Keika Kobayashi
aa0ce5bbc2
softirq: introduce statistics for softirq ...
Statistics for softirq doesn't exist.
It will be helpful like statistics for interrupts.
This patch introduces counting the number of softirq,
which will be exported in /proc/softirqs.
When softirq handler consumes much CPU time,
/proc/stat is like the following.
$ while :; do cat /proc/stat | head -n1 ; sleep 10 ; done
cpu 88 0 408 739665 583 28 2 0 0
cpu 450 0 1090 740970 594 28 1294 0 0
^^^^
softirq
In such a situation,
/proc/softirqs shows us which softirq handler is invoked.
We can see the increase rate of softirqs.
<before>
$ cat /proc/softirqs
CPU0 CPU1 CPU2 CPU3
HI 0 0 0 0
TIMER 462850 462805 462782 462718
NET_TX 0 0 0 365
NET_RX 2472 2 2 40
BLOCK 0 0 381 1164
TASKLET 0 0 0 224
SCHED 462654 462689 462698 462427
RCU 3046 2423 3367 3173
<after>
$ cat /proc/softirqs
CPU0 CPU1 CPU2 CPU3
HI 0 0 0 0
TIMER 463361 465077 465056 464991
NET_TX 53 0 1 365
NET_RX 3757 2 2 40
BLOCK 0 0 398 1170
TASKLET 0 0 0 224
SCHED 463074 464318 464612 463330
RCU 3505 2948 3947 3673
When CPU TIME of softirq is high,
the rates of increase is the following.
TIMER : 220/sec : CPU1-3
NET_TX : 5/sec : CPU0
NET_RX : 120/sec : CPU0
SCHED : 40-200/sec : all CPU
RCU : 45-58/sec : all CPU
The rates of increase in an idle mode is the following.
TIMER : 250/sec
SCHED : 250/sec
RCU : 2/sec
It seems many softirqs for receiving packets and rcu are invoked. This
gives us help for checking system.
Signed-off-by: Keika Kobayashi <kobayashi.kk@ncos.nec.co.jp>
Reviewed-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Eric Dumazet <dada1@cosmosbay.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18 13:03:40 -07:00
Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm
2009-06-14 13:42:43 -07:00
can: sja1000: generic OF platform bus driver
2009-06-01 02:53:35 -07:00
isdn: rename capi_ctr_reseted() to capi_ctr_down()
2009-06-08 00:45:50 -07:00
mfd: fix tmio related warnings
2009-06-17 19:41:52 +02:00
IB/mlx4: Add strong ordering to local inval and fast reg work requests
2009-06-05 10:36:24 -07:00
V4L/DVB (11239): sdio: add cards ids for sms (Siano Mobile Silicon) MDTV receivers
2009-06-16 19:14:16 -03:00
UBI: add notification API
2009-06-02 13:53:35 +03:00
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6
2009-06-11 16:00:49 +02:00
switch rqst_exp_parent()
2009-06-11 21:36:00 -04:00
regulator/max1586: support increased V3 voltage range
2009-06-15 11:18:26 +01:00
net/libertas: remove GPIO-CS handling in SPI interface code
2009-06-10 13:27:50 -04:00
SUNRPC: Fix the problem of EADDRNOTAVAIL syslog floods on reconnect
2009-05-02 16:35:08 -07:00
USB: Change names of SuperSpeed ep companion descriptor structs.
2009-06-15 21:44:50 -07:00
wimax/i2400m: rename misleading I2400M_PL_PAD to I2400M_PL_ALIGN
2009-06-11 03:30:20 -07:00
irq: change ACPI GSI APIs to also take a device argument
2009-04-28 12:21:17 +02:00
Cleanup of adfs headers
2009-06-17 00:36:36 -04:00
libata: Media rotation rate and form factor heuristics
2009-05-15 14:14:56 -04:00
headers_check fix: linux/auto_fs.h
2009-06-01 06:21:13 +00:00
alpha: binfmt_aout fix
2009-05-02 15:36:10 -07:00
block: Add bio_list_peek()
2009-06-15 16:47:21 +10:00
bitops: Add __ffs64 bitop
2009-04-23 10:06:35 +01:00
block: Introduce helper to reset queue limits to default values
2009-06-16 08:23:52 +02:00
tracing/events: convert block trace points to TRACE_EVENT(), fix !CONFIG_BLOCK
2009-06-10 11:55:06 +02:00
Add block_write_full_page_endio for passing endio handler
2009-04-16 07:47:49 -07:00
headers: move module_bug_finalize()/module_bug_cleanup() definitions into module.h
2009-06-16 19:47:48 -07:00
c2port: annotate bitfield for kmemcheck
2009-06-15 15:49:34 +02:00
add some long-missing capabilities to fs_mask
2009-04-13 08:32:28 -07:00
cb710: more cleanup for the DEBUG case.
