Let's buy GIMPS an Opteron! - Page 10

Xyzzy · 2003-12-21, 00:24

A long time ago I changeed the time slice on my old Sun from 10ms to 1ms and it made a huge difference too... I'm not sure what the setting here is...

Here is a blurb from menuconfig...

Quote:

This option reduces the latency of the kernel when reacting to real-time or interactive events by allowing a low priority process to be preempted even if it is in kernel mode executing a system call. This allows applications to run more reliably even when the system is under load. On contrary it may also break your drivers and add priority inheritance problems to your system. Don't select it if you rely on a stable system or have slightly obscure hardware. It's also not very well tested on x86-64 currently. You have been warned. Say Y here if you are feeling brave and building a kernel for a desktop, embedded or real-time system. Say N if you are unsure.

It is set right now to "N"...

Xyzzy · 2003-12-21, 00:27

Here is a listing of param.h

Code:

#ifndef _ASMx86_64_PARAM_H
#define _ASMx86_64_PARAM_H

#ifdef __KERNEL__
# define HZ            1000            /* Internal kernel timer frequency */
# define USER_HZ       100          /* .. some user interfaces are in "ticks */
#define CLOCKS_PER_SEC        (USER_HZ)       /* like times() */
#endif

#ifndef HZ
#define HZ 100
#endif

#define EXEC_PAGESIZE   4096

#ifndef NGROUPS
#define NGROUPS         32
#endif

#ifndef NOGROUP
#define NOGROUP         (-1)
#endif

#define MAXHOSTNAMELEN  64      /* max length of hostname */

#endif

Xyzzy · 2003-12-21, 00:40

Our current dmesg...

Code:

Bootdata ok (command line is root=/dev/hda2 vga=773  acpi=off splash=silent splash=silent)
Linux version 2.6.0 (root@opteron) (gcc version 3.3 (SuSE Linux)) #2 Thu Dec 18 01:22:39 EST 2003
BIOS-provided physical RAM map:
 BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
 BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
 BIOS-e820: 00000000000e0000 - 0000000000100000 (reserved)
 BIOS-e820: 0000000000100000 - 000000001fff0000 (usable)
 BIOS-e820: 000000001fff0000 - 000000001ffff000 (ACPI data)
 BIOS-e820: 000000001ffff000 - 0000000020000000 (ACPI NVS)
 BIOS-e820: 00000000ff7c0000 - 0000000100000000 (reserved)
ACPI: have wakeup address 0x10000001000
found SMP MP-table at 000ff780
hm, page 000ff000 reserved twice.
hm, page 00100000 reserved twice.
hm, page 000f9000 reserved twice.
hm, page 000fa000 reserved twice.
On node 0 totalpages: 131056
  DMA zone: 4096 pages, LIFO batch:1
  Normal zone: 126960 pages, LIFO batch:16
  HighMem zone: 0 pages, LIFO batch:1
Intel MultiProcessor Specification v1.1
    Virtual Wire compatibility mode.
OEM ID: TYAN     <6>Product ID: S2880        <6>APIC at: 0xFEE00000
Processor #0 15:5 APIC version 16
I/O APIC #1 Version 17 at 0xFEC00000.
Processors: 1
Checking aperture...
CPU 0: aperture @ 4000000 size 32 MB
Aperture from northbridge cpu 0 too small (32 MB)
No AGP bridge found
Your BIOS doesn't leave a aperture memory hole
Please enable the IOMMU option in the BIOS setup
This costs you 64 MB of RAM
Mapping aperture over 65536 KB of RAM @ 4000000
Building zonelist for node : 0
Kernel command line: root=/dev/hda2 vga=773  acpi=off splash=silent splash=silent console=tty0
Initializing CPU#0
PID hash table entries: 16 (order 4: 256 bytes)
time.c: Using 1.193182 MHz PIT timer.
time.c: Detected 1396.036 MHz processor.
Console: colour VGA+ 80x25
Memory: 443828k/524224k available (2242k kernel code, 79656k reserved, 906k data, 160k init)
Calibrating delay loop... 2744.32 BogoMIPS
Dentry cache hash table entries: 65536 (order: 7, 524288 bytes)
Inode-cache hash table entries: 32768 (order: 6, 262144 bytes)
Mount-cache hash table entries: 256 (order: 0, 4096 bytes)
CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)
CPU: L2 Cache: 1024K (64 bytes/line)
CPU: AMD Opteron(tm) Processor 140 stepping 01
POSIX conformance testing by UNIFIX
watchdog: setting K7_PERFCTR0 to ffeab2e0
testing NMI watchdog ... OK.
ENABLING IO-APIC IRQs
Using IO-APIC 1
...changing IO-APIC physical APIC ID to 1 ... ok.
init IO_APIC IRQs
 IO-APIC (apicid-pin) 1-0, 1-9, 1-10, 1-11, 1-17, 1-20, 1-21, 1-22, 1-23 not connected.
..TIMER: vector=0x31 pin1=2 pin2=0
number of MP IRQ sources: 18.
number of IO-APIC #1 registers: 24.
testing the IO APIC.......................

