pages used for VM-level disk caching Buf: number of pages used for BIO-level disk caching can you explain more? (or redirect me to URL about it) is all things double-buffered?!! it would be lots of memory traffic. BTW is mfs usable and stable in FreeBSD? and does it make real sense? in NetBSD mfs is terribly unstable. especially large mfs disks easily crash things. 2) can i compile kernel with -march=pentium,pentium[234] -O2 optimization? in NetBSD 2.0 doing -march=pentium produces kernel that doesn't boot at all, just resets. If you want to tune your system, tweaking the options from GENERIC by removing at least: cpu I386_CPU cpu I486_CPU did this. ...will probably result in the greatest improvement, along with disabling WITNESS and such if using -CURRENT. See man tuning. oh - i never did it... Using -march=pentium is likely to be worthwhile (assuming you don't have a with heavy CPU-bound userland binaries i measured 10-25% gain. 386 :-), higher than that may run into problems. Higher optimizations than -O are not supported, although work is underway to fix the remaining code issues (mainly in libalias used by NAT), as I understand. If you want to try -O2, give it a shot, but you might consider using either -Os rather than -O2, or try -O2 -fno-strict-aliasing. why -Os? it makes slower but smaller code? will lower memory traffic/better cache hitting give more gain than it's lost because of slower code. 3) how can i disable compiling, using etc.. all that LKM (KLD) stuff? i really prefer one static kernel. Read the handbook on building the kernel. what i missed? i already built a kernel, found how to disable modules but all kld stuff is still compiled in! yes i can just do rm *.ko but removing kld from kernel would be even nicer. 4) is IPv6 working well? (i mean no crashes etc...) i will get real IPv6 zone allocation soon and want to use it. IPv6 seems to work well, yes. 5) what is used in FreeBSD for traffic management. NetBSD has altq - please just give me a name i will RTFM. If you want to use that, ipf/altq should be available in -CURRENT. Otherwise, ipfw dummynet is another choice. 6) how to turn using serial port as console on i386? my home machine is headless, i'm using X terminals to access it. See the handbook. 7) does FreeBSD support 2 CPUs on i386? Sure. See the SMP section of the kernel config file. should i go to 4.10 or better 5.2.1? stability is really important to me. 4.10, unless there's a feature from -CURRENT that you don't want to live without. i don't think it is unless 4.10 has: 1) multiCPU 2) traffic shaping 3) nat 4) firewalling 5) IPv6 6) tun device i don't think i need anything more ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: FreeBSD beginner (NetBSD advanced)
does FreeBSD deallocate pages that are unused. NetBSD does not. if you create 100MB file on mfs and delete it, VM size of mfs is still over 100MB. while it will get swapped out it's a kind of nonsense IMHO FreeBSD tries to swap out idle pages. That means that you'll have more physical memory available for programs, cacheing, etc. So it's nice:) I am not by any means FreeBSD kernel expert. Not at all expert! There is a vmm description on your new FreeBSD system by Matthew Dillon who has made many improvments to it. /usr/share/doc/en/articles/vm-design Cheers, NikV On Friday 16 July 2004 13:38, Wojciech Puchar wrote: I have used a single 256MB mfs on FreeBSD for months without any problem. I was not doing heavy IO on it, it was used in a /tmp fashion and most of the time was swapped out, going down to 8MB resident size at times. does FreeBSD deallocate pages that are unused. NetBSD does not. if you create 100MB file on mfs and delete it, VM size of mfs is still over 100MB. while it will get swapped out it's a kind of nonsense IMHO softdeps in NetBSD is very buggy. putting very high load like deleting huge tree or unpacking it easily triggers DDB with ffs_something panic :( I have the feeling that NetBSD without softdeps performs much better than FreeBSD. I can live without them on NetBSD. i have too. anyway softdeps is big speedup. i tried async and doing sync every 5 seconds. looks good. I think you will miss ALTQ. There is a patch for FreeBSD-4.8 at Kenjiro's page. i read manual page about ipfw yesterday. i think i will not miss :) NikV On Friday 16 July 2004 00:50, Wojciech Puchar wrote: Wojciech Puchar wrote: i installed FreeBSD once to do quick performance tests, and at least in disk I/O and fair scheduling it's MUCH better (tested 4.10 and 