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-rw-r--r--src/vnet/session/application.c7
-rw-r--r--src/vnet/session/application_interface.h2
-rw-r--r--src/vnet/session/segment_manager.c89
-rw-r--r--src/vnet/session/segment_manager.h11
4 files changed, 90 insertions, 19 deletions
diff --git a/src/vnet/session/application.c b/src/vnet/session/application.c
index 646d6b6de2c..0dcb3e6ad94 100644
--- a/src/vnet/session/application.c
+++ b/src/vnet/session/application.c
@@ -550,6 +550,10 @@ application_alloc_and_init (app_init_args_t * a)
props->use_mq_eventfd = 1;
if (options[APP_OPTIONS_TLS_ENGINE])
app->tls_engine = options[APP_OPTIONS_TLS_ENGINE];
+ if (options[APP_OPTIONS_HIGH_WATERMARK])
+ props->high_watermark = options[APP_OPTIONS_HIGH_WATERMARK];
+ if (options[APP_OPTIONS_LOW_WATERMARK])
+ props->low_watermark = options[APP_OPTIONS_LOW_WATERMARK];
props->segment_type = seg_type;
/* Add app to lookup by api_client_index table */
@@ -698,8 +702,7 @@ application_alloc_worker_and_init (application_t * app, app_worker_t ** wrk)
sm = segment_manager_alloc ();
sm->app_wrk_index = app_wrk->wrk_index;
- if ((rv = segment_manager_init (sm, app->sm_properties.segment_size,
- app->sm_properties.prealloc_fifos)))
+ if ((rv = segment_manager_init (sm)))
{
app_worker_free (app_wrk);
return rv;
diff --git a/src/vnet/session/application_interface.h b/src/vnet/session/application_interface.h
index 552fec1b6ef..d03994fc1f9 100644
--- a/src/vnet/session/application_interface.h
+++ b/src/vnet/session/application_interface.h
@@ -201,6 +201,8 @@ typedef enum
APP_OPTIONS_PROXY_TRANSPORT,
APP_OPTIONS_ACCEPT_COOKIE,
APP_OPTIONS_TLS_ENGINE,
+ APP_OPTIONS_HIGH_WATERMARK,
+ APP_OPTIONS_LOW_WATERMARK,
APP_OPTIONS_N_OPTIONS
} app_attach_options_index_t;
diff --git a/src/vnet/session/segment_manager.c b/src/vnet/session/segment_manager.c
index 0a54b96a125..25fbd6f2c04 100644
--- a/src/vnet/session/segment_manager.c
+++ b/src/vnet/session/segment_manager.c
@@ -29,6 +29,8 @@ typedef struct segment_manager_main_
u32 default_fifo_size; /**< default rx/tx fifo size */
u32 default_segment_size; /**< default fifo segment size */
u32 default_app_mq_size; /**< default app msg q size */
+ u8 default_high_watermark; /**< default high watermark % */
+ u8 default_low_watermark; /**< default low watermark % */
} segment_manager_main_t;
static segment_manager_main_t sm_main;
@@ -54,6 +56,8 @@ segment_manager_props_init (segment_manager_props_t * props)
props->rx_fifo_size = sm_main.default_fifo_size;
props->tx_fifo_size = sm_main.default_fifo_size;
props->evt_q_size = sm_main.default_app_mq_size;
+ props->high_watermark = sm_main.default_high_watermark;
+ props->low_watermark = sm_main.default_low_watermark;
props->n_slices = vlib_num_workers () + 1;
return props;
}
@@ -160,6 +164,13 @@ segment_manager_add_segment (segment_manager_t * sm, uword segment_size)
*/
fs_index = fs - sm->segments;
+ /*
+ * Set watermarks in segment
+ */
+ fs->h->high_watermark = sm->high_watermark;
+ fs->h->low_watermark = sm->low_watermark;
+ fs->h->flags &= ~FIFO_SEGMENT_F_MEM_LIMIT;
+
done:
if (vlib_num_workers ())
@@ -307,11 +318,12 @@ segment_manager_alloc (void)
* Returns error if ssvm segment(s) allocation fails.
