sched /HT processor

From: Arun Srinivas
Date: Sat Apr 02 2005 - 19:39:21 EST

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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).

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?

2) If it has indeed recogonized this as hyperthreaded processor...does the scheduler use a common runqueue for the 2 logical processor?

(please read below)
*********************************************************************************************************
(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 (root@kulick2) (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

From: postmaster@xxxxxxxxxxxxxxxx
To: getarunsri@xxxxxxxxxxx
Subject: Delivery Status Notification (Failure)
Date: Sat, 2 Apr 2005 16:01:39 -0800

This is an automatically generated Delivery Status Notification.

Delivery to the following recipients failed.

linux-kernel@xxxxxxxxxxxxxxx

<< attach3 >>
<< message4.txt >>

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Next message: Joseph E. Sacco, Ph.D.: "prepatch 2.6.12-rc1 does not apply cleanly to linux-2.6.11.6"
Previous message: Steven Rostedt: "Re: [patch] Real-Time Preemption, -RT-2.6.12-rc1-V0.7.43-00"
Next in thread: Steven Rostedt: "Re: sched /HT processor"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]