Hi all,
Whats the deal with the "kmem_cache_free" and the
"kfree"s which seem to be at the top of my 2.6.10
readprofile results??? These do not appear in the
2.4.x . I have included my readprofile results(when I
was running the TCP application, in my case, iSCSI) at
the bottom of this email.
When I run a TCP application, they hamper the
performance very badly(at least thats what I think is
happening, because all the sysctl paremeters were the
same as what I used for 2.4.x). The throughputs for
2.6.x are about 1/4 that of the corresponding 2.4.x.
They are always present irrespective of whether I run
the TCP application or not. But their impact on CPU
idle time is more drastic when I am utilizing the
network.
I have 384 MB RAM , 1/3rd of which always shows free ,
so I cant even attribute these kmem_cache_free and
kfrees to the non-availability of memory fo rthe
application processes.
Please let me know if anyone knows what these "kfrees
and kmem_cache_free's mean.
READPROFILE:
=======================================================
36846 default_idle 646.4211
615 kmem_cache_free 5.8571
351 kfree 2.6000
57 poison_obj 0.9048
117 __copy_user_intel 0.7452
30 change_page_attr 0.3614
30 __copy_to_user_ll 0.2970
18 kernel_map_pages 0.2000
9 hide_cursor 0.1731
5 dbg_redzone1 0.1282
35 do_anonymous_page 0.1014
1 vgacon_dummy 0.1000
1 pipefs_delete_dentry 0.1000
1 is_console_locked 0.100
1 syscall_exit 0.0909
16 add_softcursor 0.0777
10 __might_sleep 0.0704
6 page_remove_rmap 0.0690
18 csum_partial 0.0625
1 __down_failed_interruptible 0.0625
======================================================
Sai
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