sched_policy.c revision e43c248316d0faa7bdc23de823b068c2aa3520ab
10384a98d6f61fa47ffde01c15e552f738e88fb94Raphael 2493dad966305a7fb555addd367532dd2af275a27San Mehat/* libs/cutils/sched_policy.c 3493dad966305a7fb555addd367532dd2af275a27San Mehat** 4493dad966305a7fb555addd367532dd2af275a27San Mehat** Copyright 2007, The Android Open Source Project 5493dad966305a7fb555addd367532dd2af275a27San Mehat** 6493dad966305a7fb555addd367532dd2af275a27San Mehat** Licensed under the Apache License, Version 2.0 (the "License"); 7493dad966305a7fb555addd367532dd2af275a27San Mehat** you may not use this file except in compliance with the License. 8493dad966305a7fb555addd367532dd2af275a27San Mehat** You may obtain a copy of the License at 9493dad966305a7fb555addd367532dd2af275a27San Mehat** 10493dad966305a7fb555addd367532dd2af275a27San Mehat** http://www.apache.org/licenses/LICENSE-2.0 11493dad966305a7fb555addd367532dd2af275a27San Mehat** 12493dad966305a7fb555addd367532dd2af275a27San Mehat** Unless required by applicable law or agreed to in writing, software 13493dad966305a7fb555addd367532dd2af275a27San Mehat** distributed under the License is distributed on an "AS IS" BASIS, 14493dad966305a7fb555addd367532dd2af275a27San Mehat** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15493dad966305a7fb555addd367532dd2af275a27San Mehat** See the License for the specific language governing permissions and 16493dad966305a7fb555addd367532dd2af275a27San Mehat** limitations under the License. 17493dad966305a7fb555addd367532dd2af275a27San Mehat*/ 18493dad966305a7fb555addd367532dd2af275a27San Mehat 19493dad966305a7fb555addd367532dd2af275a27San Mehat#include <stdio.h> 20493dad966305a7fb555addd367532dd2af275a27San Mehat#include <stdlib.h> 21493dad966305a7fb555addd367532dd2af275a27San Mehat#include <unistd.h> 22493dad966305a7fb555addd367532dd2af275a27San Mehat#include <string.h> 23493dad966305a7fb555addd367532dd2af275a27San Mehat#include <errno.h> 24493dad966305a7fb555addd367532dd2af275a27San Mehat#include <fcntl.h> 25e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick#include <pthread.h> 260384a98d6f61fa47ffde01c15e552f738e88fb94Raphael 27d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat#define LOG_TAG "SchedPolicy" 28d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat#include "cutils/log.h" 29d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat 300384a98d6f61fa47ffde01c15e552f738e88fb94Raphael#ifdef HAVE_SCHED_H 310384a98d6f61fa47ffde01c15e552f738e88fb94Raphael 32493dad966305a7fb555addd367532dd2af275a27San Mehat#include <sched.h> 33493dad966305a7fb555addd367532dd2af275a27San Mehat 34493dad966305a7fb555addd367532dd2af275a27San Mehat#include <cutils/sched_policy.h> 35493dad966305a7fb555addd367532dd2af275a27San Mehat 363cd5b66ba05cffe38bfa4e2da9b93292ba0b073aSan Mehat#ifndef SCHED_NORMAL 373cd5b66ba05cffe38bfa4e2da9b93292ba0b073aSan Mehat #define SCHED_NORMAL 0 383cd5b66ba05cffe38bfa4e2da9b93292ba0b073aSan Mehat#endif 393cd5b66ba05cffe38bfa4e2da9b93292ba0b073aSan Mehat 403cd5b66ba05cffe38bfa4e2da9b93292ba0b073aSan Mehat#ifndef SCHED_BATCH 413cd5b66ba05cffe38bfa4e2da9b93292ba0b073aSan Mehat #define SCHED_BATCH 3 423cd5b66ba05cffe38bfa4e2da9b93292ba0b073aSan Mehat#endif 433cd5b66ba05cffe38bfa4e2da9b93292ba0b073aSan Mehat 44805d67ab11c1bb21d494459d6167f5f67f0002ebSan Mehat#define POLICY_DEBUG 0 45d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat 46e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrickstatic pthread_once_t the_once = PTHREAD_ONCE_INIT; 47e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick 48c0dfca7ae1f6016461235552091c2cacacca82a2San Mehatstatic int __sys_supports_schedgroups = -1; 49c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat 50e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick// File descriptors open to /dev/cpuctl/../tasks, setup by initialize, or -1 on error. 