IO APIC #1......
.... register #00: 01000000
.......    : physical APIC id: 01
.... register #01: 00170011
.......     : max redirection entries: 0017
.......     : PRQ implemented: 0
.......     : IO APIC version: 0011
.... register #02: 01000000
.......     : arbitration: 01
.... IRQ redirection table:
 NR Log Phy Mask Trig IRR Pol Stat Dest Deli Vect:
 00 000 00  1    0    0   0   0    0    0    00
 01 001 01  0    0    0   0   0    1    1    39
 02 001 01  0    0    0   0   0    1    1    31
 03 001 01  0    0    0   0   0    1    1    41
 04 001 01  0    0    0   0   0    1    1    49
 05 001 01  0    0    0   0   0    1    1    51
 06 001 01  0    0    0   0   0    1    1    59
 07 001 01  0    0    0   0   0    1    1    61
 08 001 01  0    0    0   0   0    1    1    69
 09 000 00  1    0    0   0   0    0    0    00
 0a 000 00  1    0    0   0   0    0    0    00
 0b 000 00  1    0    0   0   0    0    0    00
 0c 001 01  0    0    0   0   0    1    1    71
 0d 001 01  0    0    0   0   0    1    1    79
 0e 001 01  0    0    0   0   0    1    1    81
 0f 001 01  0    0    0   0   0    1    1    89
 10 001 01  1    1    0   1   0    1    1    91
 11 000 00  1    0    0   0   0    0    0    00
 12 001 01  1    1    0   1   0    1    1    99
 13 001 01  1    1    0   1   0    1    1    A1
 14 000 00  1    0    0   0   0    0    0    00
 15 000 00  1    0    0   0   0    0    0    00
 16 000 00  1    0    0   0   0    0    0    00
 17 000 00  1    0    0   0   0    0    0    00
IRQ to pin mappings:
IRQ0 -> 0:2
IRQ1 -> 0:1
IRQ3 -> 0:3
IRQ4 -> 0:4
IRQ5 -> 0:5
IRQ6 -> 0:6
IRQ7 -> 0:7
IRQ8 -> 0:8
IRQ12 -> 0:12
IRQ13 -> 0:13
IRQ14 -> 0:14
IRQ15 -> 0:15
IRQ16 -> 0:16
IRQ18 -> 0:18
IRQ19 -> 0:19
.................................... done.
Using local APIC timer interrupts.
Detected 12.464 MHz APIC timer.
NET: Registered protocol family 16
PCI: Using configuration type 1
mtrr: v2.0 (20020519)
ACPI: Subsystem revision 20031002
ACPI: Interpreter disabled.
SCSI subsystem initialized
ACPI: ACPI tables contain no PCI IRQ routing entries
PCI: Invalid ACPI-PCI IRQ routing table
PCI: Probing PCI hardware
PCI: Probing PCI hardware (bus 00)
PCI: Using IRQ router default [1022/746b] at 0000:00:07.3
PCI->APIC IRQ transform: (B0,I7,P3) -> 19
PCI->APIC IRQ transform: (B1,I0,P3) -> 19
PCI->APIC IRQ transform: (B1,I0,P3) -> 19
PCI->APIC IRQ transform: (B1,I11,P0) -> 18
PCI->APIC IRQ transform: (B1,I13,P0) -> 19
PCI->APIC IRQ transform: (B1,I14,P0) -> 16
PCI-DMA: Disabling AGP.
PCI-DMA: aperture base @ 4000000 size 65536 KB
PCI-DMA: Reserving 64MB of IOMMU area in the AGP aperture
IA32 emulation $Id: sys_ia32.c,v 1.32 2002/03/24 13:02:28 ak Exp $
Installing knfsd (copyright (C) 1996 okir@monad.swb.de).
  utmisc-0745 [03] ut_acquire_mutex      : Thread 1 could not acquire Mutex [ACPI_MTX_Memory] AE_BAD_PARAMETER
