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linux/drivers/gpu/drm/i915/gt
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Chris Wilson aff76ab795 drm/i915/gt: Limit frequency drop to RPe on parking 
We treat idling the GT (intel_rps_park) as a downclock event, and reduce
the frequency we intend to restart the GT with. Since the two workloads
are likely related (e.g. a compositor rendering every 16ms), we want to
carry the frequency and load information from across the idling.
However, we do also need to update the frequencies so that workloads
that run for less than 1ms are autotuned by RPS (otherwise we leave
compositors running at max clocks, draining excess power). Conversely,
if we try to run too slowly, the next workload has to run longer. Since
there is a hysteresis in the power graph, below a certain frequency
running a short workload for longer consumes more energy than running it
slightly higher for less time. The exact balance point is unknown
beforehand, but measurements with 30fps media playback indicate that RPe
is a better choice.

Reported-by: Edward Baker <edward.baker@intel.com>
Tested-by: Edward Baker <edward.baker@intel.com>
Fixes: 043cd2d14e ("drm/i915/gt: Leave rps->cur_freq on unpark")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Edward Baker <edward.baker@intel.com>
Cc: Andi Shyti <andi.shyti@intel.com>
Cc: Lyude Paul <lyude@redhat.com>
Cc: <stable@vger.kernel.org> # v5.8+
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201124183521.28623-1-chris@chris-wilson.co.uk
(cherry picked from commit f7ed83cc19)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2020-12-02 17:05:58 -08:00
..
selftests
shaders drm/i915: Include asm sources for {ivb, hsw}_clear_kernel.c 2020-06-29 11:29:12 +03:00
uc drm/i915: Make sure execbuffer always passes ww state to i915_vma_pin. 2020-09-07 14:31:13 +03:00
debugfs_engines.c drm/i915/gt: allow setting generic data pointer 2020-03-26 21:20:51 +00:00
debugfs_engines.h drm/i915/gt: Move pm debug files into a gt aware debugfs 2019-12-22 15:25:10 +00:00
debugfs_gt_pm.c drm/i915/gt: Move rps.enabled/active to flags 2020-04-30 00:57:35 +01:00
debugfs_gt_pm.h drm/i915/gt: Move pm debug files into a gt aware debugfs 2019-12-22 15:25:10 +00:00
debugfs_gt.c drm/i915: Move sseu debugfs under gt/ 2020-07-08 21:40:15 +01:00
debugfs_gt.h drm/i915/gt: allow setting generic data pointer 2020-03-26 21:20:51 +00:00
gen2_engine_cs.c drm/i915/gt: Flush gen3 relocs harder, again 2020-06-13 10:30:01 +01:00
gen2_engine_cs.h drm/i915/gt: Split low level gen2-7 CS emitters 2020-06-02 10:42:00 +01:00
gen6_engine_cs.c drm/i915/gt: Split low level gen2-7 CS emitters 2020-06-02 10:42:00 +01:00
gen6_engine_cs.h drm/i915/gt: Split low level gen2-7 CS emitters 2020-06-02 10:42:00 +01:00
gen6_ppgtt.c drm/i915/gt: Onion unwind for scratch page allocation failure 2020-10-21 08:32:25 -04:00
gen6_ppgtt.h drm/i915: Make sure execbuffer always passes ww state to i915_vma_pin. 2020-09-07 14:31:13 +03:00
gen6_renderstate.c
gen7_renderclear.c drm/i915: Release shortlived maps of longlived objects 2020-07-08 22:05:50 +01:00
gen7_renderclear.h drm/i915/gen7: Clear all EU/L3 residual contexts 2020-03-06 08:59:06 +00:00
gen7_renderstate.c