51e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrickstatic int normal_cgroup_fd = -1; 52e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrickstatic int bg_cgroup_fd = -1; 53e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick 54e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick/* Add tid to the scheduling group defined by the policy */ 55e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrickstatic int add_tid_to_cgroup(int tid, SchedPolicy policy) 56493dad966305a7fb555addd367532dd2af275a27San Mehat{ 57493dad966305a7fb555addd367532dd2af275a27San Mehat int fd; 58e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick 59e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick if (policy == SP_BACKGROUND) { 60e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick fd = bg_cgroup_fd; 61e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick } else { 62e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick fd = normal_cgroup_fd; 63e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick } 64e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick 65e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick if (fd < 0) { 66e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick SLOGE("add_tid_to_cgroup failed; background=%d\n", 67e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick policy == SP_BACKGROUND ? 1 : 0); 68493dad966305a7fb555addd367532dd2af275a27San Mehat return -1; 69805d67ab11c1bb21d494459d6167f5f67f0002ebSan Mehat } 70493dad966305a7fb555addd367532dd2af275a27San Mehat 71253e27acb6c9e3e0b03c59f25cdf9ecbd64bcdadBrad Fitzpatrick // specialized itoa -- works for tid > 0 72253e27acb6c9e3e0b03c59f25cdf9ecbd64bcdadBrad Fitzpatrick char text[22]; 73253e27acb6c9e3e0b03c59f25cdf9ecbd64bcdadBrad Fitzpatrick char *end = text + sizeof(text) - 1; 74253e27acb6c9e3e0b03c59f25cdf9ecbd64bcdadBrad Fitzpatrick char *ptr = end; 75253e27acb6c9e3e0b03c59f25cdf9ecbd64bcdadBrad Fitzpatrick *ptr = '\0'; 76253e27acb6c9e3e0b03c59f25cdf9ecbd64bcdadBrad Fitzpatrick while (tid > 0) { 77253e27acb6c9e3e0b03c59f25cdf9ecbd64bcdadBrad Fitzpatrick *--ptr = '0' + (tid % 10); 78253e27acb6c9e3e0b03c59f25cdf9ecbd64bcdadBrad Fitzpatrick tid = tid / 10; 79253e27acb6c9e3e0b03c59f25cdf9ecbd64bcdadBrad Fitzpatrick } 80253e27acb6c9e3e0b03c59f25cdf9ecbd64bcdadBrad Fitzpatrick 81253e27acb6c9e3e0b03c59f25cdf9ecbd64bcdadBrad Fitzpatrick if (write(fd, ptr, end - ptr) < 0) { 82e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick /* 83e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick * If the thread is in the process of exiting, 84e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick * don't flag an error 85e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick */ 86e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick if (errno == ESRCH) 87e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick return 0; 88e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick SLOGW("add_tid_to_cgroup failed to write '%s' (%s); background=%d\n", 89e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick ptr, strerror(errno), policy == SP_BACKGROUND ? 1 : 0); 90493dad966305a7fb555addd367532dd2af275a27San Mehat return -1; 91493dad966305a7fb555addd367532dd2af275a27San Mehat } 92493dad966305a7fb555addd367532dd2af275a27San Mehat 93493dad966305a7fb555addd367532dd2af275a27San Mehat return 0; 94493dad966305a7fb555addd367532dd2af275a27San Mehat} 95493dad966305a7fb555addd367532dd2af275a27San Mehat 96e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrickstatic void __initialize(void) { 97e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick char* filename; 98e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick if (!access("/dev/cpuctl/tasks", F_OK)) { 99e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick __sys_supports_schedgroups = 1; 100e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick 101e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick filename = "/dev/cpuctl/tasks"; 102e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick normal_cgroup_fd = open(filename, O_WRONLY); 103e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick if (normal_cgroup_fd < 0) { 104e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick SLOGE("open of %s failed: %s\n", filename, strerror(errno)); 105e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick } 106e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick 107e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick filename = "/dev/cpuctl/bg_non_interactive/tasks"; 108e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick bg_cgroup_fd = open(filename, O_WRONLY); 109e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick if (bg_cgroup_fd < 0) { 110e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick SLOGE("open of %s failed: %s\n", filename, strerror(errno)); 111493dad966305a7fb555addd367532dd2af275a27San Mehat } 112e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick } else { 113e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick __sys_supports_schedgroups = 0; 114493dad966305a7fb555addd367532dd2af275a27San Mehat } 115c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat} 116c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat 117c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat/* 118c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat * Try to get the scheduler group. 119c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat * 120503df2075991cd03ddf43d14e05768a2138b9028San Mehat * The data from /proc/<pid>/cgroup looks (something) like: 121c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat * 2:cpu:/bg_non_interactive 122503df2075991cd03ddf43d14e05768a2138b9028San Mehat * 1:cpuacct:/ 123c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat * 124c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat * We return the part after the "/", which will be an empty string for 125c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat * the default cgroup. If the string is longer than "bufLen", the string 126c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat * will be truncated. 127c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat */ 128c0dfca7ae1f6016461235552091c2cacacca82a2San Mehatstatic int getSchedulerGroup(int tid, char* buf, size_t bufLen) 129c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat{ 130c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat#ifdef HAVE_ANDROID_OS 131c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat char pathBuf[32]; 132503df2075991cd03ddf43d14e05768a2138b9028San Mehat char lineBuf[256]; 133503df2075991cd03ddf43d14e05768a2138b9028San Mehat FILE *fp; 134c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat 135c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat snprintf(pathBuf, sizeof(pathBuf), "/proc/%d/cgroup", tid); 136503df2075991cd03ddf43d14e05768a2138b9028San Mehat if (!(fp = fopen(pathBuf, "r"))) { 137c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat return -1; 138c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat } 139c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat 140503df2075991cd03ddf43d14e05768a2138b9028San Mehat while(fgets(lineBuf, sizeof(lineBuf) -1, fp)) { 141503df2075991cd03ddf43d14e05768a2138b9028San Mehat char *next = lineBuf; 142503df2075991cd03ddf43d14e05768a2138b9028San Mehat char *subsys; 143503df2075991cd03ddf43d14e05768a2138b9028San Mehat char *grp; 144503df2075991cd03ddf43d14e05768a2138b9028San Mehat size_t len; 145c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat 146503df2075991cd03ddf43d14e05768a2138b9028San Mehat /* Junk the first field */ 147503df2075991cd03ddf43d14e05768a2138b9028San Mehat if (!strsep(&next, ":")) { 148503df2075991cd03ddf43d14e05768a2138b9028San Mehat goto out_bad_data; 149503df2075991cd03ddf43d14e05768a2138b9028San Mehat } 150c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat 151503df2075991cd03ddf43d14e05768a2138b9028San Mehat if (!(subsys = strsep(&next, ":"))) { 152503df2075991cd03ddf43d14e05768a2138b9028San Mehat goto out_bad_data; 153503df2075991cd03ddf43d14e05768a2138b9028San Mehat } 154503df2075991cd03ddf43d14e05768a2138b9028San Mehat 155503df2075991cd03ddf43d14e05768a2138b9028San Mehat if (strcmp(subsys, "cpu")) { 156503df2075991cd03ddf43d14e05768a2138b9028San Mehat /* Not the subsys we're looking for */ 157503df2075991cd03ddf43d14e05768a2138b9028San Mehat continue; 158503df2075991cd03ddf43d14e05768a2138b9028San Mehat } 159503df2075991cd03ddf43d14e05768a2138b9028San Mehat 160503df2075991cd03ddf43d14e05768a2138b9028San Mehat if (!