pty: 256 Unix98 ptys configured
Real Time Clock Driver v1.12
hw_random: AMD768 system management I/O registers at 0x5000.
hw_random hardware driver 1.0.0 loaded
Linux agpgart interface v0.100 (c) Dave Jones
Hangcheck: starting hangcheck timer 0.5.0 (tick is 180 seconds, margin is 60 seconds).
Serial: 8250/16550 driver $Revision: 1.90 $ 8 ports, IRQ sharing disabled
ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
Using anticipatory io scheduler
FDC 0 is a post-1991 82077
RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize
loop: loaded (max 8 devices)
tg3.c:v2.3 (November 5, 2003)
0000:01:0d.0: Force SAC with mask ffffffffffffffff
eth0: Tigon3 [partno(BCM95705C3) rev 3003 PHY(5705)] (PCI:33MHz:32-bit) 10/100/1000BaseT Ethernet 00:e0:81:60:06:46
0000:01:0e.0: Force SAC with mask ffffffffffffffff
eth1: Tigon3 [partno(BCM95705C3) rev 3003 PHY(5705)] (PCI:33MHz:32-bit) 10/100/1000BaseT Ethernet 00:e0:81:60:06:47
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
AMD8111: IDE controller at PCI slot 0000:00:07.1
AMD8111: chipset revision 3
AMD8111: not 100% native mode: will probe irqs later
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
AMD8111: 0000:00:07.1 (rev 03) UDMA133 controller
    ide0: BM-DMA at 0xffa0-0xffa7, BIOS settings: hda:DMA, hdb:pio
    ide1: BM-DMA at 0xffa8-0xffaf, BIOS settings: hdc:pio, hdd:pio
hda: WDC WD400JB-00ENA0, ATA DISK drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
hda: max request size: 128KiB
hda: 78165360 sectors (40020 MB) w/8192KiB Cache, CHS=65535/16/63, UDMA(100)
 hda: hda1 hda2 hda3
Fusion MPT base driver 2.05.00.03
Copyright (c) 1999-2002 LSI Logic Corporation
mptbase: 0 MPT adapters found, 0 installed.
Fusion MPT SCSI Host driver 2.05.00.03
mice: PS/2 mouse device common for all mice
serio: i8042 AUX port at 0x60,0x64 irq 12
input: AT Translated Set 2 keyboard on isa0060/serio0
serio: i8042 KBD port at 0x60,0x64 irq 1
Intel 810 + AC97 Audio, version 0.24, 01:21:42 Dec 18 2003
oprofile: using NMI interrupt.
NET: Registered protocol family 2
IP: routing cache hash table of 4096 buckets, 32Kbytes
TCP: Hash tables configured (established 32768 bind 32768)
NET: Registered protocol family 1
NET: Registered protocol family 17
found reiserfs format "3.6" with standard journal
Reiserfs journal params: device hda2, size 8192, journal first block 18, max trans len 1024, max batch 900, max commit age 30, max trans age 30
reiserfs: checking transaction log (hda2) for (hda2)
Using r5 hash to sort names
VFS: Mounted root (reiserfs filesystem) readonly.
Freeing unused kernel memory: 160k freed
Adding 1012084k swap on /dev/hda3.  Priority:42 extents:1
tg3: eth0: Link is up at 100 Mbps, full duplex.
tg3: eth0: Flow control is off for TX and off for RX.

