Try to keep the memory usage low more aggressively

[software/dgc/cdgc.git] / rt / gc / cdgc / opts.d

diff --git a/rt/gc/cdgc/opts.d b/rt/gc/cdgc/opts.d
index 728119fdd9bc88dae6a9fade30f37a77fbf98343..5f93cd039941314927806c8fb19e2eeb3a0230ba 100644 (file)
--- a/rt/gc/cdgc/opts.d
+++ b/rt/gc/cdgc/opts.d
@@ -35,6 +35,7 @@ module rt.gc.cdgc.opts;
 
 import cstdlib = tango.stdc.stdlib;
 import cstring = tango.stdc.string;
+import cerrno = tango.stdc.errno;
 
 
 private:
@@ -53,6 +54,9 @@ struct Options
     bool mem_stomp = false;
     bool conservative = false;
     bool fork = true;
+    bool eager_alloc = true;
+    size_t prealloc_psize = 0;
+    size_t prealloc_npools = 0;
 }
 
 package Options options;
@@ -72,6 +76,31 @@ bool parse_bool(char* value)
 }
 
 
+void parse_prealloc(char* value)
+{
+    char* end;
+    cerrno.errno = 0;
+    long size = cstdlib.strtol(value, &end, 10);
+    if (end == value || cerrno.errno) // error parsing
+        return;
+    size *= 1024 * 1024; // size is supposed to be in MiB
+    long npools = 1;
+    if (*end == 'x') { // number of pools specified
+        char* start = end + 1;
+        npools = cstdlib.strtol(start, &end, 10);
+        if (*end != '\0' || end == start || cerrno.errno) // error parsing
+            return;
+    }
+    else if (*end != '\0') { // don't accept trailing garbage
+        return;
+    }
+    if (size > 0 && npools > 0) {
+        options.prealloc_psize = size;
+        options.prealloc_npools = npools;
+    }
+}
+
+
 void process_option(char* opt_name, char* opt_value)
 {
     if (cstr_eq(opt_name, "verbose"))
@@ -88,8 +117,12 @@ void process_option(char* opt_name, char* opt_value)
         options.mem_stomp = parse_bool(opt_value);
     else if (cstr_eq(opt_name, "conservative"))
         options.conservative = parse_bool(opt_value);
-    else if (cstr_eq(opt_name, "no_fork"))
-        options.fork = !parse_bool(opt_value);
+    else if (cstr_eq(opt_name, "fork"))
+        options.fork = parse_bool(opt_value);
+    else if (cstr_eq(opt_name, "eager_alloc"))
+        options.eager_alloc = parse_bool(opt_value);
+    else if (cstr_eq(opt_name, "pre_alloc"))
+        parse_prealloc(opt_value);
 }
 
