11-10-2014
Many will recommend iozone (can take a long time to run). But from my own experience, you can get away with a simple bonnie++ in 99% of all cases with regards to accurate performance measurements. For Bonnie++ use the RW statistics as your "general performance" guideline.
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
i recently purchased a dual ross sparc processor kit from someone.
the person listed these items as 133mhz processors, however, looking at bridgepoint's site, they do not make 133mhz processors.
so i was wondering, how can i check the processor speeds? (4 Replies)
Discussion started by: xyyz
4 Replies
2. Solaris
Hello all,
We have a group of Solaris 8 machines that are having some real network performance issues, they all go through a switch which *should* be set at 100 mb full duplex on every port which goes back to a master switch. I have checked the machines and the NIC cards are all set at 100 full.... (9 Replies)
Discussion started by: Mr Pink
9 Replies
3. Solaris
Hello,
I have a SUN T5240 running Solaris 10 with Logical Domain Manager (v 1.0.3). You can use the "ldm" command to display current resources on the box. Is there away to display all the "physical resources" on the box(i.e.,used and unused). For example, "ldm ls" will tell me what the... (5 Replies)
Discussion started by: stephanpitts
5 Replies
4. UNIX for Advanced & Expert Users
We have some AIX Unix Servers with 4 or 6 CPU and when type this command “c” in nmon always displays each cpu % with Averages on buttom. However we have several Servers with 18 CPU's and it only shows 16 17 on main page. Does nmon have some command that would show remaining with totals for Physical... (3 Replies)
Discussion started by: groosha
3 Replies
5. AIX
Hello All,
Can anybody please tell me what is the maximum limit of Physical IBM Power Machine which can be handled by single HMC at a single point of time?
Thanks,
Jenish (1 Reply)
Discussion started by: jenish_shah
1 Replies
6. IP Networking
Hi all
I have connected new server to LAN but when I use rlogin command by server name it dose not work but by IP adderss it works.
can any one tell the reason? (4 Replies)
Discussion started by: bintaleb
4 Replies
7. UNIX for Advanced & Expert Users
Hi All,
How can I know whether the server I am connecting to is a virtual or physical one? The server might be having any Unix OS (Linux/Solaris/HP-UX etc.).
Is there any system files / commands which can show these concrete information?
Thanks in advance for the replies.
sanzee (1 Reply)
Discussion started by: sanzee007
1 Replies
8. Shell Programming and Scripting
Does anyone have a script that can be run to tell you if you are on either a VM Linux or a physical Linux server? (15 Replies)
Discussion started by: bigbenn
15 Replies
9. Solaris
Hi,
i am trying to find whether any particular solaris server is physical or virtual....are there any commands or set of commands which only runs (or provide specific pattern ) on physical machines and provides different pattern or error on virtual one...
Is this the correct approach to... (7 Replies)
Discussion started by: omkar.jadhav
7 Replies
10. Solaris
Need inputs when physical server is coming down (ex- init 0) .
We have a physical server in that there are couple of LDOM's and in LDOM's there are couple of Zones . In zones there are applications running .
Physical Server (T4 Server) -> LDOM -> ZONES -> applications
There are scripts... (1 Reply)
Discussion started by: ajayram_arya
1 Replies
LEARN ABOUT OSF1
sched_yield
sched_yield(3) Library Functions Manual sched_yield(3)
NAME
sched_yield - Signals scheduler a willingness to yield to another thread.
LIBRARY
DECthreads POSIX 1003.1c Library (libpthread.so)
SYNOPSIS
#include <pthread.h>
void sched_yield(void);
STANDARDS
Interfaces documented on this reference page conform to industry standards as follows:
IEEE Std 1003.1c-1995, POSIX System Application Program Interface
PARAMETERS
None
DESCRIPTION
This routine forces the running thread to relinquish the processor until it again becomes the head of its thread list. This routine noti-
fies the thread scheduler that the current thread is willing to release its processor to other threads of equivalent or greater scheduling
precedence. (A thread generally will release its processor to a thread of a greater scheduling precedence without calling this routine.)
If no other threads of equivalent or greater scheduling precedence are ready to execute, the thread continues.
This routine can allow knowledge of the details of an application to be used to improve its performance. If a thread does not call
sched_yield, other threads may be given the opportunity to run at arbitrary points (possibly even when the interrupted thread holds a
required resource). By making strategic calls to sched_yield, other threads can be given the opportunity to run when the resources are
free. This can sometimes improve performance by reducing contention for the resource.
As a general guideline, consider calling this routine after a thread has released a resource (such as a mutex) that is heavily contended
for by other threads. This can be especially important if the program is running on a uniprocessor machine, or if the thread acquires and
releases the resource inside a tight loop.
Use this routine carefully and sparingly, because misuse can cause unnecessary context switching which will increase overhead and degrade
performance. For example, it is counter-productive for a thread to yield while it holds a resource that the threads to which it is yielding
will need. Likewise, it is pointless to yield unless there is likely to be another thread that is ready to run.
RETURN VALUES
None
RELATED INFORMATION
Functions: pthread_attr_setschedparam(3), pthread_setschedparam(3)
Manuals: Guide to DECthreads and Programmer's Guide
delim off
sched_yield(3)