Xyzzy · 2003-12-21, 00:58

An experiment:

I disabled scsi, apm, acpi, sound, profiling support, kernel debugging, force IOMMU to on, K8 Machine check debugging mode and IOMMU support...

Timings before:

Code:

AMD Opteron(tm) Processor 140
CPU speed: 1396.12 MHz
CPU features: RDTSC, CMOV, PREFETCH, MMX, SSE, SSE2
L1 cache size: 64 KB
L2 cache size: 1024 KB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
L1 TLBS: 32
L2 TLBS: 512
Prime95 version 23.5, RdtscTiming=1
Best time for 384K FFT length: 32.888 ms.
Best time for 448K FFT length: 39.325 ms.
Best time for 512K FFT length: 44.658 ms.
Best time for 640K FFT length: 55.494 ms.
Best time for 768K FFT length: 67.630 ms.
Best time for 896K FFT length: 81.642 ms.
Best time for 1024K FFT length: 92.040 ms.
Best time for 1280K FFT length: 123.933 ms.
Best time for 1536K FFT length: 151.438 ms.
Best time for 1792K FFT length: 181.381 ms.
Best time for 2048K FFT length: 204.414 ms.
Best time for 2560K FFT length: 262.163 ms.
Best time for 3072K FFT length: 325.316 ms.
Best time for 3584K FFT length: 393.170 ms.
Best time for 4096K FFT length: 441.877 ms.

Timings after:

Code:

AMD Opteron(tm) Processor 140
CPU speed: 1396.48 MHz
CPU features: RDTSC, CMOV, PREFETCH, MMX, SSE, SSE2
L1 cache size: 64 KB
L2 cache size: 1024 KB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
L1 TLBS: 32
L2 TLBS: 512
Prime95 version 23.5, RdtscTiming=1
Best time for 384K FFT length: 32.883 ms.
Best time for 448K FFT length: 39.403 ms.
Best time for 512K FFT length: 44.433 ms.
Best time for 640K FFT length: 55.312 ms.
Best time for 768K FFT length: 67.480 ms.
Best time for 896K FFT length: 81.606 ms.
Best time for 1024K FFT length: 92.092 ms.
Best time for 1280K FFT length: 123.841 ms.
Best time for 1536K FFT length: 151.233 ms.
Best time for 1792K FFT length: 181.395 ms.
Best time for 2048K FFT length: 204.373 ms.
Best time for 2560K FFT length: 262.083 ms.
Best time for 3072K FFT length: 325.414 ms.
Best time for 3584K FFT length: 393.316 ms.
Best time for 4096K FFT length: 441.792 ms.

It looks like all of these options have little or no effect...

aaronl · 2003-12-21, 02:10

Quote:

Originally posted by Xyzzy
An experiment:

I disabled scsi, apm, acpi, sound, profiling support, kernel debugging, force IOMMU to on, K8 Machine check debugging mode and IOMMU support...

Again, I suggest changing HZ ("Internal kernel timer frequency") from 1000 to 100 and seeing if you regain any of the performance.

Xyzzy · 2003-12-21, 02:16

I'm working on it...

Is the value 1/x? For example, 1s / 1000 = 1ms timeslice therefore 1s / 100 = 10ms timeslice?

Xyzzy · 2003-12-21, 02:29

Set to 100...

Code:

AMD Opteron(tm) Processor 140
CPU speed: 1396.16 MHz
CPU features: RDTSC, CMOV, PREFETCH, MMX, SSE, SSE2
L1 cache size: 64 KB
L2 cache size: 1024 KB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
L1 TLBS: 32
L2 TLBS: 512
Prime95 version 23.5, RdtscTiming=1
Best time for 384K FFT length: 32.559 ms.
Best time for 448K FFT length: 39.111 ms.
Best time for 512K FFT length: 44.016 ms.
Best time for 640K FFT length: 54.876 ms.
Best time for 768K FFT length: 66.955 ms.
Best time for 896K FFT length: 80.955 ms.
Best time for 1024K FFT length: 91.234 ms.
Best time for 1280K FFT length: 122.678 ms.
Best time for 1536K FFT length: 150.378 ms.
Best time for 1792K FFT length: 179.897 ms.
Best time for 2048K FFT length: 202.724 ms.
Best time for 2560K FFT length: 259.869 ms.
Best time for 3072K FFT length: 322.595 ms.
Best time for 3584K FFT length: 390.152 ms.
Best time for 4096K FFT length: 438.155 ms.

