Add --with-timeoutfactor=NUM to specify TIMEOUTFACTOR

On Ice Lake and Tiger Lake laptops, some test programs timeout when there
are 3 "make check -j8" runs in parallel.  Add --with-timeoutfactor=NUM to
specify an integer to scale the timeout of test programs, which can be
overriden by TIMEOUTFACTOR environment variable.

Reviewed-by: Florian Weimer <fweimer@redhat.com>

INSTALL

@@ -106,6 +106,11 @@ if 'CFLAGS' is specified it must enable optimization.  For example:
      particular case and potentially change debugging information and
      metadata only).
 
+'--with-timeoutfactor=NUM'
+     Specify an integer NUM to scale the timeout of test programs.  This
+     factor can be changed at run time using 'TIMEOUTFACTOR' environment
+     variable.
+
 '--disable-shared'
      Don't build shared libraries even if it is possible.  Not all
      systems support shared libraries; you need ELF support and

config.h.in

@@ -196,6 +196,9 @@
 /* Define to 1 if libpthread actually resides in libc.  */
 #define PTHREAD_IN_LIBC 0
 
+/* An integer used to scale the timeout of test programs.  */
+#define TIMEOUTFACTOR 1
+
 /*
  */
 

configure

@@ -764,6 +764,7 @@ with_selinux
 with_headers
 with_default_link
 with_nonshared_cflags
+with_timeoutfactor
 enable_sanity_checks
 enable_shared
 enable_profile
@@ -1482,6 +1483,8 @@ Optional Packages:
   --with-default-link     do not use explicit linker scripts
   --with-nonshared-cflags=CFLAGS
                           build nonshared libraries with additional CFLAGS
+  --with-timeoutfactor=NUM
+                          specify an integer to scale the timeout
   --with-cpu=CPU          select code for CPU variant
 
 Some influential environment variables:
@@ -3386,6 +3389,19 @@ fi
 
 
 
+
+# Check whether --with-timeoutfactor was given.
+if test "${with_timeoutfactor+set}" = set; then :
+  withval=$with_timeoutfactor; timeoutfactor=$withval
+else
+  timeoutfactor=1
+fi
+
+cat >>confdefs.h <<_ACEOF
+#define TIMEOUTFACTOR $timeoutfactor
+_ACEOF
+
+
 # Check whether --enable-sanity-checks was given.
 if test "${enable_sanity_checks+set}" = set; then :
   enableval=$enable_sanity_checks; enable_sanity=$enableval

configure.ac

@@ -163,6 +163,13 @@ AC_ARG_WITH([nonshared-cflags],
 	    [extra_nonshared_cflags=])
 AC_SUBST(extra_nonshared_cflags)
 
+AC_ARG_WITH([timeoutfactor],
+	    AS_HELP_STRING([--with-timeoutfactor=NUM],
+			   [specify an integer to scale the timeout]),
+	    [timeoutfactor=$withval],
+	    [timeoutfactor=1])
+AC_DEFINE_UNQUOTED(TIMEOUTFACTOR, $timeoutfactor)
+
 AC_ARG_ENABLE([sanity-checks],
 	      AS_HELP_STRING([--disable-sanity-checks],
 			     [really do not use threads (should not be used except in special situations) @<:@default=yes@:>@]),

manual/install.texi

@@ -131,6 +131,11 @@ that the objects in @file{libc_nonshared.a} are compiled with this flag
 (although this will not affect the generated code in this particular
 case and potentially change debugging information and metadata only).
 
+@item --with-timeoutfactor=@var{NUM}
+Specify an integer @var{NUM} to scale the timeout of test programs.
+This factor can be changed at run time using @env{TIMEOUTFACTOR}
+environment variable.
+
 @c disable static doesn't work currently
 @c @item --disable-static
 @c Don't build static libraries.  Static libraries aren't that useful these

support/support_test_main.c

@@ -286,7 +286,7 @@ support_test_main (int argc, char **argv, const struct test_config *config)
   int direct = 0;       /* Directly call the test function?  */
   int status;
   int opt;
-  unsigned int timeoutfactor = 1;
+  unsigned int timeoutfactor = TIMEOUTFACTOR;
   pid_t termpid;
 
   /* If we're debugging the test, we need to disable timeouts and use