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Ati radeon hd 5450 vs intel gma x450011/10/2022 ![]() Ubuntu10.04LTS 2.6.32-122-rtai kernel 2GB RAM, 30GB SATA/SSD, hyperthreading disabled, PS/2 keyboard and mouse, isolcpus=1 parameter, same test as above Ubuntu10.04LTS 2.6.32-122-rtai kernel 2GB RAM, 30GB SATA/SSD, hyperthreading disabled, PS/2 keyboard and mouse, no isolcpus parameter, test ran 15m with 2Xglxgears, web surfing, taking directory listing of external USB HD, playing movie from external HD in VLC Multiple YouTube ? videos, glxgears, file operations, etc for approx 20 min Measured 33 Watts total power draw by Mini-ITX computer running LinuxCNCĪMD A4-4000 Dual Core 3.2GHZ Max Turbo, 3.0 GHZ Base,ġ0.04, All Power saving features disabled in BIOS, Bios updated to VER 2.40, ISOLCPUS Enabled, IRQBalance un-installed, Disabled/Turned ? Off spread spectrum, turbo core, APM, C6, cool'n'quiet, SVM, cpu throttle, suspend to RAMĪMD Dual-Core Zacate E350/E350D APU 1.6GHzġ2.04, 3.4.55 RTAI, All power management disabled in BIOS, Disabled Spread Spectrum, Turbo Core, APM, C6, Cool'n'quiet, SVM, Cpu Throttle, Suspend to RAM, Kernel options "isolcpus=1 acpi_irq_nobalance noirqbalance", Upstart script "nf" to /etc/initġ2.04, 3.4.9 RTAI, default BIOS, default kernel options. Intel 910GMLE Video Card, 1g RAM, Mesa 4i65, Award BIOSĤGB Ram + Booted from 8.04 LiveCD + 10*Glxgears + 1hourĤGB Ram, isolcpus=1, C1E/C3/C6 suspend states disabled in BIOS, ATI Radeon 2400HD w/ "radeon" driver.ĪTI Radeon 9200 Pro (256 MB) PCI card. That performed about twice as good as no "cpu hogs", but it performed best as shown here with one CPU maxed out. Also tested with no CPUs isolated, but running four "cpu hogs". VESA driver.ĤGB RAM, Ubuntu 10.04 LTS, EIST off, C1E off, Spread Spectrum off, Disable Audio and network support, On-board video, Running GLXGEARS and reading PDFsĤGB Ram, Radeon HD 7350, Seagate Barracuda 1TB 7200rpm, Ubuntu 12.04.4 LTS, GRUB 1.99-21ubuntu3.14, "isolcpus=1,2,3", with "cpu hog" running, 3 GLXGEARS, surfing web, listening to music, system monitor running, and making this entry. VESA driver.ĪTI Radeon RV100 QY (VE/7000) AGP Card. If you are going to use software stepping, then read this:ĤGB Ram, onboard display, 500gb SSD, LiveCD ?, "isolcpus=2,3", with "cpu hog" running, 2 GLXGEARS, disabled= Core performacnce boost, turbo performance boost, cool& quite, SVM Mode, C6 ModeĪTI 3D Rage IIC AGP Card. What can be done about improving latency? See these pages: Numbers over 1 millisecond (1,000,000 nanoseconds) mean the PC is not a good candidate for LinuxCNC, regardless of whether you use software stepping or not. If the numbers are 100 uS or more (100,000 nanoseconds), then the PC is not a good candidate for software stepping. If the Max Jitter is more like 30-50 microseconds, you can still get good results, but your maximum step rate might be a little disappointing, especially if you use microstepping or have very fine pitch leadscrews. So, what do the results mean? If your "Max Jitter" number is less than about 15-20 microseconds (15000-20000 nanoseconds), the computer should give very nice results with software stepping. ![]() ![]() If you want to add information to this page or add a new page, follow some BasicSteps. Results may vary by 1000 ns from one invocation to another (e.g., by a few microseconds). Note that the numbers reported in this test are extremely precise but not necessarily extremely reproducible. If you have a multi-cpu machine, it is helpful to report results with the isolcpus boot parameter set appropriately (see elsewhere in this wiki). Move around windows, surf the web, copy files, play music etc. Let the test run for at least 15 minutes (it has been suggested that the longer the better let it run for a day or overnight for instance) while you run glxgears or a similar application to stress the cpu. Latency-test comes with LinuxCNC, you can run it with 'latency-test' from the prompt. ![]()
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