-
Notifications
You must be signed in to change notification settings - Fork 97
/
p9_fbc_eff_config.C
524 lines (458 loc) · 21.2 KB
/
p9_fbc_eff_config.C
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
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/import/chips/p9/procedures/hwp/nest/p9_fbc_eff_config.C $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2016,2017 */
/* [+] International Business Machines Corp. */
/* */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); */
/* you may not use this file except in compliance with the License. */
/* You may obtain a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or */
/* implied. See the License for the specific language governing */
/* permissions and limitations under the License. */
/* */
/* IBM_PROLOG_END_TAG */
///
/// @file p9_fbc_eff_config.C
/// @brief Set fabric system-wide effective config attributes (FAPI2)
///
/// *HWP HWP Owner: Joe McGill <jmcgill@us.ibm.com>
/// *HWP FW Owner: Thi Tran <thi@us.ibm.com>
/// *HWP Team: Nest
/// *HWP Level: 3
/// *HWP Consumed by: HB
///
//------------------------------------------------------------------------------
// Includes
//------------------------------------------------------------------------------
#include <p9_fbc_eff_config.H>
//------------------------------------------------------------------------------
// Constant definitions
//------------------------------------------------------------------------------
//
// base epsilon table values
//
const uint32_t EPSILON_MIN_VALUE = 0x1;
const uint32_t EPSILON_MAX_VALUE = 0xFFFFFFFF;
const uint8_t NUM_EPSILON_READ_TIERS = 3;
const uint8_t NUM_EPSILON_WRITE_TIERS = 2;
// LE epsilon (2 chips per-group)
const uint32_t EPSILON_R_T0_LE[] = { 7, 7, 8, 8, 10, 22 };
const uint32_t EPSILON_R_T1_LE[] = { 7, 7, 8, 8, 10, 22 };
const uint32_t EPSILON_R_T2_LE[] = { 61, 63, 65, 68, 73, 97 };
const uint32_t EPSILON_W_T0_LE[] = { 0, 0, 0, 0, 0, 5 };
const uint32_t EPSILON_W_T1_LE[] = { 9, 10, 11, 13, 15, 27 };
// HE epsilon (4 chips per-group)
const uint32_t EPSILON_R_T0_HE[] = { 7, 7, 8, 8, 10, 22 };
const uint32_t EPSILON_R_T1_HE[] = { 77, 78, 81, 84, 89, 113 };
const uint32_t EPSILON_R_T2_HE[] = { 187, 189, 191, 194, 199, 223 };
const uint32_t EPSILON_W_T0_HE[] = { 12, 13, 14, 16, 18, 30 };
const uint32_t EPSILON_W_T1_HE[] = { 96, 97, 98, 99, 102, 114 };
// HE epsilon (flat 8 configuration)
const uint32_t EPSILON_R_T0_F8[] = { 7, 7, 8, 8, 10, 22 };
const uint32_t EPSILON_R_T1_F8[] = { 7, 7, 8, 8, 10, 22 };
const uint32_t EPSILON_R_T2_F8[] = { 145, 146, 149, 152, 157, 181 };
const uint32_t EPSILON_W_T0_F8[] = { 0, 0, 0, 0, 0, 5 };
const uint32_t EPSILON_W_T1_F8[] = { 73, 74, 75, 77, 79, 91 };
//------------------------------------------------------------------------------
// Function definitions
//------------------------------------------------------------------------------
///
/// @brief Utility function to apply positive/negative scaing factor
/// to base epsilon value
///
/// @param[in] i_gb_percentage Scaling factor (e.g. 20% = 20)
/// @param[in/out] io_target_value Target epsilon value, after application of
/// scaling factor
/// NOTE: scaling will be clamped to
/// minimum/maximum value
///
/// @return void.