5.1). It's nice to be welcomed by higher performance when you switch OSes. :-) while high performance is always cool, stable performance is even more important under load. I mean if i do 5 things it shouldn't slow down 100 times. in NetBSD especially if you start large file copying whole system slows down terribly. not true with FreeBSD. softdeps in NetBSD is very buggy. putting very high load like deleting huge tree or unpacking it easily triggers DDB with ffs_something panic :( my questions: 1) what is Buf and Cache in top exactly? why buf on 96MB machine gets to near 20MB and never goes down? it's almost 1/4 of memory size. Cache: number of pages used for VM-level disk caching Buf: number of pages used for BIO-level disk caching can you explain more? (or redirect me to URL about it) is all things double-buffered?!! it would be lots of memory traffic. BTW is mfs usable and stable in FreeBSD? and does it make real sense? in NetBSD mfs is terribly unstable. especially large mfs disks easily crash things. 2) can i compile kernel with -march=pentium,pentium[234] -O2 optimization? in NetBSD 2.0 doing -march=pentium produces kernel that doesn't boot at all, just resets. If you want to tune your system, tweaking the options from GENERIC by removing at least: cpu I386_CPU cpu I486_CPU did this. ...will probably result in the greatest improvement, along with disabling WITNESS and such if using -CURRENT. See man tuning. oh - i never did it... Using -march=pentium is likely to be worthwhile (assuming you don't have a with heavy CPU-bound userland binaries i measured 10-25% gain. 386 :-), higher than that may run into problems. Higher optimizations than -O are not supported, although work is underway to fix the remaining code issues (mainly in libalias used by NAT), as I understand. If you want to try -O2, give it a shot, but you might consider using either -Os rather than -O2, or try -O2 -fno-strict-aliasing. why -Os? it makes slower but smaller code? will lower memory traffic/better cache hitting give more gain than it's lost because of slower code. 3) how can i disable compiling, using etc.. all that LKM (KLD) stuff? i really prefer one static kernel. Read the handbook on building the kernel. what i missed? i already built a kernel, found how to disable modules but all kld stuff is still compiled in! yes i can just do rm *.ko but removing kld from kernel would be even nicer. 4) is IPv6 working well? (i mean no crashes etc...) i will get real IPv6 zone allocation soon and want to use it. IPv6 seems to work well, yes. 5) what is used in FreeBSD for traffic management. NetBSD has altq - please just give me a name i will RTFM. If you want to use that, ipf/altq should be available in -CURRENT. Otherwise, ipfw dummynet is another choice. 6) how to turn using serial port as console on i386? my home machine is headless, i'm using X terminals to access it. See the handbook. 7) does FreeBSD
Re: FreeBSD beginner (NetBSD advanced)
Wojciech Puchar wrote: my questions: Start here : http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/ ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: FreeBSD beginner (NetBSD advanced)
Wojciech Puchar wrote: i installed FreeBSD once to do quick performance tests, and at least in disk I/O and fair scheduling it's MUCH better (tested 4.10 and 5.1). It's nice to be welcomed by higher performance when you switch OSes. :-) my questions: 1) what is Buf and Cache in top exactly? why buf on 96MB machine gets to near 20MB and never goes down? it's almost 1/4 of memory size. Cache: number of pages used for VM-level disk caching Buf: number of pages used for BIO-level disk caching 2) can i compile kernel with -march=pentium,pentium[234] -O2 optimization? in NetBSD 2.0 doing -march=pentium produces kernel that doesn't boot at all, just resets. If you want to tune your system, tweaking the options from GENERIC by removing at least: cpu I386_CPU cpu I486_CPU ...will probably result in the greatest improvement, along with disabling WITNESS and such if using -CURRENT. See man tuning. Using -march=pentium is likely to be worthwhile (assuming you don't have a 386 :-), higher than that may run into problems. Higher optimizations than -O are not supported, although work is underway to fix the remaining code issues (mainly in libalias used by NAT), as I understand. If you want to try -O2, give it a shot, but you might consider using either -Os rather than -O2, or try -O2 -fno-strict-aliasing. 