From de8b579efcb635e842da96f5a2ed2d098556c6c7 Mon Sep 17 00:00:00 2001
From: Richard Tucker <rit@harlequin.com>
Date: Tue, 19 Jan 1999 12:58:41 +0000
Subject: [PATCH] New unit

new test

Copied from Perforce
 Change: 20501
 ServerID: perforce.ravenbrook.com
---
 mps/qa/function/165.c | 111 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 111 insertions(+)
 create mode 100644 mps/qa/function/165.c

diff --git a/mps/qa/function/165.c b/mps/qa/function/165.c
new file mode 100644
index 00000000000..4bf53b92665
--- /dev/null
+++ b/mps/qa/function/165.c
@@ -0,0 +1,111 @@
+/* 
+TEST_HEADER
+ id = $HopeName: MMQA_test_function!131.c(trunk.3) $
+ summary = simple spare_commit_limit test
+ language = c
+ link = testlib.o rankfmt.o
+ harness = 2.0
+ parameters = EXTEND=65536 AVGSIZE=32 ALIGN=4 \
+              BIGSIZE=(5*1024*1024);
+OUTPUT_SPEC
+ reduce1 > 4000000
+ reduce2 <= 0
+ reduce3 > 4000000
+ completed = yes
+END_HEADER
+*/
+
+#include "testlib.h"
+#include "mpscmvff.h"
+#include "mpsavm.h"
+
+#define MVFF_HI_PARMS EXTEND,AVGSIZE,ALIGN,1,1,0
+#define MVFF_LO_PARMS EXTEND,AVGSIZE,ALIGN,0,0,1
+
+mps_arena_t arena;
+
+#define MAXOBJS (10000)
+
+mps_addr_t objs[MAXOBJS];
+mps_addr_t sizes[MAXOBJS];
+
+static void test(void)
+{
+ mps_pool_t poolhi, poollo;
+ mps_thr_t thread;
+
+ unsigned long com0, com1, com2;
+
+/* create a VM arena of 30MB */
+
+ cdie(mps_arena_create(&arena, mps_arena_class_vmnz(), (size_t) (1024*1024*40)),
+  "create arena");
+
+/* set the commit limit to 100MB, i.e. let the arena do the limiting */
+
+ mps_arena_commit_limit_set(arena, (size_t) (1024ul*1024ul*100ul));
+
+ cdie(mps_thread_reg(&thread, arena), "register thread");
+
+ cdie(
+  mps_pool_create(&poolhi, arena, mps_class_mvff(), MVFF_HI_PARMS),
+  "create high pool");
+
+ cdie(
+  mps_pool_create(&poollo, arena, mps_class_mvff(), MVFF_LO_PARMS),
+  "create low pool");
+
+/* Set the spare commit limit to 0MB */
+
+ mps_arena_spare_commit_limit_set(arena, (size_t) 0);
+ die(mps_alloc(&objs[0], poollo, BIGSIZE), "alloc");
+ com0 = mps_arena_committed(arena);
+ mps_free(poollo, objs[0], BIGSIZE);
+ com1 = mps_arena_committed(arena);
+
+/* the free should have reduced the total amount committed */
+ report("reduce1", "%ld", com0-com1);
+
+/* Try again but with arena hysteresis */
+
+/* nb. size_t unsigned, therefore (size_t)-1 is the maximum limit */
+ mps_arena_spare_commit_limit_set(arena, (size_t)-1);
+ die(mps_alloc(&objs[0], poollo, BIGSIZE), "alloc");
+ com0 = mps_arena_committed(arena);
+ mps_free(poollo, objs[0], BIGSIZE);
+ com1 = mps_arena_committed(arena);
+
+/* This time the free shouldn't make any difference */
+ report("reduce2", "%ld", com0-com1);
+
+/* Reducing the spare committed limit should return most of the spare */
+ mps_arena_spare_commit_limit_set(arena, (size_t)(1024*1024));
+ com2 = mps_arena_committed(arena);
+ report("reduce3", "%ld", com0-com2);
+ 
+
+ 
+
+
+
+ comment("Finishing off.");
+
+ mps_pool_destroy(poolhi);
+ mps_pool_destroy(poollo);
+ comment("Destroyed pool.");
+
+ mps_thread_dereg(thread);
+ comment("Deregistered thread.");
+
+ mps_arena_destroy(arena);
+ comment("Destroyed arena.");
+
+}
+
+int main(void)
+{
+ easy_tramp(test);
+ pass();
+ return 0;
+}
+