Created
January 19, 2016 20:48
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pahole of task_struct, linux 4.4
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| struct task_struct { | |
| volatile long int state; /* 0 8 */ | |
| void * stack; /* 8 8 */ | |
| atomic_t usage; /* 16 4 */ | |
| unsigned int flags; /* 20 4 */ | |
| unsigned int ptrace; /* 24 4 */ | |
| /* XXX 4 bytes hole, try to pack */ | |
| struct llist_node wake_entry; /* 32 8 */ | |
| int on_cpu; /* 40 4 */ | |
| unsigned int wakee_flips; /* 44 4 */ | |
| long unsigned int wakee_flip_decay_ts; /* 48 8 */ | |
| struct task_struct * last_wakee; /* 56 8 */ | |
| /* --- cacheline 1 boundary (64 bytes) --- */ | |
| int wake_cpu; /* 64 4 */ | |
| int on_rq; /* 68 4 */ | |
| int prio; /* 72 4 */ | |
| int static_prio; /* 76 4 */ | |
| int normal_prio; /* 80 4 */ | |
| unsigned int rt_priority; /* 84 4 */ | |
| const struct sched_class * sched_class; /* 88 8 */ | |
| struct sched_entity se; /* 96 392 */ | |
| /* --- cacheline 7 boundary (448 bytes) was 40 bytes ago --- */ | |
| struct sched_rt_entity rt; /* 488 48 */ | |
| /* --- cacheline 8 boundary (512 bytes) was 24 bytes ago --- */ | |
| struct task_group * sched_task_group; /* 536 8 */ | |
| struct sched_dl_entity dl; /* 544 192 */ | |
| /* --- cacheline 11 boundary (704 bytes) was 32 bytes ago --- */ | |
| struct hlist_head preempt_notifiers; /* 736 8 */ | |
| unsigned int btrace_seq; /* 744 4 */ | |
| unsigned int policy; /* 748 4 */ | |
| int nr_cpus_allowed; /* 752 4 */ | |
| /* XXX 4 bytes hole, try to pack */ | |
| cpumask_t cpus_allowed; /* 760 32 */ | |
| /* --- cacheline 12 boundary (768 bytes) was 24 bytes ago --- */ | |
| struct sched_info sched_info; /* 792 32 */ | |
| struct list_head tasks; /* 824 16 */ | |
| /* --- cacheline 13 boundary (832 bytes) was 8 bytes ago --- */ | |
| struct plist_node pushable_tasks; /* 840 40 */ | |
| struct rb_node pushable_dl_tasks; /* 880 24 */ | |
| /* --- cacheline 14 boundary (896 bytes) was 8 bytes ago --- */ | |
| struct mm_struct * mm; /* 904 8 */ | |
| struct mm_struct * active_mm; /* 912 8 */ | |
| u32 vmacache_seqnum; /* 920 4 */ | |
| /* XXX 4 bytes hole, try to pack */ | |
| struct vm_area_struct * vmacache[4]; /* 928 32 */ | |
| /* --- cacheline 15 boundary (960 bytes) --- */ | |
| struct task_rss_stat rss_stat; /* 960 16 */ | |
| int exit_state; /* 976 4 */ | |
| int exit_code; /* 980 4 */ | |
| int exit_signal; /* 984 4 */ | |
| int pdeath_signal; /* 988 4 */ | |
| long unsigned int jobctl; /* 992 8 */ | |
| unsigned int personality; /* 1000 4 */ | |
| unsigned int sched_reset_on_fork:1; /* 1004:31 4 */ | |
| unsigned int sched_contributes_to_load:1; /* 1004:30 4 */ | |
| unsigned int sched_migrated:1; /* 1004:29 4 */ | |
| /* XXX 29 bits hole, try to pack */ | |
| unsigned int in_execve:1; /* 1008:31 4 */ | |
| unsigned int in_iowait:1; /* 1008:30 4 */ | |
| unsigned int memcg_may_oom:1; /* 1008:29 4 */ | |
