On Sun, 2005-04-03 at 06:07 +0530, Arun Srinivas wrote: > HI > > I have pentium4 hyperthreaded processor.I am using kernel 2.6.5 and i > rebuilt my kernel with CONFIG_SMP enabled (in this kernel source there is > nothing such as CONFIG_SMT...i noticed this only in recent 2.6.11). >
I don't have a 2.6.5 available, but I do have a 2.6.9 to look at. > 1) So, after I rebulit it with CONFIG_SMP enabled does linux recogonize my > machine as hyperthreaded or as 2 seperate processor? Also, if it does not > recogonize it as hyperthreaded(but only as 2 seperate CPU's), does the > scheduler schedule instruction in the 2 cpu's independently? (does it > maintain 2 seperate runqueues? > I believe even HT on 2.6.11 maintains two different runqueues. But it doesn't care so much to jump from one runqueue to the next if it is HT. > 2) If it has indeed recogonized this as hyperthreaded processor...does the > scheduler use a common runqueue for the 2 logical processor? > No, you wouldn't want to. > (please read below) What do you want us to see? > ********************************************************************************************************* > (I am attaching the ouput of 'dmesg' (command) on my machine) > ************************************************************************************************************* > Apr 2 17:43:12 kulick2 kernel: Linux version 2.6.5-1.358custom > ([EMAIL PROTECTED]) (gcc version 3.3 > .3 20040412 (Red Hat Linux 3.3.3-7)) #133 SMP Wed Mar 30 12:16:27 CST 2005 > Apr 2 17:43:12 kulick2 kernel: BIOS-provided physical RAM map: > Apr 2 17:43:12 kulick2 kernel: BIOS-e820: 0000000000000000 - > 00000000000a0000 (usable) > Apr 2 17:43:12 kulick2 kernel: BIOS-e820: 00000000000f0000 - > 0000000000100000 (reserved) > Apr 2 17:43:12 kulick2 kernel: BIOS-e820: 0000000000100000 - > 000000001f770000 (usable) > Apr 2 17:43:12 kulick2 kernel: BIOS-e820: 000000001f770000 - > 000000001f772000 (ACPI NVS) > Apr 2 17:43:12 kulick2 kernel: BIOS-e820: 000000001f772000 - > 000000001f793000 (ACPI data) > Apr 2 17:43:12 kulick2 kernel: BIOS-e820: 000000001f793000 - > 000000001f800000 (reserved) > Apr 2 17:43:12 kulick2 kernel: BIOS-e820: 00000000fec00000 - > 00000000fec10000 (reserved) > Apr 2 17:43:12 kulick2 kernel: BIOS-e820: 00000000fecf0000 - > 00000000fecf1000 (reserved) > Apr 2 17:43:12 kulick2 kernel: BIOS-e820: 00000000fed20000 - > 00000000fed90000 (reserved) > Apr 2 17:43:12 kulick2 kernel: BIOS-e820: 00000000fee00000 - > 00000000fee10000 (reserved) > Apr 2 17:43:12 kulick2 kernel: BIOS-e820: 00000000ffb00000 - > 0000000100000000 (reserved) > Apr 2 17:43:12 kulick2 kernel: 0MB HIGHMEM available. > Apr 2 17:43:12 kulick2 kernel: 503MB LOWMEM available. > Apr 2 17:43:12 kulick2 kernel: ACPI: S3 and PAE do not like each other for > now, S3 disabled. > Apr 2 17:43:12 kulick2 kernel: found SMP MP-table at 000fe710 > Apr 2 17:43:12 kulick2 kernel: On node 0 totalpages: 128880 > Apr 2 17:43:12 kulick2 kernel: DMA zone: 4096 pages, LIFO batch:1 > Apr 2 17:43:12 kulick2 kernel: Normal zone: 124784 pages, LIFO batch:16 > Apr 2 17:43:12 kulick2 kernel: HighMem zone: 0 pages, LIFO batch:1 > Apr 2 17:43:12 kulick2 kernel: DMI 2.3 present. > Apr 2 17:43:12 kulick2 kernel: Using APIC driver default > Apr 2 17:43:12 kulick2 kernel: ACPI: RSDP (v000 DELL > ) @ > 0x000feba0 > Apr 2 17:43:12 