litmus-rt.git - The LITMUS^RT kernel.

diff options

Diffstat (limited to 'Documentation/accounting')

-rw-r--r--

Documentation/accounting/delay-accounting.txt

-rw-r--r--

2 files changed, 14 insertions, 5 deletions

 a) waiting for a CPU (while being runnable)
 b) completion of synchronous block I/O initiated by the task
 c) swapping in pages
+d) memory reclaim
 and makes these statistics available to userspace through
 the taskstats interface.
      include/linux/taskstats.h
 for a description of the fields pertaining to delay accounting.
 It will generally be in the form of counters returning the cumulative
-delay seen for cpu, sync block I/O, swapin etc.
+delay seen for cpu, sync block I/O, swapin, memory reclaim etc.
 Taking the difference of two successive readings of a given
 counter (say cpu_delay_total) for a task will give the delay
         7876    92005750        100000000       24001500
 IO      count   delay total
         0       0
-MEM     count   delay total
+SWAP    count   delay total
+        0       0
+RECLAIM count   delay total
         0       0
 Get delays seen in executing a given simple command
         6       4000250         4000000         0
 IO      count   delay total
         0       0
-MEM     count   delay total
+SWAP    count   delay total
+        0       0
+RECLAIM count   delay total
         0       0
                "      %15llu%15llu%15llu%15llu\n"
                "IO    %15s%15s\n"
                "      %15llu%15llu\n"
-               "MEM   %15s%15s\n"
+               "SWAP  %15s%15s\n"
+               "      %15llu%15llu\n"
+               "RECLAIM  %12s%15s\n"
                "      %15llu%15llu\n",
                "count", "real total", "virtual total", "delay total",
                t->cpu_count, t->cpu_run_real_total, t->cpu_run_virtual_total,
                t->cpu_delay_total,
                "count", "delay total",
                t->blkio_count, t->blkio_delay_total,
-               "count", "delay total", t->swapin_count, t->swapin_delay_total);
+               "count", "delay total", t->swapin_count, t->swapin_delay_total,
+               "count", "delay total",
+               t->freepages_count, t->freepages_delay_total);
 }
 void task_context_switch_counts(struct taskstats *t)

/* atmdev.h - ATM device driver declarations and various related items */ /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ #ifndef LINUX_ATMDEV_H #define LINUX_ATMDEV_H #include <linux/atmapi.h> #include <linux/atm.h> #include <linux/atmioc.h> #define ESI_LEN 6 #define ATM_OC3_PCR (155520000/270*260/8/53) /* OC3 link rate: 155520000 bps SONET overhead: /270*260 (9 section, 1 path) bits per cell: /8/53 max cell rate: 353207.547 cells/sec */ #define ATM_25_PCR ((25600000/8-8000)/54) /* 25 Mbps ATM cell rate (59111) */ #define ATM_OC12_PCR (622080000/1080*1040/8/53) /* OC12 link rate: 622080000 bps SONET overhead: /1080*1040 bits per cell: /8/53 max cell rate: 1412830.188 cells/sec */ #define ATM_DS3_PCR (8000*12) /* DS3: 12 cells in a 125 usec