| unsigned int memcg_kmem_skip_account:1; /* 1008:28 4 */ | |
| /* XXX 28 bits hole, try to pack */ | |
| /* XXX 4 bytes hole, try to pack */ | |
| long unsigned int atomic_flags; /* 1016 8 */ | |
| /* --- cacheline 16 boundary (1024 bytes) --- */ | |
| struct restart_block restart_block; /* 1024 48 */ | |
| pid_t pid; /* 1072 4 */ | |
| pid_t tgid; /* 1076 4 */ | |
| struct task_struct * real_parent; /* 1080 8 */ | |
| /* --- cacheline 17 boundary (1088 bytes) --- */ | |
| struct task_struct * parent; /* 1088 8 */ | |
| struct list_head children; /* 1096 16 */ | |
| struct list_head sibling; /* 1112 16 */ | |
| struct task_struct * group_leader; /* 1128 8 */ | |
| struct list_head ptraced; /* 1136 16 */ | |
| /* --- cacheline 18 boundary (1152 bytes) --- */ | |
| struct list_head ptrace_entry; /* 1152 16 */ | |
| struct pid_link pids[3]; /* 1168 72 */ | |
| /* --- cacheline 19 boundary (1216 bytes) was 24 bytes ago --- */ | |
| struct list_head thread_group; /* 1240 16 */ | |
| struct list_head thread_node; /* 1256 16 */ | |
| struct completion * vfork_done; /* 1272 8 */ | |
| /* --- cacheline 20 boundary (1280 bytes) --- */ | |
| int * set_child_tid; /* 1280 8 */ | |
| int * clear_child_tid; /* 1288 8 */ | |
| cputime_t utime; /* 1296 8 */ | |
| cputime_t stime; /* 1304 8 */ | |
| cputime_t utimescaled; /* 1312 8 */ | |
| cputime_t stimescaled; /* 1320 8 */ | |
| cputime_t gtime; /* 1328 8 */ | |
| struct prev_cputime prev_cputime; /* 1336 24 */ | |
| /* --- cacheline 21 boundary (1344 bytes) was 16 bytes ago --- */ | |
| seqlock_t vtime_seqlock; /* 1360 8 */ | |
| long long unsigned int vtime_snap; /* 1368 8 */ | |
| enum { | |
| VTIME_SLEEPING = 0, | |
| VTIME_USER = 1, | |
| VTIME_SYS = 2, | |
| } vtime_snap_whence; /* 1376 4 */ | |
| /* XXX 4 bytes hole, try to pack */ | |
| long unsigned int nvcsw; /* 1384 8 */ | |
| long unsigned int nivcsw; /* 1392 8 */ | |
| u64 start_time; /* 1400 8 */ | |
| /* --- cacheline 22 boundary (1408 bytes) --- */ | |
| u64 real_start_time; /* 1408 8 */ | |
| long unsigned int min_flt; /* 1416 8 */ | |
| long unsigned int maj_flt; /* 1424 8 */ | |
| struct task_cputime cputime_expires; /* 1432 24 */ | |
| struct list_head cpu_timers[3]; /* 1456 48 */ | |
| /* --- cacheline 23 boundary (1472 bytes) was 32 bytes ago --- */ | |
| const struct cred * real_cred; /* 1504 8 */ | |
| const struct cred * cred; /* 1512 8 */ | |
| char comm[16]; /* 1520 16 */ | |
| /* --- cacheline 24 boundary (1536 bytes) --- */ | |
| struct nameidata * nameidata; /* 1536 8 */ | |
| struct sysv_sem sysvsem; /* 1544 8 */ | |
| struct sysv_shm sysvshm; /* 1552 16 */ | |
| long unsigned int last_switch_count; /* 1568 8 */ | |
| struct fs_struct * fs; /* 1576 8 */ | |
| struct files_struct * files; /* 1584 8 */ | |
| struct nsproxy * nsproxy; /* 1592 8 */ | |
| /* --- cacheline 25 boundary (1600 bytes) --- */ | |
| struct signal_struct * signal; /* 1600 8 */ | |