3) how can i disable compiling, using etc.. all that LKM (KLD) stuff? i really prefer one static kernel. Read the handbook on building the kernel. 4) is IPv6 working well? (i mean no crashes etc...) i will get real IPv6 zone allocation soon and want to use it. IPv6 seems to work well, yes. 5) what is used in FreeBSD for traffic management. NetBSD has altq - please just give me a name i will RTFM. If you want to use that, ipf/altq should be available in -CURRENT. Otherwise, ipfw dummynet is another choice. 6) how to turn using serial port as console on i386? my home machine is headless, i'm using X terminals to access it. See the handbook. 7) does FreeBSD support 2 CPUs on i386? Sure. See the SMP section of the kernel config file. should i go to 4.10 or better 5.2.1? stability is really important to me. 4.10, unless there's a feature from -CURRENT that you don't want to live without. -- -Chuck ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: FreeBSD beginner (NetBSD advanced)
On Thu, Jul 15, 2004 at 08:30:10PM +0200, Wojciech Puchar wrote: i want to go to FreeBSD instead of NetBSD on my i386 machines because of all new features :( introduced in NetBSD after 1.5 mostly crashing softdeps, strange memory/unified disk cache management (large writing to file almost freezes everything) etc. etc. i installed FreeBSD once to do quick performance tests, and at least in disk I/O and fair scheduling it's MUCH better (tested 4.10 and 5.1). my questions: 1) what is Buf and Cache in top exactly? why buf on 96MB machine gets to near 20MB and never goes down? it's almost 1/4 of memory size. These are part of the kernel VM system -- most of that space is used for buffering IO to disk drives or other devices. There are various VM related sysctls you can use to tune things, but unless you've got a pretty exceptional system just going with the defaults will probably give you the best results. 2) can i compile kernel with -march=pentium,pentium[234] -O2 optimization? in NetBSD 2.0 doing -march=pentium produces kernel that doesn't boot at all, just resets. You can certainly compile with a different CPUTYPE setting in /etc/make.conf -- works very well. However under 4.x and any of the releases from 5.x to date you shouldn't use any more that -O optimization. There's a push on to make world+kernel compile correctly using -O2 before 5.3-STABLE, but that's not been completed yet. 3) how can i disable compiling, using etc.. all that LKM (KLD) stuff? i really prefer one static kernel. Generally what happens is that a driver is either built into a kernel image, or it's built as a loadable module. Writing your own kernel configuration to include the drivers for all of your hardware isn't too difficult. You can prevent any LKMs being build by setting: NO_MODULES=true in /etc/make.conf 4) is IPv6 working well? (i mean no crashes etc...) i will get real IPv6 zone allocation soon and want to use it. Works for me. But FreeBSD uses the same Kame IPv6 stack as NetBSD -- 5) what is used in FreeBSD for traffic management. NetBSD has altq - please just give me a name i will RTFM. dummynet(4) 6) how to turn using serial port as console on i386? my home machine is headless, i'm using X terminals to access it. Simple. It's pretty easy to install the system that way too: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/serialconsole-setup.html http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/install-advanced.html 7) does FreeBSD support 2 CPUs on i386? Yes. You will have to compile a custom kernel to get SMP support under 4.x (you can always boot a UP kernel on a MP machine). For 5.x, it should all just work with the GENERIC kernel. Cheers, Matthew -- Dr Matthew J Seaman MA, D.Phil. 26 The Paddocks Savill Way PGP: http://www.infracaninophile.co.uk/pgpkey Marlow Tel: +44 1628 476614 Bucks., SL7 1TH UK pgpWbhqfGEAJF.pgp Description: PGP signature
RE: FreeBSD beginner (NetBSD advanced)