gen8_ppgtt.c drm/i915/gt: Onion unwind for scratch page allocation failure 2020-10-21 08:32:25 -04:00
gen8_ppgtt.h drm/i915/gtt: split up i915_gem_gtt 2020-01-07 19:27:36 +00:00
gen8_renderstate.c
gen9_renderstate.c
hsw_clear_kernel.c drm/i915/gen7: Clear all EU/L3 residual contexts 2020-03-06 08:59:06 +00:00
intel_breadcrumbs_types.h drm/i915/gt: Split the breadcrumb spinlock between global and contexts 2020-12-02 17:05:58 -08:00
intel_breadcrumbs.c drm/i915/gt: Split the breadcrumb spinlock between global and contexts 2020-12-02 17:05:58 -08:00
intel_breadcrumbs.h drm/i915/gt: Distinguish the virtual breadcrumbs from the irq breadcrumbs 2020-09-07 14:23:55 +03:00
intel_context_param.c drm/i915: Allow userspace to specify ringsize on construction 2020-02-25 19:23:19 +00:00
intel_context_param.h drm/i915: Allow userspace to specify ringsize on construction 2020-02-25 19:23:19 +00:00
intel_context_sseu.c drm/i915/sseu: Move sseu_info under gt_info 2020-07-08 21:13:09 +01:00
intel_context_types.h drm/i915/gt: Split the breadcrumb spinlock between global and contexts 2020-12-02 17:05:58 -08:00
intel_context.c drm/i915/gt: Split the breadcrumb spinlock between global and contexts 2020-12-02 17:05:58 -08:00
intel_context.h drm/i915: Make sure execbuffer always passes ww state to i915_vma_pin. 2020-09-07 14:31:13 +03:00
intel_engine_cs.c drm/i915: Correctly set SFC capability for video engines 2020-11-12 19:47:30 -05:00
intel_engine_heartbeat.c drm/i915/gt: Always send a pulse down the engine after disabling heartbeat 2020-09-30 14:24:48 -04:00
intel_engine_heartbeat.h
intel_engine_pm.c drm/i915/gt: Distinguish the virtual breadcrumbs from the irq breadcrumbs 2020-09-07 14:23:55 +03:00
intel_engine_pm.h drm/i915: Extend intel_wakeref to support delayed puts 2020-03-23 12:51:05 +00:00
intel_engine_types.h drm/i915/gt: Widen CSB pointer to u64 for the parsers 2020-10-19 14:31:59 -04:00
intel_engine_user.c drm/i915: Reboot CI if we get wedged during driver init 2020-07-06 19:21:07 +01:00
intel_engine_user.h
intel_engine.h drm/i915/gt: Expose more parameters for emitting writes into the ring 2020-11-03 19:21:42 -05:00
intel_ggtt_fencing.c drm/i915/gt: Make fence revocation unequivocal 2020-04-01 23:34:17 +01:00
intel_ggtt_fencing.h drm/i915/gt: Store the fence details on the fence 2020-04-01 23:34:16 +01:00
intel_ggtt.c Merge tag 'drm-intel-gt-next-2020-09-07' of git://anongit.freedesktop.org/drm/drm-intel into drm-next 2020-09-09 07:55:22 +10:00
intel_gpu_commands.h drm/i915/gen12: Fix HDC pipeline flush 2020-05-07 07:44:41 +01:00
intel_gt_buffer_pool_types.h drm/i915/gt: Delay taking the spinlock for grabbing from the buffer pool 2020-09-07 13:14:07 +03:00
intel_gt_buffer_pool.c drm/i915/gt: Clear the buffer pool age before use 2020-09-30 14:24:23 -04:00
intel_gt_buffer_pool.h drm/i915/gt: Move the batch buffer pool from the engine to the gt 2020-04-30 19:12:02 +01:00
intel_gt_clock_utils.c drm/i915/gt: Fix up clock frequency 2020-04-27 17:34:33 +01:00
intel_gt_clock_utils.h drm/i915/gt: Use the RPM config register to determine clk frequencies 2020-04-24 19:10:17 +01:00
intel_gt_irq.c drm/i915/gt: Distinguish the virtual breadcrumbs from the irq breadcrumbs 2020-09-07 14:23:55 +03:00
