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authorFlorin Coras <fcoras@cisco.com>2017-04-19 13:00:05 -0700
committerDave Barach <openvpp@barachs.net>2017-04-24 12:02:14 +0000
commita5464817522c7a7dc760af4612f1d6a68ed0afc8 (patch)
treec173b6d4e0fac69394d3c1b61a842dc582b2a218 /src/svm/svm_fifo_segment.c
parentbc66a9122f73b97ca1ae60f1df47b39c141be3ae (diff)
Session layer improvements
Among others: - Moved app event queue to shared memory segment - Use private memory segment for builtin apps - Remove pid from svm fifo - Protect session fifo (de)allocation - Use fifo event for session disconnects - Have session queue node poll in all wk threads Change-Id: I89dbf7fdfebef12f5ef2b34ba3ef3c2c07f49ff2 Signed-off-by: Florin Coras <fcoras@cisco.com>
Diffstat (limited to 'src/svm/svm_fifo_segment.c')
-rw-r--r--src/svm/svm_fifo_segment.c50
1 files changed, 46 insertions, 4 deletions
diff --git a/src/svm/svm_fifo_segment.c b/src/svm/svm_fifo_segment.c
index acabb3bd95c..281fae27997 100644
--- a/src/svm/svm_fifo_segment.c
+++ b/src/svm/svm_fifo_segment.c
@@ -70,6 +70,44 @@ svm_fifo_segment_create (svm_fifo_segment_create_args_t * a)
return (0);
}
+/** Create an svm fifo segment in process-private memory */
+int
+svm_fifo_segment_create_process_private (svm_fifo_segment_create_args_t * a)
+{
+ svm_fifo_segment_private_t *s;
+ svm_fifo_segment_main_t *sm = &svm_fifo_segment_main;
+ ssvm_shared_header_t *sh;
+ svm_fifo_segment_header_t *fsh;
+
+ /* Allocate a fresh segment */
+ pool_get (sm->segments, s);
+ memset (s, 0, sizeof (*s));
+
+ s->ssvm.ssvm_size = ~0;
+ s->ssvm.i_am_master = 1;
+ s->ssvm.my_pid = getpid ();
+ s->ssvm.name = (u8 *) a->segment_name;
+ s->ssvm.requested_va = ~0;
+
+ /* Allocate a [sic] shared memory header, in process memory... */
+ sh = clib_mem_alloc_aligned (sizeof (*sh), CLIB_CACHE_LINE_BYTES);
+ s->ssvm.sh = sh;
+
+ memset (sh, 0, sizeof (*sh));
+ sh->heap = clib_mem_get_heap ();
+
+ /* Set up svm_fifo_segment shared header */
+ fsh = clib_mem_alloc (sizeof (*fsh));
+ memset (fsh, 0, sizeof (*fsh));
+ sh->opaque[0] = fsh;
+ s->h = fsh;
+ fsh->segment_name = format (0, "%s%c", a->segment_name, 0);
+
+ sh->ready = 1;
+ a->new_segment_index = s - sm->segments;
+ return (0);
+}
+
/** (slave) attach to an svm fifo segment */
int
svm_fifo_segment_attach (svm_fifo_segment_create_args_t * a)
@@ -82,7 +120,6 @@ svm_fifo_segment_attach (svm_fifo_segment_create_args_t * a)
/* Allocate a fresh segment */
pool_get (sm->segments, s);
-
memset (s, 0, sizeof (*s));
s->ssvm.ssvm_size = a->segment_size;
@@ -126,19 +163,22 @@ svm_fifo_segment_alloc_fifo (svm_fifo_segment_private_t * s,
sh = s->ssvm.sh;
fsh = (svm_fifo_segment_header_t *) sh->opaque[0];
+
+ ssvm_lock (sh, 1, 0);
oldheap = ssvm_push_heap (sh);
/* Note: this can fail, in which case: create another segment */
f = svm_fifo_create (data_size_in_bytes);
- if (f == 0)
+ if (PREDICT_FALSE (f == 0))
{
ssvm_pop_heap (oldheap);
+ ssvm_unlock (sh);
return (0);
}
vec_add1 (fsh->fifos, f);
-
ssvm_pop_heap (oldheap);
+ ssvm_unlock (sh);
return (f);
}
@@ -152,8 +192,9 @@ svm_fifo_segment_free_fifo (svm_fifo_segment_private_t * s, svm_fifo_t * f)
sh = s->ssvm.sh;
fsh = (svm_fifo_segment_header_t *) sh->opaque[0];
- oldheap = ssvm_push_heap (sh);
+ ssvm_lock (sh, 1, 0);
+ oldheap = ssvm_push_heap (sh);
for (i = 0; i < vec_len (fsh->fifos); i++)
{
if (fsh->fifos[i] == f)
@@ -167,6 +208,7 @@ svm_fifo_segment_free_fifo (svm_fifo_segment_private_t * s, svm_fifo_t * f)
found:
clib_mem_free (f);
ssvm_pop_heap (oldheap);
+ ssvm_unlock (sh);
}
void