*/
int
-segment_manager_init (segment_manager_t * sm, uword first_seg_size,
- u32 prealloc_fifo_pairs)
+segment_manager_init (segment_manager_t * sm)
{
u32 rx_fifo_size, tx_fifo_size, pair_size;
u32 rx_rounded_data_size, tx_rounded_data_size;
+ uword first_seg_size;
+ u32 prealloc_fifo_pairs;
u64 approx_total_size, max_seg_size = ((u64) 1 << 32) - (128 << 10);
segment_manager_props_t *props;
fifo_segment_t *segment;
@@ -319,7 +331,13 @@ segment_manager_init (segment_manager_t * sm, uword first_seg_size,
int seg_index, i;
props = segment_manager_properties_get (sm);
- first_seg_size = clib_max (first_seg_size, sm_main.default_segment_size);
+ first_seg_size = clib_max (props->segment_size,
+ sm_main.default_segment_size);
+ prealloc_fifo_pairs = props->prealloc_fifos;
+
+ segment_manager_set_watermarks (sm,
+ props->high_watermark,
+ props->low_watermark);
if (prealloc_fifo_pairs)
{
@@ -434,6 +452,27 @@ segment_manager_get_if_valid (u32 index)
return pool_elt_at_index (sm_main.segment_managers, index);
}
+static fifo_segment_t *
+find_max_free_segment (segment_manager_t * sm, u32 thread_index)
+{
+ fifo_segment_t *cur, *fs = 0;
+ uword free_bytes, max_free_bytes = 0;
+
+ clib_rwlock_reader_lock (&sm->segments_rwlock);
+ /* *INDENT-OFF* */
+ pool_foreach (cur, sm->segments, ({
+ if ((free_bytes = fifo_segment_free_bytes (cur)) > max_free_bytes)
+ {
+ max_free_bytes = free_bytes;
+ fs = cur;
+ }
+ }));
+ /* *INDENT-ON* */
+ clib_rwlock_reader_unlock (&sm->segments_rwlock);
+
+ return fs;
+}
+
u32
segment_manager_index (segment_manager_t * sm)
{
@@ -569,19 +608,25 @@ segment_manager_alloc_session_fifos (segment_manager_t * sm,
/*
* Find the first free segment to allocate the fifos in
*/
+ fs = find_max_free_segment (sm, thread_index);
- /* *INDENT-OFF* */
- segment_manager_foreach_segment_w_lock (fs, sm, ({
- alloc_fail = segment_manager_try_alloc_fifos (fs,
- thread_index,
- props->rx_fifo_size,
- props->tx_fifo_size,
- rx_fifo, tx_fifo);
- /* Exit with lock held, drop it after notifying app */
- if (!alloc_fail)
- goto alloc_success;
- }));
- /* *INDENT-ON* */
+ if (fs)
+ {
+ clib_rwlock_reader_lock (&sm->segments_rwlock);
+ alloc_fail = segment_manager_try_alloc_fifos (fs, thread_index,
+ props->rx_fifo_size,
+ props->tx_fifo_size,
+ rx_fifo, tx_fifo);
+ /* On success, keep lock until fifos are initialized */
+ if (!alloc_fail)
+ goto alloc_success;
+
+ segment_manager_segment_reader_unlock (sm);
+ }
+ else
+ {
+ alloc_fail = 1;
+ }
alloc_check:
@@ -787,6 +832,8 @@ segment_manager_main_init (segment_manager_main_init_args_t * a)
sm->default_fifo_size = 1 << 12;
sm->default_segment_size = 1 << 20;
sm->default_app_mq_size = 128;
+ sm->default_high_watermark = 80;
+ sm->default_low_watermark = 50;
}
static clib_error_t *
@@ -910,6 +957,18 @@ segment_manager_format_sessions (segment_manager_t * sm, int verbose)
clib_rwlock_reader_unlock (&sm->segments_rwlock);
}
+void
+segment_manager_set_watermarks (segment_manager_t * sm,
+ u8 high_watermark, u8 low_watermark)
+{
+ ASSERT (high_watermark >= 0 && high_watermark <= 100 &&
+ low_watermark >= 0 && low_watermark <= 100 &&
+ low_watermark <= high_watermark);
+
+ sm->high_watermark = high_watermark;
+ sm->low_watermark = low_watermark;
+}
+
/*
* fd.io coding-style-patch-verification: ON
*
diff --git a/src/vnet/session/segment_manager.h b/src/vnet/session/segment_manager.h
index 52f89eef171..cad95509b2e 100644
--- a/src/vnet/session/segment_manager.h
+++ b/src/vnet/session/segment_manager.h
@@ -34,6 +34,8 @@ typedef struct _segment_manager_props
u8 n_slices; /**< number of fs slices/threads */
ssvm_segment_type_t segment_type; /**< seg type: if set to SSVM_N_TYPES,
private segments are used */
+ u8 high_watermark; /**< memory usage high watermark % */
+ u8 low_watermark; /**< memory usage low watermark % */
} segment_manager_props_t;
typedef struct _segment_manager
@@ -58,6 +60,9 @@ typedef struct _segment_manager
* App event queue allocated in first segment
*/
svm_msg_q_t *event_queue;
+
+ u8 high_watermark;
+ u8 low_watermark;
} segment_manager_t;
typedef struct segment_manager_main_init_args_
@@ -69,8 +74,7 @@ typedef struct segment_manager_main_init_args_
#define SEGMENT_MANAGER_INVALID_APP_INDEX ((u32) ~0)
segment_manager_t *segment_manager_alloc (void);
-int segment_manager_init (segment_manager_t * sm, uword first_seg_size,
- u32 prealloc_fifo_pairs);
+int segment_manager_init (segment_manager_t * sm);
/**
* Cleanup segment manager
@@ -118,6 +122,9 @@ int segment_manager_try_alloc_fifos (fifo_segment_t * fs,
void segment_manager_dealloc_fifos (svm_fifo_t * rx_fifo,
svm_fifo_t * tx_fifo);
+void segment_manager_set_watermarks (segment_manager_t * sm,
+ u8 high_watermark, u8 low_watermark);
+
u8 segment_manager_has_fifos (segment_manager_t * sm);
svm_msg_q_t *segment_manager_alloc_queue (fifo_segment_t * fs,