| # Copied the test over from client/tests. The upstream test relies on make |
| # and perl. I wanted to avoid that. I also wanted to run each benchmark |
| # individually so that we can tune the runs to be as deterministic as |
| # possible (using taskset, nice, etc). I also wanted to be able to |
| # break up the test so that we can run individual tests. |
| |
| import os |
| from autotest_lib.client.bin import test, utils |
| from autotest_lib.client.common_lib import error |
| |
| class kernel_Lmbench(test.test): |
| version = 1 |
| |
| def _lat_ctx(self, processes): |
| """ |
| Run lat_ctx with 0 kbyte messages (-s 0). |
| |
| To improve determinism, we use taskset to pin to a CPU and |
| nice to prevent another process from being scheduled between |
| lat_ctx processes. |
| |
| For further details on lat_ctx (output format, etc) see: |
| http://lmbench.sourceforge.net/man/lat_ctx.8.html |
| """ |
| cmd = '%s/bin/lat_ctx -s 0 %s' % (self.srcdir, processes) |
| out = utils.system_output('taskset 0x1 nice -20 %s 2>&1' % cmd) |
| return float(out.split()[-1]) |
| |
| |
| def initialize(self): |
| self.job.require_gcc() |
| |
| |
| def setup(self, tarball='lmbench3.tar.bz2'): |
| """ |
| Install lmbench. |
| |
| Uncompresses the original lmbench tarball, applies patches to fix |
| some build issues, configures lmbench and then modifies the config |
| files to use appropriate directory and file locations. |
| |
| @param tarball: Lmbench tarball. |
| @see: http://www.bitmover.com/lm/lmbench/lmbench3.tar.gz |
| (original tarball, shipped as is in autotest). |
| """ |
| tarball = utils.unmap_url(self.bindir, tarball, self.tmpdir) |
| utils.extract_tarball_to_dir(tarball, self.srcdir) |
| pwd = os.getcwd() |
| os.chdir(self.srcdir) |
| patches = ['0001-Fix-build-issues-with-lmbench.patch', |
| '0002-Changing-shebangs-on-lmbench-scripts.patch', |
| '0003-makefile.patch'] |
| for patch in patches: |
| utils.system('patch -p1 < ../%s' % patch) |
| # Set OS='' to avoid create a host-specific bin directory |
| utils.make('OS=') |
| os.chdir(pwd) |
| |
| |
| def run_once(self): |
| # For now just run lat_ctx but plan to add more tests |
| result = self._lat_ctx(processes=8) |
| self.write_perf_keyval({'lat_ctx_s0_p8': result}) |
