On Sun, Dec 01, 2019 at 03:22:01AM +1100, Jonathan Gray wrote:
> On Sun, Dec 01, 2019 at 02:21:49AM +1100, Jonathan Gray wrote:
> > map linux /proc/meminfo "MemAvailable" to uvm free pages
>
> On second thought HW_USERMEM64 may be a better fit here.
>
> "The amount of available non-kernel memory in bytes"
>
> Which ends up being physmem - uvmexp.wired (memory that can't be paged
> out) instead of the current amount of free memory.
Along the lines of this:
commit e9d96571d3670de169595c2009e7a49febd7cd2d
Author: Jonathan Gray <j...@jsg.id.au>
Date: Wed Nov 27 01:01:44 2019 +1100
anv: implement OpenBSD get_available_system_memory()
Determine a value for how much memory a process can allocate
without failing not exceeding amount of physical memory
available to userspace.
v2: use the smallest value of available non-kernel
physical memory and per process data size limit.
Signed-off-by: Jonathan Gray <j...@jsg.id.au>
diff --git a/src/intel/vulkan/anv_device.c b/src/intel/vulkan/anv_device.c
index 2a2041535c5..eddcf727f8a 100644
--- a/src/intel/vulkan/anv_device.c
+++ b/src/intel/vulkan/anv_device.c
@@ -28,6 +28,7 @@
#ifdef __OpenBSD__
#include <sys/types.h>
#include <sys/sysctl.h>
+#include <sys/resource.h>
#else
#include <sys/sysinfo.h>
#endif
@@ -369,6 +370,22 @@ anv_physical_device_free_disk_cache(struct
anv_physical_device *device)
static uint64_t
get_available_system_memory()
{
+#ifdef __OpenBSD__
+ struct rlimit rl;
+ int mib[] = { CTL_HW, HW_USERMEM64 };
+ int64_t mem_available;
+ size_t size = sizeof(mem_available);
+
+ /* physmem - wired */
+ if (sysctl(mib, 2, &mem_available, &size, NULL, 0) == -1)
+ return 0;
+
+ /* fixed login.conf limit */
+ if (getrlimit(RLIMIT_DATA, &rl) == -1)
+ return 0;
+
+ return MIN2(mem_available, rl.rlim_cur);
+#else
char *meminfo = os_read_file("/proc/meminfo");
if (!meminfo)
return 0;
@@ -387,6 +404,7 @@ get_available_system_memory()
free(meminfo);
return 0;
+#endif
}
static VkResult
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