Xyzzy · 2003-12-21, 02:31

Original 2.4 timings...

Code:

AMD Opteron(tm) Processor 140
CPU speed: 1395.79 MHz
CPU features: RDTSC, CMOV, PREFETCH, MMX, SSE
L1 cache size: 64 KB
L2 cache size: 1024 KB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
L1 TLBS: 32
L2 TLBS: 512
Prime95 version 23.5, RdtscTiming=1
Best time for 384K FFT length: 36.556 ms.
Best time for 448K FFT length: 41.414 ms.
Best time for 512K FFT length: 45.015 ms.
Best time for 640K FFT length: 60.950 ms.
Best time for 768K FFT length: 72.274 ms.
Best time for 896K FFT length: 87.880 ms.
Best time for 1024K FFT length: 96.652 ms.
Best time for 1280K FFT length: 124.407 ms.
Best time for 1536K FFT length: 150.931 ms.
Best time for 1792K FFT length: 180.347 ms.
Best time for 2048K FFT length: 201.765 ms.
Best time for 2560K FFT length: 265.804 ms.
Best time for 3072K FFT length: 319.510 ms.
Best time for 3584K FFT length: 385.544 ms.
Best time for 4096K FFT length: 430.639 ms.

Xyzzy · 2003-12-29, 23:26

I finally got all my stuff moved to the new mersenneforum.org headquarters... Hopefully this new place is quieter than the last place I was... The Opteron is the black box on the right with the keyboard on top...

PrimeCruncher · 2003-12-30, 00:00

Hmm, I see two things with this picture that I feel a need to comment on

1. Is that a Compaq next to those two black boxen? I hate Comcraps. There was actually a site www.comcrap.com where Comcrap owners got together to complain about them. I have one, which will soon be stripped and its components reused.

2. Is that an HP LaserJet 1200 I see next to the Comcrap? I've worked with HP LaserJets before. Niiice piece of engineering. VERY fast too.

Dresdenboy · 2003-12-30, 00:33

Quote:

Originally posted by Xyzzy
Original 2.4 timings...

Code:

AMD Opteron(tm) Processor 140 CPU speed: 1395.79 MHz CPU features: RDTSC, CMOV, PREFETCH, MMX, SSE

BTW that were the results of the non-SSE2 run

Xyzzy · 2003-12-30, 03:07

Quote:

1. Is that a Compaq next to those two black boxen?

Nope, it is my Mom's Gateway...

Quote:

2. Is that an HP LaserJet 1200 I see next to the Comcrap?

Yes, it is a 1200SE with 72MB of RAM...

Xyzzy · 2003-12-30, 03:11

Quote:

Originally posted by Dresdenboy
BTW that were the results of the non-SSE2 run

Oops!

Code:

AMD Opteron(tm) Processor 140
CPU speed: 1396.27 MHz
CPU features: RDTSC, CMOV, PREFETCH, MMX, SSE, SSE2
L1 cache size: 64 KB
L2 cache size: 1024 KB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
L1 TLBS: 32
L2 TLBS: 512
Prime95 version 23.5, RdtscTiming=1
Best time for 384K FFT length: 32.580 ms.
Best time for 448K FFT length: 38.982 ms.
Best time for 512K FFT length: 44.032 ms.
Best time for 640K FFT length: 54.950 ms.
Best time for 768K FFT length: 67.080 ms.
Best time for 896K FFT length: 80.850 ms.
Best time for 1024K FFT length: 91.239 ms.
Best time for 1280K FFT length: 121.982 ms.
Best time for 1536K FFT length: 149.322 ms.
Best time for 1792K FFT length: 178.736 ms.
Best time for 2048K FFT length: 201.266 ms.
Best time for 2560K FFT length: 258.219 ms.
Best time for 3072K FFT length: 320.238 ms.
Best time for 3584K FFT length: 386.979 ms.
Best time for 4096K FFT length: 434.977 ms.