intel_gt_irq.h drm/i915/gt: Reorganise gen8+ interrupt handler 2020-01-28 12:30:00 +00:00
intel_gt_pm_irq.c
intel_gt_pm_irq.h
intel_gt_pm.c drm/i915: Reboot CI if we get wedged during driver init 2020-07-06 19:21:07 +01:00
intel_gt_pm.h drm/i915/gt: Apply sanitiization just before resume 2019-12-26 12:37:30 +00:00
intel_gt_requests.c drm/i915/gem: Unpin idle contexts from kswapd reclaim 2020-07-08 22:05:49 +01:00
intel_gt_requests.h
intel_gt_types.h drm/i915/sseu: Move sseu_info under gt_info 2020-07-08 21:13:09 +01:00
intel_gt.c drm/i915: Make sure execbuffer always passes ww state to i915_vma_pin. 2020-09-07 14:31:13 +03:00
intel_gt.h drm/i915: Introduce gt_init_mmio 2020-07-08 21:07:13 +01:00
intel_gtt.c drm/i915/gt: Switch to object allocations for page directories 2020-09-07 14:24:08 +03:00
intel_gtt.h drm/i915/gt: Shrink i915_page_directory's slab bucket 2020-09-07 14:24:23 +03:00
intel_llc_types.h
intel_llc.c drm/i915/gt: Do not attempt to reprogram IA/ring frequencies for dgfx 2020-02-19 22:27:10 +00:00
intel_llc.h
intel_lrc_reg.h drm/i915/selftests: Add context batchbuffers registers to live_lrc_fixed 2020-04-24 00:36:13 +01:00
intel_lrc.c drm/i915/gt: Free stale request on destroying the virtual engine 2020-11-24 09:30:57 -08:00
intel_lrc.h drm/i915: Make define for lrc state offset 2020-04-24 00:52:14 +01:00
intel_mocs.c drm/i915/gt: Program mocs:63 for cache eviction on gen9 2020-11-30 16:31:30 -08:00
intel_mocs.h
intel_ppgtt.c drm/i915/gt: Shrink i915_page_directory's slab bucket 2020-09-07 14:24:23 +03:00
intel_rc6_types.h drm/i915/gt: Only ignore rc6 parking for PCU on byt/bsw 2019-12-12 08:35:48 +00:00
intel_rc6.c drm/i915/tgl: Fix Media power gate sequence. 2020-11-16 18:06:21 -05:00
intel_rc6.h
intel_renderstate.c drm/i915: Make sure execbuffer always passes ww state to i915_vma_pin. 2020-09-07 14:31:13 +03:00
intel_renderstate.h drm/i915: Use ww locking in intel_renderstate. 2020-09-07 14:30:31 +03:00
intel_reset_types.h drm/i915: Reboot CI if we get wedged during driver init 2020-07-06 19:21:07 +01:00
intel_reset.c drm/i915/gt: Distinguish the virtual breadcrumbs from the irq breadcrumbs 2020-09-07 14:23:55 +03:00
intel_reset.h drm/i915: Reboot CI if we get wedged during driver init 2020-07-06 19:21:07 +01:00
intel_ring_submission.c Merge tag 'drm-intel-gt-next-2020-09-07' of git://anongit.freedesktop.org/drm/drm-intel into drm-next 2020-09-09 07:55:22 +10:00
intel_ring_types.h drm/i915/gt: Avoid resetting ring->head outside of its timeline mutex 2020-02-11 12:03:22 +00:00
intel_ring.c drm/i915: Make sure execbuffer always passes ww state to i915_vma_pin. 2020-09-07 14:31:13 +03:00
intel_ring.h drm/i915: Make sure execbuffer always passes ww state to i915_vma_pin. 2020-09-07 14:31:13 +03:00
intel_rps_types.h drm/i915/gt: Switch to manual evaluation of RPS 2020-04-30 00:57:37 +01:00
intel_rps.c drm/i915/gt: Limit frequency drop to RPe on parking 2020-12-02 17:05:58 -08:00
intel_rps.h drm/i915/gt: Sanitize RPS interrupts upon resume 2020-05-03 08:24:36 +01:00
intel_sseu_debugfs.c drm/i915: Move sseu debugfs under gt/ 2020-07-08 21:40:15 +01:00
intel_sseu_debugfs.h drm/i915: Move sseu debugfs under gt/ 2020-07-08 21:40:15 +01:00
intel_sseu.c drm/i915/sseu: Move sseu_info under gt_info 2020-07-08 21:13:09 +01:00
