create CUDA cache (for JIT compiled PTX code) in build dir instead of $HOME

easybuild/framework/easyblock.py

@@ -1034,6 +1034,27 @@ def make_dir(self, dir_name, clean, dontcreateinstalldir=False):
 
         mkdir(dir_name, parents=True)
 
+    def set_up_cuda_cache(self):
+        """Set up CUDA PTX cache."""
+
+        cuda_cache_maxsize = build_option('cuda_cache_maxsize')
+        if cuda_cache_maxsize is None:
+            cuda_cache_maxsize = 1 * 1024  # 1 GiB default value
+        else:
+            cuda_cache_maxsize = int(cuda_cache_maxsize)
+
+        if cuda_cache_maxsize == 0:
+            self.log.info("Disabling CUDA PTX cache since cache size was set to zero")
+            env.setvar('CUDA_CACHE_DISABLE', '1')
+        else:
+            cuda_cache_dir = build_option('cuda_cache_dir')
+            if not cuda_cache_dir:
+                cuda_cache_dir = os.path.join(self.builddir, 'eb-cuda-cache')
+            self.log.info("Enabling CUDA PTX cache of size %s MiB at %s", cuda_cache_maxsize, cuda_cache_dir)
+            env.setvar('CUDA_CACHE_DISABLE', '0')
+            env.setvar('CUDA_CACHE_PATH', cuda_cache_dir)
+            env.setvar('CUDA_CACHE_MAXSIZE', str(cuda_cache_maxsize * 1024 * 1024))
+
     #
     # MODULE UTILITY FUNCTIONS
     #
@@ -2163,6 +2184,10 @@ def prepare_step(self, start_dir=True, load_tc_deps_modules=True):
             self.log.info("Loading extra modules: %s", extra_modules)
             self.modules_tool.load(extra_modules)
 
+        # Setup CUDA cache if required. If we don't do this, CUDA will use the $HOME for its cache files
+        if get_software_root('CUDA') or get_software_root('CUDAcore'):
+            self.set_up_cuda_cache()
+
         # guess directory to start configure/build/install process in, and move there
         if start_dir:
             self.guess_start_dir()

easybuild/tools/config.py

@@ -171,6 +171,8 @@ def mk_full_default_path(name, prefix=DEFAULT_PREFIX):
         'container_image_name',
         'container_template_recipe',
         'container_tmpdir',
+        'cuda_cache_dir',
+        'cuda_cache_maxsize',
         'cuda_compute_capabilities',
         'download_timeout',
         'dump_test_report',

easybuild/tools/options.py

@@ -358,6 +358,11 @@ def override_options(self):
             'consider-archived-easyconfigs': ("Also consider archived easyconfigs", None, 'store_true', False),
             'containerize': ("Generate container recipe/image", None, 'store_true', False, 'C'),
             'copy-ec': ("Copy specified easyconfig(s) to specified location", None, 'store_true', False),
+            'cuda-cache-dir': ("Path to CUDA cache dir to use if enabled. Defaults to a path inside the build dir.",
+                               str, 'store', None, {'metavar': "PATH"}),
+            'cuda-cache-maxsize': ("Maximum size of the CUDA cache (in MiB) used for JIT compilation of PTX code. "
+                                   "Leave value empty to let EasyBuild choose a value or '0' to disable the cache",
+                                   int, 'store_or_None', None),
             'cuda-compute-capabilities': ("List of CUDA compute capabilities to use when building GPU software; "
                                           "values should be specified as digits separated by a dot, "
                                           "for example: 3.5,5.0,7.2", 'strlist', 'extend', None),

test/framework/easyblock.py

@@ -1894,6 +1894,60 @@ def test_prepare_step_hmns(self):
         self.assertEqual(len(loaded_modules), 1)
         self.assertEqual(loaded_modules[0]['mod_name'], 'GCC/6.4.0-2.28')
 
