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-rw-r--r--src/plugins/unittest/CMakeLists.txt1
-rw-r--r--src/plugins/unittest/counter_test.c262
-rw-r--r--src/vlib/counter.c51
-rw-r--r--src/vlib/test/test_counters.py37
4 files changed, 335 insertions, 16 deletions
diff --git a/src/plugins/unittest/CMakeLists.txt b/src/plugins/unittest/CMakeLists.txt
index 2b358a5d906..64a7706034b 100644
--- a/src/plugins/unittest/CMakeLists.txt
+++ b/src/plugins/unittest/CMakeLists.txt
@@ -50,4 +50,5 @@ add_vpp_plugin(unittest
unittest.c
util_test.c
vlib_test.c
+ counter_test.c
)
diff --git a/src/plugins/unittest/counter_test.c b/src/plugins/unittest/counter_test.c
new file mode 100644
index 00000000000..24b9e1e386e
--- /dev/null
+++ b/src/plugins/unittest/counter_test.c
@@ -0,0 +1,262 @@
+/*
+ * Copyright (c) 2021 EMnify.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include <vlib/vlib.h>
+#include <vppinfra/time.h>
+#include <vppinfra/cache.h>
+#include <vppinfra/error.h>
+
+#include <vlib/counter.h>
+#include <vpp/stats/stat_segment.h>
+
+enum
+{
+ type_simple = 0,
+ type_combined,
+};
+
+enum
+{
+ test_expand = 0,
+};
+
+/*
+ * Return the stats segment epoch value.
+ */
+static uint64_t
+get_stats_epoch ()
+{
+ stat_segment_main_t *sm = &stat_segment_main;
+ return sm->shared_header->epoch;
+}
+
+/*
+ * Return the maximum element count of the vector based on its allocated
+ * memory.
+ */
+static int
+get_vec_mem_size (void *v, uword data_size)
+{
+ stat_segment_main_t *sm = &stat_segment_main;
+
+ if (v == 0)
+ return 0;
+
+ uword aligned_header_bytes = vec_header_bytes (0);
+ void *p = v - aligned_header_bytes;
+ void *oldheap = clib_mem_set_heap (sm->heap);
+ int mem_size = (clib_mem_size (p) - aligned_header_bytes) / data_size;
+ clib_mem_set_heap (oldheap);
+
+ return mem_size;
+}
+
+/* number of times to repeat the counter expand tests */
+#define EXPAND_TEST_ROUNDS 3
+
+/*
+ * Let a simple counter vector grow and verify that
+ * the stats epoch is increased only when the vector
+ * is expanded.
+ */
+static clib_error_t *
+test_simple_counter_expand (vlib_main_t *vm)
+{
+ vlib_simple_counter_main_t counter = {
+ .name = "test-simple-counter-expand",
+ .stat_segment_name = "/vlib/test-simple-counter-expand",
+ };
+ int i, index;
+ uint64_t epoch, new_epoch;
+
+ // Create one counter to allocate the vector.
+ vlib_validate_simple_counter (&counter, 0);
+ epoch = get_stats_epoch ();
+
+ for (i = 0; i < EXPAND_TEST_ROUNDS; i++)
+ {
+ // Check how many elements fit into the counter vector without expanding
+ // that. The next validate calls should not increase the stats segment
+ // epoch.
+ int mem_size = get_vec_mem_size (counter.counters[0],
+ sizeof ((counter.counters[0])[0]));
+ for (index = 1; index <= mem_size - 1; index++)
+ {
+ vlib_validate_simple_counter (&counter, index);
+ new_epoch = get_stats_epoch ();
+ if (new_epoch != epoch)
+ return clib_error_return (
+ 0, "Stats segment epoch should not increase");
+ }
+
+ // The next counter index does not fit and it will extend the vector.
+ // The stats segment epoch should increase.
+ vlib_validate_simple_counter (&counter, index + 1);
+ new_epoch = get_stats_epoch ();
+ if (new_epoch == epoch)
+ return clib_error_return (0,
+ "Stats segment epoch should have increased");
+ epoch = new_epoch;
+ }
+
+ return 0;
+}
+
+/*
+ * Let a combined counter vector grow and verify that
+ * the stats epoch is increased only when the vector
+ * is expanded.