 
@@ -149,6 +182,9 @@ unittest
         assert (mem_stomp == false);
         assert (conservative == false);
         assert (fork == true);
+        assert (eager_alloc == true);
+        assert (prealloc_psize == 0);
+        assert (prealloc_npools == 0);
     }
     parse("mem_stomp");
     with (options) {
@@ -158,8 +194,11 @@ unittest
         assert (mem_stomp == true);
         assert (conservative == false);
         assert (fork == true);
+        assert (eager_alloc == true);
+        assert (prealloc_psize == 0);
+        assert (prealloc_npools == 0);
     }
-    parse("mem_stomp=0:verbose=2:conservative:no_fork=10");
+    parse("mem_stomp=0:verbose=2:conservative:fork=0:eager_alloc=0");
     with (options) {
         assert (verbose == 2);
         assert (log_file[0] == '\0');
@@ -167,6 +206,9 @@ unittest
         assert (mem_stomp == false);
         assert (conservative == true);
         assert (fork == false);
+        assert (eager_alloc == false);
+        assert (prealloc_psize == 0);
+        assert (prealloc_npools == 0);
     }
     parse("log_file=12345 67890:verbose=1:sentinel=4:mem_stomp=1");
     with (options) {
@@ -176,6 +218,117 @@ unittest
         assert (mem_stomp == true);
         assert (conservative == true);
         assert (fork == false);
+        assert (eager_alloc == false);
+        assert (prealloc_psize == 0);
+        assert (prealloc_npools == 0);
+    }
+    parse("pre_alloc");
+    with (options) {
+        assert (verbose == 1);
+        assert (cstring.strcmp(log_file.ptr, "12345 67890".ptr) == 0);
+        assert (sentinel == true);
+        assert (mem_stomp == true);
+        assert (conservative == true);
+        assert (fork == false);
+        assert (eager_alloc == false);
+        assert (prealloc_psize == 0);
+        assert (prealloc_npools == 0);
+    }
+    parse("pre_alloc=1");
+    with (options) {
+        assert (verbose == 1);
+        assert (cstring.strcmp(log_file.ptr, "12345 67890".ptr) == 0);
+        assert (sentinel == true);
+        assert (mem_stomp == true);
+        assert (conservative == true);
+        assert (fork == false);
+        assert (eager_alloc == false);
+        assert (prealloc_psize == 1 * 1024 * 1024);
+        assert (prealloc_npools == 1);
+    }
+    parse("pre_alloc=5a");
+    with (options) {
+        assert (verbose == 1);
+        assert (cstring.strcmp(log_file.ptr, "12345 67890".ptr) == 0);
+        assert (sentinel == true);
+        assert (mem_stomp == true);
+        assert (conservative == true);
+        assert (fork == false);
+        assert (eager_alloc == false);
+        assert (prealloc_psize == 1 * 1024 * 1024);
+        assert (prealloc_npools == 1);
+    }
+    parse("pre_alloc=5x");
+    with (options) {
+        assert (verbose == 1);
+        assert (cstring.strcmp(log_file.ptr, "12345 67890".ptr) == 0);
+        assert (sentinel == true);
+        assert (mem_stomp == true);
+        assert (conservative == true);
+        assert (fork == false);
+        assert (eager_alloc == false);
+        assert (prealloc_psize == 1 * 1024 * 1024);
+        assert (prealloc_npools == 1);
+    }
+    parse("pre_alloc=09x010");
+    with (options) {
+        assert (verbose == 1);
+        assert (cstring.strcmp(log_file.ptr, "12345 67890".ptr) == 0);
+        assert (sentinel == true);
+        assert (mem_stomp == true);
+        assert (conservative == true);
+        assert (fork == false);
+        assert (eager_alloc == false);
+        assert (prealloc_psize == 9 * 1024 * 1024);
+        assert (prealloc_npools == 10);
+    }
+    parse("pre_alloc=5x2");
+    with (options) {
+        assert (verbose == 1);
+        assert (cstring.strcmp(log_file.ptr, "12345 67890".ptr) == 0);
+        assert (sentinel == true);
+        assert (mem_stomp == true);
+        assert (conservative == true);
+        assert (fork == false);
+        assert (eager_alloc == false);
+        assert (prealloc_psize == 5 * 1024 * 1024);
+        assert (prealloc_npools == 2);
+    }
+    parse("pre_alloc=9x5x");
+    with (options) {
+        assert (verbose == 1);
+        assert (cstring.strcmp(log_file.ptr, "12345 67890".ptr) == 0);
+        assert (sentinel == true);
+        assert (mem_stomp == true);
+        assert (conservative == true);
+        assert (fork == false);
+        assert (eager_alloc == false);
+        assert (prealloc_psize == 5 * 1024 * 1024);
+        assert (prealloc_npools == 2);
+    }
+    parse("pre_alloc=9x-5");
+    with (options) {
+        assert (verbose == 1);
+        assert (cstring.strcmp(log_file.ptr, "12345 67890".ptr) == 0);
+        assert (sentinel == true);
+        assert (mem_stomp == true);
+        assert (conservative == true);
+        assert (fork == false);
+        assert (eager_alloc == false);
+        assert (prealloc_psize == 5 * 1024 * 1024);
+        assert (prealloc_npools == 2);
+    }
+    parse("pre_alloc=0x3x0x4");
+    with (options) {
+        assert (verbose == 1);
+        assert (cstring.strcmp(log_file.ptr, "12345 67890".ptr) == 0);
+        assert (sentinel == true);
+        assert (mem_stomp == true);
+        assert (conservative == true);
+        assert (fork == false);
+        assert (eager_alloc == false);
+        assert (prealloc_psize == 5 * 1024 * 1024);
+        assert (prealloc_npools == 2);
     }
     parse(null);
     with (options) {
@@ -185,6 +338,45 @@ unittest
         assert (mem_stomp == true);
         assert (conservative == true);
         assert (fork == false);
+        assert (eager_alloc == false);
+        assert (prealloc_psize == 5 * 1024 * 1024);
+        assert (prealloc_npools == 2);
+    }
+    parse("");
+    with (options) {
+        assert (verbose == 1);
+        assert (cstring.strcmp(log_file.ptr, "12345 67890".ptr) == 0);
+        assert (sentinel == true);
+        assert (mem_stomp == true);
+        assert (conservative == true);
+        assert (fork == false);
+        assert (eager_alloc == false);
+        assert (prealloc_psize == 5 * 1024 * 1024);
+        assert (prealloc_npools == 2);
+    }
+    parse(":");
+    with (options) {
+        assert (verbose == 1);
+        assert (cstring.strcmp(log_file.ptr, "12345 67890".ptr) == 0);
+        assert (sentinel == true);
+        assert (mem_stomp == true);
+        assert (conservative == true);
+        assert (fork == false);
+        assert (eager_alloc == false);
+        assert (prealloc_psize == 5 * 1024 * 1024);
+        assert (prealloc_npools == 2);
+    }
+    parse("::::");
+    with (options) {
+        assert (verbose == 1);
+        assert (cstring.strcmp(log_file.ptr, "12345 67890".ptr) == 0);
+        assert (sentinel == true);
+        assert (mem_stomp == true);
+        assert (conservative == true);
+        assert (fork == false);
+        assert (eager_alloc == false);
+        assert (prealloc_psize == 5 * 1024 * 1024);
+        assert (prealloc_npools == 2);
     }
 }