-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Wojciech Puchar Sent: Thursday, July 15, 2004 1:30 PM To: [EMAIL PROTECTED] Subject: FreeBSD beginner (NetBSD advanced) [snip] my questions: 1) what is Buf and Cache in top exactly? why buf on 96MB machine gets to near 20MB and never goes down? it's almost 1/4 of memory size. Don't know. 2) can i compile kernel with -march=pentium,pentium[234] -O2 optimization? in NetBSD 2.0 doing -march=pentium produces kernel that doesn't boot at all, just resets. Don't know. 3) how can i disable compiling, using etc.. all that LKM (KLD) stuff? i really prefer one static kernel. There are many klds that are capable of being statically compiled. I can't say for certain that all of them are, but the one or two I've needed are statically compiled. 4) is IPv6 working well? (i mean no crashes etc...) i will get real IPv6 zone allocation soon and want to use it. AFAIK, it works perfectly. 5) what is used in FreeBSD for traffic management. NetBSD has altq - please just give me a name i will RTFM. Don't know off hand, I haven't had to do much of this yet. Everything I do is with ipfw. 6) how to turn using serial port as console on i386? my home machine is headless, i'm using X terminals to access it. For a headless system, create the file /boot.config and add the following characters to it: -Dh Then, in /etc/ttys, edit the line(s) for your appropriate serial consoles. Mine looks like this: ttyd0 /usr/libexec/getty std.9600 vt100 on secure 7) does FreeBSD support 2 CPUs on i386? Yes, it does. It even supports the Pentium 4 HT processors. sorry if too much questions at once, i would like to move my home machine to FreeBSD tomorrow, test it at real for a month and then (if it will be better than NetBSD for my needs) replace other machines. should i go to 4.10 or better 5.2.1? stability is really important to me. If I were you, I would use 4.10. Keep in mind, though, that the upgrade process from 4.x to 5.x is a complete reinstall, for the most part. I guess there are some people that have been able to do it, but never I or anyone I know here. I've used 5.2.1 on my home machines, but they're just a little too buggy for my liking. ACPI can cause problems, and seems to be the biggest source of bugs. On the other hand, if you need power management, I've never been able to get APM working in 4.x. I hope this helps to answer some of those questions. Eric F Crist ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: FreeBSD beginner (NetBSD advanced)
On Thu, 15 Jul 2004 20:30:10 +0200 (CEST) Wojciech Puchar [EMAIL PROTECTED] wrote: i want to go to FreeBSD instead of NetBSD on my i386 machines because of all new features :( introduced in NetBSD after 1.5 mostly crashing softdeps, strange memory/unified disk cache management (large writing to file almost freezes everything) etc. etc. i installed FreeBSD once to do quick performance tests, and at least in disk I/O and fair scheduling it's MUCH better (tested 4.10 and 5.1). my questions: 1) what is Buf and Cache in top exactly? why buf on 96MB machine gets to near 20MB and never goes down? it's almost 1/4 of memory size. http://www.freebsd.org/doc/en_US.ISO8859-1/books/faq/misc.html (point #2) 2) can i compile kernel with -march=pentium,pentium[234] -O2 optimization? in NetBSD 2.0 doing -march=pentium produces kernel that doesn't boot at all, just resets. the following appears in /etc/make.conf: CFLAGS controls the compiler settings used when compiling C code. Note that optimization settings above -O (-O2, ...) are not recommended or supported for compiling the world or the kernel i'm working with 4.10 and have the following line in my /etc/make.conf CPUTYPE=i686 are either of these were what you were looking for? 3) how can i disable compiling, using etc.. all that LKM (KLD) stuff? i really prefer one static kernel. 4) is IPv6 working well? (i mean no crashes etc...) i will get real IPv6 zone allocation soon and want to use it. 5) what is used in FreeBSD for traffic management. NetBSD has altq - please just give me a name i will RTFM. 6) how to turn using serial port as console on i386? my home machine is headless, i'm using X terminals to access it. is this what you're looking for? http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/serialconsole-setup.html if you've got firewire, you may also want to look at man dcons. 7) does FreeBSD support 2 CPUs on i386? yes, though i have no experience with it. you may care to peruse the handbook (see link above) or check the freebsd-questions mailing list archives http://lists.freebsd.org/pipermail/freebsd-questions/ or google sorry if too much questions at once, i would like to move my home machine to FreeBSD tomorrow, test it at real for a month and then (if it will be better than NetBSD for my needs) replace other machines. should i go to 4.10 or better 5.2.1? stability is really important to me. i would recommend 4.10. though the 5.x series is solid, it is undergoing heavy development. 5.x won't be releasing a 'stable' version until sometime later this year. ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
RE: FreeBSD beginner (NetBSD advanced).