kulick2 kernel: ACPI: RSDT (v001 DELL GX270 0x00000007 > ASL 0x00000061) @ > 0x000fd192 > Apr 2 17:43:12 kulick2 kernel: ACPI: FADT (v001 DELL GX270 0x00000007 > ASL 0x00000061) @ > 0x000fd1ca > Apr 2 17:43:12 kulick2 kernel: ACPI: SSDT (v001 DELL st_ex 0x00001000 > MSFT 0x0100000d) @ > 0xfffd4eee > Apr 2 17:43:12 kulick2 irqbalance: irqbalance startup succeeded > Apr 2 17:43:12 kulick2 kernel: ACPI: MADT (v001 DELL GX270 0x00000007 > ASL 0x00000061) @ > 0x000fd23e > Apr 2 17:43:12 kulick2 kernel: ACPI: BOOT (v001 DELL GX270 0x00000007 > ASL 0x00000061) @ > 0x000fd2aa > Apr 2 17:43:12 kulick2 kernel: ACPI: ASF! (v016 DELL GX270 0x00000007 > ASL 0x00000061) @ > 0x000fd2d2 > Apr 2 17:43:12 kulick2 kernel: ACPI: DSDT (v001 DELL dt_ex 0x00001000 > MSFT 0x0100000d) @ > 0x00000000 > Apr 2 17:43:12 kulick2 kernel: ACPI: PM-Timer IO Port: 0x808 > Apr 2 17:43:12 kulick2 kernel: ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] > enabled) > Apr 2 17:43:12 kulick2 kernel: Processor #0 15:2 APIC version 20 > Apr 2 17:43:12 kulick2 kernel: ACPI: LAPIC (acpi_id[0x02] lapic_id[0x01] > enabled) > Apr 2 17:43:12 kulick2 kernel: Processor #1 15:2 APIC version 20 > Apr 2 17:43:12 kulick2 kernel: ACPI: LAPIC (acpi_id[0x03] lapic_id[0x01] > disabled) > Apr 2 17:43:12 kulick2 kernel: ACPI: LAPIC (acpi_id[0x04] lapic_id[0x03] > disabled) > Apr 2 17:43:12 kulick2 kernel: ACPI: IOAPIC (id[0x02] address[0xfec00000] > global_irq_base[0x0] > ) > Apr 2 17:43:12 kulick2 kernel: IOAPIC[0]: Assigned apic_id 2 > Apr 2 17:43:12 kulick2 kernel: IOAPIC[0]: apic_id 2, version 32, address > 0xfec00000, GSI 0-23 > Apr 2 17:43:12 kulick2 kernel: ACPI: INT_SRC_OVR (bus 0 bus_irq 0 > global_irq 2 dfl dfl) > Apr 2 17:43:12 kulick2 kernel: ACPI: INT_SRC_OVR (bus 0 bus_irq 9 > global_irq 9 high level) > Apr 2 17:43:12 kulick2 kernel: Enabling APIC mode: Flat. Using 1 I/O > APICs > Apr 2 17:43:12 kulick2 kernel: Using ACPI (MADT) for SMP configuration > information > Apr 2 17:43:12 kulick2 portmap: portmap startup succeeded > Apr 2 17:43:12 kulick2 kernel: Built 1 zonelists > Apr 2 17:43:12 kulick2 kernel: Kernel command line: ro root=LABEL=/ rhgb > quiet > Apr 2 17:43:12 kulick2 kernel: mapped 4G/4G trampoline to fffeb000. > Apr 2 17:43:12 kulick2 kernel: Initializing CPU#0 > Apr 2 17:43:12 kulick2 kernel: CPU 0 irqstacks, hard=023cb000 soft=023ab000 > Apr 2 17:43:12 kulick2 kernel: PID hash table entries: 2048 (order 11: > 16384 bytes) > Apr 2 17:43:12 kulick2 kernel: Detected 2993.225 MHz processor. > Apr 2 17:43:12 kulick2 kernel: Using pmtmr for high-res timesource > Apr 2 17:43:12 kulick2 kernel: Console: colour VGA+ 80x25 > Apr 2 17:43:12 kulick2 kernel: Memory: 505996k/515520k available (1744k > kernel code, 8772k res > erved, 756k data, 180k init, 0k highmem) > Apr 2 17:43:12 kulick2 kernel: Calibrating delay loop... 5931.00 BogoMIPS > Apr 2 17:43:12 kulick2 kernel: Security Scaffold v1.0.0 initialized > Apr 2 17:43:12 kulick2 kernel: SELinux: Initializing. > Apr 2 17:43:12 kulick2 kernel: SELinux: Starting in permissive mode > Apr 2 17:43:12 kulick2 kernel: There is already a security framework > initialized, register_sec > urity failed. > Apr 2 17:43:12 kulick2 kernel: Failure registering capabilities with the > kernel > Apr 2 17:43:12 kulick2 kernel: selinux_register_security: Registering > secondary module