As Dan said, it looks like ZFS is busy.
How much RAM is on this system?
What release of Solaris?
Do you have any ZFS tweaks in /etc/system?
(like clamping the ARC size...)
Is the system memory constrained?
The xcalls are due to the page unmaps out of
what I'm assuming is the ZFS ARC (although
I'm not 100% sure about that - I need to check
the source for segkmem_zio_free())
Can you gather some ZFS IO statistics, like
"fsstat zfs 1" for a minute or so.
Thanks,
/jim
Jim Leonard wrote:
Thanks for the awesome two-liner, I'd been struggling with 1-second intervals
without a full-blown script.
I modified it to output walltime so that I could zoom in on the problem, and
here it is:
unix`xc_do_call+0x8f
unix`xc_wait_sync+0x36
unix`x86pte_invalidate_pfn+0x135
unix`hat_pte_unmap+0xa9
unix`hat_unload_callback+0x109
unix`hat_unload+0x2a
unix`segkmem_free_vn+0x82
unix`segkmem_zio_free+0x10
genunix`vmem_xfree+0xee
genunix`vmem_free+0x28
genunix`kmem_slab_destroy+0x80
genunix`kmem_slab_free+0x1be
genunix`kmem_magazine_destroy+0x54
genunix`kmem_depot_ws_reap+0x4d
genunix`taskq_thread+0xbc
unix`thread_start+0x8
418560
Any ideas?
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