Xyzzy · 2004-01-09, 17:29

I snagged a deal on a 40GB 7200RPM Maxtor last night ($50) so we now have two hard drives online... I made the new one the web root so now we have lots of room to store data files...

Code:

opteron:~ # df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/hda2              37G   11G   26G  31% /
/dev/hdb1              37G  268M   35G   1% /srv

This purchase leaves us with $84.01 left in the Opteron fund...

Xyzzy · 2004-01-09, 20:57

[pre]Linux opteron 2.6.1 #2 Fri Jan 9 22:08:39 EST 2004 x86_64 unknown unknown GNU/Linux[/pre]

Xyzzy · 2004-01-10, 03:37

Code:

Mersenne PrimeNet Server 4.0 (Build 4.0.031)
Individual Account Report 10 Jan 2004 03:16 (Jan  9 2004  8:16PM Pacific)
 
All dates and times are Coordinated Universal Time (UTC)
 
EFF.org Research Discovery Prize is US $100,000 for first 10 million-digit prime
 
Account ID      LL P90*  Exponents  Fact.P90  Exponents  P90 CPU
                CPU yrs  LL Tested  CPU yrs*  w/ Factor  hrs/day
--------------  -------  ---------  --------  ---------  -------
TeamOpteron      11.737        5       0.004        0     809.83
 
Contact name   :
Contact e-mail : w@w
Receive e-mail : YES
Last activity  : 09 Jan 2004 23:37 UTC
Account created: 04 Sep 2003 15:33 UTC
 
 
 
  ------- Machines Assigned to PrimeNet -------
 
AMD Athlon            :      1
---------------------- -------
TOTAL, uniquely named :      1
 
 
 
  ------- Exponents Assigned -------
 
Assignment overdue check-in is set at 60.0 days (0.0 days to expire)
 
 prime      fact  current         days
exponent    bits iteration  run / to go / exp   date updated     date assigned   computer ID  Mhz  Ver
-------- -- ---- ---------  -----------------  ---------------  ---------------  ------------ ---- ---
21963971  *  60               7.3  31.8  60.8  09-Jan-04 21:02  02-Jan-04 19:06  Opteron-140  1396 v19/v20
 
Lucas-Lehmer testing  :      1
Factoring only        :      0
Double-checking LL    :      0
---------------------- -------
                TOTAL :      1
 
 
 
  ------- Exponents Cleared since last Synchronization -------
 
 prime   fact    Lucas-Lehmer residue or factor
exponent bits    [residues partially masked]        date returned   computer ID
-------- ---- -- --------------------------------  ---------------  ------------
19078159  67     0x6A3F2C8166F3FB__                18-Nov-03 01:37  Opteron-140
19474769  67     0xE66DA6EFE1EA42__                27-Sep-03 22:38  Opteron-140
19532131  67     0x64A946737DEAC1__                09-Jan-04 23:37  Opteron-140
20643683  67     0x06ACC448F13ED5__                28-Oct-03 06:45  Opteron-140
21167009  67     0xA629D7D7993C2E__                19-Dec-03 12:09  Opteron-140
 
Factored composite    :      0
Lucas-Lehmer composite:      5
Double-checked LL     :      0
---------------------- -------
                TOTAL :      5
 
 
 
*P90 CPU time according to Woltman/Kurowski formulation. Calibrated by
benchmark P5 90Mhz, 32.98 MFLOP units: 25658999 FLOP/0.778s (256k FFT).
 
(c)1997-2004 Entropia.com

GP2 · 2004-01-11, 01:41

Quote:

Originally posted by Xyzzy

Code:

------- Machines Assigned to PrimeNet ------- AMD Athlon : 1 ---------------------- ------- TOTAL, uniquely named : 1

It would really be great if the next version of the client distinguished ordinary Athlons from Athlon 64s.

http://opteron.mersenneforum.org/png/machines.png

SalemTheCat100 · 2004-01-24, 15:06

I have a dual Opteron system with (2) Opteron 242's. The latest Prime95 client running on Windows 2000 is disappointing.

The Opterons running at 1.6ghz with SSE2 is running at 1/2 the speed of a Pentium 4 at 2.4ghz. 110ms (Opteron) vs 55ms (P4) per iteration.

Is there ANY PROGRESS in getting the bottleneck problem SOLVED?