///
void p9_fbc_eff_config_guardband_epsilon(
const uint8_t i_gb_percentage,
uint32_t& io_target_value)
{
FAPI_DBG("Start");
uint32_t l_delta = ((io_target_value * i_gb_percentage) / 100) +
(((io_target_value * i_gb_percentage) % 100) ? (1) : (0));
// Apply guardband
if (i_gb_percentage >= 0)
{
// Clamp to maximum value if necessary
if (l_delta > (EPSILON_MAX_VALUE - io_target_value))
{
FAPI_DBG("Guardband application generated out-of-range target value, clamping to maximum value!");
io_target_value = EPSILON_MAX_VALUE;
}
else
{
io_target_value += l_delta;
}
}
else
{
// Clamp to minimum value if necessary
if (l_delta >= io_target_value)
{
FAPI_DBG("Guardband application generated out-of-range target value, clamping to minimum value!");
io_target_value = EPSILON_MIN_VALUE;
}
else
{
io_target_value -= l_delta;
}
}
FAPI_DBG("End");
return;
}
///
/// @brief Calculate target epsilon settings to apply based on
/// system configuration
///
/// @param[in] i_target System target
/// @param[in] i_core_floor_ratio Fabric/core floor enum
/// @param[in] i_core_ceiling_ratio Fabric/core ceiling enum
/// @param[in] i_freq_fbc Absolute fabric frequency
/// @param[in] i_freq_core_ceiling Absolute core ceiling frequency
///
/// @return fapi2::ReturnCode. FAPI2_RC_SUCCESS if success, else error code.
///
fapi2::ReturnCode
p9_fbc_eff_config_calc_epsilons(
const fapi2::Target<fapi2::TARGET_TYPE_SYSTEM>& i_target,
const fapi2::ATTR_PROC_FABRIC_CORE_FLOOR_RATIO_Type i_core_floor_ratio,
const fapi2::ATTR_PROC_FABRIC_CORE_CEILING_RATIO_Type i_core_ceiling_ratio,
const fapi2::ATTR_FREQ_PB_MHZ_Type i_freq_fbc,
const fapi2::ATTR_FREQ_CORE_CEILING_MHZ_Type i_freq_core_ceiling)
{
FAPI_DBG("Start");
// epsilon output attributes
uint32_t l_eps_r[NUM_EPSILON_READ_TIERS];
uint32_t l_eps_w[NUM_EPSILON_WRITE_TIERS];
fapi2::ATTR_PROC_EPS_GB_PERCENTAGE_Type l_eps_gb;
// fetch epsilon table type/pump mode attributes
fapi2::ATTR_PROC_EPS_TABLE_TYPE_Type l_eps_table_type;
fapi2::ATTR_PROC_FABRIC_PUMP_MODE_Type l_pump_mode;
FAPI_TRY(FAPI_ATTR_GET(fapi2::ATTR_PROC_EPS_TABLE_TYPE, i_target, l_eps_table_type),
"Error from FAPI_ATTR_GET(ATTR_PROC_EPS_TABLE_TYPE)");
FAPI_TRY(FAPI_ATTR_GET(fapi2::ATTR_PROC_FABRIC_PUMP_MODE, i_target, l_pump_mode),
"Error from FAPI_ATTR_GET(ATTR_PROC_FABRIC_PUMP_MODE)");
switch(l_eps_table_type)
{
case fapi2::ENUM_ATTR_PROC_EPS_TABLE_TYPE_EPS_TYPE_HE:
if (l_pump_mode == fapi2::ENUM_ATTR_PROC_FABRIC_PUMP_MODE_CHIP_IS_NODE)
{
l_eps_r[0] = EPSILON_R_T0_HE[i_core_floor_ratio];
}
else
{
l_eps_r[0] = EPSILON_R_T1_HE[i_core_floor_ratio];
}
l_eps_r[1] = EPSILON_R_T1_HE[i_core_floor_ratio];
l_eps_r[2] = EPSILON_R_T2_HE[i_core_floor_ratio];
l_eps_w[0] = EPSILON_W_T0_HE[i_core_floor_ratio];
l_eps_w[1] = EPSILON_W_T1_HE[i_core_floor_ratio];
break;
case fapi2::ENUM_ATTR_PROC_EPS_TABLE_TYPE_EPS_TYPE_HE_F8:
