Structure repacking and sizing

src/core/iomgr/alarm.h

@@ -41,9 +41,9 @@
 typedef struct grpc_alarm {
   gpr_timespec deadline;
   gpr_uint32 heap_index; /* INVALID_HEAP_INDEX if not in heap */
+  int triggered;
   struct grpc_alarm *next;
   struct grpc_alarm *prev;
-  int triggered;
   grpc_iomgr_cb_func cb;
   void *cb_arg;
 } grpc_alarm;

src/core/surface/call.c

@@ -76,14 +76,14 @@ typedef struct {
 typedef struct {
   /* Overall status of the operation: starts OK, may degrade to
      non-OK */
-  int success;
-  /* Completion function to call at the end of the operation */
-  grpc_ioreq_completion_func on_complete;
-  void *user_data;
+  gpr_uint8 success;
   /* a bit mask of which request ops are needed (1u << opid) */
   gpr_uint16 need_mask;
   /* a bit mask of which request ops are now completed */
   gpr_uint16 complete_mask;
+  /* Completion function to call at the end of the operation */
+  grpc_ioreq_completion_func on_complete;
+  void *user_data;
 } reqinfo_master;
 
 /* Status data for a request can come from several sources; this

src/core/surface/call.h

@@ -78,8 +78,8 @@ typedef union {
 
 typedef struct {
   grpc_ioreq_op op;
-  grpc_ioreq_data data;
   gpr_uint32 flags; /**< A copy of the write flags from grpc_op */
+  grpc_ioreq_data data;
 } grpc_ioreq;
 
 typedef void (*grpc_ioreq_completion_func)(grpc_call *call, int success,

src/core/transport/stream_op.h

@@ -41,7 +41,7 @@
 #include "src/core/transport/metadata.h"
 
 /* this many stream ops are inlined into a sopb before allocating */
-#define GRPC_SOPB_INLINE_ELEMENTS 16
+#define GRPC_SOPB_INLINE_ELEMENTS 4
 
 /* Operations that can be performed on a stream.
    Used by grpc_stream_op. */