Hi,
I just checked the kernel info for the memory support part: â If you are compiling a kernel which will never run on a machine with â â more than 960 megabytes of total physical RAM, answer "off" here (defau â â choice and suitable for most users). This will result in a "3GB/1GB" â â split: 3GB are mapped so that each process sees a 3GB virtual memory â â space and the remaining part of the 4GB virtual memory space is used â â by the kernel to permanently map as much physical memory as â â possible. â â â â If the machine has between 1 and 4 Gigabytes physical RAM, then â â answer "4GB" here. â â I guess with 1.5Gb RAM you need to go with the 4Gb option... so that won't work :-( and having just 960M RAM wouldn't work either... > > > > Hi, > > > > Interesting info... especially the part: > > > > > Do you have high memory support compiled in ? > > > High memory support above 4GB might cause problems. > > > > > > If you do not have more than 2GB of RAM you should make sure that High > > > memory support is not enabled. > > > > The server has 1.5Gb RAM. I compiled it to have High Memory support > (4Gb) > > because I don't know how much more RAM it may have added in the future. > I > > suppose I could try going back as you suggested, but the Kernel info > > suggests that the 4Gb RAM High memory support *should* work for RAM less > > than that too :-/ > > > > Most frustrating. I will try re-compiling with your suggestion a bit > later > > today, and let you know how it turns out. > > > > > > ----- Original Message ----- > > From: "Theodore Knab" <[EMAIL PROTECTED]> > > To: <debian-isp@lists.debian.org> > > Sent: Wednesday, December 17, 2003 10:07 AM > > Subject: Re: Intel Hyperthreading problem on server? > > > > > > > I am using the 2.4.20 kernel with SMP support on a Hyper-threading > > > Intel. I remember having problems getting it work with SMP support > > > initially. > > > > > > I think the kernel has to be perfect. ;-) > > > > > > Do you have high memory support compiled in ? > > > High memory support above 4GB might cause problems. > > > > > > If you do not have more than 2GB of RAM you should make sure that High > > > memory support is not enabled. > > > > > > Also did you enable hyper-threading in BIOS ? > > > Auto-detect modes might cause problems. > > > > > > http://publib-b.boulder.ibm.com/Redbooks.nsf/RedbookAbstracts/tips0175.html?Open > > > > > > My system: > > > > > > Linux tedsdesk 2.4.20 #22 SMP Mon Jul 21 14:53:07 EDT 2003 i686 > > > GNU/Linux > > > > > > [EMAIL PROTECTED]:cat /proc/cpuinfo > > > processor : 0 > > > vendor_id : GenuineIntel > > > cpu family : 15 > > > model : 1 > > > model name : Intel(R) Pentium(R) 4 CPU 1.50GHz > > > stepping : 2 > > > cpu MHz : 1495.172 > > > cache size : 256 KB > > > fdiv_bug : no > > > hlt_bug : no > > > f00f_bug : no > > > coma_bug : no > > > fpu : yes > > > fpu_exception : yes > > > cpuid level : 2 > > > wp : yes > > > flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge > > > mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm > > > bogomips : 2981.88 > > > > > > The ht in the flags section tells me hyper threading is being > > recognized. > > > > > > On 16/12/03 23:23 +0800, Jason Lim wrote: > > > > Hi All... > > > > > > > > Do you guys know anything about a problem with Intel Hyper-threading > > (eg. > > > > on the Intel 2.4Ghz HT-enabled processor) that would cause the load > > > > average to jump to over 200? > > > > > > > > Here is the log line: > > > > > > > > Dec 16 22:48:17 be watchdog[250]: loadavg 203 101 40 is higher than > > the > > > > given threshold 200 150 100! > > > > > > > > (then it reboots) > > > > > > > > This happened on the 2.4.22 kernel, and now I tried it with the > 2.4.23 > > > > kernel, and it has the same problem. > > > > > > > > When the kernel is compiled WITHOUT SMP support, the kernel works > > fine, > > > > and it can have uptimes of months without any problem. But when SMP > is > > > > compiled in, and the HT processor is correctly identified (and top > can > > see > > > > CPU0 and CPU1), then it only takes about an hour or two of operation > > > > before the load average jumps like that. Note that this is with > Debian > > > > woody/stable, and with a clean kernel.org kernel. > > > > > > > > Do you guys know anything about this, or have any ideas where I > should > > > > look? Is there something in Woody that isn't friendly with SMP or > > perhaps > > > > Hyper-Threading processors? > > > > > > > > Thanks in advance. > > > > > > > > Sincerely, > > > > Jas > > > > > > > > > > > > -- > > > > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > > > > with a subject of "unsubscribe". Trouble? Contact > > [EMAIL PROTECTED] > > > > > > > > > > -- > > > ------------------------------------------ > > > Ted Knab > > > Chester, MD 21619 > > > ------------------------------------------ > > > 35570707f6274702478656021626f6c6964796f6e602f66602478656 > > > 02e6164796f6e60237471647560216e6460276c6f62616c60257e696 > > > 4797e2a0 > > > > > > > > > -- > > > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > > > with a subject of "unsubscribe". Trouble? Contact > > [EMAIL PROTECTED] > > > > > > > > > > > > -- > > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > > with a subject of "unsubscribe". Trouble? Contact > [EMAIL PROTECTED] > > > > >