2) can i compile kernel with -march=pentium,pentium[234] -O2 optimization? in NetBSD 2.0 doing -march=pentium produces kernel that doesn't boot at all, just resets. 2.0 is always under develpoment and not yet released. I don't see the problem with 1.6.2. 4) is IPv6 working well? (i mean no crashes etc...) i will get real IPv6 zone allocation soon and want to use it. AFAIK, it works perfectly. Aren't FreeBSD and NetBSD using the same IPv6 stack from the KAME project? 5) what is used in FreeBSD for traffic management. NetBSD has altq - please just give me a name i will RTFM. You can use dummynet with ipfw. Altq is being integrated in the -CURRENT branch of FreeBSD (along with pf). 7) does FreeBSD support 2 CPUs on i386? Yes, it does. It even supports the Pentium 4 HT processors. Yes, but there still some strange report from 'top' on MP systems as in : - Problem Report bin/30310 ; - Problem Report bin/60385. -- -jpeg. ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: FreeBSD beginner (NetBSD advanced)
Wojciech Puchar wrote: i installed FreeBSD once to do quick performance tests, and at least in disk I/O and fair scheduling it's MUCH better (tested 4.10 and 5.1). It's nice to be welcomed by higher performance when you switch OSes. :-) while high performance is always cool, stable performance is even more important under load. I mean if i do 5 things it shouldn't slow down 100 times. in NetBSD especially if you start large file copying whole system slows down terribly. not true with FreeBSD. softdeps in NetBSD is very buggy. putting very high load like deleting huge tree or unpacking it easily triggers DDB with ffs_something panic :( my questions: 1) what is Buf and Cache in top exactly? why buf on 96MB machine gets to near 20MB and never goes down? it's almost 1/4 of memory size. Cache: number of pages used for VM-level disk caching Buf: number of pages used for BIO-level disk caching can you explain more? (or redirect me to URL about it) is all things double-buffered?!! it would be lots of memory traffic. BTW is mfs usable and stable in FreeBSD? and does it make real sense? in NetBSD mfs is terribly unstable. especially large mfs disks easily crash things. 2) can i compile kernel with -march=pentium,pentium[234] -O2 optimization? in NetBSD 2.0 doing -march=pentium produces kernel that doesn't boot at all, just resets. If you want to tune your system, tweaking the options from GENERIC by removing at least: cpu I386_CPU cpu I486_CPU did this. ...will probably result in the greatest improvement, along with disabling WITNESS and such if using -CURRENT. See man tuning. oh - i never did it... Using -march=pentium is likely to be worthwhile (assuming you don't have a with heavy CPU-bound userland binaries i measured 10-25% gain. 386 :-), higher than that may run into problems. Higher optimizations than -O are not supported, although work is underway to fix the remaining code issues (mainly in libalias used by NAT), as I understand. If you want to try -O2, give it a shot, but you might consider using either -Os rather than -O2, or try -O2 -fno-strict-aliasing. why -Os? it makes slower but smaller code? will lower memory traffic/better cache hitting give more gain than it's lost because of slower code. 3) how can i disable compiling, using etc.. all that LKM (KLD) stuff? i really prefer one static kernel. Read the handbook on building the kernel. what i missed? i already built a kernel, found how to disable modules but all kld stuff is still compiled in! yes i can just do rm *.ko but removing kld from kernel would be even nicer. 4) is IPv6 working well? (i mean no crashes etc...) i will get real IPv6 zone allocation soon and want to use it. IPv6 seems to work well, yes. 5) what is used in FreeBSD for traffic management. NetBSD has altq - please just give me a name i will RTFM. If you want to use that, ipf/altq should be available in -CURRENT. Otherwise, ipfw dummynet is another choice. 6) how to turn using serial port as console on i386? my home machine is headless, i'm using X terminals to access it. See the handbook. 7) does FreeBSD support 2 CPUs on i386? Sure. See the SMP section of the kernel config file. should i go to 4.10 or better 5.2.1? stability is really important to me. 4.10, unless there's a feature from -CURRENT that you don't want to live without. i don't think it is unless 4.10 has: 1) multiCPU 2) traffic shaping 3) nat 4) firewalling 5) IPv6 6) tun device i don't think i need anything more ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
