Software Map

sdd is a replacement for a program called 'dd'. sdd is much faster than dd in cases where input block size (ibs) is not equal to the output block size (obs). Statistics are more easily understood than those from 'dd'. Timing available, -time option will print transfer speed Timing & Statistics available at any time with SIGQUIT (^\) Can seek on input and output Fast null input Fast null output. Support for the RMT (Remote Tape Server) protocol makes remote I/O fast and easy.

This small tool connects to the P6Spy JDBC logger
and displays in real time the queries going to the
database. It uses an integrated SQL parser to
build statistics on the most accessed tables and
columns to enable database index creation. Other
information is also gathered and displayed, such
as the request time for a single request, for a
class of request, and for all the requests.
Sorting may be done on these views to detect
database problems efficiently.

kernbench is a CPU throughput benchmark. It is designed to
compare kernels on the same machine, or to compare
hardware. It runs a kernel compile at various numbers of
concurrent jobs: 1/2 number of CPUs, optimal (default is
4xnumber of CPUs), and maximal job count. Optionally it can
also run single threaded. It then prints out a number of useful
statistics for the average of each group of runs.

SLAMD is a Java application designed for stress testing and
performance analysis of network-based applications.
Although it was originally designed for benchmarking
directory servers, it is actually very flexible and can be used
to test applications using a wide range of protocols like
LDAP, HTTP, POP, IMAP, and SMTP, and can also interact
with relational databases using JDBC. In addition, it provides
a Java-based API for developing custom workloads, and a
scripting engine and record and playback tools that may also
be used in the load generation process.

lmbench is a suite of simple, portable ANSI/C
microbenchmarks for UNIX/POSIX. In general,
it measures two key features: latency and
bandwidth. It is intended to give system
developers insight into basic costs of key
operations.

dbench is a filesystem benchmark that generates
load patterns similar to those of the commercial
Netbench benchmark, but without requiring a lab of
Windows load generators to run. It is now
considered a de-facto standard for generating load
on the Linux VFS.

cdck is a simple program for verifying CD/DVD
quality. Even if all files on the disc are
readable, some sectors having bad timing and could
become unreadable in the future. The tool reads a
disc sector by sector, recording all reading
timings, and then tells you its verdict. It can
optionally write a timing table into a text file
usable by gnuplot, from which graphs can be drawn.

The Java Application Monitor (JAMon) is a free,
simple, high performance, thread safe, Java API
that allows developers to easily monitor
production applications. JAMon can be used to
determine application performance bottlenecks,
user/application interactions, and application
scalability. JAMon gathers summary statistics such
as hits, execution times (total, average, minimum,
maximum, standard deviation), and simultaneous
application requests. JAMon statistics are
displayed in the sortable JAMon report.

Cpipe copies its standard input to its standard
output while measuring the time it takes to read
an input buffer and write an output buffer.
Statistics of average throughput and the total
amount of bytes copied are printed to the standard
error output.

多くのプロセッサとより多くのプロセスの面でより良い、Linux のスケールを作るの研究方法。