+    def test_prepare_step_cuda_cache(self):
+        """Test handling cuda-cache-* options."""
+
+        init_config(build_options={'cuda_cache_maxsize': None})  # Automatic mode
+
+        test_ecs = os.path.join(os.path.abspath(os.path.dirname(__file__)), 'easyconfigs', 'test_ecs')
+        toy_ec = os.path.join(test_ecs, 't', 'toy', 'toy-0.0.eb')
+        ec = process_easyconfig(toy_ec)[0]
+        eb = EasyBlock(ec['ec'])
+        eb.silent = True
+        eb.make_builddir()
+
+        eb.prepare_step(start_dir=False)
+        logtxt = read_file(eb.logfile)
+        self.assertNotIn('Disabling CUDA PTX cache', logtxt)
+        self.assertNotIn('Enabling CUDA PTX cache', logtxt)
+
+        # Now with CUDA
+        test_ec = os.path.join(self.test_prefix, 'test.eb')
+        test_ectxt = re.sub('^toolchain = .*', "toolchain = {'name': 'gcccuda', 'version': '2018a'}",
+                            read_file(toy_ec), flags=re.M)
+        write_file(test_ec, test_ectxt)
+        ec = process_easyconfig(test_ec)[0]
+        eb = EasyBlock(ec['ec'])
+        eb.silent = True
+        eb.make_builddir()
+
+        write_file(eb.logfile, '')
+        eb.prepare_step(start_dir=False)
+        logtxt = read_file(eb.logfile)
+        self.assertNotIn('Disabling CUDA PTX cache', logtxt)
+        self.assertIn('Enabling CUDA PTX cache', logtxt)
+        self.assertEqual(os.environ['CUDA_CACHE_DISABLE'], '0')
+
+        init_config(build_options={'cuda_cache_maxsize': 0})  # Disable
+        write_file(eb.logfile, '')
+        eb.prepare_step(start_dir=False)
+        logtxt = read_file(eb.logfile)
+        self.assertIn('Disabling CUDA PTX cache', logtxt)
+        self.assertNotIn('Enabling CUDA PTX cache', logtxt)
+        self.assertEqual(os.environ['CUDA_CACHE_DISABLE'], '1')
+
+        # Specified size and location
+        cuda_cache_dir = os.path.join(self.test_prefix, 'custom-cuda-cache')
+        init_config(build_options={'cuda_cache_maxsize': 1234, 'cuda_cache_dir': cuda_cache_dir})
+        write_file(eb.logfile, '')
+        eb.prepare_step(start_dir=False)
+        logtxt = read_file(eb.logfile)
+        self.assertNotIn('Disabling CUDA PTX cache', logtxt)
+        self.assertIn('Enabling CUDA PTX cache', logtxt)
+        self.assertEqual(os.environ['CUDA_CACHE_DISABLE'], '0')
+        self.assertEqual(os.environ['CUDA_CACHE_MAXSIZE'], str(1234 * 1024 * 1024))
+        self.assertEqual(os.environ['CUDA_CACHE_PATH'], cuda_cache_dir)
+
     def test_checksum_step(self):
         """Test checksum step"""
         testdir = os.path.abspath(os.path.dirname(__file__))

test/framework/modules.py

@@ -54,7 +54,7 @@
 
 
 # number of modules included for testing purposes
-TEST_MODULES_COUNT = 81
+TEST_MODULES_COUNT = 82
 
 
 class ModulesTest(EnhancedTestCase):

test/framework/modules/gcccuda/2018a

@@ -0,0 +1,26 @@
+#%Module
+
+proc ModulesHelp { } {
+    puts stderr {   GCC based compiler toolchain with CUDA support, and including
+ OpenMPI for MPI support, OpenBLAS (BLAS and LAPACK support), FFTW and ScaLAPACK. - Homepage: (none)
+}
+}
+
+module-whatis {GNU Compiler Collection (GCC) based compiler toolchain, along with CUDA toolkit. - Homepage: (none)}
+
+set root    /prefix/software/gcccuda/2018a
+
+conflict    gcccuda
+
+if { ![is-loaded GCC/6.4.0-2.28] } {
+    module load GCC/6.4.0-2.28
+}
+
+if { ![is-loaded CUDA/9.1.85] } {
+    module load CUDA/9.1.85
+}
+
+
+setenv	EBROOTGCCCUDA		"$root"
+setenv	EBVERSIONGCCCUDA		"2018a"
+setenv	EBDEVELGCCCUDA		"$root/easybuild/gcccuda-2018a-easybuild-devel"

test/framework/options.py

@@ -4666,7 +4666,7 @@ def test_modules_tool_vs_syntax_check(self):
             regex = re.compile(pattern, re.M)
             self.assertTrue(regex.search(stdout), "Pattern '%s' found in: %s" % (regex.pattern, stdout))
 
-    def test_prefix(self):
+    def test_prefix_option(self):
         """Test which configuration settings are affected by --prefix."""
         txt, _ = self._run_mock_eb(['--show-full-config', '--prefix=%s' % self.test_prefix], raise_error=True)