mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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74ef9527bd
Before, every time fdinfo is queried we try to lock all the BOs in the VM and calculate memory usage from scratch. This works okay if the fdinfo is rarely read and the VMs don't have a ton of BOs. If either of these conditions is not true, we get a massive performance hit. In this new revision, we track the BOs as they change states. This way when the fdinfo is queried we only need to take the status lock and copy out the usage stats with minimal impact to the runtime performance. With this new approach however, we would no longer be able to track active buffers. Signed-off-by: Yunxiang Li <Yunxiang.Li@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Link: https://patchwork.freedesktop.org/patch/msgid/20241219151411.1150-6-Yunxiang.Li@amd.com Signed-off-by: Christian König <christian.koenig@amd.com>
124 lines
3.9 KiB
C
124 lines
3.9 KiB
C
// SPDX-License-Identifier: MIT
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/* Copyright 2021 Advanced Micro Devices, Inc.
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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 shall be included in
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* all copies or substantial portions of the 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: David Nieto
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* Roy Sun
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*/
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#include <linux/debugfs.h>
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#include <linux/list.h>
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#include <linux/module.h>
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#include <linux/uaccess.h>
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#include <linux/reboot.h>
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#include <linux/syscalls.h>
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#include <drm/amdgpu_drm.h>
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#include <drm/drm_debugfs.h>
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#include <drm/drm_drv.h>
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#include <drm/drm_file.h>
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#include "amdgpu.h"
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#include "amdgpu_vm.h"
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#include "amdgpu_gem.h"
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#include "amdgpu_ctx.h"
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#include "amdgpu_fdinfo.h"
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static const char *amdgpu_ip_name[AMDGPU_HW_IP_NUM] = {
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[AMDGPU_HW_IP_GFX] = "gfx",
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[AMDGPU_HW_IP_COMPUTE] = "compute",
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[AMDGPU_HW_IP_DMA] = "dma",
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[AMDGPU_HW_IP_UVD] = "dec",
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[AMDGPU_HW_IP_VCE] = "enc",
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[AMDGPU_HW_IP_UVD_ENC] = "enc_1",
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[AMDGPU_HW_IP_VCN_DEC] = "dec",
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[AMDGPU_HW_IP_VCN_ENC] = "enc",
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[AMDGPU_HW_IP_VCN_JPEG] = "jpeg",
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[AMDGPU_HW_IP_VPE] = "vpe",
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};
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void amdgpu_show_fdinfo(struct drm_printer *p, struct drm_file *file)
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{
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struct amdgpu_fpriv *fpriv = file->driver_priv;
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struct amdgpu_vm *vm = &fpriv->vm;
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struct amdgpu_mem_stats stats[__AMDGPU_PL_NUM];
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ktime_t usage[AMDGPU_HW_IP_NUM];
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const char *pl_name[] = {
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[TTM_PL_VRAM] = "vram",
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[TTM_PL_TT] = "gtt",
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[TTM_PL_SYSTEM] = "cpu",
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[AMDGPU_PL_GDS] = "gds",
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[AMDGPU_PL_GWS] = "gws",
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[AMDGPU_PL_OA] = "oa",
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[AMDGPU_PL_DOORBELL] = "doorbell",
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};
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unsigned int hw_ip, i;
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amdgpu_vm_get_memory(vm, stats);
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amdgpu_ctx_mgr_usage(&fpriv->ctx_mgr, usage);
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/*
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* ******************************************************************
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* For text output format description please see drm-usage-stats.rst!
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* ******************************************************************
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*/
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drm_printf(p, "pasid:\t%u\n", fpriv->vm.pasid);
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for (i = 0; i < ARRAY_SIZE(pl_name); i++) {
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if (!pl_name[i])
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continue;
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drm_print_memory_stats(p,
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&stats[i].drm,
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DRM_GEM_OBJECT_RESIDENT |
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DRM_GEM_OBJECT_PURGEABLE,
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pl_name[i]);
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}
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/* Legacy amdgpu keys, alias to drm-resident-memory-: */
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drm_printf(p, "drm-memory-vram:\t%llu KiB\n",
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stats[TTM_PL_VRAM].drm.resident/1024UL);
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drm_printf(p, "drm-memory-gtt: \t%llu KiB\n",
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stats[TTM_PL_TT].drm.resident/1024UL);
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drm_printf(p, "drm-memory-cpu: \t%llu KiB\n",
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stats[TTM_PL_SYSTEM].drm.resident/1024UL);
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/* Amdgpu specific memory accounting keys: */
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drm_printf(p, "amd-evicted-vram:\t%llu KiB\n",
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stats[TTM_PL_VRAM].evicted/1024UL);
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drm_printf(p, "amd-requested-vram:\t%llu KiB\n",
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(stats[TTM_PL_VRAM].drm.shared +
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stats[TTM_PL_VRAM].drm.private) / 1024UL);
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drm_printf(p, "amd-requested-gtt:\t%llu KiB\n",
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(stats[TTM_PL_TT].drm.shared +
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stats[TTM_PL_TT].drm.private) / 1024UL);
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for (hw_ip = 0; hw_ip < AMDGPU_HW_IP_NUM; ++hw_ip) {
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if (!usage[hw_ip])
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continue;
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drm_printf(p, "drm-engine-%s:\t%lld ns\n", amdgpu_ip_name[hw_ip],
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ktime_to_ns(usage[hw_ip]));
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}
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}
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