if (l_pump_mode == fapi2::ENUM_ATTR_PROC_FABRIC_PUMP_MODE_CHIP_IS_NODE)
{
l_eps_r[0] = EPSILON_R_T0_F8[i_core_floor_ratio];
}
else
{
l_eps_r[0] = EPSILON_R_T1_F8[i_core_floor_ratio];
}
l_eps_r[1] = EPSILON_R_T1_F8[i_core_floor_ratio];
l_eps_r[2] = EPSILON_R_T2_F8[i_core_floor_ratio];
l_eps_w[0] = EPSILON_W_T0_F8[i_core_floor_ratio];
l_eps_w[1] = EPSILON_W_T1_F8[i_core_floor_ratio];
break;
case fapi2::ENUM_ATTR_PROC_EPS_TABLE_TYPE_EPS_TYPE_LE:
if (l_pump_mode == fapi2::ENUM_ATTR_PROC_FABRIC_PUMP_MODE_CHIP_IS_NODE)
{
l_eps_r[0] = EPSILON_R_T0_LE[i_core_floor_ratio];
}
else
{
l_eps_r[0] = EPSILON_R_T1_LE[i_core_floor_ratio];
}
l_eps_r[1] = EPSILON_R_T1_LE[i_core_floor_ratio];
l_eps_r[2] = EPSILON_R_T2_LE[i_core_floor_ratio];
l_eps_w[0] = EPSILON_W_T0_LE[i_core_floor_ratio];
l_eps_w[1] = EPSILON_W_T1_LE[i_core_floor_ratio];
break;
default:
FAPI_ASSERT(false,
fapi2::P9_FBC_EFF_CONFIG_EPSILON_INVALID_TABLE_TYPE_ERR()
.set_TABLE_TYPE(l_eps_table_type),
"Invalid epsilon table type 0x%.8X", l_eps_table_type);
break;
}
// dump base epsilon values
FAPI_DBG("Base epsilon values read from table:");
for (uint32_t ii = 0; ii < NUM_EPSILON_READ_TIERS; ii++)
{
FAPI_DBG(" R_T[%d] = %d", ii, l_eps_r[ii]);
}
for (uint32_t ii = 0; ii < NUM_EPSILON_WRITE_TIERS; ii++)
{
FAPI_DBG(" W_T[%d] = %d", ii, l_eps_w[ii]);
}
// set guardband default value to +20%
l_eps_gb = +20;
FAPI_TRY(FAPI_ATTR_SET(fapi2::ATTR_PROC_EPS_GB_PERCENTAGE, i_target, l_eps_gb),
"Error from FAPI_ATTR_SET (ATTR_PROC_EPS_GB_PERCENTAGE)");
// get gardband attribute
// Note: if a user makes an attribute override with CONST, it would
// override the above default value settings. This mechanism is to
// allow users to change the default settings for testing.
FAPI_TRY(FAPI_ATTR_GET(fapi2::ATTR_PROC_EPS_GB_PERCENTAGE, i_target, l_eps_gb),
"Error from FAPI_ATTR_GET (ATTR_PROC_EPS_GB_PERCENTAGE)");
FAPI_DBG("ATTR_PROC_EPS_GB_PERCENTAGE %s%d, ",
(l_eps_gb >= 0) ? ("+") : ("-"), l_eps_gb);
// scale base epsilon values if core is running 2x nest frequency
if (i_core_ceiling_ratio == fapi2::ENUM_ATTR_PROC_FABRIC_CORE_CEILING_RATIO_RATIO_8_8)
{
FAPI_DBG("Scaling based on ceiling frequency");
uint8_t l_scale_percentage =
100 *
i_freq_core_ceiling /
(2 * i_freq_fbc);
l_scale_percentage -= 100;
// scale/apply guardband read epsilons
for (uint32_t ii = 0; ii < NUM_EPSILON_READ_TIERS; ii++)
{
p9_fbc_eff_config_guardband_epsilon(l_scale_percentage, l_eps_r[ii]);
}
// Scale write epsilons
for (uint32_t ii = 0; ii < NUM_EPSILON_WRITE_TIERS; ii++)
{
p9_fbc_eff_config_guardband_epsilon(l_scale_percentage, l_eps_w[ii]);
}
}
// scale based on guardband, and output final values
FAPI_DBG("Scaled epsilon values based on %s%d percent guardband:",
(l_eps_gb >= 0) ? ("+") : ("-"),
l_eps_gb);
for (uint32_t ii = 0; ii < NUM_EPSILON_READ_TIERS; ii++)
{
