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-rw-r--r--src/plugins/unittest/svm_fifo_test.c159
1 files changed, 148 insertions, 11 deletions
diff --git a/src/plugins/unittest/svm_fifo_test.c b/src/plugins/unittest/svm_fifo_test.c
index bf633b78c22..6f8873d7364 100644
--- a/src/plugins/unittest/svm_fifo_test.c
+++ b/src/plugins/unittest/svm_fifo_test.c
@@ -1225,6 +1225,7 @@ sfifo_test_fifo_grow (vlib_main_t * vm, unformat_input_t * input)
fifo_size + 100, f->size);
SFIFO_TEST (c->start_byte == fifo_size, "start byte expected %u is %u",
fifo_size, c->start_byte);
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
/*
* Add with fifo wrapped
@@ -1243,6 +1244,7 @@ sfifo_test_fifo_grow (vlib_main_t * vm, unformat_input_t * input)
fifo_size + 100, f->size);
SFIFO_TEST (c->start_byte == fifo_size + 100, "start byte expected %u is "
" %u", fifo_size + 100, c->start_byte);
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
/*
* Unwrap fifo
@@ -1255,6 +1257,7 @@ sfifo_test_fifo_grow (vlib_main_t * vm, unformat_input_t * input)
fifo_size + 200, f->size);
SFIFO_TEST (c->start_byte == fifo_size + 100, "start byte expected %u is "
"%u", fifo_size + 100, c->start_byte);
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
/*
* Add N chunks
@@ -1296,6 +1299,7 @@ sfifo_test_fifo_grow (vlib_main_t * vm, unformat_input_t * input)
fifo_size + 200 + 10 * 100, f->size);
SFIFO_TEST (f->tail == old_tail, "new tail expected %u is %u", old_tail,
f->tail);
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
/*
* Enqueue/dequeue tests
@@ -1351,6 +1355,7 @@ sfifo_test_fifo_grow (vlib_main_t * vm, unformat_input_t * input)
vlib_cli_output (vm, "[%d] dequeued %u expected %u", j, data_buf[j],
test_data[j]);
SFIFO_TEST ((rv == 0), "dequeued compared to original returned %d", rv);
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
/*
* Simple enqueue/deq and data validation (2)
@@ -1377,6 +1382,42 @@ sfifo_test_fifo_grow (vlib_main_t * vm, unformat_input_t * input)
vlib_cli_output (vm, "[%d] dequeued %u expected %u", j, data_buf[j],
test_data[j]);
SFIFO_TEST ((rv == 0), "dequeued compared to original returned %d", rv);
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
+
+ /*
+ * Simple enqueue and drop
+ */
+ for (i = 0; i <= n_enqs; i++)
+ {
+ rv = svm_fifo_enqueue (f, enq_bytes, test_data + i * enq_bytes);
+ if (rv < 0)
+ SFIFO_TEST (0, "failed to enqueue");
+ }
+
+ rv = svm_fifo_dequeue_drop (f, test_n_bytes / 2);
+ SFIFO_TEST (rv == test_n_bytes / 2, "drop should be equal");
+ SFIFO_TEST (svm_fifo_is_sane (f), "head chunk should be valid");
+ rv = svm_fifo_dequeue_drop (f, test_n_bytes / 2);
+ SFIFO_TEST (rv == test_n_bytes / 2, "drop should be equal");
+ SFIFO_TEST (svm_fifo_is_sane (f), "head chunk should be valid");
+ SFIFO_TEST (svm_fifo_max_dequeue (f) == 0, "should be empty");
+
+ /*
+ * Simple enqueue and drop all
+ */
+
+ /* Enqueue just enough data to make sure fifo is not full */
+ for (i = 0; i <= n_enqs / 2; i++)
+ {
+ rv = svm_fifo_enqueue (f, enq_bytes, test_data + i * enq_bytes);
+ if (rv < 0)
+ SFIFO_TEST (0, "failed to enqueue");
+ }
+
+ /* check drop all as well */
+ svm_fifo_dequeue_drop_all (f);
+ SFIFO_TEST (svm_fifo_is_sane (f), "head chunk should be valid");
+ SFIFO_TEST (svm_fifo_max_dequeue (f) == 0, "should be empty");
/*
* OOO enqueues/dequeues and data validation (1)
@@ -1408,6 +1449,7 @@ sfifo_test_fifo_grow (vlib_main_t * vm, unformat_input_t * input)
vlib_cli_output (vm, "[%d] dequeued %u expected %u", j, data_buf[j],
test_data[j]);
