I'm trying to compile Linpack on a Ubuntu cluster. I'm running MPI. I've modified the following values to fit my system TOPdir MPdir LAlib CC LINKER.
When compiling I get the following error: (the error is at the end, the other errors in between are because I've ran the script several times so... (0 Replies)
I've just been handed a hot potato from a colleague who left :(... our client has been complaining about slow performance on one of our servers.
I'm not very experienced in investigating performance issues so I hoping someone will be so kind to provide some guidance
Here is an overview of the... (8 Replies)
hello everyone ,
Im new to HPL. i wanted to know whether High performance linpack solves linear
system of equations for single precision airthmatic on LINUX.
it works for double precision , so is there any HPL version which is for single precision.\
thanks . (0 Replies)
I am interested in setting up some High Performance Computing clusters and would like to get people's views and experiences on this.
I have 2 requirements:
1. Compute clusters to do fast cpu intensive computations
2. Storage clusters of parallel and extendable filesystems spread across many... (6 Replies)
I have a problem with my AIX 5.3. Recently my unix shows a high cpu utilization with sar or topas.
I need to find what I have to do to solve this problem, in fact, I don't know what is my problem.
I had the same problem with another AIX 5.3 running the same... (2 Replies)
Discussion started by: wilder.mellotto
LEARN ABOUT OPENSOLARIS
gethrtime(9F) Kernel Functions for Drivers gethrtime(9F)NAME
gethrtime - get high resolution time
The gethrtime() function returns the current high-resolution real time. Time is expressed as nanoseconds since some arbitrary time in the
past; it is not correlated in any way to the time of day, and thus is not subject to resetting or drifting by way of adjtime(2) or settime-
ofday(3C). The hi-res timer is ideally suited to performance measurement tasks, where cheap, accurate interval timing is required.
gethrtime() always returns the current high-resolution real time. There are no error conditions.
There are no restrictions on the context from which gethrtime() can be called.
SEE ALSO proc(1), gettimeofday(3C), settimeofday(3C), attributes(5)NOTES
Although the units of hi-res time are always the same (nanoseconds), the actual resolution is hardware dependent. Hi-res time is guaranteed
to be monotonic (it does not go backward, it does not periodically wrap) and linear (it does not occasionally speed up or slow down for
adjustment, as the time of day can), but not necessarily unique: two sufficiently proximate calls might return the same value.
The time base used for this function is the same as that for gethrtime(3C). Values returned by both of these functions can be interleaved
for comparison purposes.
SunOS 5.11 2 Oct 2007 gethrtime(9F)