FEX-Emu/fex-assorted-tests-bins
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Update reserve-address-space

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Stefanos Kornilios Misis Poiitidis 2022-05-14 18:22:19 +03:00
parent 667a30cbef
commit 8ce1c4b930
3 changed files with 14 additions and 4 deletions
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reserve-address-space
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2
src/build.sh
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@ -15,4 +15,4 @@ gcc signals-nested-2.cpp -g -o ../signals-nested-2 -lpthread
gcc smc-shmatdt.cpp -g -o ../smc-shmatdt gcc smc-shmatdt.cpp -g -o ../smc-shmatdt
gcc prot-growsdown.cpp -g -o ../prot-growsdown gcc prot-growsdown.cpp -g -o ../prot-growsdown
gcc memfd.cpp -g -o ../memfd gcc memfd.cpp -g -o ../memfd
gcc reserve-address-space.cpp -g -o ../reserve-address-space g++ reserve-address-space.cpp -g -o ../reserve-address-space

16
src/reserve-address-space.cpp
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@ -9,10 +9,13 @@
#ifndef PAGE_SIZE #ifndef PAGE_SIZE
#define PAGE_SIZE 4096 #define PAGE_SIZE 4096
#endif #endif
#include <chrono>
// Based on discussion in https://github.com/FEX-Emu/FEX/issues/1708 // Based on discussion in https://github.com/FEX-Emu/FEX/issues/1708
int main() { int main() {
auto start_time = std::chrono::high_resolution_clock::now();
size_t total_len = 0; size_t total_len = 0;
size_t alloc_len = 1ULL << 51; size_t alloc_len = 1ULL << 51;
while (alloc_len >= PAGE_SIZE) { while (alloc_len >= PAGE_SIZE) {
@ -23,8 +26,12 @@ int main() {
// No more free VM gaps of this size. // No more free VM gaps of this size.
if (result == MAP_FAILED) { if (result == MAP_FAILED) {
assert(errno == ENOMEM); if (errno != ENOMEM && errno != EPERM /* when len is too big ?*/) {
break; printf("Error, errno: %d\n", errno);
return -1;
} else {
break;
}
} }
total_len += alloc_len; total_len += alloc_len;
} }
@ -32,6 +39,9 @@ int main() {
// Halve the size and continue filling in gaps. // Halve the size and continue filling in gaps.
alloc_len >>= 1; alloc_len >>= 1;
} }
printf("done, allocated %ld\n", total_len);
std::chrono::duration<double, std::milli> duration = std::chrono::high_resolution_clock::now() - start_time;
printf("done, allocated %ld in %.3f ms\n", total_len, duration.count());
return 0; return 0;
} }