SFIFO_TEST ((rv == 0), "dequeued compared to original returned %d", rv);
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
/*
* OOO enqueues/dequeues and data validation (2)
@@ -1427,8 +1469,10 @@ sfifo_test_fifo_grow (vlib_main_t * vm, unformat_input_t * input)
goto cleanup;
}
}
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
svm_fifo_enqueue (f, enq_bytes, &test_data[0]);
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
memset (data_buf, 0, vec_len (data_buf));
for (i = 0; i <= n_deqs; i++)
@@ -1440,6 +1484,7 @@ sfifo_test_fifo_grow (vlib_main_t * vm, unformat_input_t * input)
vlib_cli_output (vm, "[%d] dequeued %u expected %u", j, data_buf[j],
test_data[j]);
SFIFO_TEST ((rv == 0), "dequeued compared to original returned %d", rv);
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
/*
* Cleanup
@@ -1554,6 +1599,7 @@ sfifo_test_fifo_shrink (vlib_main_t * vm, unformat_input_t * input)
SFIFO_TEST (f->size == 12 * chunk_size + 1, "size expected %u is %u",
12 * chunk_size + 1, f->size);
SFIFO_TEST (f->flags & SVM_FIFO_F_SHRINK, "shrink flag should be set");
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
/* Check enqueue space to force size reduction */
(void) svm_fifo_max_enqueue (f);
@@ -1564,6 +1610,7 @@ sfifo_test_fifo_shrink (vlib_main_t * vm, unformat_input_t * input)
" be set");
SFIFO_TEST (!(f->flags & SVM_FIFO_F_SHRINK), "shrink flag should not be"
" set");
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
collected = c = svm_fifo_collect_chunks (f);
rv = chunk_list_len (c);
@@ -1572,6 +1619,7 @@ sfifo_test_fifo_shrink (vlib_main_t * vm, unformat_input_t * input)
SFIFO_TEST (rv == 11, "expected %u chunks got %u", 11, rv);
SFIFO_TEST (!(f->flags & SVM_FIFO_F_COLLECT_CHUNKS), "collect flag should"
" not be set");
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
/*
* Fifo wrap and multiple chunks used
@@ -1600,6 +1648,7 @@ sfifo_test_fifo_shrink (vlib_main_t * vm, unformat_input_t * input)
SFIFO_TEST (f->size == 11 * chunk_size + 1, "size expected %u is %u",
11 * chunk_size + 1, f->size);
SFIFO_TEST (f->flags & SVM_FIFO_F_SHRINK, "shrink flag should be set");
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
/* Check enqueue space to try size reduction. Should not work */
rv = svm_fifo_max_enqueue (f);
@@ -1610,6 +1659,7 @@ sfifo_test_fifo_shrink (vlib_main_t * vm, unformat_input_t * input)
SFIFO_TEST (f->flags & SVM_FIFO_F_SHRINK, "shrink flag should be set");
SFIFO_TEST (!(f->flags & SVM_FIFO_F_COLLECT_CHUNKS), "collect flag should"
" not be set");
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
/* Dequeue byte-by-byte up to last byte on last chunk */
deq_bytes = f->size - f->size / 2 - 1;
@@ -1620,6 +1670,7 @@ sfifo_test_fifo_shrink (vlib_main_t * vm, unformat_input_t * input)
if (rv < 0)
SFIFO_TEST (0, "dequeue returned");
}
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
rv = svm_fifo_max_enqueue (f);
@@ -1635,6 +1686,7 @@ sfifo_test_fifo_shrink (vlib_main_t * vm, unformat_input_t * input)
SFIFO_TEST (f->flags & SVM_FIFO_F_SHRINK, "shrink flag should be set");
SFIFO_TEST (!(f->flags & SVM_FIFO_F_COLLECT_CHUNKS), "collect flag should"
" not be set");
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
/* Dequeue one more such that head goes beyond last chunk */
rv = svm_fifo_dequeue (f, 1, &data_buf[deq_bytes]);
@@ -1651,6 +1703,7 @@ sfifo_test_fifo_shrink (vlib_main_t * vm, unformat_input_t * input)
" set");
SFIFO_TEST (f->flags & SVM_FIFO_F_COLLECT_CHUNKS, "collect flag should"
" be set");
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