p9_fbc_eff_config_guardband_epsilon(l_eps_gb, l_eps_r[ii]);
FAPI_DBG(" R_T[%d] = %d", ii, l_eps_r[ii]);
}
for (uint32_t ii = 0; ii < NUM_EPSILON_WRITE_TIERS; ii++)
{
p9_fbc_eff_config_guardband_epsilon(l_eps_gb, l_eps_w[ii]);
FAPI_DBG(" W_T[%d] = %d", ii, l_eps_w[ii]);
}
// check relationship of epsilon counters:
// read tier values are strictly increasing
// write tier values are strictly increaing
if ((l_eps_r[0] > l_eps_r[1]) ||
(l_eps_r[1] > l_eps_r[2]) ||
(l_eps_w[0] > l_eps_w[1]))
{
FAPI_ASSERT(false,
fapi2::P9_FBC_EFF_CONFIG_EPSILON_INVALID_TABLE_ERR()
.set_TABLE_TYPE(l_eps_table_type)
.set_EPS_GB_PERCENTAGE(l_eps_gb)
.set_PUMP_MODE(l_pump_mode)
.set_R_T0(l_eps_r[0])
.set_R_T1(l_eps_r[1])
.set_R_T2(l_eps_r[2])
.set_W_T0(l_eps_w[0])
.set_W_T1(l_eps_w[1]),
"Invalid relationship between base epsilon values");
}
// write attributes
FAPI_TRY(FAPI_ATTR_SET(fapi2::ATTR_PROC_EPS_READ_CYCLES_T0, i_target, l_eps_r[0]),
"Error from FAPI_ATTR_SET (ATTR_PROC_EPS_READ_CYCLES_T0)");
FAPI_TRY(FAPI_ATTR_SET(fapi2::ATTR_PROC_EPS_READ_CYCLES_T1, i_target, l_eps_r[1]),
"Error from FAPI_ATTR_SET (ATTR_PROC_EPS_READ_CYCLES_T1)");
FAPI_TRY(FAPI_ATTR_SET(fapi2::ATTR_PROC_EPS_READ_CYCLES_T2, i_target, l_eps_r[2]),
"Error from FAPI_ATTR_SET (ATTR_PROC_EPS_READ_CYCLES_T2)");
FAPI_TRY(FAPI_ATTR_SET(fapi2::ATTR_PROC_EPS_WRITE_CYCLES_T1, i_target, l_eps_w[0]),
"Error from FAPI_ATTR_SET (ATTR_PROC_EPS_WRITE_CYCLES_T1)");
FAPI_TRY(FAPI_ATTR_SET(fapi2::ATTR_PROC_EPS_WRITE_CYCLES_T2, i_target, l_eps_w[1]),
"Error from FAPI_ATTR_SET (ATTR_PROC_EPS_WRITE_CYCLES_T2)");
fapi_try_exit:
FAPI_INF("End");
return fapi2::current_err;
}
///
/// @brief Process fabric/core frequency attributes and generate
/// derived attributes to drive fabric configuration
///
/// @param[in] i_target System target
/// @param[in/out] io_core_floor_ratio Fabric/core floor enum
/// @param[in/out] io_core_ceiling_ratio Fabric/core ceiling enum
/// @param[in/out] io_freq_fbc Absolute fabric frequency
/// @param[in/out] io_freq_core_ceiling Absolute core ceiling frequency
///
/// @return fapi2::ReturnCode. FAPI2_RC_SUCCESS if success, else error code.
///
fapi2::ReturnCode
p9_fbc_eff_config_process_freq_attributes(
const fapi2::Target<fapi2::TARGET_TYPE_SYSTEM>& i_target,
fapi2::ATTR_PROC_FABRIC_CORE_FLOOR_RATIO_Type& io_core_floor_ratio,
fapi2::ATTR_PROC_FABRIC_CORE_CEILING_RATIO_Type& io_core_ceiling_ratio,
fapi2::ATTR_FREQ_PB_MHZ_Type& io_freq_fbc,
fapi2::ATTR_FREQ_CORE_CEILING_MHZ_Type& io_freq_core_ceiling)
{
FAPI_DBG("Start");
uint32_t l_freq_core_floor;
uint32_t l_freq_core_nom;
uint8_t l_async_safe_mode = fapi2::ENUM_ATTR_PROC_FABRIC_ASYNC_SAFE_MODE_PERFORMANCE_MODE;
// get core floor/nominal/ceiling frequency attributes
FAPI_TRY(FAPI_ATTR_GET(fapi2::ATTR_FREQ_CORE_FLOOR_MHZ, i_target, l_freq_core_floor),
"Error from FAPI_ATTR_GET (ATTR_FREQ_CORE_FLOOR_MHZ)");
