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| author |   Felix Kuehling <Felix.Kuehling@amd.com> | 2019-06-20 15:37:37 -0400 |
|---|---|---|
| committer |   Alex Deucher <alexander.deucher@amd.com> | 2019-07-03 14:31:26 -0500 |
| commit | 819ec5acf7593bfb84063d1b3890e80b30e1c6fa (patch) | |
| tree | cea23a9f0647388b091b980ccfa92bc4343a4020 /drivers/gpu/drm/amd/amdkfd/kfd_packet_manager.c | |
| parent | drm/amdkfd: remove an unused variable (diff) | |
| download | linux-dev-819ec5acf7593bfb84063d1b3890e80b30e1c6fa.tar.xz linux-dev-819ec5acf7593bfb84063d1b3890e80b30e1c6fa.zip | |
drm/amdkfd: Print a warning when the runlist becomes oversubscribed
Oversubscription of queues or processes results in poor performance
mostly because HWS blinbly schedules busy and idle queues, resulting
in poor occupancy if many queues are idle.
Let users know with a warning message when transitioning from a
non-oversubscribed to an oversubscribed runlist.
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Oak Zeng <Oak.Zeng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdkfd/kfd_packet_manager.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_packet_manager.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_packet_manager.c b/drivers/gpu/drm/amd/amdkfd/kfd_packet_manager.c index c72c8f5fd54c..ccf6b2310316 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_packet_manager.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_packet_manager.c @@ -203,11 +203,15 @@ static int pm_create_runlist_ib(struct packet_manager *pm, pr_debug("Finished map process and queues to runlist\n"); - if (is_over_subscription) + if (is_over_subscription) { + if (!pm->is_over_subscription) + pr_warn("Runlist is getting oversubscribed. Expect reduced ROCm performance.\n"); retval = pm->pmf->runlist(pm, &rl_buffer[rl_wptr], *rl_gpu_addr, alloc_size_bytes / sizeof(uint32_t), true); + } + pm->is_over_subscription = is_over_subscription; for (i = 0; i < alloc_size_bytes / sizeof(uint32_t); i++) pr_debug("0x%2X ", rl_buffer[i]); |