capabi > lity > Apr 2 17:43:12 kulick2 kernel: Capability LSM initialized > Apr 2 17:43:12 kulick2 kernel: Dentry cache hash table entries: 32768 > (order: 5, 131072 bytes) > Apr 2 17:43:12 kulick2 kernel: Inode-cache hash table entries: 32768 > (order: 5, 131072 bytes) > Apr 2 17:43:12 kulick2 kernel: Mount-cache hash table entries: 512 (order: > 0, 4096 bytes) > Apr 2 17:43:12 kulick2 kernel: CPU: Trace cache: 12K uops, L1 D cache: 8K > Apr 2 17:43:12 kulick2 rpc.statd[2019]: Version 1.0.6 Starting > Apr 2 17:43:12 kulick2 kernel: CPU: L2 cache: 512K > Apr 2 17:43:12 kulick2 kernel: CPU: Physical Processor ID: 0 > Apr 2 17:43:12 kulick2 rpc.statd[2019]: gethostbyname error for kulick2 > Apr 2 17:43:12 kulick2 kernel: Intel machine check architecture supported. > Apr 2 17:43:12 kulick2 kernel: Intel machine check reporting enabled on > CPU#0. > Apr 2 17:43:12 kulick2 nfslock: rpc.statd startup succeeded > Apr 2 17:43:12 kulick2 kernel: CPU#0: Intel P4/Xeon Extended MCE MSRs (12) > available > Apr 2 17:43:12 kulick2 kernel: CPU#0: Thermal monitoring enabled > Apr 2 17:43:12 kulick2 kernel: Enabling fast FPU save and restore... done. > Apr 2 17:43:12 kulick2 kernel: Enabling unmasked SIMD FPU exception > support... done. > Apr 2 17:43:12 kulick2 kernel: Checking 'hlt' instruction... OK. > Apr 2 17:43:12 kulick2 kernel: POSIX conformance testing by UNIFIX > Apr 2 17:43:12 kulick2 kernel: CPU0: Intel(R) Pentium(R) 4 CPU 3.00GHz > stepping 09 > Apr 2 17:43:12 kulick2 kernel: per-CPU timeslice cutoff: 1462.93 usecs. > Apr 2 17:43:12 kulick2 kernel: task migration cache decay timeout: 2 msecs. > Apr 2 17:43:12 kulick2 kernel: enabled ExtINT on CPU#0 > Apr 2 17:43:12 kulick2 kernel: ESR value before enabling vector: 00000040 > Apr 2 17:43:12 kulick2 kernel: ESR value after enabling vector: 00000000 > Apr 2 17:43:12 kulick2 kernel: Booting processor 1/1 eip 2000 > Apr 2 17:43:12 kulick2 kernel: CPU 1 irqstacks, hard=023cc000 soft=023ac000 > Apr 2 17:43:12 kulick2 kernel: Initializing CPU#1 > Apr 2 17:43:12 kulick2 kernel: masked ExtINT on CPU#1 > Apr 2 17:43:12 kulick2 kernel: ESR value before enabling vector: 00000000 > Apr 2 17:43:12 kulick2 kernel: ESR value after enabling vector: 00000000 > Apr 2 17:43:12 kulick2 kernel: Calibrating delay loop... 5980.16 BogoMIPS > Apr 2 17:43:12 kulick2 kernel: CPU: Trace cache: 12K uops, L1 D cache: 8K > Apr 2 17:43:12 kulick2 kernel: CPU: L2 cache: 512K > Apr 2 17:43:12 kulick2 kernel: CPU: Physical Processor ID: 0 > Apr 2 17:43:12 kulick2 kernel: Intel machine check architecture supported. > Apr 2 17:43:12 kulick2 kernel: Intel machine check reporting enabled on > CPU#1. > Apr 2 17:43:12 kulick2 kernel: CPU#1: Intel P4/Xeon Extended MCE MSRs (12) > available > Apr 2 17:43:12 kulick2 kernel: CPU#1: Thermal monitoring enabled > Apr 2 17:43:12 kulick2 kernel: CPU1: Intel(R) Pentium(R) 4 CPU 3.00GHz > stepping 09 > Apr 2 17:43:12 kulick2 kernel: Total of 2 processors activated (11911.16 > BogoMIPS). > Apr 2 17:43:12 kulick2 kernel: cpu_sibling_map[0] = 1 > Apr 2 17:43:12 kulick2 kernel: cpu_sibling_map[1] = 0 Here you see that you have two CPUs. 0 is the sibling of 1 and 1 to 0. This just shows that you have HT. If you were to have a dual xeon, then you would see 4 CPUs and two pairs. -- Steve - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
