[RFC 0/3] GDB Performance testing

[Yao Qi <yao at codesourcery dot com>]

This patch series implement GDB performance testing infrastructure
according to the design I posted here
<https://sourceware.org/ml/gdb-patches/2013-08/msg00380.html>

Here are some highlights:

  - Performance testing can be run via 'make check-perf'
  - GDB and GDBServer is started by dejagnu, so the usage of
'make check-perf' is same as the usage of existing 'make check'.
  - Performance test result is saved in testsuite/perftest.log, which
is appended in multiple runs.
  - Workload of each test can be customized by passing parameters to
'make check-perf'.

The basic usages and the outputs are as follows:

$ make check-perf
$ cat ./testsuite/perftest.log
solib 8 0.01
solib 16 0.03
solib 32 0.07
solib 64 0.19
solib 128 0.54

$ make check-perf RUNTESTFLAGS="--target_board=native-gdbserver solib.exp"
$ cat ./testsuite/perftest.log
solib 8 0.03
solib 16 0.05
solib 32 0.11
solib 64 0.26
solib 128 0.78

Specify the number of solibs in the test.
$ make check-perf RUNTESTFLAGS="--target_board=native-gdbserver solib.exp SOLIB_NUMBER=1024"
$ cat ./testsuite/perftest.log
solib 64 0.25
solib 128 0.7
solib 256 2.38
solib 512 9.67
solib 1024 53.0

GDB python doesn't know the perftest package located in
testsuite/gdb.perf/lib, so in every test, we need the following two
statements to add the path to sys.path.

  gdb_test_no_output "python import os, sys"
  gdb_test_no_output "python sys.path.insert\(0, os.path.abspath\(\"${srcdir}/${subdir}/lib\"\)\)"

I'll add other test cases when the basic form of test case is
determined.

*** BLURB HERE ***

Yao Qi (3):
  New make target 'check-perf' and new dir gdb.perf
  Perf test framework
  Test on solib load and unload

 gdb/Makefile.in                                   |    8 ++
 gdb/testsuite/Makefile.in                         |   15 +++-
 gdb/testsuite/configure                           |    3 +-
 gdb/testsuite/configure.ac                        |    2 +-
 gdb/testsuite/gdb.perf/Makefile.in                |   15 ++++
 gdb/testsuite/gdb.perf/lib/perftest/config.py     |   40 ++++++++++
 gdb/testsuite/gdb.perf/lib/perftest/perftest.py   |   49 ++++++++++++
 gdb/testsuite/gdb.perf/lib/perftest/reporter.py   |   38 +++++++++
 gdb/testsuite/gdb.perf/lib/perftest/testresult.py |   42 ++++++++++
 gdb/testsuite/gdb.perf/solib.c                    |   79 +++++++++++++++++++
 gdb/testsuite/gdb.perf/solib.exp                  |   86 +++++++++++++++++++++
 gdb/testsuite/gdb.perf/solib.py                   |   48 ++++++++++++
 12 files changed, 420 insertions(+), 5 deletions(-)
 create mode 100644 gdb/testsuite/gdb.perf/Makefile.in
 create mode 100644 gdb/testsuite/gdb.perf/lib/perftest/__init__.py
 create mode 100644 gdb/testsuite/gdb.perf/lib/perftest/config.py
 create mode 100644 gdb/testsuite/gdb.perf/lib/perftest/perftest.py
 create mode 100644 gdb/testsuite/gdb.perf/lib/perftest/reporter.py
 create mode 100644 gdb/testsuite/gdb.perf/lib/perftest/testresult.py
 create mode 100644 gdb/testsuite/gdb.perf/solib.c
 create mode 100644 gdb/testsuite/gdb.perf/solib.exp
 create mode 100644 gdb/testsuite/gdb.perf/solib.py

-- 
1.7.7.6