Date: Fri, 27 May 2005 08:54:45 -0500 From: Jacob S <stormspotter@6Texans.net> To: freebsd-questions@freebsd.org Subject: Problem with HT support in 5.4 Message-ID: <20050527085445.38de5553@jacob.6texans.net>
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Hello list, I upgraded a few 5.3 servers to 5.4 yesterday and everything seemed to go well. After booting the new kernel, dmesg correctly showed 2 logical cpus (1 xeon with HT). However, when I look at top's output, it always shows at least 50% cpu idle time - even when the load is above 10. To confirm this, I ran burnP6 from the cpuburn port - even with over a hundred apache processes going, exim running and a few other things, top still reported the cpu as 50% idle. The 'C' column in top, between 'State' and 'Time' also shows everything as being run on cpu 0. `ps ax | grep cpu` reports this: 11 ?? RL 0:00.00 [idle: cpu1] 12 ?? RL 931:45.24 [idle: cpu0] 108 ?? DL 0:04.02 [schedcpu] So it looks like smp support is enabled and it sees the HT enabled processor, but it's not using the second logical cpu. Is there something I missed in compiling the kernel, or is this a bug? I have confirmed it on two 5.4 servers now. TIA, Jacob
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