crypto: encrypt/decrypt queues sw_scheduler

Type: improvement

Previously multiple sw crypto scheduler queues per core design
caused unaverage frame processing rate for each async op ID –
the lower the op ID is the highly likely they are processed first.

For example, when a RX core is feeding both encryption and
decryption jobs of the same crypto algorithm to the queues at a
high rate, in the mean time the crypto cores have no enough
cycles to process all: the jobs in the decryption queue are less
likely being processed, causing packet drop.

To improve the situation this patch makes every core only owning
a two queues, one for encrypt operations and one for decrypt.
The queue is changed either after checking each core
or after founding a frame to process.
All crypto jobs with different algorithm are pushed to
thoses queues and are treated evenly.

In addition, the crypto async infra now uses unified dequeue handler,
one per engine. Only the active engine will be registered its
dequeue handler in crypto main.

Signed-off-by: DariuszX Kazimierski <dariuszx.kazimierski@intel.com>
Signed-off-by: PiotrX Kleski <piotrx.kleski@intel.com>
Signed-off-by: Fan Zhang <roy.fan.zhang@intel.com>
Signed-off-by: Jakub Wysocki <jakubx.wysocki@intel.com>
Change-Id: I517ee8e31633980de5e0dd4b05e1d5db5dea760e

1 files changed, 16 insertions, 2 deletions

diff --git a/src/plugins/crypto_sw_scheduler/crypto_sw_scheduler.h b/src/plugins/crypto_sw_scheduler/crypto_sw_scheduler.h
index 50dd6c11830..e74dfdd2c2a 100644
--- a/src/plugins/crypto_sw_scheduler/crypto_sw_scheduler.h
+++ b/src/plugins/crypto_sw_scheduler/crypto_sw_scheduler.h
@@ -21,18 +21,32 @@
 #define CRYPTO_SW_SCHEDULER_QUEUE_SIZE 64
 #define CRYPTO_SW_SCHEDULER_QUEUE_MASK (CRYPTO_SW_SCHEDULER_QUEUE_SIZE - 1)
 
+STATIC_ASSERT ((0 == (CRYPTO_SW_SCHEDULER_QUEUE_SIZE &
+		      (CRYPTO_SW_SCHEDULER_QUEUE_SIZE - 1))),
+	       "CRYPTO_SW_SCHEDULER_QUEUE_SIZE is not pow2");
+
+typedef enum crypto_sw_scheduler_queue_type_t_
+{
+  CRYPTO_SW_SCHED_QUEUE_TYPE_ENCRYPT = 0,
+  CRYPTO_SW_SCHED_QUEUE_TYPE_DECRYPT,
+  CRYPTO_SW_SCHED_QUEUE_N_TYPES
+} crypto_sw_scheduler_queue_type_t;
+
 typedef struct
 {
   CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
   u32 head;
   u32 tail;
-  vnet_crypto_async_frame_t *jobs[0];
+  vnet_crypto_async_frame_t **jobs;
 } crypto_sw_scheduler_queue_t;
 
 typedef struct
 {
   CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
-  crypto_sw_scheduler_queue_t *queues[VNET_CRYPTO_ASYNC_OP_N_IDS];
+  crypto_sw_scheduler_queue_t queue[CRYPTO_SW_SCHED_QUEUE_N_TYPES];
+  u32 last_serve_lcore_id;
+  u8 last_serve_encrypt;
+  u8 last_return_queue;
   vnet_crypto_op_t *crypto_ops;
   vnet_crypto_op_t *integ_ops;
   vnet_crypto_op_t *chained_crypto_ops;