Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261434AbVDCCQf (ORCPT ); Sat, 2 Apr 2005 21:16:35 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261439AbVDCCQf (ORCPT ); Sat, 2 Apr 2005 21:16:35 -0500 Received: from omc1-s15.bay6.hotmail.com ([65.54.248.217]:11585 "EHLO OMC1-S15.phx.gbl") by vger.kernel.org with ESMTP id S261434AbVDCCQI (ORCPT ); Sat, 2 Apr 2005 21:16:08 -0500 Message-ID: X-Originating-IP: [146.229.160.228] X-Originating-Email: [getarunsri@hotmail.com] In-Reply-To: <1112491074.27149.95.camel@localhost.localdomain> From: "Arun Srinivas" To: rostedt@goodmis.org Cc: linux-kernel@vger.kernel.org Subject: Re: sched /HT processor Date: Sun, 03 Apr 2005 07:46:06 +0530 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 03 Apr 2005 02:16:06.0804 (UTC) FILETIME=[17EEE540:01C537F3] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 11425 Lines: 272 I attached the 'dmesg' output because there it shows that my kernel recogonized 2 cpu's.As said earlier , are they treated as 2 physical cpu's or logical cpu's? >From: Steven Rostedt >To: Arun Srinivas >CC: LKML >Subject: Re: sched /HT processor >Date: Sat, 02 Apr 2005 20:17:54 -0500 > >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 > > (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 > >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 > _________________________________________________________________ Make money with Zero Investment. http://adfarm.mediaplex.com/ad/ck/4686-26272-10936-31?ck=RegSell Start your business. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/