+ */
+static clib_error_t *
+test_combined_counter_expand (vlib_main_t *vm)
+{
+ vlib_combined_counter_main_t counter = {
+ .name = "test-combined-counter-expand",
+ .stat_segment_name = "/vlib/test-combined-counter-expand",
+ };
+ int i, index;
+ uint64_t epoch, new_epoch;
+
+ // Create one counter to allocate the vector.
+ vlib_validate_combined_counter (&counter, 0);
+ epoch = get_stats_epoch ();
+
+ for (i = 0; i < EXPAND_TEST_ROUNDS; i++)
+ {
+ // Check how many elements fit into the counter vector without expanding
+ // that. The next validate calls should not increase the stats segment
+ // epoch.
+ int mem_size = get_vec_mem_size (counter.counters[0],
+ sizeof ((counter.counters[0])[0]));
+ for (index = 1; index <= mem_size - 1; index++)
+ {
+ vlib_validate_combined_counter (&counter, index);
+ new_epoch = get_stats_epoch ();
+ if (new_epoch != epoch)
+ return clib_error_return (
+ 0, "Stats segment epoch should not increase");
+ }
+
+ // The next counter index does not fit and it will extend the vector.
+ // The stats segment epoch should increase.
+ vlib_validate_combined_counter (&counter, index + 1);
+ new_epoch = get_stats_epoch ();
+ if (new_epoch == epoch)
+ return clib_error_return (0,
+ "Stats segment epoch should have increased");
+ epoch = new_epoch;
+ }
+
+ return 0;
+}
+
+static clib_error_t *
+test_simple_counter (vlib_main_t *vm, int test_case)
+{
+ clib_error_t *error;
+
+ switch (test_case)
+ {
+ case test_expand:
+ error = test_simple_counter_expand (vm);
+ break;
+
+ default:
+ return clib_error_return (0, "no such test");
+ }
+
+ return error;
+}
+
+static clib_error_t *
+test_combined_counter (vlib_main_t *vm, int test_case)
+{
+ clib_error_t *error;
+
+ switch (test_case)
+ {
+ case test_expand:
+ error = test_combined_counter_expand (vm);
+ break;
+
+ default:
+ return clib_error_return (0, "no such test");
+ }
+
+ return error;
+}
+
+static clib_error_t *
+test_counter_command_fn (vlib_main_t *vm, unformat_input_t *input,
+ vlib_cli_command_t *cmd)
+{
+ clib_error_t *error;
+ int counter_type = -1;
+ int test_case = -1;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "simple"))
+ counter_type = type_simple;
+ else if (unformat (input, "combined"))
+ counter_type = type_combined;
+ else if (unformat (input, "expand"))
+ test_case = test_expand;
+ else
+ return clib_error_return (0, "unknown input '%U'",
+ format_unformat_error, input);
+ }
+
+ if (test_case == -1)
+ return clib_error_return (0, "no such test");
+
+ switch (counter_type)
+ {
+ case type_simple:
+ error = test_simple_counter (vm, test_case);
+ break;
+
+ case type_combined:
+ error = test_combined_counter (vm, test_case);
+ break;
+
+ default:
+ return clib_error_return (0, "no such test");
+ }
+
+ return error;
+}
+
+VLIB_CLI_COMMAND (test_counter_command, static) = {
+ .path = "test counter",
+ .short_help = "test counter [simple | combined] expand",
+ .function = test_counter_command_fn,
+};
+
+static clib_error_t *
+test_counter_init (vlib_main_t *vm)
+{
+ return (0);
+}
+
+VLIB_INIT_FUNCTION (test_counter_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/vlib/counter.c b/src/vlib/counter.c
index 81c81aea02f..186b48d869e 100644
--- a/src/vlib/counter.c
+++ b/src/vlib/counter.c
@@ -79,15 +79,26 @@ void
vlib_validate_simple_counter (vlib_simple_counter_main_t * cm, u32 index)
{
vlib_thread_main_t *tm = vlib_get_thread_main ();
- int i;
+ int i, resized = 0;
