Connectathon NFS tests

1 环境

下载dkruchinin/cthon-nfs-tests代码，编辑文件tests.init，只需以下几个变量，其他都可以删除:

CC=cc
CFLAGS=`echo -DLINUX`
LOCKTESTS=tlock
PATH=${PATH}:.

然后执行编译命令:

make -j16

更多的内容请查看Connectathon NFS tests README中文翻译。

2 测试

挂载:

mount -t nfs -o vers=4.2 ${server_ip}:/s_test /mnt

basic, special, lock测试都测试成功:

./runtests -b -f /mnt/test
./runtests -s -f /mnt/test
./runtests -l -f /mnt/test

general测试失败:

./runtests -g -f /mnt/test

把general/runtests.wrk文件的./stat nroff.time一行用#注释掉，其他用例测试通过。

3 general Nroff测试失败原因分析

接下来我们看看general Nroff测试为什么失败。

general测试包含几种: Small Compile， Tbl， Nroff，Large Compile，Four simultaneous large compiles，Makefile。

报错信息如下:

...
Small Compile
        0.0 (0.0) real  0.3 (0.0) user  0.0 (0.0) sys

Tbl
        0.0 (0.0) real  0.0 (0.0) user  0.0 (0.0) sys

Nroff
./stat: no data in nroff.time
general tests failed

查看nroff.time的内容:

warning: file 'nroff.in', around line 52:                                      
  table wider than line width                                                  
0.02user 0.12system 0:00.14elapsed 104%CPU (0avgtext+0avgdata 5860maxresident)k
0inputs+24outputs (0major+1249minor)pagefaults 0swaps
...                          
warning: file 'nroff.in', around line 52:                                      
  table wider than line width                                                  
0.02user 0.12system 0:00.14elapsed 104%CPU (0avgtext+0avgdata 5860maxresident)k
0inputs+24outputs (0major+1253minor)pagefaults 0swaps

再对比Small Compile测试的输出文件smcomp.time:

0.03user 0.30system 0:00.38elapsed 88%CPU (0avgtext+0avgdata 20608maxresident)k
0inputs+96outputs (0major+5662minor)pagefaults 0swaps
...
0.02user 0.32system 0:00.38elapsed 88%CPU (0avgtext+0avgdata 20352maxresident)k
0inputs+96outputs (0major+5660minor)pagefaults 0swaps

对比发现nroff.time文件多了一些警告，而其他内容都差不多:

warning: file 'nroff.in', around line 52:                                      
  table wider than line width

看到这里，我们大概知道原因了，猜测是一些额外的输出没有过滤掉，我们做个实验，general/runtests.wrk文件修改以下内容，把77，78行注释掉:

74 set -e
75 # Filter excessive noise from GNU tbl.  Should be harmless for other
76 # versions of tbl.
77 # egrep -v '^tbl:.*$' <tbl.time >tbl.new
78 # mv -f tbl.new tbl.time
79 ./stat tbl.time
80 set +e

我们发现Tbl测试也失败了，查看/mnt/test/tbl.time文件，多了以下内容:

tbl:nroff.in:47: excess data entry '_' discarded
tbl:nroff.in:51: excess data entry '_' discarded

4 修改方案

因此，要想让Nroff测试通过，只需要把nroff.time文件的警告过滤掉就可以:

warning: file 'nroff.in', around line 52:                                      
  table wider than line width

只需修改general/runtests.wrk文件:

diff --git a/general/runtests.wrk b/general/runtests.wrk
index 5efc091..04dae8e 100644
--- a/general/runtests.wrk
+++ b/general/runtests.wrk
@@ -89,6 +89,8 @@ $TIME nroff < nroff.tbl > nroff.out 2>> nroff.time || cat nroff.time
 $TIME nroff < nroff.tbl > nroff.out 2>> nroff.time || cat nroff.time
 rm nroff.out nroff.tbl
 set -e
+egrep -v '^warning:.*$|^  table wider.*$' <nroff.time >nroff.new
+mv -f nroff.new nroff.time
 ./stat nroff.time
 set +e

现在，执行./runtests -g -f /mnt/test命令你就能看到很漂亮的输出:

GENERAL TESTS: directory /mnt/test
cd /mnt/test; rm -f Makefile runtests runtests.wrk *.sh *.c mkdummy rmdummy nroff.in makefile.tst
cp Makefile runtests runtests.wrk *.sh *.c mkdummy rmdummy nroff.in makefile.tst /mnt/test

Small Compile
        0.0 (0.0) real  0.3 (0.0) user  0.0 (0.0) sys

Tbl
        0.0 (0.0) real  0.0 (0.0) user  0.0 (0.0) sys

Nroff
        0.0 (0.0) real  0.1 (0.0) user  0.0 (0.0) sys

Large Compile
        0.0 (0.0) real  0.3 (0.0) user  0.0 (0.0) sys

Four simultaneous large compiles
        0.1 (0.0) real  1.2 (0.0) user  0.0 (0.0) sys

Makefile
        0.0 (0.0) real  0.3 (0.0) user  0.0 (0.0) sys

General tests complete

All tests completed