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v3dv: limit heap size to 4GB

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GPU addresses are 32-bit, so we can't address more than 4GB.

Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
Reviewed-by: Eric Engestrom <eric@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18483>
This commit is contained in:
Iago Toral Quiroga 2022-09-08 09:55:52 +02:00 • committed by Marge Bot
parent b5b3a1634f
commit 861fff6339
1 changed files with 9 additions and 7 deletions
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16
src/broadcom/vulkan/v3dv_device.c
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@ -355,16 +355,18 @@ compute_heap_size()
uint64_t total_ram = (uint64_t) v3d_simulator_get_mem_size();
#endif
/* We don't want to burn too much ram with the GPU. If the user has 4GiB
* or less, we use at most half. If they have more than 4GiB, we use 3/4.
/* We don't want to burn too much ram with the GPU. If the user has 4GB
* or less, we use at most half. If they have more than 4GB we limit it
* to 3/4 with a max. of 4GB since the GPU cannot address more than that.
*/
uint64_t available_ram;
if (total_ram <= 4ull * 1024ull * 1024ull * 1024ull)
available_ram = total_ram / 2;
const uint64_t MAX_HEAP_SIZE = 4ull * 1024ull * 1024ull * 1024ull;
uint64_t available;
if (total_ram <= MAX_HEAP_SIZE)
available = total_ram / 2;
else
available_ram = total_ram * 3 / 4;
available = MIN2(MAX_HEAP_SIZE, total_ram * 3 / 4);
return available_ram;
return available;
}
#if !using_v3d_simulator