irmd: Add dynamic threadpool

This makes the IRMd add/remove worker threads dynamically.
IRMD_TPM_TIMEOUT sets a timer in the threadpool manager for checking
idle threads. Each time this timer expires, it will reduce the
threadpool by one.  IRMD_MIN_AV_THREADS is the minimum number of
available worker threads. If the number of active threads goes under
this threshold, the threadpool manager will create threads to get the
number of threads to IRMD_MAX_AV_THREADS, unless IRMD_MAX_THREADS is
reached.

1 files changed, 8 insertions, 3 deletions

diff --git a/include/ouroboros/config.h.in b/include/ouroboros/config.h.in
index 7616961c..067a2f85 100644
--- a/include/ouroboros/config.h.in
+++ b/include/ouroboros/config.h.in
@@ -35,7 +35,7 @@
 #define IPCP_SHIM_ETH_LLC_EXEC "@IPCP_SHIM_ETH_LLC_TARGET@"
 #define IPCP_NORMAL_EXEC       "@IPCP_NORMAL_TARGET@"
 #define IPCP_LOCAL_EXEC        "@IPCP_LOCAL_TARGET@"
-#define AP_MAX_FLOWS           256
+#define AP_MAX_FLOWS           2048
 #define AP_MAX_FQUEUES         64
 #define SHM_RDRB_BLOCK_SIZE    sysconf(_SC_PAGESIZE)
 #define SHM_RDRB_MULTI_BLOCK
@@ -47,14 +47,19 @@
 #define SHM_RBUFF_PREFIX       "/ouroboros.rbuff."
 #define SHM_FLOW_SET_PREFIX    "/ouroboros.sets."
 #define IRMD_MAX_FLOWS         4096
-#define IRMD_THREADPOOL_SIZE   16
+/* IRMD dynamic threadpooling */
+#define IRMD_MIN_AV_THREADS    16
+#define IRMD_MAX_AV_THREADS    64
+#define IRMD_MAX_THREADS       256
+
 #define IPCPD_THREADPOOL_SIZE  16
 #define IPCPD_MAX_CONNS        IRMD_MAX_FLOWS
 #define PTHREAD_COND_CLOCK     CLOCK_MONOTONIC
 #define PFT_SIZE               1 << 12
 /* Timeout values */
+#define IRMD_TPM_TIMEOUT       1000
 #define IRMD_ACCEPT_TIMEOUT    100
-#define IRMD_REQ_ARR_TIMEOUT   200
+#define IRMD_REQ_ARR_TIMEOUT   500
 #define IRMD_FLOW_TIMEOUT      5000
 #define IPCP_ACCEPT_TIMEOUT    100
 #define SOCKET_TIMEOUT         4000