2009-06-13 22:42:59 +02:00
fs: Remove i_cindex from struct inode
2009-06-11 21:36:09 -04:00
[ARM] 5536/1: Move clk_add_alias() to arch/arm/common/clkdev.c
2009-06-04 17:45:43 +01:00
timers: Logic to move non pinned timers
2009-05-13 16:52:42 +02:00
clocksource: setup mult_orig in clocksource_enable()
2009-05-02 11:45:15 +02:00
signals: implement sys_rt_tgsigqueueinfo
2009-04-30 19:24:24 +02:00
module_param: add __same_type convenience wrapper for __builtin_types_compatible_p
2009-06-12 21:46:57 +09:30
cpumask: introduce zalloc_cpumask_var
2009-06-09 22:30:26 +09:30
cpuset,mm: update tasks' mems_allowed in time
2009-06-16 19:47:31 -07:00
linux/magic.h: move cramfs magic out of cramfs_fs.h
2009-06-11 21:36:10 -04:00
cred: #include init.h in cred.h
2009-05-29 08:40:01 -07:00
tty: cyclades, remove typedefs
2009-06-11 08:50:57 -07:00
dcache: extrace and use d_unlinked()
2009-06-11 21:36:06 -04:00
lockdep: warn about lockdep disabling after kernel taint, fix
2009-04-14 11:11:52 +02:00
block: Do away with the notion of hardsect_size
2009-05-22 23:22:54 +02:00
Driver Core: add nodename callbacks
2009-06-15 21:30:25 -07:00
dlm: Make name input parameter of {,dlm_}new_lockspace() const
2009-05-07 10:14:26 -05:00
dma-debug: add dma_debug_resize_entries() to adjust the number of dma_debug_entries
2009-04-15 12:22:37 +02:00
ioatdma: fix "ioatdma frees DMA memory with wrong function"
2009-05-12 14:41:47 -07:00
x86: x2apic, IR: Clean up X86_X2APIC and INTR_REMAP config checks
2009-04-21 09:08:25 +02:00
dnotify: reimplement dnotify using fsnotify
2009-06-11 14:57:53 -04:00
Driver core: remove pr_fmt() from dynamic_dev_dbg() printk
2009-04-16 16:17:11 -07:00
[IA64] Convert ia64 to use int-ll64.h
2009-06-17 09:33:49 -07:00
eisa: remove driver_data direct access of struct device
2009-06-15 21:30:26 -07:00
block: implement and enforce request peek/start/fetch
2009-05-11 09:52:18 +02:00
net: introduce a list of device addresses dev_addr_list (v6)
2009-05-05 12:26:24 -07:00
e1000e: Expose MDI-X status via ethtool change
2009-06-09 05:25:36 -07:00
fbdev: blackfin has __raw I/O accessors, so use them in fb.h
2009-06-16 19:48:01 -07:00
include/linux/fiemap.h: include types.h now that it's exported
2009-04-13 15:04:30 -07:00
firewire: core: use more outbound tlabels
2009-06-14 14:23:42 +02:00
firmware_map: fix hang with x86/32bit
2009-06-16 19:47:28 -07:00
firmware: FIRMWARE_NAME_MAX removal
2009-06-15 21:30:25 -07:00
Merge branch 'akpm'
2009-06-16 19:50:13 -07:00
net: Rework fs_enet driver to use of_mdio infrastructure
2009-04-27 02:53:51 -07:00
Merge branch 'merge' of git://git.secretlab.ca/git/linux-2.6 into merge
2009-04-22 13:02:09 +10:00
fsnotify: move events should indicate the event was on a child
2009-06-11 14:57:54 -04:00
inotify: reimplement inotify using fsnotify
2009-06-11 14:57:54 -04:00
tracing: add same level recursion detection
2009-04-17 16:21:32 -04:00
tracing: make trace pipe recognize latency format flag
2009-06-01 23:26:02 -04:00
CUSE: implement CUSE - Character device in Userspace
2009-06-09 11:24:11 +02:00
futex: remove FUTEX_REQUEUE_PI (non CMP)
2009-04-30 11:41:35 +02:00
Driver Core: block: add nodename support for block drivers.
2009-06-15 21:30:25 -07:00
Merge branch 'akpm'
2009-06-16 19:50:13 -07:00
HID: add new multitouch and digitizer contants
2009-05-20 15:48:35 +02:00
mm: check the argument of kunmap on architectures without highmem
2009-06-16 19:47:41 -07:00
clocksource: prevent selection of low resolution clocksourse also for nohz=on
2009-06-13 12:00:26 +02:00
mm: introduce PageHuge() for testing huge/gigantic pages
2009-06-16 19:47:36 -07:00
i2c-ocores: Can add I2C devices to the bus
2009-06-13 10:39:28 +01:00
i2c: Fix sparse warnings for I2C_BOARD_INFO()
2009-04-13 17:02:14 +02:00
i7300_idle: allow testing on i5000-series hardware w/o re-compile
2009-05-28 20:52:40 -04:00
Merge branch 'for-2.6.31' of git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6
2009-06-11 10:00:03 -07:00
cfg80211: use key size constants
2009-06-03 14:05:10 -04:00
net: release dst entry in dev_hard_start_xmit()
2009-05-18 22:19:19 -07:00
Add constants for the ieee 802.15.4 stack
2009-06-09 05:25:30 -07:00
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
2009-06-15 03:02:23 -07:00
af_packet: Teach to listen for multiple unicast addresses.
