1 /*
2 * Copyright (c) 2023 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "rtg_perf_ctrl.h"
17 #include "dfx/log/ffrt_log_api.h"
18
19 #include <cstdio>
20 #include <cstdlib>
21 #include <cstring>
22 #include <unistd.h>
23 #include <sys/types.h>
24 #include <sys/ioctl.h>
25 #include <sys/stat.h>
26 #include <fcntl.h>
27 #include <cerrno>
28 #include <securec.h>
29
OpenPerfCtrl(void)30 static int OpenPerfCtrl(void)
31 {
32 static bool perfCtrlAvailable = true;
33 int fd = -1;
34
35 if (!perfCtrlAvailable) {
36 return -1;
37 }
38
39 fd = open("/dev/hisi_perf_ctrl", O_RDWR);
40 if (fd < 0) {
41 FFRT_LOGW("open perf_ctrl failed");
42 perfCtrlAvailable = false;
43 }
44
45 return fd;
46 }
47
SetTaskRtg(pid_t tid,unsigned int grpId)48 void SetTaskRtg(pid_t tid, unsigned int grpId)
49 {
50 struct RtgGroupTask data = {tid, grpId, 0};
51 int fd = OpenPerfCtrl();
52 if (fd < 0) {
53 return;
54 }
55
56 if (ioctl(fd, PERF_CTRL_SET_TASK_RTG, &data)) {
57 FFRT_LOGW("Error set rtg %d,%u. %s", tid, grpId, strerror(errno));
58 close(fd);
59 return;
60 }
61 close(fd);
62 }
63
SetRtgStatus(unsigned long long status)64 void SetRtgStatus(unsigned long long status)
65 {
66 int fd = OpenPerfCtrl();
67 if (fd < 0) {
68 return;
69 }
70
71 if (ioctl(fd, PERF_CTRL_SET_FRAME_STATUS, &status)) {
72 FFRT_LOGW("Error set rtg status=%llu. %s", status, strerror(errno));
73 close(fd);
74 return;
75 }
76 close(fd);
77 }
78
SetRtgQos(int qos)79 void SetRtgQos(int qos) // MHZ
80 {
81 int fd = OpenPerfCtrl();
82 if (fd < 0) {
83 return;
84 }
85
86 if (ioctl(fd, PERF_CTRL_SET_FRAME_RATE, &qos)) {
87 FFRT_LOGW("Error set rtg qos=%d. %s", qos, strerror(errno));
88 close(fd);
89 return;
90 }
91 close(fd);
92 }
93
SetRtgLoadMode(unsigned int grpId,bool utilEnabled,bool freqEnabled)94 void SetRtgLoadMode(unsigned int grpId, bool utilEnabled, bool freqEnabled)
95 {
96 struct RtgLoadMode loadMode;
97
98 memset_s(&loadMode, sizeof(struct RtgLoadMode), 0, sizeof(struct RtgLoadMode));
99 loadMode.grpId = grpId;
100 loadMode.utilEnabled = !!utilEnabled;
101 loadMode.freqEnabled = !!freqEnabled;
102
103 int fd = OpenPerfCtrl();
104 if (fd < 0) {
105 return;
106 }
107
108 if (ioctl(fd, PERF_CTRL_SET_RTG_LOAD_MODE, &loadMode)) {
109 FFRT_LOGW("Error set rtg loadMode %d:%d/%d. %s", loadMode.grpId, loadMode.utilEnabled,
110 loadMode.freqEnabled, strerror(errno));
111 close(fd);
112 return;
113 }
114 close(fd);
115 }
116
set_task_min_util(pid_t tid,unsigned int util)117 void set_task_min_util(pid_t tid, unsigned int util)
118 {
119 struct TaskConfig cfg = {tid, util};
120 int fd = OpenPerfCtrl();
121 if (fd < 0) {
122 return;
123 }
124
125 if (ioctl(fd, PERF_CTRL_SET_TASK_MIN_UTIL, &cfg)) {
126 FFRT_LOGW("Error set min util %d,%u. %s", tid, util, strerror(errno));
127 close(fd);
128 return;
129 }
130 close(fd);
131 }
132