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#23 |
Nov 2002
Anchorage, AK
3×7×17 Posts |
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Another benchmark for a Pentium-M 1.4 GHz (Centrino) from a Compaq Presario X1000 laptop.
Intel(R) Pentium(R) M processor 1400MHz CPU speed: 598.04 MHz CPU features: RDTSC, CMOV, PREFETCH, MMX, SSE, SSE2 L1 cache size: 32 KB L2 cache size: 1024 KB L1 cache line size: 64 bytes L2 cache line size: 64 bytes TLBS: 128 Prime95 version 23.6, RdtscTiming=1 Best time for 384K FFT length: 42.841 ms. Best time for 448K FFT length: 51.516 ms. Best time for 512K FFT length: 57.944 ms. Best time for 640K FFT length: 74.285 ms. Best time for 768K FFT length: 90.659 ms. Best time for 896K FFT length: 107.811 ms. Best time for 1024K FFT length: 120.382 ms. Best time for 1280K FFT length: 153.983 ms. Best time for 1536K FFT length: 186.577 ms. Best time for 1792K FFT length: 221.972 ms. Best time for 2048K FFT length: 253.494 ms. |
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#24 |
Aug 2003
Upstate NY, USA
1010001102 Posts |
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I had a similar problem with my laptop at first:
My default power scheme had the laptop processor running at "Medium" which produced numbers like: [code:1]Intel(R) Pentium(R) 4 Mobile CPU 1.80GHz CPU speed: 1196.13 MHz CPU features: RDTSC, CMOV, PREFETCH, MMX, SSE, SSE2 L1 cache size: 8 KB L2 cache size: 512 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: 21.5 ms. Best time for 320K FFT length: 27.9 ms. Best time for 384K FFT length: 34.4 ms. Best time for 448K FFT length: 41.8 ms. Best time for 512K FFT length: 46.8 ms. Best time for 640K FFT length: 61.2 ms. Best time for 768K FFT length: 74.4 ms. Best time for 896K FFT length: 93.7 ms. Best time for 1024K FFT length: 96.4 ms. Best time for 1280K FFT length: 142.9 ms. Best time for 1536K FFT length: 177.6 ms. Best time for 1792K FFT length: 219.2 ms.[/code:1] Then I entered my "Battery MaxiMiser Wizard" and created my own power setting where my CPU runs at Maximum, producing numbers such as: [code:1]Intel(R) Pentium(R) 4 Mobile CPU 1.80GHz CPU speed: 1794.07 MHz CPU features: RDTSC, CMOV, PREFETCH, MMX, SSE, SSE2 L1 cache size: 8 KB L2 cache size: 512 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: 14.4 ms. Best time for 320K FFT length: 19.6 ms. Best time for 384K FFT length: 23.4 ms. Best time for 448K FFT length: 27.7 ms. Best time for 512K FFT length: 31.9 ms. Best time for 640K FFT length: 40.3 ms. Best time for 768K FFT length: 50.7 ms. Best time for 896K FFT length: 64.9 ms. Best time for 1024K FFT length: 67.0 ms. Best time for 1280K FFT length: 96.9 ms. Best time for 1536K FFT length: 121.8 ms. Best time for 1792K FFT length: 152.1 ms.[/code:1] Hope this helps. Also, on my IBM T30, you enter the Wizard by double-clicking on the Green bar that says what percentage of power your battery has. Lemme know if this works for anyone. -Tom |
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#25 |
Sep 2003
916 Posts |
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The low Banias timings are a direct result of the chip having SSE2 latencies about 1.5x->2x slower than an equivalent P4. Likewise, the P4 added significant latencies to many regular fpu instructions to make space for better SSE2 latencies. Banias is designed more for office-style applications, and less for heavy scientific (and gaming) work. The actual slowdown is lower clock frequency * higher latencies. The better IPC really only effects the alu's and fpu.[/i]
Another thing to note is that the heavy use of prefetch instructions basically negates the advantage of having a larger cache on the Banias. I won't get into the details, but that explains why the pitiful Celeron4 gets decent scores in Prime95. |
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#26 |
Nov 2002
Anchorage, AK
3×7×17 Posts |
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Hello tom11784,
I noticed your laptop processor may not be the Centrino processor we are talking about (take a look at your L2 cache). I believe the new Centrino (Pentium-M's) have an L2 cache of 1024K. I had all power savings software disabled when I ran the benchmarks. Hopefully at some point this will be fixed. |
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#27 |
Aug 2003
Upstate NY, USA
32610 Posts |
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I know it isn't a Centrino, but I figured if I missed it, even though I'm no genius or anything, that perhaps someone else missed it when they received their new laptop.
