Your own code and their run on a different platform:
Quote:
Originally Posted by alister
...
The tests were repeated several times in different orders. The times never varied significantly. 1.25x faster is a far, far cry from 440x.
...
The above run itself is around 8X performance difference in performance with standard sha1sum utility.
Quote:
Originally Posted by alister
...
... I am compelled to say that it is absurd to tell someone that they will realize a 440x run time improvement without any knowledge of their task, their code, or their hardware.
...
The above was run on a FreeBSD7.1 machine; -a very busy build machine, we have in lab!!!
One should not conclude for the overall scenario with few runs on simple tests performed on a type of H/w & one platform only; because this might differ drastically in other environment especially a controlled ones like appliances/devices;
wherein something might be configured to run with 100% CPU utilization and with hi-priority (in multi-core/CPU environment). I think you should have considered this too!!!
Now about 440x performance: You calculated it with the data I described, great!!! You still don't know the environment my c-program ran and I got the kind of performance difference.
Fact:
IBM ISS Proventia GX-series IPS devices, under FIPS mode, run a boot-time integrity check (with SHA1 hash), of the entire disk, in just around 3 seconds (around 5 seconds on low end the models).
The devices are in public domain and you should have a look at it.
Under similar conditions that Perl script based utility had a 22-mintues of run!!!
Last edited by Praveen_218; 04-21-2013 at 03:36 PM..
Hi folks,
could anyone please tell me how can i switch between two users without going thru the su(i.e. root)?
is there any such command?
thanks in advance,
thell (1 Reply)
Hi,
what is the use of the double quotes and !! in the following code segment:
su - user1 << ""!! > /dev/null 2>&1
echo "welcome user1"
EOF
!!
also what is the difference between below:
su - user1 << ""!! > /dev/null 2>&1 and
su - $USER << ""!!!> /dev/null 2>&1.
Note: $USER =... (1 Reply)
Hi,
what is the use of the double quotes and !! in the following code segment:
su - user1 << ""!! > /dev/null 2>&1
echo "welcome user1"
EOF
!!
also what is the difference between below:
su - user1 << ""!! > /dev/null 2>&1 and
su - $USER << ""!!!> /dev/null 2>&1.
Note: $USER =... (2 Replies)
Can any one tell me :
How we can switch between two users without prompting for the password. (In the SHELL SCRIPT can we fetch the USERID and PASSWORD from a specified file, without using SUDO command)? (2 Replies)
Hi all,
we have running some linux servers with sles9 and we have some problems with our dns servers. Sometimes they don't like to work. However, is there a parameter to enable faster switching between two ore more dns servers?
Thx for your help in front
Regards
frank (5 Replies)
Hi
I want to write a script which can switch between super users.But it asks for the password at the prompt.How can I manage in the script so that it didnt ask me for the password at the prompt. (1 Reply)
greetings,
i hope this hasn't been covered previously. has anyone heard of a .kext or daemon that would allow linux or (open)solaris-like vt switching? googling didn't help much..
i know os x allows a '>console' login from loginwindow.app, but i'm mainly interested in this because there are... (0 Replies)
Hi
I'm quite new with linux.
Very simple, I need to swap every 2 lines in a file.
Example
INPUT:
a a a
b b b
x x x
y y y
s s s
t t t
OUTPUT:
b b b
a a a
y y y
x x x
t t t (5 Replies)
HI,
I am using the windows 2003 server R2 in there we are using the putty as to access the different AP's
now from the primary AP i want to login to several different AP's using a script
what the script will do is :-
input a text file in which list of different ap's and the corresponding... (0 Replies)
Hello Folks
I am writing this simple program but I am stuck at this point. Here is the snippet from my script where I have issues.
3) echo "Current Directory: $(pwd) Menu 3"
echo -e "Enter a file name\n"
read fname
if
then
... (5 Replies)