time slot */ #define __AAL_STAT_ITEMS \ __HANDLE_ITEM(tx); /* TX okay */ \ __HANDLE_ITEM(tx_err); /* TX errors */ \ __HANDLE_ITEM(rx); /* RX okay */ \ __HANDLE_ITEM(rx_err); /* RX errors */ \ __HANDLE_ITEM(rx_drop); /* RX out of memory */ struct atm_aal_stats { #define __HANDLE_ITEM(i) int i __AAL_STAT_ITEMS #undef __HANDLE_ITEM }; struct atm_dev_stats { struct atm_aal_stats aal0; struct atm_aal_stats aal34; struct atm_aal_stats aal5; } __ATM_API_ALIGN; #define ATM_GETLINKRATE _IOW('a',ATMIOC_ITF+1,struct atmif_sioc) /* get link rate */ #define ATM_GETNAMES _IOW('a',ATMIOC_ITF+3,struct atm_iobuf) /* get interface names (numbers) */ #define ATM_GETTYPE _IOW('a',ATMIOC_ITF+4,struct atmif_sioc) /* get interface type name */ #define ATM_GETESI _IOW('a',ATMIOC_ITF+5,struct atmif_sioc) /* get interface ESI */ #define ATM_GETADDR _IOW('a',ATMIOC_ITF+6,struct atmif_sioc) /* get itf's local ATM addr. list */ #define ATM_RSTADDR _IOW('a',ATMIOC_ITF+7,struct atmif_sioc) /* reset itf's ATM address list */ #define ATM_ADDADDR _IOW('a',ATMIOC_ITF+8,struct atmif_sioc) /* add a local ATM address */ #define ATM_DELADDR _IOW('a',ATMIOC_ITF+9,struct atmif_sioc) /* remove a local ATM address */ #define ATM_GETCIRANGE _IOW('a',ATMIOC_ITF+10,struct atmif_sioc) /* get connection identifier range */ #define ATM_SETCIRANGE _IOW('a',ATMIOC_ITF+11,struct atmif_sioc) /* set connection identifier range */ #define ATM_SETESI _IOW('a',ATMIOC_ITF+12,struct atmif_sioc) /* set interface ESI */ #define ATM_SETESIF _IOW('a',ATMIOC_ITF+13,struct atmif_sioc) /* force interface ESI */ #define ATM_ADDLECSADDR _IOW('a', ATMIOC_ITF+14, struct atmif_sioc) /* register a LECS address */ #define ATM_DELLECSADDR _IOW('a', ATMIOC_ITF+15, struct atmif_sioc) /* unregister a LECS address */ #define ATM_GETLECSADDR _IOW('a', ATMIOC_ITF+16, struct atmif_sioc) /* retrieve LECS address(es) */ #define ATM_GETSTAT _IOW('a',ATMIOC_SARCOM+0,struct atmif_sioc) /* get AAL layer statistics */ #define ATM_GETSTATZ _IOW('a',ATMIOC_SARCOM+1,struct atmif_sioc) /* get AAL layer statistics and zero */ #define ATM_GETLOOP _IOW('a',ATMIOC_SARCOM+2,struct atmif_sioc) /* get loopback mode */ #define ATM_SETLOOP _IOW('a',ATMIOC_SARCOM+3,struct atmif_sioc) /* set loopback mode */ #define ATM_QUERYLOOP _IOW('a',ATMIOC_SARCOM+4,struct atmif_sioc) /* query supported loopback modes */ #define ATM_SETSC _IOW('a',ATMIOC_SPECIAL+1,int) /* enable or disable single-copy */ #define ATM_SETBACKEND _IOW('a',ATMIOC_SPECIAL+2,atm_backend_t) /* set backend handler */ #define ATM_NEWBACKENDIF _IOW('a',ATMIOC_SPECIAL+3,atm_backend_t) /* use backend to make new if */ #define ATM_ADDPARTY _IOW('a', ATMIOC_SPECIAL+4,struct atm_iobuf) /* add party to p2mp call */ #ifdef CONFIG_COMPAT /* It actually takes struct sockaddr_atmsvc, not struct atm_iobuf */ #define COMPAT_ATM_ADDPARTY _IOW('a', ATMIOC_SPECIAL+4,struct compat_atm_iobuf) #endif #define ATM_DROPPARTY _IOW('a', ATMIOC_SPECIAL+5,int) /* drop party from p2mp call */ /* * These are backend handkers that can be set via