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anv: Add ANV_QUEUE_OVERRIDE env-var to override advertised queues

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Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8771>
This commit is contained in:
Jordan Justen 2021-01-25 12:33:19 -08:00 • committed by Marge Bot
parent 1326e1c0fe
commit 89580073f3
1 changed files with 60 additions and 0 deletions
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60
src/intel/vulkan/anv_device.c
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@ -477,6 +477,64 @@ anv_physical_device_free_disk_cache(struct anv_physical_device *device)
#endif
}
/* The ANV_QUEUE_OVERRIDE environment variable is a comma separated list of
* queue overrides.
*
* To override the number queues:
* * "gc" is for graphics queues with compute support
* * "g" is for graphics queues with no compute support
* * "c" is for compute queues with no graphics support
*
* For example, ANV_QUEUE_OVERRIDE=gc=2,c=1 would override the number of
* advertised queues to be 2 queues with graphics+compute support, and 1 queue
* with compute-only support.
*
* ANV_QUEUE_OVERRIDE=c=1 would override the number of advertised queues to
* include 1 queue with compute-only support, but it will not change the
* number of graphics+compute queues.
*
* ANV_QUEUE_OVERRIDE=gc=0,c=1 would override the number of advertised queues
* to include 1 queue with compute-only support, and it would override the
* number of graphics+compute queues to be 0.
*/
static void
anv_override_engine_counts(int *gc_count, int *g_count, int *c_count)
{
int gc_override = -1;
int g_override = -1;
int c_override = -1;
char *env = getenv("ANV_QUEUE_OVERRIDE");
if (env == NULL)
return;
env = strdup(env);
char *save = NULL;
char *next = strtok_r(env, ",", &save);
while (next != NULL) {
if (strncmp(next, "gc=", 3) == 0) {
gc_override = strtol(next + 3, NULL, 0);
} else if (strncmp(next, "g=", 2) == 0) {
g_override = strtol(next + 2, NULL, 0);
} else if (strncmp(next, "c=", 2) == 0) {
c_override = strtol(next + 2, NULL, 0);
} else {
mesa_logw("Ignoring unsupported ANV_QUEUE_OVERRIDE token: %s", next);
}
next = strtok_r(NULL, ",", &save);
}
free(env);
if (gc_override >= 0)
*gc_count = gc_override;
if (g_override >= 0)
*g_count = g_override;
if (*g_count > 0 && *gc_count <= 0 && (gc_override >= 0 || g_override >= 0))
mesa_logw("ANV_QUEUE_OVERRIDE: gc=0 with g > 0 violates the "
"Vulkan specification");
if (c_override >= 0)
*c_count = c_override;
}
static void
anv_physical_device_init_queue_families(struct anv_physical_device *pdevice)
{
@ -488,6 +546,8 @@ anv_physical_device_init_queue_families(struct anv_physical_device *pdevice)
int g_count = 0;
int c_count = 0;
anv_override_engine_counts(&gc_count, &g_count, &c_count);
if (gc_count > 0) {
pdevice->queue.families[family_count++] = (struct anv_queue_family) {
.queueFlags = VK_QUEUE_GRAPHICS_BIT |