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| author | Monk Liu <Monk.Liu@amd.com> | 2020-07-27 15:20:12 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-08-04 17:27:29 -0400 |
| commit | a300de40f66b87fa90703c94ffb22917f98eb902 (patch) | |
| tree | e1690029e39055ed5af5896a15ede13c51eba6a0 /drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | |
| parent | 9b856defbe355f886f99777e667506841bd267a8 (diff) | |
| download | lwn-a300de40f66b87fa90703c94ffb22917f98eb902.tar.gz lwn-a300de40f66b87fa90703c94ffb22917f98eb902.zip | |
drm/amdgpu: introduce a new parameter to configure how many KCQ we want(v5)
what:
the MQD's save and restore of KCQ (kernel compute queue)
cost lots of clocks during world switch which impacts a lot
to multi-VF performance
how:
introduce a paramter to control the number of KCQ to avoid
performance drop if there is no kernel compute queue needed
notes:
this paramter only affects gfx 8/9/10
v2:
refine namings
v3:
choose queues for each ring to that try best to cross pipes evenly.
v4:
fix indentation
some cleanupsin the gfx_compute_queue_acquire()
v5:
further fix on indentations
more cleanupsin gfx_compute_queue_acquire()
TODO:
in the future we will let hypervisor driver to set this paramter
automatically thus no need for user to configure it through
modprobe in virtual machine
Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index dc47549641e2..6d66705a1141 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -150,6 +150,7 @@ int amdgpu_noretry; int amdgpu_force_asic_type = -1; int amdgpu_tmz = 0; int amdgpu_reset_method = -1; /* auto */ +int amdgpu_num_kcq = -1; struct amdgpu_mgpu_info mgpu_info = { .mutex = __MUTEX_INITIALIZER(mgpu_info.mutex), @@ -776,6 +777,9 @@ module_param_named(reset_method, amdgpu_reset_method, int, 0444); MODULE_PARM_DESC(bad_page_threshold, "Bad page threshold(-1 = auto(default value), 0 = disable bad page retirement)"); module_param_named(bad_page_threshold, amdgpu_bad_page_threshold, int, 0444); +MODULE_PARM_DESC(num_kcq, "number of kernel compute queue user want to setup (8 if set to greater than 8 or less than 0, only affect gfx 8+)"); +module_param_named(num_kcq, amdgpu_num_kcq, int, 0444); + static const struct pci_device_id pciidlist[] = { #ifdef CONFIG_DRM_AMDGPU_SI {0x1002, 0x6780, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_TAHITI}, |