intel_sseu.h drm/i915/sseu: Move sseu_info under gt_info 2020-07-08 21:13:09 +01:00
intel_timeline_types.h drm/i915/gt: Use the local HWSP offset during submission 2020-11-03 19:14:08 -05:00
intel_timeline.c drm/i915/gt: Use the local HWSP offset during submission 2020-11-03 19:14:08 -05:00
intel_timeline.h drm/i915: Make sure execbuffer always passes ww state to i915_vma_pin. 2020-09-07 14:31:13 +03:00
intel_workarounds_types.h drm/i915/gt: Skip rmw for masked registers 2020-02-01 09:21:57 +00:00
intel_workarounds.c drm/i915: Avoid memory leak with more than 16 workarounds on a list 2020-11-16 18:06:23 -05:00
intel_workarounds.h
ivb_clear_kernel.c drm/i915/gen7: Clear all EU/L3 residual contexts 2020-03-06 08:59:06 +00:00
mock_engine.c drm/i915: Make sure execbuffer always passes ww state to i915_vma_pin. 2020-09-07 14:31:13 +03:00
mock_engine.h
selftest_context.c drm/i915/selftests: Flush the active barriers before asserting 2020-09-07 13:14:15 +03:00
selftest_engine_cs.c drm/i915: Drop i915_request.i915 backpointer 2020-06-03 13:53:39 +01:00
selftest_engine_heartbeat.c drm/i915: Add a couple of missing i915_active_fini() 2020-08-17 16:16:34 -04:00
selftest_engine_heartbeat.h drm/i915/selftests: Enable selftesting of busy-stats 2020-06-18 09:26:53 +01:00
selftest_engine_pm.c drm/i915/gt: Always report the sample time for busy-stats 2020-06-18 09:26:54 +01:00
selftest_engine.c
selftest_engine.h
selftest_gt_pm.c drm/i915/selftests: Measure CS_TIMESTAMP 2020-05-21 09:30:16 +01:00
selftest_hangcheck.c drm/i915/selftests: Enable selftesting of busy-stats 2020-06-18 09:26:53 +01:00
selftest_llc.c drm/i915/gt: Do not attempt to reprogram IA/ring frequencies for dgfx 2020-02-19 22:27:10 +00:00
selftest_llc.h
selftest_lrc.c drm/i915/selftests: Fix locking inversion in lrc selftest. 2020-09-07 14:31:50 +03:00
selftest_mocs.c drm/i915/gt: Incrementally check for rewinding 2020-06-16 11:34:23 +03:00
selftest_rc6.c drm/i915: Print caller when tainting for CI 2020-07-06 19:21:07 +01:00
selftest_rc6.h
selftest_reset.c drm/i915: Exclude low pages (128KiB) of stolen from use 2020-10-21 08:32:28 -04:00
selftest_ring_submission.c drm/i915/selftests: Always flush before unpining after writing 2020-05-11 16:50:04 +01:00
selftest_ring.c drm/i915/gt: Incrementally check for rewinding 2020-06-16 11:34:23 +03:00
selftest_rps.c drm/i915: Move i915_vma_lock in the selftests to avoid lock inversion, v3. 2020-09-07 14:32:06 +03:00
selftest_rps.h drm/i915/gt: Fix up clock frequency 2020-04-27 17:34:33 +01:00
selftest_timeline.c drm/i915/selftest: Create mock_destroy_device 2020-09-21 10:36:24 +02:00
selftest_workarounds.c drm/i915: Add an implementation for i915_gem_ww_ctx locking, v2. 2020-09-07 14:29:44 +03:00
shmem_utils.c drm/i915/gt: Retain default context state across shrinking 2020-12-02 17:05:58 -08:00
shmem_utils.h drm/i915/gt: Keep a no-frills swappable copy of the default context state 2020-04-29 19:02:37 +01:00
st_shmem_utils.c drm/i915/gt: Keep a no-frills swappable copy of the default context state 2020-04-29 19:02:37 +01:00
sysfs_engines.c drm/i915: Show per-engine default property values in sysfs 2020-05-14 08:25:05 +01:00
sysfs_engines.h drm/i915/gt: Expose engine properties via sysfs 2020-02-28 22:03:19 +00:00