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authorBjörn Gustavsson <bjorn@erlang.org>2011-12-06 17:25:57 +0100
committerRaimo Niskanen <raimo@erlang.org>2011-12-20 12:07:40 +0100
commite5f0a210a5b60c81172e8bdba9227abdb0834bb4 (patch)
treec093feaa4270dcfbc70aaa3fd1a2145f02227162 /lib/kernel
parentceb6dc4167d4d4c61ee41df60168cd318be624de (diff)
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prim_file_SUITE: Add large_write/1
Test writing slightly more than 4GB as an io list with smaller binaries.
Diffstat (limited to 'lib/kernel')
-rw-r--r--lib/kernel/test/prim_file_SUITE.erl82
1 files changed, 81 insertions, 1 deletions
diff --git a/lib/kernel/test/prim_file_SUITE.erl b/lib/kernel/test/prim_file_SUITE.erl
index ccf26ee034..33651fadb2 100644
--- a/lib/kernel/test/prim_file_SUITE.erl
+++ b/lib/kernel/test/prim_file_SUITE.erl
@@ -52,6 +52,10 @@
list_dir_limit/1]).
-export([advise/1]).
+-export([large_write/1]).
+
+%% System probe functions that might be handy to check from the shell
+-export([unix_free/1]).
-include_lib("test_server/include/test_server.hrl").
-include_lib("kernel/include/file.hrl").
@@ -83,7 +87,7 @@ groups() ->
cur_dir_1a, cur_dir_1b]},
{files, [],
[{group, open}, {group, pos}, {group, file_info},
- truncate, sync, datasync, advise]},
+ truncate, sync, datasync, advise, large_write]},
{open, [],
[open1, modes, close, access, read_write, pread_write,
append, exclusive]},
@@ -1322,6 +1326,22 @@ advise(Config) when is_list(Config) ->
?line test_server:timetrap_cancel(Dog),
ok.
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+large_write(Config) when is_list(Config) ->
+ run_large_file_test(Config,
+ fun(Name) -> do_large_write(Name) end,
+ "_large_write").
+
+do_large_write(Name) ->
+ ChunkSize = 256*1024*1024+1,
+ Chunks = 16,
+ Size = Chunks * ChunkSize,
+ Chunk = <<0:ChunkSize/unit:8>>,
+ Bin = lists:duplicate(Chunks, Chunk),
+ ok = prim_file:write_file(Name, Bin),
+ {ok,#file_info{size=Size}} = file:read_file_info(Name),
+ ok.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -2044,3 +2064,63 @@ list_dir_limit_cleanup(Dir, Handle, N, Cnt) ->
?PRIM_FILE:delete(Handle, filename:join(Dir, Name)),
list_dir_limit_cleanup(Dir, Handle, N, Cnt+1).
+%%%
+%%% Support for testing large files.
+%%%
+
+run_large_file_test(Config, Run, Name) ->
+ case {os:type(),os:version()} of
+ {{win32,nt},_} ->
+ do_run_large_file_test(Config, Run, Name);
+ {{unix,sunos},OsVersion} when OsVersion < {5,5,1} ->
+ {skip,"Only supported on Win32, Unix or SunOS >= 5.5.1"};
+ {{unix,_},_} ->
+ N = unix_free(?config(priv_dir, Config)),
+ io:format("Free disk: ~w KByte~n", [N]),
+ if N < 5 bsl 20 ->
+ %% Less than 5 GByte free
+ {skip,"Less than 5 GByte free disk"};
+ true ->
+ do_run_large_file_test(Config, Run, Name)
+ end;
+ _ ->
+ {skip,"Only supported on Win32, Unix or SunOS >= 5.5.1"}
+ end.
+
+
+do_run_large_file_test(Config, Run, Name0) ->
+ Name = filename:join(?config(priv_dir, Config),
+ ?MODULE_STRING ++ Name0),
+
+ %% Set up a process that will delete this file.
+ Tester = self(),
+ Deleter =
+ spawn(
+ fun() ->
+ Mref = erlang:monitor(process, Tester),
+ receive
+ {'DOWN',Mref,_,_,_} -> ok;
+ {Tester,done} -> ok
+ end,
+ prim_file:delete(Name)
+ end),
+
+ %% Run the test case.
+ Res = Run(Name),
+
+ %% Delete file and finish deleter process.
+ Mref = erlang:monitor(process, Deleter),
+ Deleter ! {Tester,done},
+ receive {'DOWN',Mref,_,_,_} -> ok end,
+
+ Res.
+
+unix_free(Path) ->
+ Cmd = ["df -k '",Path,"'"],
+ DF0 = os:cmd(Cmd),
+ io:format("$ ~s~n~s", [Cmd,DF0]),
+ Lines = re:split(DF0, "\n", [trim,{return,list}]),
+ Last = lists:last(Lines),
+ RE = "^[^\\s]*\\s+\\d+\\s+\\d+\\s+(\\d+)",
+ {match,[Avail]} = re:run(Last, RE, [{capture,all_but_first,list}]),
+ list_to_integer(Avail).