Messages in this thread | | | Date | Mon, 24 May 2004 00:53:31 -0700 | From | Andrew Morton <> | Subject | Re: Help understanding slow down |
| |
Phy Prabab <phyprabab@yahoo.com> wrote: > > Okay, here is the output: > > 317955 total > 0.1302 > 263633 poll_idle > 4545.3966 > 6764 do_page_fault > 5.1951 > 3650 kmap_atomic
It's strange that you appear to be using poll_idle(). Maybe it's an error in the profiler - it sometimes makes mistakes in identifying small functions.
But if you _are_ using poll_idle() and if your CPU is hyperthreaded then yes, one "CPU" is going to take a performance hit from the "idle" one.
Is your CPU hyperthreaded? (cat /proc/cpuinfo)
Are you booting with "idle=poll"? Do `dmesg -s 1000000 | grep idle'.
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |