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-rw-r--r--src/svm/fifo_segment.h64
1 files changed, 64 insertions, 0 deletions
diff --git a/src/svm/fifo_segment.h b/src/svm/fifo_segment.h
index 85548063972..4e950f6b4f0 100644
--- a/src/svm/fifo_segment.h
+++ b/src/svm/fifo_segment.h
@@ -39,6 +39,30 @@ typedef enum fifo_segment_flags_
FIFO_SEGMENT_F_MEM_LIMIT = 1 << 2,
} fifo_segment_flags_t;
+#define foreach_segment_mem_status \
+_(NO_PRESSURE, "No pressure") \
+_(LOW_PRESSURE, "Low pressure") \
+_(HIGH_PRESSURE, "High pressure") \
+_(NO_MEMORY, "No memory")
+
+typedef enum
+{
+#define _(sym,str) MEMORY_PRESSURE_##sym,
+ foreach_segment_mem_status
+#undef _
+ MEMORY_N_PRESSURE,
+} fifo_segment_mem_status_t;
+
+#if 0
+typedef enum fifo_segment_mem_status_
+{
+ MEMORY_PRESSURE_NO_PRESSURE,
+ MEMORY_PRESSURE_LOW_PRESSURE,
+ MEMORY_PRESSURE_HIGH_PRESSURE,
+ MEMORY_PRESSURE_NO_MEMORY,
+} fifo_segment_mem_status_t;
+#endif
+
typedef struct
{
ssvm_private_t ssvm; /**< ssvm segment data */
@@ -147,6 +171,31 @@ void fsh_collect_chunks (fifo_segment_header_t * fsh, u32 slice_index,
svm_fifo_chunk_t * cur);
/**
+ * Fifo segment has reached mem limit
+ *
+ * @param fsh fifo segment header
+ * @return 1 (if reached) or 0 (otherwise)
+ */
+u8 fsh_has_reached_mem_limit (fifo_segment_header_t * fsh);
+
+/**
+ * Fifo segment reset mem limit flag
+ *
+ * @param fs fifo segment
+ */
+void fsh_reset_mem_limit (fifo_segment_header_t * fsh);
+
+/**
+ * Fifo segment allocated size
+ *
+ * Returns fifo segment's allocated size
+ *
+ * @param fs fifo segment
+ * @return allocated size in bytes
+ */
+uword fifo_segment_size (fifo_segment_t * fs);
+
+/**
* Fifo segment estimate of number of free bytes
*
* Returns fifo segment's internal estimate of the number of free bytes.
@@ -169,6 +218,16 @@ uword fifo_segment_free_bytes (fifo_segment_t * fs);
void fifo_segment_update_free_bytes (fifo_segment_t * fs);
/**
+ * Fifo segment number of cached bytes
+ *
+ * Returns fifo segment's number of cached bytes.
+ *
+ * @param fs fifo segment
+ * @return cached bytes
+ */
+uword fifo_segment_cached_bytes (fifo_segment_t * fs);
+
+/**
* Number of bytes on chunk free lists
*
* @param fs fifo segment
@@ -189,6 +248,11 @@ u32 fifo_segment_num_free_fifos (fifo_segment_t * fs);
*/
u32 fifo_segment_num_free_chunks (fifo_segment_t * fs, u32 size);
+u8 fifo_segment_get_mem_usage (fifo_segment_t * fs);
+fifo_segment_mem_status_t fifo_segment_determine_status
+ (fifo_segment_header_t * fsh, u8 usage);
+fifo_segment_mem_status_t fifo_segment_get_mem_status (fifo_segment_t * fs);
+
void fifo_segment_main_init (fifo_segment_main_t * sm, u64 baseva,
u32 timeout_in_seconds);