1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
|
/*
* Copyright © 2017 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include <errno.h>
#include <string.h>
#include <sys/ioctl.h>
#include "igt_core.h"
#include "ioctl_wrappers.h"
#include "i915/gem_scheduler.h"
#include "i915/gem_submission.h"
/**
* SECTION:gem_scheduler
* @short_description: Helpers for querying scheduler capabilities
* @title: GEM Scheduler
*
* This helper library contains functions used for getting information on
* currently used scheduling model.
*/
/**
* gem_scheduler_capability:
* @fd: open i915 drm file descriptor
*
* Returns: Scheduler capability bitmap.
*/
unsigned gem_scheduler_capability(int fd)
{
static int caps = -1;
if (caps < 0) {
struct drm_i915_getparam gp;
memset(&gp, 0, sizeof(gp));
gp.param = I915_PARAM_HAS_SCHEDULER;
gp.value = ∩︀
caps = 0;
ioctl(fd, DRM_IOCTL_I915_GETPARAM, &gp, sizeof(gp));
errno = 0;
}
return caps;
}
/**
* gem_scheduler_enabled:
* @fd: open i915 drm file descriptor
*
* Feature test macro to query whether the driver has scheduling capability.
*/
bool gem_scheduler_enabled(int fd)
{
return gem_scheduler_capability(fd) &
I915_SCHEDULER_CAP_ENABLED;
}
/**
* gem_scheduler_has_ctx_priority:
* @fd: open i915 drm file descriptor
*
* Feature test macro to query whether the driver supports assigning custom
* priorities to contexts from userspace.
*/
bool gem_scheduler_has_ctx_priority(int fd)
{
return gem_scheduler_capability(fd) &
I915_SCHEDULER_CAP_PRIORITY;
}
/**
* gem_scheduler_has_static_priority:
* @fd: open i915 drm file descriptor
*
* Feature test macro to query whether the driver supports priority assigned
* from user space are statically mapping into 3 buckets.
*/
bool gem_scheduler_has_static_priority(int fd)
{
return gem_scheduler_capability(fd) &
I915_SCHEDULER_CAP_STATIC_PRIORITY_MAP;
}
/**
* gem_scheduler_has_preemption:
* @fd: open i915 drm file descriptor
*
* Feature test macro to query whether the driver supports preempting active
* (currently executing on HW) workloads.
*/
bool gem_scheduler_has_preemption(int fd)
{
return gem_scheduler_capability(fd) &
I915_SCHEDULER_CAP_PREEMPTION;
}
/**
* gem_scheduler_has_semaphores:
* @fd: open i915 drm file descriptor
*
* Feature test macro to query whether the driver supports using HW semaphores
* to schedule dependencies in parallel (using the HW to delay execution until
* ready to reduce latency).
*/
bool gem_scheduler_has_semaphores(int fd)
{
return gem_scheduler_capability(fd) &
I915_SCHEDULER_CAP_SEMAPHORES;
}
/**
* gem_scheduler_has_engine_busy_stats:
* @fd: open i915 drm file descriptor
*
* Feature test macro to query whether the driver supports reporting accurate
* per-engine utilisation.
*/
bool gem_scheduler_has_engine_busy_stats(int fd)
{
return gem_scheduler_capability(fd) &
I915_SCHEDULER_CAP_ENGINE_BUSY_STATS;
}
/**
* gem_scheduler_has_timeslicing:
* @fd: open i915 drm file descriptor
*
* Feature test macro to query whether the driver supports using HW preemption
* to implement timeslicing of userspace batches. This allows userspace to
* implement micro-level scheduling within their own batches.
*/
bool gem_scheduler_has_timeslicing(int fd)
{
return (((gem_scheduler_capability(fd) &
(I915_SCHEDULER_CAP_PREEMPTION |
I915_SCHEDULER_CAP_SEMAPHORES)) ==
(I915_SCHEDULER_CAP_PREEMPTION |
I915_SCHEDULER_CAP_SEMAPHORES))
|| gem_using_guc_submission(fd));
}
/**
* gem_scheduler_print_capability:
* @fd: open i915 drm file descriptor
*
* Helper for pretty-printing scheduler capability.
*/
void gem_scheduler_print_capability(int fd)
{
unsigned caps = gem_scheduler_capability(fd);
if (!caps)
return;
igt_info("Has kernel scheduler\n");
if (caps & I915_SCHEDULER_CAP_PRIORITY)
igt_info(" - With priority sorting\n");
if (caps & I915_SCHEDULER_CAP_PREEMPTION)
igt_info(" - With preemption enabled\n");
if (caps & I915_SCHEDULER_CAP_SEMAPHORES)
igt_info(" - With HW semaphores enabled\n");
if (caps & I915_SCHEDULER_CAP_ENGINE_BUSY_STATS)
igt_info(" - With engine busy statistics\n");
if (gem_scheduler_has_timeslicing(fd))
igt_info(" - With timeslicing enabled\n");
}
|