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#28 |
Nov 2002
Anchorage, AK
3×7×17 Posts |
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Here is a 1GHz Centrino benchmark with 23.7
Intel(R) Pentium(R) M processor 1000MHz CPU speed: 1000.01 MHz CPU features: RDTSC, CMOV, PREFETCH, MMX, SSE, SSE2 L1 cache size: 32 KB L2 cache size: 1024 KB L1 cache line size: 64 bytes L2 cache line size: 64 bytes TLBS: 128 Prime95 version 23.7, RdtscTiming=1 Best time for 384K FFT length: 58.234 ms. Best time for 448K FFT length: 71.127 ms. Best time for 512K FFT length: 79.206 ms. Best time for 640K FFT length: 102.371 ms. Best time for 768K FFT length: 125.058 ms. Best time for 896K FFT length: 144.915 ms. Best time for 1024K FFT length: 165.598 ms. Best time for 1280K FFT length: 212.396 ms. Best time for 1536K FFT length: 253.581 ms. Best time for 1792K FFT length: 324.428 ms. Best time for 2048K FFT length: 344.232 ms. |
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#29 |
Nov 2002
Anchorage, AK
1011001012 Posts |
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I know George is probably busy working on the Opteron/Athlon 64 tweaks of Prime95, but just want to see what kind of computer access George would need to get the performance of the Centrinos up to the Pentium 4. I suppose I may be able to provide access to a Centrino machine, depending on what kind of access George would need.
Thanks, |
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#30 |
Nov 2003
7 Posts |
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If anyone wants, I can run any pre-complied source (or if you can teach me how to complie the stuff (and tell me where to get free stuff to use)) on my Centrino laptop.
I can't give a remote desktop, because other people use this computer heavily, and they might notice. Whatever would help you the best is fine with me, but I am a coding n00b (except in JAVA, but that does not apply here) you can reach me at: magicfan241 at netscape dot net or on the Ars forums, in the DCA. magicfan241 |
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#31 | |
Apr 2003
Berlin, Germany
16916 Posts |
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And right before sending this post I remembered another test which you could run. It measures the speed of reading from cache (mail is sent). |
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#32 |
Nov 2003
78 Posts |
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here are the results to one program you sent me.
CPU features:a7e9f9bf Unit Latency Throghput ALU 1.01 0.52 IMUL 4.00 1.00 ISHIFT 1.00 1.00 ISHIFT(NetBurst Opt.) 1.01 1.00 x87 ADD 3.00 1.05 x87 MUL 5.00 2.02 MMX ADD 1.01 0.51 MMX MUL 3.00 1.05 SSE Scalar SP ADD 3.00 1.05 SSE Packed SP ADD 3.01 2.05 SSE Scalar SP MUL 4.00 1.01 SSE Packed SP MUL 4.00 2.01 SSE2 Scalar DP ADD 3.00 1.04 SSE2 Packed DP ADD 3.01 2.05 SSE2 Scalar DP MUL 5.00 2.00 SSE2 Packed DP MUL 5.00 4.01 SSE2 Packed INT ADD 1.18 2.01 SSE2 Packed INT MUL 3.01 2.05 I clicked run, and waited for my activity light to stop blinking, and found this file, creativly called results.txt Hope this helps magicfan241 |
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#33 |
Nov 2003
1112 Posts |
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here are the resluts to the second program you sent me:
Running MMX/SSE/SSE2 reading speed tests... a7e9f9bf Time for reading 128kB from cache using MOVQ: 28676 cycles (4.57 Bytes/cycle) Time for reading 8kB from cache using MOVQ: 1076 cycles (7.61 Bytes/cycle) Time for reading 128kB from cache using MOVAPD: 28676 cycles (4.57 Bytes/cycle) Time for reading 8kB from cache using MOVAPD: 1076 cycles (7.61 Bytes/cycle) Time for reading 128kB from cache using MOVDQA: 28676 cycles (4.57 Bytes/cycle) Time for reading 8kB from cache using MOVDQA: 1075 cycles (7.62 Bytes/cycle) Time for reading 128kB from cache using MOVAPS: 28672 cycles (4.57 Bytes/cycle) Time for reading 8kB from cache using MOVAPS: 1079 cycles (7.59 Bytes/cycle) magicfan241 |
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