FAPI_TRY(FAPI_ATTR_GET(fapi2::ATTR_FREQ_CORE_NOMINAL_MHZ, i_target, l_freq_core_nom),
"Error from FAPI_ATTR_GET (ATTR_FREQ_CORE_NOMINAL_MHZ)");
FAPI_TRY(FAPI_ATTR_GET(fapi2::ATTR_FREQ_CORE_CEILING_MHZ, i_target, io_freq_core_ceiling),
"Error from FAPI_ATTR_GET (ATTR_FREQ_CORE_CEILING_MHZ)");
// verify the floor/nominal/ceiling frequencies
// expect ceiling >= nominal, nominal >= floor
FAPI_ASSERT(((io_freq_core_ceiling >= l_freq_core_nom) &&
(l_freq_core_nom >= l_freq_core_floor)),
fapi2::P9_FBC_EFF_CONFIG_CORE_FREQ_RANGE_ERR()
.set_FREQ_CORE_CEILING(io_freq_core_ceiling)
.set_FREQ_CORE_NOM(l_freq_core_nom)
.set_FREQ_CORE_FLOOR(l_freq_core_floor),
"Invalid core frequency ranges: FLOOR: 0x%.8X, NOMINAL: 0x%.8X, CEILING: 0x%.8X",
l_freq_core_floor, l_freq_core_nom, io_freq_core_ceiling);
// calculate fabric/core frequency ratio attributes
FAPI_TRY(FAPI_ATTR_GET(fapi2::ATTR_FREQ_PB_MHZ, i_target, io_freq_fbc),
"Error from FAPI_ATTR_GET (ATTR_FREQ_PB_MHZ)");
// determine table index based on fabric/core floor frequency ratio
// breakpoint ratio: core floor 4.0, pb 2.0 (cache floor :: pb = 8/8)
if ((l_freq_core_floor) >= (2 * io_freq_fbc))
{
io_core_floor_ratio = fapi2::ENUM_ATTR_PROC_FABRIC_CORE_FLOOR_RATIO_RATIO_8_8;
}
// breakpoint ratio: core floor 3.5, pb 2.0 (cache floor :: pb = 7/8)
else if ((4 * l_freq_core_floor) >= (7 * io_freq_fbc))
{
io_core_floor_ratio = fapi2::ENUM_ATTR_PROC_FABRIC_CORE_FLOOR_RATIO_RATIO_7_8;
}
// breakpoint ratio: core floor 3.0, pb 2.0 (cache floor :: pb = 6/8)
else if ((2 * l_freq_core_floor) >= (3 * io_freq_fbc))
{
io_core_floor_ratio = fapi2::ENUM_ATTR_PROC_FABRIC_CORE_FLOOR_RATIO_RATIO_6_8;
}
// breakpoint ratio: core floor 2.5, pb 2.0 (cache floor :: pb = 5/8)
else if ((4 * l_freq_core_floor) >= (5 * io_freq_fbc))
{
io_core_floor_ratio = fapi2::ENUM_ATTR_PROC_FABRIC_CORE_FLOOR_RATIO_RATIO_5_8;
}
// breakpoint ratio: core floor 2.0, pb 2.0 (cache floor :: pb = 4/8)
else if (l_freq_core_floor >= io_freq_fbc)
{
io_core_floor_ratio = fapi2::ENUM_ATTR_PROC_FABRIC_CORE_FLOOR_RATIO_RATIO_4_8;
}
// breakpoint ratio: core floor 1.0, pb 2.0 (cache floor :: pb = 2/8)
else if ((2 * l_freq_core_floor) >= io_freq_fbc)
{
io_core_floor_ratio = fapi2::ENUM_ATTR_PROC_FABRIC_CORE_FLOOR_RATIO_RATIO_2_8;
}
// Under-range, raise error
else
{
FAPI_ASSERT(false,
fapi2::P9_FBC_EFF_CONFIG_CORE_FLOOR_FREQ_RATIO_ERR()
.set_FREQ_PB(io_freq_fbc)
.set_FREQ_CORE_FLOOR(l_freq_core_floor)
.set_FREQ_CORE_FLOOR_MIN_SUPPORTED(io_freq_fbc / 2),
"Unsupported core floor/PB frequency ratio = (%d/%d)",
l_freq_core_floor, io_freq_fbc);
}
// determine table index based on fabric/core ceiling frequency ratio
// breakpoint ratio: core ceiling 4.0, pb 2.0 (cache ceiling :: pb = 8/8)
if ((io_freq_core_ceiling) >= (2 * io_freq_fbc))
{
io_core_ceiling_ratio = fapi2::ENUM_ATTR_PROC_FABRIC_CORE_CEILING_RATIO_RATIO_8_8;