the ATM_SETBACKEND call * above. In the future we may support dynamic loading of these - for now, * they're just being used to share the ATMIOC_BACKEND ioctls */ #define ATM_BACKEND_RAW 0 #define ATM_BACKEND_PPP 1 /* PPPoATM - RFC2364 */ #define ATM_BACKEND_BR2684 2 /* Bridged RFC1483/2684 */ /* for ATM_GETTYPE */ #define ATM_ITFTYP_LEN 8 /* maximum length of interface type name */ /* * Loopback modes for ATM_{PHY,SAR}_{GET,SET}LOOP */ /* Point of loopback CPU-->SAR-->PHY-->line--> ... */ #define __ATM_LM_NONE 0 /* no loop back ^ ^ ^ ^ */ #define __ATM_LM_AAL 1 /* loop back PDUs --' | | | */ #define __ATM_LM_ATM 2 /* loop back ATM cells ---' | | */ /* RESERVED 4 loop back on PHY side ---' */ #define __ATM_LM_PHY 8 /* loop back bits (digital) ----' | */ #define __ATM_LM_ANALOG 16 /* loop back the analog signal --------' */ /* Direction of loopback */ #define __ATM_LM_MKLOC(n) ((n)) /* Local (i.e. loop TX to RX) */ #define __ATM_LM_MKRMT(n) ((n) << 8) /* Remote (i.e. loop RX to TX) */ #define __ATM_LM_XTLOC(n) ((n) & 0xff) #define __ATM_LM_XTRMT(n) (((n) >> 8) & 0xff) #define ATM_LM_NONE 0 /* no loopback */ #define ATM_LM_LOC_AAL __ATM_LM_MKLOC(__ATM_LM_AAL) #define ATM_LM_LOC_ATM __ATM_LM_MKLOC(__ATM_LM_ATM) #define ATM_LM_LOC_PHY __ATM_LM_MKLOC(__ATM_LM_PHY) #define ATM_LM_LOC_ANALOG __ATM_LM_MKLOC(__ATM_LM_ANALOG) #define ATM_LM_RMT_AAL __ATM_LM_MKRMT(__ATM_LM_AAL) #define ATM_LM_RMT_ATM __ATM_LM_MKRMT(__ATM_LM_ATM) #define ATM_LM_RMT_PHY __ATM_LM_MKRMT(__ATM_LM_PHY) #define ATM_LM_RMT_ANALOG __ATM_LM_MKRMT(__ATM_LM_ANALOG) /* * Note: ATM_LM_LOC_* and ATM_LM_RMT_* can be combined, provided that * __ATM_LM_XTLOC(x) <= __ATM_LM_XTRMT(x) */ struct atm_iobuf { int length; void __user *buffer; }; /* for ATM_GETCIRANGE / ATM_SETCIRANGE */ #define ATM_CI_MAX -1 /* use maximum range of VPI/VCI */ struct atm_cirange { signed char vpi_bits; /* 1..8, ATM_CI_MAX (-1) for maximum */ signed char vci_bits; /* 1..16, ATM_CI_MAX (-1) for maximum */ }; /* for ATM_SETSC; actually taken from the ATM_VF number space */ #define ATM_SC_RX 1024 /* enable RX single-copy */ #define ATM_SC_TX 2048 /* enable TX single-copy */ #define ATM_BACKLOG_DEFAULT 32 /* if we get more, we're likely to time out anyway */ /* MF: change_qos (Modify) flags */ #define ATM_MF_IMMED 1 /* Block until change is effective */ #define ATM_MF_INC_RSV 2 /* Change reservation on increase */ #define ATM_MF_INC_SHP 4 /* Change shaping on increase */ #define ATM_MF_DEC_RSV 8 /* Change reservation on decrease */ #define ATM_MF_DEC_SHP 16 /* Change shaping on decrease */ #define ATM_MF_BWD 32 /* Set the backward direction parameters */ #define ATM_MF_SET (ATM_MF_INC_RSV | ATM_MF_INC_SHP | ATM_MF_DEC_RSV | \ ATM_MF_DEC_SHP | ATM_MF_BWD) /* * ATM_VS_* are used to express VC state in a human-friendly way. */ #define ATM_VS_IDLE 0 /* VC is not used */ #define ATM_VS_CONNECTED 1 /* VC is connected */ #define ATM_VS_CLOSING 2 /* VC is closing */ #define ATM_VS_LISTEN 3 /* VC is listening for incoming setups */ #define ATM_VS_INUSE 4 /* VC is in