/* Dequeue the rest of the data */
deq_bytes += 1;
@@ -1681,6 +1734,7 @@ sfifo_test_fifo_shrink (vlib_main_t * vm, unformat_input_t * input)
SFIFO_TEST (rv == 8, "expected %u chunks got %u", 8, rv);
SFIFO_TEST (!(f->flags & SVM_FIFO_F_COLLECT_CHUNKS), "collect flag should"
" not be set");
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
/*
* OOO segment on chunk that should be removed
@@ -1700,6 +1754,7 @@ sfifo_test_fifo_shrink (vlib_main_t * vm, unformat_input_t * input)
rv = svm_fifo_max_enqueue (f);
SFIFO_TEST (rv == vec_len (test_data) - 200, "free space expected %u is %u",
vec_len (test_data) - 200, rv);
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
/* Ask to reduce size */
rv = svm_fifo_reduce_size (f, 3.5 * chunk_size, 0);
@@ -1708,6 +1763,7 @@ sfifo_test_fifo_shrink (vlib_main_t * vm, unformat_input_t * input)
SFIFO_TEST (f->size == 11 * chunk_size + 1, "size expected %u is %u",
11 * chunk_size + 1, f->size);
SFIFO_TEST (f->flags & SVM_FIFO_F_SHRINK, "shrink flag should be set");
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
/* Try to force size reduction but it should fail */
rv = svm_fifo_max_enqueue (f);
@@ -1719,6 +1775,7 @@ sfifo_test_fifo_shrink (vlib_main_t * vm, unformat_input_t * input)
SFIFO_TEST (f->flags & SVM_FIFO_F_SHRINK, "shrink flag should be set");
SFIFO_TEST (!(f->flags & SVM_FIFO_F_COLLECT_CHUNKS), "collect flag should"
" not be set");
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
/* Dequeue the in order data. This should shrink nitems */
rv = svm_fifo_dequeue (f, 200, data_buf);
@@ -1735,11 +1792,13 @@ sfifo_test_fifo_shrink (vlib_main_t * vm, unformat_input_t * input)
SFIFO_TEST (f->flags & SVM_FIFO_F_SHRINK, "shrink flag should be set");
SFIFO_TEST (!(f->flags & SVM_FIFO_F_COLLECT_CHUNKS), "collect flag should"
" not be set");
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
/* Enqueue the missing 50 bytes. Fifo will become full */
rv = svm_fifo_enqueue (f, 50, &test_data[200]);
SFIFO_TEST (rv == vec_len (test_data) - 200, "free space expected %u is %u",
vec_len (test_data) - 200, rv);
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
rv = svm_fifo_max_enqueue (f);
@@ -1749,6 +1808,7 @@ sfifo_test_fifo_shrink (vlib_main_t * vm, unformat_input_t * input)
SFIFO_TEST (f->flags & SVM_FIFO_F_SHRINK, "shrink flag should be set");
SFIFO_TEST (!(f->flags & SVM_FIFO_F_COLLECT_CHUNKS), "collect flag should"
" not be set");
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
/* Dequeue a chunk and check nitems shrink but fifo still full */
@@ -1764,6 +1824,7 @@ sfifo_test_fifo_shrink (vlib_main_t * vm, unformat_input_t * input)
SFIFO_TEST (f->flags & SVM_FIFO_F_SHRINK, "shrink flag should be set");
SFIFO_TEST (!(f->flags & SVM_FIFO_F_COLLECT_CHUNKS), "collect flag should"
" not be set");
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
/* Dequeue enough to unwrap the fifo */
deq_bytes = f->size - f->size / 2 - 300;
@@ -1781,6 +1842,7 @@ sfifo_test_fifo_shrink (vlib_main_t * vm, unformat_input_t * input)
" set");
SFIFO_TEST (f->flags & SVM_FIFO_F_COLLECT_CHUNKS, "collect flag should"
" be set");
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
/* Dequeue the rest */
svm_fifo_dequeue (f, test_n_bytes / 2, &data_buf[300 + deq_bytes]);
@@ -1797,13 +1859,16 @@ sfifo_test_fifo_shrink (vlib_main_t * vm, unformat_input_t * input)
SFIFO_TEST (rv == 8, "expected %u chunks got %u", 8, rv);
SFIFO_TEST (!(f->flags & SVM_FIFO_F_COLLECT_CHUNKS), "collect flag should"
" not be set");
