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Update open file limit on linux for applications (#4878)

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* Programmatically update the ulimit for open files if the current limit is not enough

Signed-off-by: Steve Pham <spham@amazon.com>
This commit is contained in:
Steve Pham
2021-10-21 12:40:10 -07:00
committed by GitHub
parent 7316802941
commit 244878483a
1 changed files with 18 additions and 0 deletions
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Code/Framework/AzFramework/Platform/Linux/AzFramework/Application/Application_Linux.cpp
+18
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@@ -7,17 +7,35 @@
*/
#include <AzFramework/Application/Application.h>
#include <sys/resource.h>
#if PAL_TRAIT_LINUX_WINDOW_MANAGER_XCB
#include <AzFramework/XcbApplication.h>
#endif
constexpr rlim_t g_minimumOpenFileHandles = 65536L;
////////////////////////////////////////////////////////////////////////////////////////////////////
namespace AzFramework
{
////////////////////////////////////////////////////////////////////////////////////////////////
Application::Implementation* Application::Implementation::Create()
{
// The default open file limit for processes may not be enough for O3DE applications.
// We will need to increase to the recommended value if the current open file limit
// is not sufficient.
rlimit currentLimit;
int get_limit_result = getrlimit(RLIMIT_NOFILE, &currentLimit);
AZ_Warning("Application", get_limit_result == 0, "Unable to read current ulimit open file limits");
if ((get_limit_result == 0) && (currentLimit.rlim_cur < g_minimumOpenFileHandles || currentLimit.rlim_max < g_minimumOpenFileHandles))
{
rlimit newLimit;
newLimit.rlim_cur = g_minimumOpenFileHandles; // Soft Limit
newLimit.rlim_max = g_minimumOpenFileHandles; // Hard Limit
[[maybe_unused]] int set_limit_result = setrlimit(RLIMIT_NOFILE, &newLimit);
AZ_Assert(set_limit_result == 0, "Unable to update open file limits");
}
#if PAL_TRAIT_LINUX_WINDOW_MANAGER_XCB
return aznew XcbApplication();
#elif PAL_TRAIT_LINUX_WINDOW_MANAGER_WAYLAND