3a7a92aba8
If the preempted context takes too long to relinquish control, e.g. it is stuck inside a shader with arbitration disabled, evict that context with an engine reset. This ensures that preemptions are reasonably responsive, providing a tighter QoS for the more important context at the cost of flagging unresponsive contexts more frequently (i.e. instead of using an ~10s hangcheck, we now evict at ~100ms). The challenge of lies in picking a timeout that can be reasonably serviced by HW for typical workloads, balancing the existing clients against the needs for responsiveness. Note that coupled with timeslicing, this will lead to rapid GPU "hang" detection with multiple active contexts vying for GPU time. The forced preemption mechanism can be compiled out with ./scripts/config --set-val DRM_I915_PREEMPT_TIMEOUT 0 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20191023133108.21401-2-chris@chris-wilson.co.uk
96 lines
3.4 KiB
C
96 lines
3.4 KiB
C
/*
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* Copyright © 2015 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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*/
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#ifndef _I915_PARAMS_H_
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#define _I915_PARAMS_H_
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#include <linux/bitops.h>
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#include <linux/cache.h> /* for __read_mostly */
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struct drm_printer;
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#define ENABLE_GUC_SUBMISSION BIT(0)
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#define ENABLE_GUC_LOAD_HUC BIT(1)
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/*
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* Invoke param, a function-like macro, for each i915 param, with arguments:
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*
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* param(type, name, value)
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*
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* type: parameter type, one of {bool, int, unsigned int, char *}
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* name: name of the parameter
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* value: initial/default value of the parameter
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*/
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#define I915_PARAMS_FOR_EACH(param) \
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param(char *, vbt_firmware, NULL) \
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param(int, modeset, -1) \
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param(int, lvds_channel_mode, 0) \
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param(int, panel_use_ssc, -1) \
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param(int, vbt_sdvo_panel_type, -1) \
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param(int, enable_dc, -1) \
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param(int, enable_fbc, -1) \
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param(int, enable_psr, -1) \
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param(int, disable_power_well, -1) \
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param(int, enable_ips, 1) \
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param(int, invert_brightness, 0) \
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param(int, enable_guc, 0) \
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param(int, guc_log_level, -1) \
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param(char *, guc_firmware_path, NULL) \
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param(char *, huc_firmware_path, NULL) \
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param(char *, dmc_firmware_path, NULL) \
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param(int, mmio_debug, -IS_ENABLED(CONFIG_DRM_I915_DEBUG_MMIO)) \
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param(int, edp_vswing, 0) \
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param(int, reset, 3) \
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param(unsigned int, inject_load_failure, 0) \
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param(int, fastboot, -1) \
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param(int, enable_dpcd_backlight, 0) \
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param(char *, force_probe, CONFIG_DRM_I915_FORCE_PROBE) \
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/* leave bools at the end to not create holes */ \
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param(bool, alpha_support, IS_ENABLED(CONFIG_DRM_I915_ALPHA_SUPPORT)) \
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param(bool, enable_hangcheck, true) \
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param(bool, prefault_disable, false) \
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param(bool, load_detect_test, false) \
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param(bool, force_reset_modeset_test, false) \
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param(bool, error_capture, true) \
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param(bool, disable_display, false) \
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param(bool, verbose_state_checks, true) \
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param(bool, nuclear_pageflip, false) \
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param(bool, enable_dp_mst, true) \
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param(bool, enable_gvt, false)
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#define MEMBER(T, member, ...) T member;
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struct i915_params {
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I915_PARAMS_FOR_EACH(MEMBER);
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};
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#undef MEMBER
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extern struct i915_params i915_modparams __read_mostly;
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void i915_params_dump(const struct i915_params *params, struct drm_printer *p);
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void i915_params_copy(struct i915_params *dest, const struct i915_params *src);
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void i915_params_free(struct i915_params *params);
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#endif
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