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
chunk_list_splice (collected, c);
/*
- * Remove all chunks possible
+ * Remove all chunks possible (1)
+ *
+ * Tail and head are in first chunk that is not removed
*/
- svm_fifo_init_pointers (f, 601, 601);
+ svm_fifo_init_pointers (f, 600, 600);
rv = svm_fifo_reduce_size (f, 8 * chunk_size, 1);
SFIFO_TEST (rv == 7 * chunk_size, "actual len expected %u is %u",
7 * chunk_size, rv);
@@ -1814,10 +1879,12 @@ sfifo_test_fifo_shrink (vlib_main_t * vm, unformat_input_t * input)
SFIFO_TEST (f->flags & SVM_FIFO_F_SHRINK, "shrink flag should be set");
SFIFO_TEST (!(f->flags & SVM_FIFO_F_COLLECT_CHUNKS), "collect flag should"
" not be set");
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
rv = svm_fifo_max_enqueue (f);
SFIFO_TEST (rv == chunk_size, "free space expected %u is %u", chunk_size,
rv);
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
/* Force head/tail to move to first chunk */
svm_fifo_enqueue (f, 1, test_data);
@@ -1832,6 +1899,57 @@ sfifo_test_fifo_shrink (vlib_main_t * vm, unformat_input_t * input)
" set");
SFIFO_TEST (f->flags & SVM_FIFO_F_COLLECT_CHUNKS, "collect flag should"
" be set");
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
+
+ c = svm_fifo_collect_chunks (f);
+ rv = chunk_list_len (c);
+ SFIFO_TEST (rv == 7, "expected %u chunks got %u", 7, rv);
+ SFIFO_TEST (!(f->flags & SVM_FIFO_F_COLLECT_CHUNKS), "collect flag should"
+ " not be set");
+ SFIFO_TEST (!(f->flags & SVM_FIFO_F_MULTI_CHUNK), "multi-chunk flag should"
+ " not be set");
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
+
+ /* re-add chunks for next test */
+ svm_fifo_add_chunk (f, c);
+
+ /*
+ * Remove all chunks possible (2)
+ *
+ * Tail and head are in the first chunk that should eventually be removed
+ */
+ svm_fifo_init_pointers (f, 601, 601);
+ rv = svm_fifo_reduce_size (f, 8 * chunk_size, 1);
+ SFIFO_TEST (rv == 7 * chunk_size, "actual len expected %u is %u",
+ 7 * chunk_size, rv);
+ SFIFO_TEST (f->size == 7 * chunk_size + 1, "size expected %u is %u",
+ 7 * chunk_size + 1, f->size);
+ SFIFO_TEST (f->nitems == 1 * chunk_size, "nitems expected %u is %u",
+ 1 * chunk_size, f->nitems);
+ SFIFO_TEST (f->flags & SVM_FIFO_F_SHRINK, "shrink flag should be set");
+ SFIFO_TEST (!(f->flags & SVM_FIFO_F_COLLECT_CHUNKS), "collect flag should"
+ " not be set");
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
+
+ rv = svm_fifo_max_enqueue (f);
+ SFIFO_TEST (rv == chunk_size, "free space expected %u is %u", chunk_size,
+ rv);
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
+
+ /* Force head/tail to move to first chunk */
+ svm_fifo_enqueue (f, chunk_size, test_data);
+ svm_fifo_dequeue (f, chunk_size, data_buf);
+ rv = svm_fifo_max_enqueue (f);
+
+ SFIFO_TEST (rv == chunk_size, "free space expected %u is %u", chunk_size,
+ rv);
+ SFIFO_TEST (f->size == chunk_size + 1, "size expected %u is %u",
+ chunk_size + 1, f->size);
+ SFIFO_TEST (!(f->flags & SVM_FIFO_F_SHRINK), "shrink flag should not be"
+ " set");
+ SFIFO_TEST (f->flags & SVM_FIFO_F_COLLECT_CHUNKS, "collect flag should"
+ " be set");
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
c = svm_fifo_collect_chunks (f);
rv = chunk_list_len (c);
@@ -1840,6 +1958,7 @@ sfifo_test_fifo_shrink (vlib_main_t * vm, unformat_input_t * input)
" not be set");
SFIFO_TEST (!(f->flags & SVM_FIFO_F_MULTI_CHUNK), "multi-chunk flag should"
" not be set");
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
chunk_list_splice (collected, c);
@@ -1982,6 +2101,7 @@ sfifo_test_fifo_segment_fifo_grow (int verbose)
