9 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hey guys,
Suppose i run passwd via bash shell. It is a suid program, which temporarily runs as root(owner) and modifies the user entries.
However, when i write a C file and give 4755 permission and root ownership to the 'a.out' file , it doesn't run as root in bash shell. I verified this by... (2 Replies)
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2. IP Networking
Hi,
I am trying my hand in networking programming in C, and got stuck in piping.
I was following some tutorial and did the forking like :
while (1)
{
newsockfd = accept(sockfd,
(struct sockaddr *) &cli_addr, &clilen);
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... (4 Replies)
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3. Shell Programming and Scripting
I have one script that calls another script during execution. The other script does some processing, then either returns with exit 0 (if successful), or exits with error code numbers (if failed). However, in addition to the error code, I would like for that second script to be able to pass a... (4 Replies)
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4. Solaris
Hello,
Has somebody download it before oracle deleted from support section?
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oracle.com/us/products/tools/message-passing-toolkit-070499.html Oracle Message Passing Toolkit
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section decommissioned. Same in support and edelivery
I phoned to oracle support and... (2 Replies)
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5. UNIX for Dummies Questions & Answers
Are the programs written on schedulers ,thread library , process management, memory management, et al called systems programs ? How are they different from the programs that implement functions like open() , printf() , scanf() , read() .. they have a prefix sys_open, sys_close, sys_read etc , right... (1 Reply)
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6. UNIX for Advanced & Expert Users
i want to add a system call(successfuly added) and pass the message(which contains int and a string)
/*code i used my program calling system call printmsg*/
message mm;
mm.m1_i1=10;
mm.m1_p1="hello";
printmsg(&mm);
/*user library*/
printmsg(*m1)
{
printf("integer... (1 Reply)
Discussion started by: kathir_dz
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7. UNIX Benchmarks
CPU: 1 x PA8600, 440MHz
RAM: 1GB
Hardware model: 9000/800/N4000-44
BYTE UNIX Benchmarks (Version 3.11)
System -- HP-UX xxx B.11.11 U 9000/800 615379343 unlimited-user license
Start Benchmark Run: Tue Apr 4 05:43:42 IST 2006
1 interactive users.
Dhrystone 2 without register... (0 Replies)
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8. Linux
I work in a computer company which sells computer configurations and parts of them. And I want to give a choice to customers. If they want to buy a PC with Linux installed, not Windows. But I find difficult to test the Graphic Cards in Linux OS. I have searched the web and I didn't found any... (2 Replies)
Discussion started by: vlatkop
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9. Programming
Dear All,
Would you tell me how I can passing a message along pipes?
I have built a token ring connected with pipes, but I don't know how to pass the message along it through the command line...
Thx.
Yours,
i- (1 Reply)
Discussion started by: iminus
1 Replies
mbw(1) General Commands Manual mbw(1)
NAME
mbw - Memory BandWidth benchmark
SYNOPSIS
mbw [options] arraysize_in_MiB
DESCRIPTION
mbw determines available memory bandwidth by copying large arrays of data in memory.
OPTIONS
-q Quiet; suppress informational messages.
-a Suppress printing the average of each test.
-n <number>
Select number of loops per test
-t <number>
Select tests to be run. If no -t parameters are given the default is to run all tests. -t0: memcpy() test, -t1: dumb (b[i]=a[i]
style) test, -t2: memcpy() with arbitrary block size
-b <bytes>
Block size in bytes for -t2.
-h Show quick help.
USAGE
mbw will allocate two arraysize arrays in memory and copy one to the other. Reported 'bandwidth' is the amount of data copied over the
time this operation took.
Obviously mbw needs twice arraysize MiBytes (1024*1024 bytes) of physical memory - you'd better switch off swap or otherwise make sure no
paging occurs. Needless to say that it should not be run on a busy system.
TODO
Multiple thread support. Better configurability, including using getopt() for parsing arguments.
AUTHOR
andras.horvath@gmail.com
memory bandwidth benchmark Apr 26, 2006 mbw(1)