| struct sighand_struct * sighand; /* 1608 8 */ | |
| sigset_t blocked; /* 1616 8 */ | |
| sigset_t real_blocked; /* 1624 8 */ | |
| sigset_t saved_sigmask; /* 1632 8 */ | |
| struct sigpending pending; /* 1640 24 */ | |
| /* --- cacheline 26 boundary (1664 bytes) --- */ | |
| long unsigned int sas_ss_sp; /* 1664 8 */ | |
| size_t sas_ss_size; /* 1672 8 */ | |
| struct callback_head * task_works; /* 1680 8 */ | |
| struct audit_context * audit_context; /* 1688 8 */ | |
| kuid_t loginuid; /* 1696 4 */ | |
| unsigned int sessionid; /* 1700 4 */ | |
| struct seccomp seccomp; /* 1704 16 */ | |
| u32 parent_exec_id; /* 1720 4 */ | |
| u32 self_exec_id; /* 1724 4 */ | |
| /* --- cacheline 27 boundary (1728 bytes) --- */ | |
| spinlock_t alloc_lock; /* 1728 4 */ | |
| raw_spinlock_t pi_lock; /* 1732 4 */ | |
| struct wake_q_node wake_q; /* 1736 8 */ | |
| struct rb_root pi_waiters; /* 1744 8 */ | |
| struct rb_node * pi_waiters_leftmost; /* 1752 8 */ | |
| struct rt_mutex_waiter * pi_blocked_on; /* 1760 8 */ | |
| void * journal_info; /* 1768 8 */ | |
| struct bio_list * bio_list; /* 1776 8 */ | |
| struct blk_plug * plug; /* 1784 8 */ | |
| /* --- cacheline 28 boundary (1792 bytes) --- */ | |
| struct reclaim_state * reclaim_state; /* 1792 8 */ | |
| struct backing_dev_info * backing_dev_info; /* 1800 8 */ | |
| struct io_context * io_context; /* 1808 8 */ | |
| long unsigned int ptrace_message; /* 1816 8 */ | |
| siginfo_t * last_siginfo; /* 1824 8 */ | |
| struct task_io_accounting ioac; /* 1832 56 */ | |
| /* --- cacheline 29 boundary (1856 bytes) was 32 bytes ago --- */ | |
| u64 acct_rss_mem1; /* 1888 8 */ | |
| u64 acct_vm_mem1; /* 1896 8 */ | |
| cputime_t acct_timexpd; /* 1904 8 */ | |
| nodemask_t mems_allowed; /* 1912 8 */ | |
| /* --- cacheline 30 boundary (1920 bytes) --- */ | |
| seqcount_t mems_allowed_seq; /* 1920 4 */ | |
| int cpuset_mem_spread_rotor; /* 1924 4 */ | |
| int cpuset_slab_spread_rotor; /* 1928 4 */ | |
| /* XXX 4 bytes hole, try to pack */ | |
| struct css_set * cgroups; /* 1936 8 */ | |
| struct list_head cg_list; /* 1944 16 */ | |
| struct robust_list_head * robust_list; /* 1960 8 */ | |
| struct compat_robust_list_head * compat_robust_list; /* 1968 8 */ | |
| struct list_head pi_state_list; /* 1976 16 */ | |
| /* --- cacheline 31 boundary (1984 bytes) was 8 bytes ago --- */ | |
| struct futex_pi_state * pi_state_cache; /* 1992 8 */ | |
| struct perf_event_context * perf_event_ctxp[2]; /* 2000 16 */ | |
| struct mutex perf_event_mutex; /* 2016 40 */ | |
| /* --- cacheline 32 boundary (2048 bytes) was 8 bytes ago --- */ | |
| struct list_head perf_event_list; /* 2056 16 */ | |
| struct mempolicy * mempolicy; /* 2072 8 */ | |
| short int il_next; /* 2080 2 */ | |
| short int pref_node_fork; /* 2082 2 */ | |
| int numa_scan_seq; /* 2084 4 */ | |
| unsigned int numa_scan_period; /* 2088 4 */ | |
| unsigned int numa_scan_period_max; /* 2092 4 */ | |
| int numa_preferred_nid; /* 2096 4 */ | |
