stryder Posted August 31, 2005 Share Posted August 31, 2005 I'm curious how OS X reports HyperThreading. I've never really heard much about it until the whole Apple/Intel alliance in June... How does OS X show that you have HyperThreading? Does it show an extra "cpu" in the activity monitor? Is the machine noticeably faster vs. similar hardware without it? Anyone running this beast on a Dual Core Intel P4? How does it show up there? Inquiring minds want to know... Link to comment Share on other sites More sharing options...
opiniatre Posted August 31, 2005 Share Posted August 31, 2005 It's displaying "two" cpu for hyperthreading ... look a bit like windows ... Link to comment Share on other sites More sharing options...
jtle Posted August 31, 2005 Share Posted August 31, 2005 As for dual core, it displays 2 CPU's in Activity Monitor but only says one CPU in System Profiler. Link to comment Share on other sites More sharing options...
briankoenig03 Posted August 31, 2005 Share Posted August 31, 2005 How did you enable hyperthreading? My P4 SSE3 has Hyperthreading enabled in the BIOS, but it shows up as "disabled" in "About This Mac" and the Activity Monitor only shows 1 CPU. Link to comment Share on other sites More sharing options...
jimbospoon Posted August 31, 2005 Share Posted August 31, 2005 i haven't done anything to mine and activity monitor shows 2 processor graphs. just like windows does. i have the sse2 patch installed but that's pretty much all i have done. Link to comment Share on other sites More sharing options...
Mao Posted August 31, 2005 Share Posted August 31, 2005 i haven't done anything to mine and activity monitor shows 2 processor graphs. just like windows does. i have the sse2 patch installed but that's pretty much all i have done. <{POST_SNAPBACK}> Same with me. Link to comment Share on other sites More sharing options...
JaS Posted August 31, 2005 Share Posted August 31, 2005 At the boot prompt put in PLATFORM=ACPI that enables HTT for osx i noticed that if i do PLATFORM=X86PC HTT is disabled.although it should come up,Try the forced booting method Did you install from the dvd or use the image and dd it to your hard disk? Link to comment Share on other sites More sharing options...
briankoenig Posted August 31, 2005 Share Posted August 31, 2005 I dd'd the image to the disk. I will try ACPI next time I get a chance, although I was under the impression that all ACPI did was regulate power for notebooks/portables. Link to comment Share on other sites More sharing options...
cyrana Posted August 31, 2005 Share Posted August 31, 2005 This is true, the ACPI flag. However, supposedly OS X is faster (in xbench) anyway with HT disabled... Does anyone have a dual core? I'm curious if its possible to run xbench and only utilise half the core (disable SMP or whatever) and see if it runs faster...or if it just a HT problem with OS X currently. Link to comment Share on other sites More sharing options...
JaS Posted September 1, 2005 Share Posted September 1, 2005 This is true, the ACPI flag. However, supposedly OS X is faster (in xbench) anyway with HT disabled... Does anyone have a dual core? I'm curious if its possible to run xbench and only utilise half the core (disable SMP or whatever) and see if it runs faster...or if it just a HT problem with OS X currently. <{POST_SNAPBACK}> i will test it with and without htt for you and post the scores Link to comment Share on other sites More sharing options...
flaker Posted September 1, 2005 Share Posted September 1, 2005 Hmm, on my machine, I tested 2 cpus.. P4 551 & 640... 551 doesn't show anything on System Preferences tap, once I changed it to 640, an icon is showed, and it can be loaded on taskbar... and I can enable/disable HyperThreading.... It's only available for 640... Link to comment Share on other sites More sharing options...
briankoenig Posted September 1, 2005 Share Posted September 1, 2005 Can you do a quick screengrab of where the icon appears? Thanks! Link to comment Share on other sites More sharing options...
flaker Posted September 2, 2005 Share Posted September 2, 2005 Can you do a quick screengrab of where the icon appears? Thanks! <{POST_SNAPBACK}> Here is my screen shot... http://img398.imageshack.us/my.php?image=osx861ow.jpg Link to comment Share on other sites More sharing options...
DeathChill Posted September 2, 2005 Share Posted September 2, 2005 Hmm, on my machine, I tested 2 cpus.. P4 551 & 640...551 doesn't show anything on System Preferences tap, once I changed it to 640, an icon is showed, and it can be loaded on taskbar... and I can enable/disable HyperThreading.... It's only available for 640... <{POST_SNAPBACK}> P4 560 Link to comment Share on other sites More sharing options...
flatlyna Posted September 2, 2005 Share Posted September 2, 2005 P4 560 <{POST_SNAPBACK}> That icon appears if you install the developer stuff, specifically the CHUD tools. Link to comment Share on other sites More sharing options...
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