Is there any work being done on a 64 bit client?

Salem

PrimeCruncher · 2004-01-24, 15:46

There IS work being done, and I think the problem was identified in some other thread. Any progress, George?

Xyzzy · 2004-01-24, 18:48

Quote:

Originally Posted by SalemTheCat100

The Opterons running at 1.6ghz with SSE2 is running at 1/2 the speed of a Pentium 4 at 2.4ghz. 110ms (Opteron) vs 55ms (P4) per iteration.

IMO, to be fair, you have to compare your Opterons to P4s that are rated at the same speed... How fast does a 1.6GHz P4 benchmark?

Angular · 2004-02-03, 17:14

Quote:

Originally Posted by Xyzzy

IMO, to be fair, you have to compare your Opterons to P4s that are rated at the same speed... How fast does a 1.6GHz P4 benchmark?

Here is a P4 1.6 GHz from the benchmark tread: <http://www.mersenneforum.org/showthread.php?t=59&page=1>
Intel(R) Pentium(R) 4 CPU 1.70GHz
CPU speed: 1694.64 MHz
CPU features: RDTSC, CMOV, PREFETCH, MMX, SSE, SSE2
L1 cache size: 8 KB
L2 cache size: 256 KB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
TLBS: 64
Prime95 version 22.12, RdtscTiming=1
Best time for 256K FFT length: 17.666 ms.
Best time for 320K FFT length: 22.392 ms.
Best time for 384K FFT length: 26.849 ms.
Best time for 448K FFT length: 32.042 ms.
Best time for 512K FFT length: 36.454 ms.
Best time for 640K FFT length: 47.836 ms.
Best time for 768K FFT length: 57.960 ms.
Best time for 896K FFT length: 72.895 ms.
Best time for 1024K FFT length: 81.147 ms.
Best time for 1280K FFT length: 108.953 ms.
Best time for 1536K FFT length: 138.918 ms.
Best time for 1792K FFT length: 183.443 ms.

For easy reference purposes here is the 1.8GHz Opteron from earlier in the thread:

AMD Engineering Sample
CPU speed: 1799.79 MHz
CPU features: RDTSC, CMOV, PREFETCH, MMX, SSE, SSE2
L1 cache size: 64 KB
L2 cache size: 1024 KB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
L1 TLBS: 32
L2 TLBS: 512
Prime95 version 22.12, RdtscTiming=1
Best time for 256K FFT length: 16.347 ms.
Best time for 320K FFT length: 21.512 ms.
Best time for 384K FFT length: 25.947 ms.
Best time for 448K FFT length: 31.366 ms.
Best time for 512K FFT length: 34.787 ms.
Best time for 640K FFT length: 46.058 ms.
Best time for 768K FFT length: 56.882 ms.
Best time for 896K FFT length: 69.160 ms.
Best time for 1024K FFT length: 76.882 ms.
Best time for 1280K FFT length: 98.280 ms.
Best time for 1536K FFT length: 118.428 ms.
Best time for 1792K FFT length: 145.785 ms.

These are the closest two benchmarks I found, but it looks like the Opteron smokes the P4 per clock cycle. But more importantly which offers the most bang for the buck? Currently there is no competition the P4 wins hands down.

Xyzzy · 2004-02-04, 06:47

[pre]Linux opteron 2.6.2 #1 Wed Feb 4 01:34:31 EST 2004 x86_64 unknown unknown GNU/Linux[/pre]

QuintLeo · 2004-02-05, 07:28

Quote:

Originally Posted by Angular

Here is a P4 1.6 GHz from the benchmark tread:
.

More like a P4-1.7, but still pretty close.

Looks like a more-or-less dead heat untill you get up to 1.5Meg FFT range, then the Opteron starts pulling away. And at 1.7Meg (30-million-digit territory), the Opteron is a lot faster per clock.

Down side - it's NOT 1.5x times faster, while P4's are available a LOT faster than 1.5x the fastest Opteron right now.

I do wonder how the Opteron compares on Trial Factoring against a P4, though....

PrimeCruncher · 2004-02-06, 00:07

Quote:

Originally Posted by QuintLeo

I do wonder how the Opteron compares on Trial Factoring against a P4, though....