use (registered with atmsigd) */ #define ATM_VS_BOUND 5 /* VC is bound */ #define ATM_VS2TXT_MAP \ "IDLE", "CONNECTED", "CLOSING", "LISTEN", "INUSE", "BOUND" #define ATM_VF2TXT_MAP \ "ADDR", "READY", "PARTIAL", "REGIS", \ "RELEASED", "HASQOS", "LISTEN", "META", \ "256", "512", "1024", "2048", \ "SESSION", "HASSAP", "BOUND", "CLOSE" #ifdef __KERNEL__ #include <linux/device.h> #include <linux/wait.h> /* wait_queue_head_t */ #include <linux/time.h> /* struct timeval */ #include <linux/net.h> #include <linux/skbuff.h> /* struct sk_buff */ #include <linux/uio.h> #include <net/sock.h> #include <asm/atomic.h> #ifdef CONFIG_PROC_FS #include <linux/proc_fs.h> extern struct proc_dir_entry *atm_proc_root; #endif #ifdef CONFIG_COMPAT #include <linux/compat.h> struct compat_atm_iobuf { int length; compat_uptr_t buffer; }; #endif struct k_atm_aal_stats { #define __HANDLE_ITEM(i) atomic_t i __AAL_STAT_ITEMS #undef __HANDLE_ITEM }; struct k_atm_dev_stats { struct k_atm_aal_stats aal0; struct k_atm_aal_stats aal34; struct k_atm_aal_stats aal5; }; enum { ATM_VF_ADDR, /* Address is in use. Set by anybody, cleared by device driver. */ ATM_VF_READY, /* VC is ready to transfer data. Set by device driver, cleared by anybody. */ ATM_VF_PARTIAL, /* resources are bound to PVC (partial PVC setup), controlled by socket layer */ ATM_VF_REGIS, /* registered with demon, controlled by SVC socket layer */ ATM_VF_BOUND, /* local SAP is set, controlled by SVC socket layer */ ATM_VF_RELEASED, /* demon has indicated/requested release, controlled by SVC socket layer */ ATM_VF_HASQOS, /* QOS parameters have been set */ ATM_VF_LISTEN, /* socket is used for listening */ ATM_VF_META, /* SVC socket isn't used for normal data traffic and doesn't depend on signaling to be available */ ATM_VF_SESSION, /* VCC is p2mp session control descriptor */ ATM_VF_HASSAP, /* SAP has been set */ ATM_VF_CLOSE, /* asynchronous close - treat like VF_RELEASED*/ ATM_VF_WAITING, /* waiting for reply from sigd */ ATM_VF_IS_CLIP, /* in use by CLIP protocol */ }; #define ATM_VF2VS(flags) \ (test_bit(ATM_VF_READY,&(flags)) ? ATM_VS_CONNECTED : \ test_bit(ATM_VF_RELEASED,&(flags)) ? ATM_VS_CLOSING : \ test_bit(ATM_VF_LISTEN,&(flags)) ? ATM_VS_LISTEN : \ test_bit(ATM_VF_REGIS,&(flags)) ? ATM_VS_INUSE : \ test_bit(ATM_VF_BOUND,&(flags)) ? ATM_VS_BOUND : ATM_VS_IDLE) enum { ATM_DF_REMOVED, /* device was removed from atm_devs list */ }; #define ATM_PHY_SIG_LOST 0 /* no carrier/light */ #define ATM_PHY_SIG_UNKNOWN 1 /* carrier/light status is unknown */ #define ATM_PHY_SIG_FOUND 2 /* carrier/light okay */ #define ATM_ATMOPT_CLP 1 /* set CLP bit */ struct atm_vcc { /* struct sock has to be the first member of atm_vcc */ struct sock sk; unsigned long flags; /* VCC flags (ATM_VF_*) */ short vpi; /* VPI and VCI (types must be equal */ /* with sockaddr) */ int vci; unsigned long aal_options; /* AAL layer options */ unsigned long atm_options; /* ATM layer options */ struct atm_dev *dev; /* device back pointer */ struct atm_qos qos; /* QOS */ struct atm_sap