(grp = strsep(&next, ":"))) { 161503df2075991cd03ddf43d14e05768a2138b9028San Mehat goto out_bad_data; 162503df2075991cd03ddf43d14e05768a2138b9028San Mehat } 163503df2075991cd03ddf43d14e05768a2138b9028San Mehat grp++; /* Drop the leading '/' */ 164503df2075991cd03ddf43d14e05768a2138b9028San Mehat len = strlen(grp); 165503df2075991cd03ddf43d14e05768a2138b9028San Mehat grp[len-1] = '\0'; /* Drop the trailing '\n' */ 166503df2075991cd03ddf43d14e05768a2138b9028San Mehat 167503df2075991cd03ddf43d14e05768a2138b9028San Mehat if (bufLen <= len) { 168503df2075991cd03ddf43d14e05768a2138b9028San Mehat len = bufLen - 1; 169503df2075991cd03ddf43d14e05768a2138b9028San Mehat } 170503df2075991cd03ddf43d14e05768a2138b9028San Mehat strncpy(buf, grp, len); 171503df2075991cd03ddf43d14e05768a2138b9028San Mehat buf[len] = '\0'; 172503df2075991cd03ddf43d14e05768a2138b9028San Mehat fclose(fp); 173503df2075991cd03ddf43d14e05768a2138b9028San Mehat return 0; 174c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat } 175c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat 1767e8529a8b528fd30586aa037f15a31b29582c537San Mehat SLOGE("Failed to find cpu subsys"); 177503df2075991cd03ddf43d14e05768a2138b9028San Mehat fclose(fp); 178503df2075991cd03ddf43d14e05768a2138b9028San Mehat return -1; 179503df2075991cd03ddf43d14e05768a2138b9028San Mehat out_bad_data: 1807e8529a8b528fd30586aa037f15a31b29582c537San Mehat SLOGE("Bad cgroup data {%s}", lineBuf); 181503df2075991cd03ddf43d14e05768a2138b9028San Mehat fclose(fp); 182503df2075991cd03ddf43d14e05768a2138b9028San Mehat return -1; 183c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat#else 184c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat errno = ENOSYS; 185c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat return -1; 186c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat#endif 187c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat} 188c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat 189c0dfca7ae1f6016461235552091c2cacacca82a2San Mehatint get_sched_policy(int tid, SchedPolicy *policy) 190c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat{ 191e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick pthread_once(&the_once, __initialize); 192c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat 193c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat if (__sys_supports_schedgroups) { 194c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat char grpBuf[32]; 195c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat if (getSchedulerGroup(tid, grpBuf, sizeof(grpBuf)) < 0) 196c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat return -1; 197c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat if (grpBuf[0] == '\0') { 198c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat *policy = SP_FOREGROUND; 199c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat } else if (!strcmp(grpBuf, "bg_non_interactive")) { 200c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat *policy = SP_BACKGROUND; 201c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat } else { 202c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat errno = ERANGE; 203c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat return -1; 204c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat } 205c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat } else { 206c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat int rc = sched_getscheduler(tid); 207c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat if (rc < 0) 208c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat return -1; 209c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat else if (rc == SCHED_NORMAL) 210c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat *policy = SP_FOREGROUND; 211c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat else if (rc == SCHED_BATCH) 212c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat *policy = SP_BACKGROUND; 213c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat else { 214c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat errno = ERANGE; 215c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat return -1; 216c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat } 217c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat } 218c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat return 0; 219c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat} 