Re: mmap over nfs leads to excessive system load

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



--- Trond Myklebust <[email protected]> wrote:
> 
> Is this NFSv2?
> 
> Cheers,
>   Trond
> 
This is reproducible with O_DIRECT, but not without.

The profile looks the same:
samples  %        symbol name
647042   28.4114  zap_pte_range
572195   25.1249  unmap_mapping_range
324291   14.2395  _spin_lock
139259    6.1148  __bitmap_weight
137048    6.0177  zap_page_range
104614    4.5936  unmap_mapping_range_vma
63406     2.7841  debug_smp_processor_id
48906     2.1474  sub_preempt_count
46090     2.0238  unmap_vmas
27966     1.2280  add_preempt_count
23224     1.0198  invalidate_inode_pages2_range
21676     0.9518  unmap_page_range
17825     0.7827  _spin_unlock

I've had mixed results with a local ext3 file with the same test.  One run had a 37 second delay
while crossing 4GB, another happily went by without incident.

-Kenny



	
		
__________________________________ 
Yahoo! Mail - PC Magazine Editors' Choice 2005 
http://mail.yahoo.com
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux