Add option to play with the max number of files opened on each host at the same time

[simgrid.git] / src / simgrid / sg_config.cpp

diff --git a/src/simgrid/sg_config.cpp b/src/simgrid/sg_config.cpp
index 29a8cba..7cafc92 100644 (file)
--- a/src/simgrid/sg_config.cpp
+++ b/src/simgrid/sg_config.cpp
@@ -413,31 +413,40 @@ void sg_config_init(int *argc, char **argv)
     describe_model(description,descsize, surf_vm_model_description, "model", "The model to use for the vm");
     xbt_cfg_register_string("vm/model", "default", &_sg_cfg_cb__vm_model, description);
 
-    simgrid::config::bindFlag(sg_tcp_gamma = 4194304.0,
-      { "network/TCP-gamma", "network/TCP_gamma" },
+    sg_tcp_gamma = 4194304.0;
+    simgrid::config::bindFlag(sg_tcp_gamma, { "network/TCP-gamma", "network/TCP_gamma" },
       "Size of the biggest TCP window (cat /proc/sys/net/ipv4/tcp_[rw]mem for recv/send window; Use the last given value, which is the max window size)");
-    simgrid::config::bindFlag(sg_surf_precision = 0.00001,
-      "surf/precision",
+
+    sg_surf_precision = 0.00001;
+    simgrid::config::bindFlag(sg_surf_precision, "surf/precision",
       "Numerical precision used when updating simulation times (in seconds)");
-    simgrid::config::bindFlag(sg_maxmin_precision = 0.00001,
-      "maxmin/precision",
+
+    sg_maxmin_precision = 0.00001;
+    simgrid::config::bindFlag(sg_maxmin_precision, "maxmin/precision",
       "Numerical precision used when computing resource sharing (in ops/sec or bytes/sec)");
 
+    sg_concurrency_limit = 100;
+    simgrid::config::bindFlag(sg_concurrency_limit, "maxmin/concurrency_limit",
+      "Maximum number of concurrent variables in the maxmim system. Also limits the number of processes on each host, at higher level");
+
     /* The parameters of network models */
 
     // real default for "network/sender-gap" is set in network_smpi.cpp:
-    simgrid::config::bindFlag(sg_sender_gap = NAN,
-      { "network/sender-gap", "network/sender_gap" },
+    sg_sender_gap = NAN;
+    simgrid::config::bindFlag(sg_sender_gap, { "network/sender-gap", "network/sender_gap" },
       "Minimum gap between two overlapping sends");
-    simgrid::config::bindFlag(sg_latency_factor = 1.0,
-      { "network/latency-factor", "network/latency_factor" },
+
+    sg_latency_factor = 1.0;
+    simgrid::config::bindFlag(sg_latency_factor, { "network/latency-factor", "network/latency_factor" },
       "Correction factor to apply to the provided latency (default value set by network model)");
-    simgrid::config::bindFlag(sg_bandwidth_factor = 1.0,
-      { "network/bandwidth-factor", "network/bandwidth_factor" },
+
+    sg_bandwidth_factor = 1.0;
+    simgrid::config::bindFlag(sg_bandwidth_factor, { "network/bandwidth-factor", "network/bandwidth_factor" },
       "Correction factor to apply to the provided bandwidth (default value set by network model)");
+
     // real default for "network/weight-S" is set in network_*.cpp:
-    simgrid::config::bindFlag(sg_weight_S_parameter = NAN,
-      { "network/weight-S", "network/weight_S" },
+    sg_weight_S_parameter = NAN;
+    simgrid::config::bindFlag(sg_weight_S_parameter, { "network/weight-S", "network/weight_S" },
       "Correction factor to apply to the weight of competing streams (default value set by network model)");
 
     /* Inclusion path */
@@ -611,6 +620,14 @@ void sg_config_init(int *argc, char **argv)
     xbt_cfg_register_string("smpi/reduce",        nullptr, &_check_coll_reduce, "Which collective to use for reduce");
 #endif // HAVE_SMPI
 
+    /* Storage */
+
+    sg_storage_max_file_descriptors = 1024;
+    simgrid::config::bindFlag(sg_storage_max_file_descriptors, "storage/max_file_descriptors",
+      "Maximum number of concurrently opened files per host. Default is 1024");
+
+    /* Others */
+
     xbt_cfg_register_boolean("exception/cutpath", "no", nullptr,
         "Whether to cut all path information from call traces, used e.g. in exceptions.");