220c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat 221c0dfca7ae1f6016461235552091c2cacacca82a2San Mehatint set_sched_policy(int tid, SchedPolicy policy) 222c0dfca7ae1f6016461235552091c2cacacca82a2San Mehat{ 223e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick pthread_once(&the_once, __initialize); 224493dad966305a7fb555addd367532dd2af275a27San Mehat 225d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat#if POLICY_DEBUG 226d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat char statfile[64]; 227d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat char statline[1024]; 228d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat char thread_name[255]; 229d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat int fd; 230d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat 231d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat sprintf(statfile, "/proc/%d/stat", tid); 232d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat memset(thread_name, 0, sizeof(thread_name)); 233d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat 234d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat fd = open(statfile, O_RDONLY); 235d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat if (fd >= 0) { 236d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat int rc = read(fd, statline, 1023); 237d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat close(fd); 238d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat statline[rc] = 0; 239d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat char *p = statline; 240d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat char *q; 241d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat 242d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat for (p = statline; *p != '('; p++); 243d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat p++; 244d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat for (q = p; *q != ')'; q++); 245d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat 246d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat strncpy(thread_name, p, (q-p)); 247d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat } 248d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat if (policy == SP_BACKGROUND) { 2497e8529a8b528fd30586aa037f15a31b29582c537San Mehat SLOGD("vvv tid %d (%s)", tid, thread_name); 250d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat } else if (policy == SP_FOREGROUND) { 2517e8529a8b528fd30586aa037f15a31b29582c537San Mehat SLOGD("^^^ tid %d (%s)", tid, thread_name); 252d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat } else { 2537e8529a8b528fd30586aa037f15a31b29582c537San Mehat SLOGD("??? tid %d (%s)", tid, thread_name); 254d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat } 255d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat#endif 256d2e4e46ce4bc29c3328fccfbbbe0590eaa8713f7San Mehat 257493dad966305a7fb555addd367532dd2af275a27San Mehat if (__sys_supports_schedgroups) { 258e43c248316d0faa7bdc23de823b068c2aa3520abBrad Fitzpatrick if (add_tid_to_cgroup(tid, policy)) { 259493dad966305a7fb555addd367532dd2af275a27San Mehat if (errno != ESRCH && errno != ENOENT) 260493dad966305a7fb555addd367532dd2af275a27San Mehat return -errno; 261493dad966305a7fb555addd367532dd2af275a27San Mehat } 262493dad966305a7fb555addd367532dd2af275a27San Mehat } else { 263493dad966305a7fb555addd367532dd2af275a27San Mehat struct sched_param param; 264493dad966305a7fb555addd367532dd2af275a27San Mehat 265493dad966305a7fb555addd367532dd2af275a27San Mehat param.sched_priority = 0; 266493dad966305a7fb555addd367532dd2af275a27San Mehat sched_setscheduler(tid, 267493dad966305a7fb555addd367532dd2af275a27San Mehat (policy == SP_BACKGROUND) ? 268493dad966305a7fb555addd367532dd2af275a27San Mehat SCHED_BATCH : SCHED_NORMAL, 269493dad966305a7fb555addd367532dd2af275a27San Mehat ¶m); 270493dad966305a7fb555addd367532dd2af275a27San Mehat } 271493dad966305a7fb555addd367532dd2af275a27San Mehat 272493dad966305a7fb555addd367532dd2af275a27San Mehat return 0; 273493dad966305a7fb555addd367532dd2af275a27San Mehat} 2740384a98d6f61fa47ffde01c15e552f738e88fb94Raphael 2750384a98d6f61fa47ffde01c15e552f738e88fb94Raphael#endif /* HAVE_SCHED_H */ 276