I'm also curious. Anyone have some benchmarks?

Xyzzy · 2004-02-06, 16:50

Some interesting developments:

I've backed the Opteron up, and transferred all of the scripts it ran to another Linux box, and I have installed a copy of 64-bit Windows... Microsoft is offering a free trial of this software...

So for the next few weeks, as a test, we'll be running 64-bit Windows...

What I need is for all the people who were doing development and testing to do is connect to this box using "remote desktop"... I think if you have a copy of XP on your machine you can graphically connect into the box here...

If you are interested in doing this, please email/pm me for details...

Comments are appreciated...

2003-12-29, 23:26	#234
Xyzzy "Mike" Aug 2002 5·17·97 Posts	I finally got all my stuff moved to the new mersenneforum.org headquarters... Hopefully this new place is quieter than the last place I was... The Opteron is the black box on the right with the keyboard on top... Attached Thumbnails

2004-01-24, 15:06	#243
SalemTheCat100 Oct 2002 2×13 Posts	Disappointing Opteron 32-bit performance I have a dual Opteron system with (2) Opteron 242's. The latest Prime95 client running on Windows 2000 is disappointing. The Opterons running at 1.6ghz with SSE2 is running at 1/2 the speed of a Pentium 4 at 2.4ghz. 110ms (Opteron) vs 55ms (P4) per iteration. Is there ANY PROGRESS in getting the bottleneck problem SOLVED? Is there any work being done on a 64 bit client? Salem

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2003-12-21, 02:16	#231
Xyzzy "Mike" Aug 2002 5×17×97 Posts	I'm working on it... Is the value 1/x? For example, 1s / 1000 = 1ms timeslice therefore 1s / 100 = 10ms timeslice?

2003-12-30, 00:00	#235
PrimeCruncher Sep 2003 Borg HQ, Delta Quadrant 1010111110₂ Posts	Hmm, I see two things with this picture that I feel a need to comment on 1. Is that a Compaq next to those two black boxen? I hate Comcraps. There was actually a site www.comcrap.com where Comcrap owners got together to complain about them. I have one, which will soon be stripped and its components reused. 2. Is that an HP LaserJet 1200 I see next to the Comcrap? I've worked with HP LaserJets before. Niiice piece of engineering. VERY fast too.

2004-01-09, 17:29	#239
Xyzzy "Mike" Aug 2002 2035₁₆ Posts	I snagged a deal on a 40GB 7200RPM Maxtor last night ($50) so we now have two hard drives online... I made the new one the web root so now we have lots of room to store data files... Code: opteron:~ # df -h Filesystem Size Used Avail Use% Mounted on /dev/hda2 37G 11G 26G 31% / /dev/hdb1 37G 268M 35G 1% /srv This purchase leaves us with $84.01 left in the Opteron fund...

2004-01-09, 20:57	#240
Xyzzy "Mike" Aug 2002 20065₈ Posts	[pre]Linux opteron 2.6.1 #2 Fri Jan 9 22:08:39 EST 2004 x86_64 unknown unknown GNU/Linux[/pre]

2004-01-24, 15:46	#244
PrimeCruncher Sep 2003 Borg HQ, Delta Quadrant 2·3³·13 Posts	There IS work being done, and I think the problem was identified in some other thread. Any progress, George?

2004-02-04, 06:47	#247
Xyzzy "Mike" Aug 2002 20065₈ Posts	[pre]Linux opteron 2.6.2 #1 Wed Feb 4 01:34:31 EST 2004 x86_64 unknown unknown GNU/Linux[/pre]

2004-02-06, 16:50	#250
Xyzzy "Mike" Aug 2002 8245₁₀ Posts	Some interesting developments: I've backed the Opteron up, and transferred all of the scripts it ran to another Linux box, and I have installed a copy of 64-bit Windows... Microsoft is offering a free trial of this software... So for the next few weeks, as a test, we'll be running 64-bit Windows... What I need is for all the people who were doing development and testing to do is connect to this box using "remote desktop"... I think if you have a copy of XP on your machine you can graphically connect into the box here... If you are interested in doing this, please email/pm me for details... Comments are appreciated...