On 2012/07/01 00:27, JD wrote:
On 07/01/2012 12:39 AM, jdow wrote:On 2012/06/30 20:55, JD wrote:On 06/30/2012 08:17 PM, Tom Horsley wrote:Every time I start firefox after recent updates, top shows it periodically taking up to 50% of the CPU even if I'm just looking at a simple page of plain html (no scripts, not even any images) on my local web server. This is ff 13.0.1 on x86_64 fedora 17. Any clues? Anyone see anything similar?50% !!!??? Huh.... consider yourself LUCKY! On my old unicore amd64 (3.7GHz "equivalent :) :) /smirk/) it escalates sometimes to 95% of cpu.top tends to be confusing that way. Note this line from my machine at a time it said FF was at 87.8%: Cpu(s): 13.6%us, 33.7%sy, 0.0%ni, 52.5%id, 0.0%wa, 0.0%hi, 0.2%si, 0.0%st That was really 87.4% of the 13.6% user time that was consumed. {^_^}in <kernel source>/include/linux/taskstats.h The comment reads: /* cpu "virtual" running time * Uses time intervals seen by the kernel i.e. no adjustment * for kernel's involuntary waits due to virtualization. * Value is cumulative, in nanoseconds, without a corresponding count * and wraps around to zero silently on overflow */
Hm, please define virtualization in this context. I am running a flat
SL6.2 system with no virtual machine in the box at all.
Note that you get 100% if you add up all the values on that line.
There is no way you can get 87.4% cpu usage out of those numbers
without claiming some of the idle time is used by firefox without
attribution.
{^_^}
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