}
// breakpoint ratio: core ceiling 3.5, pb 2.0 (cache ceiling :: pb = 7/8)
else if ((4 * io_freq_core_ceiling) >= (7 * io_freq_fbc))
{
io_core_ceiling_ratio = fapi2::ENUM_ATTR_PROC_FABRIC_CORE_CEILING_RATIO_RATIO_7_8;
}
// breakpoint ratio: core ceiling 3.0, pb 2.0 (cache ceiling :: pb = 6/8)
else if ((2 * io_freq_core_ceiling) >= (3 * io_freq_fbc))
{
io_core_ceiling_ratio = fapi2::ENUM_ATTR_PROC_FABRIC_CORE_CEILING_RATIO_RATIO_6_8;
}
// breakpoint ratio: core ceiling 2.5, pb 2.0 (cache ceiling :: pb = 5/8)
else if ((4 * io_freq_core_ceiling) >= (5 * io_freq_fbc))
{
io_core_ceiling_ratio = fapi2::ENUM_ATTR_PROC_FABRIC_CORE_CEILING_RATIO_RATIO_5_8;
}
// breakpoint ratio: core ceiling 2.0, pb 2.0 (cache ceiling :: pb = 4/8)
else if (io_freq_core_ceiling >= io_freq_fbc)
{
io_core_ceiling_ratio = fapi2::ENUM_ATTR_PROC_FABRIC_CORE_CEILING_RATIO_RATIO_4_8;
}
// breakpoint ratio: core ceiling 1.0, pb 2.0 (cache ceiling :: pb = 2/8)
else if ((2 * io_freq_core_ceiling) >= io_freq_fbc)
{
io_core_ceiling_ratio = fapi2::ENUM_ATTR_PROC_FABRIC_CORE_CEILING_RATIO_RATIO_2_8;
}
// Under-range, raise error
else
{
FAPI_ASSERT(false,
fapi2::P9_FBC_EFF_CONFIG_CORE_CEILING_FREQ_RATIO_ERR()
.set_FREQ_PB(io_freq_fbc)
.set_FREQ_CORE_CEILING(io_freq_core_ceiling)
.set_FREQ_CORE_CEILING_MIN_SUPPORTED(io_freq_fbc / 2),
"Unsupported core ceiling/PB frequency ratio = (%d/%d)",
io_freq_core_ceiling, io_freq_fbc);
}
// write attributes
FAPI_TRY(FAPI_ATTR_SET(fapi2::ATTR_PROC_FABRIC_CORE_FLOOR_RATIO, i_target, io_core_floor_ratio),
"Error from FAPI_ATTR_SET (ATTR_PROC_FABRIC_CORE_FLOOR_RATIO)");
FAPI_TRY(FAPI_ATTR_SET(fapi2::ATTR_PROC_FABRIC_CORE_CEILING_RATIO, i_target, io_core_ceiling_ratio),
"Error from FAPI_ATTR_SET (ATTR_PROC_FABRIC_CORE_CEILING_RATIO)");
FAPI_TRY(FAPI_ATTR_SET(fapi2::ATTR_PROC_FABRIC_ASYNC_SAFE_MODE, i_target, l_async_safe_mode),
"Error from FAPI_ATTR_SET (ATTR_PROC_FABRIC_ASYNC_SAFE_MODE)");
fapi_try_exit:
FAPI_DBG("End");
return fapi2::current_err;
}
// NOTE: see doxygen comments in header
fapi2::ReturnCode
p9_fbc_eff_config()
{
FAPI_DBG("Start");
fapi2::Target<fapi2::TARGET_TYPE_SYSTEM> FAPI_SYSTEM;
fapi2::ATTR_PROC_FABRIC_CORE_FLOOR_RATIO_Type l_core_floor_ratio;
fapi2::ATTR_PROC_FABRIC_CORE_CEILING_RATIO_Type l_core_ceiling_ratio;
fapi2::ATTR_FREQ_PB_MHZ_Type l_freq_fbc;
fapi2::ATTR_FREQ_CORE_CEILING_MHZ_Type l_freq_core_ceiling;
FAPI_TRY(p9_fbc_eff_config_process_freq_attributes(
FAPI_SYSTEM,
l_core_floor_ratio,
l_core_ceiling_ratio,
l_freq_fbc,
l_freq_core_ceiling),
"Error from p9_fbc_eff_config_process_freq_attributes");
FAPI_TRY(p9_fbc_eff_config_calc_epsilons(
FAPI_SYSTEM,
l_core_floor_ratio,
l_core_ceiling_ratio,
l_freq_fbc,
l_freq_core_ceiling),
"Error from p9_fbc_eff_config_calc_epsilons");
fapi_try_exit:
FAPI_DBG("End");
return fapi2::current_err;
}