sap; /* SAP */ void (*push)(struct atm_vcc *vcc,struct sk_buff *skb); void (*pop)(struct atm_vcc *vcc,struct sk_buff *skb); /* optional */ int (*push_oam)(struct atm_vcc *vcc,void *cell); int (*send)(struct atm_vcc *vcc,struct sk_buff *skb); void *dev_data; /* per-device data */ void *proto_data; /* per-protocol data */ struct k_atm_aal_stats *stats; /* pointer to AAL stats group */ /* SVC part --- may move later ------------------------------------- */ short itf; /* interface number */ struct sockaddr_atmsvc local; struct sockaddr_atmsvc remote; /* Multipoint part ------------------------------------------------- */ struct atm_vcc *session; /* session VCC descriptor */ /* Other stuff ----------------------------------------------------- */ void *user_back; /* user backlink - not touched by */ /* native ATM stack. Currently used */ /* by CLIP and sch_atm. */ }; static inline struct atm_vcc *atm_sk(struct sock *sk) { return (struct atm_vcc *)sk; } static inline struct atm_vcc *ATM_SD(struct socket *sock) { return atm_sk(sock->sk); } static inline struct sock *sk_atm(struct atm_vcc *vcc) { return (struct sock *)vcc; } struct atm_dev_addr { struct sockaddr_atmsvc addr; /* ATM address */ struct list_head entry; /* next address */ }; enum atm_addr_type_t { ATM_ADDR_LOCAL, ATM_ADDR_LECS }; struct atm_dev { const struct atmdev_ops *ops; /* device operations; NULL if unused */ const struct atmphy_ops *phy; /* PHY operations, may be undefined */ /* (NULL) */ const char *type; /* device type name */ int number; /* device index */ void *dev_data; /* per-device data */ void *phy_data; /* private PHY date */ unsigned long flags; /* device flags (ATM_DF_*) */ struct list_head local; /* local ATM addresses */ struct list_head lecs; /* LECS ATM addresses learned via ILMI */ unsigned char esi[ESI_LEN]; /* ESI ("MAC" addr) */ struct atm_cirange ci_range; /* VPI/VCI range */ struct k_atm_dev_stats stats; /* statistics */ char signal; /* signal status (ATM_PHY_SIG_*) */ int link_rate; /* link rate (default: OC3) */ atomic_t refcnt; /* reference count */ spinlock_t lock; /* protect internal members */ #ifdef CONFIG_PROC_FS struct proc_dir_entry *proc_entry; /* proc entry */ char *proc_name; /* proc entry name */ #endif struct device class_dev; /* sysfs device */ struct list_head dev_list; /* linkage */ }; /* OF: send_Oam Flags */ #define ATM_OF_IMMED 1 /* Attempt immediate delivery */ #define ATM_OF_INRATE 2 /* Attempt in-rate delivery */ /* * ioctl, getsockopt, and setsockopt are optional and can be set to NULL. */ struct atmdev_ops { /* only send is required */ void (*dev_close)(struct atm_dev *dev); int (*open)(struct atm_vcc *vcc); void (*close)(struct atm_vcc *vcc); int (*ioctl)(struct atm_dev *dev,unsigned int cmd,void __user *arg); #ifdef CONFIG_COMPAT int (*compat_ioctl)(struct atm_dev *dev,unsigned int cmd, void __user *arg); #endif int (*getsockopt)(struct atm_vcc *vcc,int level,int optname, void __user *optval,int optlen); int (*setsockopt)(struct atm_vcc *vcc,int level,int optname, void __user *optval,int optlen); int (*send)(struct atm_vcc *vcc,struct sk_buff *skb); int (*send_oam)(struct atm_vcc *vcc,void *cell,int flags); void (*phy_put)(struct atm_dev *dev,unsigned char value, unsigned long addr); unsigned char (*phy_get)(struct atm_dev *dev,unsigned long addr); int (*change_qos)(struct atm_vcc *vcc,struct atm_qos *qos,int flags); int (*proc_read)(struct atm_dev *dev,loff_t *pos,char *page); struct module *owner; }; struct atmphy_ops { int (*start)(struct atm_dev *dev); int (*ioctl)(struct atm_dev *dev,unsigned int cmd,void __user *arg); void (*interrupt)(struct atm_dev *dev); int (*stop)(struct atm_dev *dev); }; struct atm_skb_data { struct atm_vcc *vcc; /* ATM VCC */ unsigned long atm_options; /* ATM layer options */ }; #define VCC_HTABLE_SIZE 32 extern struct hlist_head vcc_hash[VCC_HTABLE_SIZE]; extern rwlock_t vcc_sklist_lock; #define ATM_SKB(skb) (((struct atm_skb_data *) (skb)->cb)) struct atm_dev *atm_dev_register(const char *type,const struct atmdev_ops *ops, int number,unsigned long *flags); /* number == -1: pick first available */ struct atm_dev *atm_dev_lookup(int number); void atm_dev_deregister(struct atm_dev *dev); void vcc_insert_socket(struct sock *sk); /* * This is approximately the algorithm used by alloc_skb. * */ static inline int atm_guess_pdu2truesize(int size) { return (SKB_DATA_ALIGN(size) + sizeof(struct skb_shared_info)); } static inline void atm_force_charge(struct atm_vcc *vcc,int truesize) { atomic_add(truesize, &sk_atm(vcc)->sk_rmem_alloc); } static inline void atm_return(struct atm_vcc *vcc,int truesize) { atomic_sub(truesize, &sk_atm(vcc)->sk_rmem_alloc); } static inline int atm_may_send(struct atm_vcc *vcc,unsigned int size) { return (size + atomic_read(&sk_atm(vcc)->sk_wmem_alloc)) < sk_atm(vcc)->sk_sndbuf; } static inline void atm_dev_hold(struct atm_dev *dev) { atomic_inc(&dev->refcnt); } static inline void atm_dev_put(struct atm_dev *dev) { if (atomic_dec_and_test(&dev->refcnt)) { BUG_ON(!test_bit(ATM_DF_REMOVED, &dev->flags)); if (dev->ops->dev_close) dev->ops->dev_close(dev); put_device(&dev->class_dev); } } int atm_charge(struct atm_vcc *vcc,int truesize); struct sk_buff *atm_alloc_charge(struct atm_vcc *vcc,int pdu_size, gfp_t gfp_flags); int atm_pcr_goal(const struct atm_trafprm *tp); void vcc_release_async(struct atm_vcc *vcc, int reply); struct atm_ioctl { struct module *owner; /* A module reference is kept if appropriate over this call. * Return -ENOIOCTLCMD if you don't handle it. */ int (*ioctl)(struct socket *, unsigned int cmd, unsigned long arg); struct list_head list; }; /** * register_atm_ioctl - register handler for ioctl operations * * Special (non-device) handlers of ioctl's should * register here. If you're a normal device, you should * set .ioctl in your atmdev_ops instead. */ void register_atm_ioctl(struct atm_ioctl *); /** * deregister_atm_ioctl - remove the ioctl handler */ void deregister_atm_ioctl(struct atm_ioctl *); #endif /* __KERNEL__ */ #endif


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