fifo_segment_grow_fifo (fs, f, fifo_size);
SFIFO_TEST (f->size == 2 * fifo_size, "fifo size should be %u is %u",
2 * fifo_size, f->size);
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
n_chunks = fifo_segment_num_free_chunks (fs, fifo_size);
SFIFO_TEST (n_chunks == n_batch - 2, "free 2^10B chunks "
@@ -2063,6 +2183,7 @@ sfifo_test_fifo_segment_fifo_grow (int verbose)
SFIFO_TEST (n_free_chunk_bytes - 16 * fifo_size == rv, "free chunk bytes "
"expected %u is %u", n_free_chunk_bytes - 16 * fifo_size, rv);
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
fifo_segment_free_fifo (fs, f);
rv = fifo_segment_fl_chunk_bytes (fs);
@@ -2081,6 +2202,8 @@ sfifo_test_fifo_segment_fifo_grow (int verbose)
32 * fifo_size);
f = fifo_segment_alloc_fifo (fs, 17 * fifo_size, FIFO_SEGMENT_RX_FIFO);
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
+
rv = fifo_segment_fl_chunk_bytes (fs);
/* Make sure that the non-power of two chunk freed above is correctly
@@ -2100,6 +2223,7 @@ sfifo_test_fifo_segment_fifo_grow (int verbose)
*/
f = fifo_segment_alloc_fifo (fs, n_free_chunk_bytes, FIFO_SEGMENT_RX_FIFO);
SFIFO_TEST (f != 0, "allocation should work");
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
fifo_segment_free_fifo (fs, f);
@@ -2388,7 +2512,7 @@ sfifo_test_fifo_segment_prealloc (int verbose)
u32 max_pairs, pairs_req, free_space, pair_mem;
svm_fifo_t *f, *old;
fifo_segment_t *fs;
- int rv;
+ int rv, alloc;
clib_memset (a, 0, sizeof (*a));
@@ -2438,26 +2562,39 @@ sfifo_test_fifo_segment_prealloc (int verbose)
SFIFO_TEST (rv == 0, "prealloc chunks expected %u is %u", 0, rv);
rv = fifo_segment_fl_chunk_bytes (fs);
SFIFO_TEST (rv == 0, "chunk free space expected %u is %u", 0, rv);
+ SFIFO_TEST (svm_fifo_is_sane (f), "fifo should be sane");
/*
* Multiple preallocs that consume the remaining space
*/
+ fifo_segment_update_free_bytes (fs);
+ free_space = fifo_segment_free_bytes (fs);
pair_mem = 2 * (4096 + sizeof (*f) + sizeof (svm_fifo_chunk_t));
- max_pairs = pairs_req = free_space / pair_mem - 1;
+ max_pairs = pairs_req = (free_space / pair_mem) - 1;
fifo_segment_preallocate_fifo_pairs (fs, 4096, 4096, &pairs_req);
- SFIFO_TEST (pairs_req == 0, "prealloc pairs should work");
+ SFIFO_TEST (pairs_req == 0, "prealloc pairs should work req %u", max_pairs);
rv = fifo_segment_num_free_chunks (fs, 4096);
SFIFO_TEST (rv == max_pairs * 2, "prealloc chunks expected %u is %u",
max_pairs * 2, rv);
- rv = fifo_segment_prealloc_fifo_chunks (fs, 4096, 2);
- SFIFO_TEST (rv == 0, "chunk prealloc should work");
+ fifo_segment_update_free_bytes (fs);
+ rv = fifo_segment_free_bytes (fs);
+ SFIFO_TEST (rv < 2 * pair_mem, "free bytes %u less than %u", rv,
+ 2 * pair_mem);
+
+ /* Preallocate as many more chunks as possible. Heap is almost full
+ * so we may not use all the free space*/
+ alloc = 0;
+ while (!fifo_segment_prealloc_fifo_chunks (fs, 4096, 1))
+ alloc++;
+ SFIFO_TEST (alloc, "chunk prealloc should work %u", alloc);
rv = fifo_segment_num_free_chunks (fs, 4096);
- SFIFO_TEST (rv == (max_pairs + 1) * 2, "prealloc chunks expected %u is %u",
- (max_pairs + 1) * 2, rv);
+ SFIFO_TEST (rv == max_pairs * 2 + alloc, "prealloc chunks expected %u "
+ "is %u", max_pairs * 2 + alloc, rv);
- free_space = fifo_segment_free_bytes (fs);
- SFIFO_TEST (rv < 8192, "free bytes expected less than %u is %u", 8192, rv);
+ rv = fifo_segment_free_bytes (fs);
+ SFIFO_TEST (rv < pair_mem, "free bytes expected less than %u is %u",
+ pair_mem, rv);
/*
* Test negative prealloc cases