void *oldheap = vlib_stats_push_heap (cm->counters);
vec_validate (cm->counters, tm->n_vlib_mains - 1);
for (i = 0; i < tm->n_vlib_mains; i++)
- vec_validate_aligned (cm->counters[i], index, CLIB_CACHE_LINE_BYTES);
-
- vlib_stats_pop_heap (cm, oldheap, index,
- 2 /* STAT_DIR_TYPE_COUNTER_VECTOR_SIMPLE */ );
+ if (index >= vec_len (cm->counters[i]))
+ {
+ if (vec_resize_will_expand (cm->counters[i],
+ index - vec_len (cm->counters[i]) +
+ 1 /* length_increment */))
+ resized++;
+ vec_validate_aligned (cm->counters[i], index, CLIB_CACHE_LINE_BYTES);
+ }
+
+ /* Avoid the epoch increase when there was no counter vector resize. */
+ if (resized)
+ vlib_stats_pop_heap (cm, oldheap, index,
+ 2 /* STAT_DIR_TYPE_COUNTER_VECTOR_SIMPLE */);
+ else
+ clib_mem_set_heap (oldheap);
}
void
@@ -108,15 +119,26 @@ void
vlib_validate_combined_counter (vlib_combined_counter_main_t * cm, u32 index)
{
vlib_thread_main_t *tm = vlib_get_thread_main ();
- int i;
+ int i, resized = 0;
void *oldheap = vlib_stats_push_heap (cm->counters);
vec_validate (cm->counters, tm->n_vlib_mains - 1);
for (i = 0; i < tm->n_vlib_mains; i++)
- vec_validate_aligned (cm->counters[i], index, CLIB_CACHE_LINE_BYTES);
-
- vlib_stats_pop_heap (cm, oldheap, index,
- 3 /*STAT_DIR_TYPE_COUNTER_VECTOR_COMBINED */ );
+ if (index >= vec_len (cm->counters[i]))
+ {
+ if (vec_resize_will_expand (cm->counters[i],
+ index - vec_len (cm->counters[i]) +
+ 1 /* length_increment */))
+ resized++;
+ vec_validate_aligned (cm->counters[i], index, CLIB_CACHE_LINE_BYTES);
+ }
+
+ /* Avoid the epoch increase when there was no counter vector resize. */
+ if (resized)
+ vlib_stats_pop_heap (cm, oldheap, index,
+ 3 /*STAT_DIR_TYPE_COUNTER_VECTOR_COMBINED */);
+ else
+ clib_mem_set_heap (oldheap);
}
int
@@ -130,8 +152,7 @@ int
/* Possibly once in recorded history */
if (PREDICT_FALSE (vec_len (cm->counters) == 0))
{
- vlib_stats_pop_heap (cm, oldheap, index,
- 3 /*STAT_DIR_TYPE_COUNTER_VECTOR_COMBINED */ );
+ clib_mem_set_heap (oldheap);
return 1;
}
@@ -144,13 +165,11 @@ int
index - vec_len (cm->counters[i]) +
1 /* length_increment */))
{
- vlib_stats_pop_heap (cm, oldheap, index,
- 3 /*STAT_DIR_TYPE_COUNTER_VECTOR_COMBINED */ );
+ clib_mem_set_heap (oldheap);
return 1;
}
}
- vlib_stats_pop_heap (cm, oldheap, index,
- 3 /*STAT_DIR_TYPE_COUNTER_VECTOR_COMBINED */ );
+ clib_mem_set_heap (oldheap);
return 0;
}
diff --git a/src/vlib/test/test_counters.py b/src/vlib/test/test_counters.py
new file mode 100644
index 00000000000..5c63308fcb0
--- /dev/null
+++ b/src/vlib/test/test_counters.py
@@ -0,0 +1,37 @@
+#!/usr/bin/env python3
+
+from framework import VppTestCase
+
+
+class TestCounters(VppTestCase):
+ """ Counters C Unit Tests """
+
+ @classmethod
+ def setUpClass(cls):
+ super(TestCounters, cls).setUpClass()
+
+ @classmethod
+ def tearDownClass(cls):
+ super(TestCounters, cls).tearDownClass()
+
+ def setUp(self):
+ super(TestCounters, self).setUp()
+
+ def tearDown(self):
+ super(TestCounters, self).tearDown()
+
+ def test_counter_simple_expand(self):
+ """ Simple Counter Expand """
+ error = self.vapi.cli("test counter simple expand")
+
+ if error:
+ self.logger.critical(error)
+ self.assertNotIn('failed', error)
+
+ def test_counter_combined_expand(self):
+ """ Combined Counter Expand """
+ error = self.vapi.cli("test counter combined expand")
+
+ if error:
+ self.logger.critical(error)
+ self.assertNotIn('failed', error)