| /* XXX 4 bytes hole, try to pack */ | |
| long unsigned int numa_migrate_retry; /* 2104 8 */ | |
| /* --- cacheline 33 boundary (2112 bytes) --- */ | |
| u64 node_stamp; /* 2112 8 */ | |
| u64 last_task_numa_placement; /* 2120 8 */ | |
| u64 last_sum_exec_runtime; /* 2128 8 */ | |
| struct callback_head numa_work; /* 2136 16 */ | |
| struct list_head numa_entry; /* 2152 16 */ | |
| struct numa_group * numa_group; /* 2168 8 */ | |
| /* --- cacheline 34 boundary (2176 bytes) --- */ | |
| long unsigned int * numa_faults; /* 2176 8 */ | |
| long unsigned int total_numa_faults; /* 2184 8 */ | |
| long unsigned int numa_faults_locality[3]; /* 2192 24 */ | |
| long unsigned int numa_pages_migrated; /* 2216 8 */ | |
| struct tlbflush_unmap_batch tlb_ubc; /* 2224 40 */ | |
| /* --- cacheline 35 boundary (2240 bytes) was 24 bytes ago --- */ | |
| struct callback_head rcu; /* 2264 16 */ | |
| struct pipe_inode_info * splice_pipe; /* 2280 8 */ | |
| struct page_frag task_frag; /* 2288 16 */ | |
| /* --- cacheline 36 boundary (2304 bytes) --- */ | |
| struct task_delay_info * delays; /* 2304 8 */ | |
| int nr_dirtied; /* 2312 4 */ | |
| int nr_dirtied_pause; /* 2316 4 */ | |
| long unsigned int dirty_paused_when; /* 2320 8 */ | |
| int latency_record_count; /* 2328 4 */ | |
| /* XXX 4 bytes hole, try to pack */ | |
| struct latency_record latency_record[32]; /* 2336 3840 */ | |
| /* --- cacheline 96 boundary (6144 bytes) was 32 bytes ago --- */ | |
| long unsigned int timer_slack_ns; /* 6176 8 */ | |
| long unsigned int default_timer_slack_ns; /* 6184 8 */ | |
| int curr_ret_stack; /* 6192 4 */ | |
| /* XXX 4 bytes hole, try to pack */ | |
| struct ftrace_ret_stack * ret_stack; /* 6200 8 */ | |
| /* --- cacheline 97 boundary (6208 bytes) --- */ | |
| long long unsigned int ftrace_timestamp; /* 6208 8 */ | |
| atomic_t trace_overrun; /* 6216 4 */ | |
| atomic_t tracing_graph_pause; /* 6220 4 */ | |
| long unsigned int trace; /* 6224 8 */ | |
| long unsigned int trace_recursion; /* 6232 8 */ | |
| struct mem_cgroup * memcg_in_oom; /* 6240 8 */ | |
| gfp_t memcg_oom_gfp_mask; /* 6248 4 */ | |
| int memcg_oom_order; /* 6252 4 */ | |
| unsigned int memcg_nr_pages_over_high; /* 6256 4 */ | |
| /* XXX 4 bytes hole, try to pack */ | |
| struct uprobe_task * utask; /* 6264 8 */ | |
| /* --- cacheline 98 boundary (6272 bytes) --- */ | |
| unsigned int sequential_io; /* 6272 4 */ | |
| unsigned int sequential_io_avg; /* 6276 4 */ | |
| int pagefault_disabled; /* 6280 4 */ | |
| /* XXX 52 bytes hole, try to pack */ | |
| /* --- cacheline 99 boundary (6336 bytes) --- */ | |
| struct thread_struct thread; /* 6336 4352 */ | |
| /* --- cacheline 167 boundary (10688 bytes) --- */ | |
| /* size: 10688, cachelines: 167, members: 184 */ | |
| /* sum members: 10596, holes: 11, sum holes: 92 */ | |
| /* bit holes: 2, sum bit holes: 57 bits */ | |
| }; |
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