2009-05-21 15:13:39 -07:00
tun: add IFF_TUN_EXCL flag to avoid opening a persistent device.
2009-04-27 03:23:54 -07:00
sit: stateless autoconf for isatap
2009-05-19 16:02:02 -07:00
gro: New frags interface to avoid copying shinfo
2009-04-16 02:02:07 -07:00
integrity: path_check update
2009-05-22 09:43:41 +10:00
ipv4: New multicast-all socket option
2009-06-02 00:45:24 -07:00
fbdev: move logo externs to header file
2009-06-16 19:47:57 -07:00
mm: consolidate init_mm definition
2009-06-16 19:47:28 -07:00
Input: multitouch - add tracking ID to the protocol
2009-05-23 09:53:18 -07:00
Merge commit 'linus/master' into HEAD
2009-06-15 15:50:49 +02:00
block: prevent possible io_context->refcount overflow
2009-06-10 23:07:15 +02:00
ipmi: add oem message handling
2009-04-21 13:41:48 -07:00
ipmi: add oem message handling
2009-04-21 13:41:48 -07:00
IPv6: Add 'autoconf' and 'disable_ipv6' module parameters
2009-06-01 03:07:33 -07:00
x86: remove some alloc_bootmem_cpumask_var calling
2009-06-11 19:27:07 +03:00
jbd: use SWRITE_SYNC_PLUG when writing synchronous revoke records
2009-04-14 10:10:47 -04:00
jbd2: use SWRITE_SYNC_PLUG when writing synchronous revoke records
2009-04-14 07:50:56 -04:00
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
2009-06-15 03:02:23 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6
2009-06-16 12:57:37 -07:00
softirq: introduce statistics for softirq
2009-06-18 13:03:40 -07:00
keyboard: advertise KT_DEAD2 extended diacriticals
2009-06-14 13:50:36 -07:00
kmemcheck: introduce bitfield API
2009-06-15 15:49:23 +02:00
kmemleak: Add the base support
2009-06-11 17:03:28 +01:00
tracing/events: move trace point headers into include/trace/events
2009-04-14 22:05:43 -04:00
KVM: Make kvm header C++ friendly
2009-06-10 11:48:39 +03:00
KVM: protect assigned dev workqueue, int handler and irq acker
2009-06-10 11:48:53 +03:00
KVM: APIC: get rid of deliver_bitmask
2009-06-10 11:48:27 +03:00
lguest: improve interrupt handling, speed up stream networking
2009-06-12 22:27:03 +09:30
lguest: remove obsolete LHREQ_BREAK call
2009-06-12 22:27:11 +09:30
ata: Report 16/32bit PIO as best we can
2009-04-16 15:28:23 -04:00
fbdev: move logo externs to header file
2009-06-16 19:47:57 -07:00
lis3: add click function
2009-06-16 19:47:57 -07:00
list_nulls: add hlist_nulls_add_head and hlist_nulls_del
2009-06-13 12:28:57 +02:00
loop: use BIO list management functions
2009-04-28 07:37:28 +02:00
smack: implement logging V3
2009-04-14 09:00:19 +10:00
linux/magic.h: move cramfs magic out of cramfs_fs.h
2009-06-11 21:36:10 -04:00
drbd: add major number to major.h
2009-06-16 19:47:48 -07:00
mdio: Expose 10GBASE-T MDI-X status via ethtool
2009-06-11 02:47:10 -07:00
vmscan: evict use-once pages first
2009-06-16 19:47:38 -07:00
mg_disk: seperate mg_disk.h again
2009-06-16 08:40:20 +02:00
mii: Add mii_advertise_flowctrl()
2009-04-29 17:32:35 -07:00
Driver Core: misc: add nodename support for misc devices.
2009-06-15 21:30:25 -07:00
mISDN: Add XHFC support for embedded Speech-Design board to hfcmulti
2009-05-25 00:55:30 -07:00
mISDN: cleanup mISDNhw.h
2009-06-11 19:05:32 +02:00
mISDN: Cleanup debug messages
2009-05-25 00:55:45 -07:00
mm cleanup: shmem_file_setup: 'char *' -> 'const char *' for name argument
2009-06-16 19:47:44 -07:00
Merge branch 'akpm'
2009-06-16 19:50:13 -07:00
mm: fix Committed_AS underflow on large NR_CPUS environment
2009-05-02 15:36:10 -07:00
tracing: x86, mmiotrace: only register for die notifier when tracer active
2009-04-29 11:33:34 +02:00
mm: remove CONFIG_UNEVICTABLE_LRU config option
2009-06-16 19:47:42 -07:00
headers: move module_bug_finalize()/module_bug_cleanup() definitions into module.h
2009-06-16 19:47:48 -07:00
module_param: allow 'bool' module_params to be bool, not just int.
2009-06-12 21:46:58 +09:30
fs: introduce mnt_clone_write
2009-06-11 21:36:02 -04:00
mutex: add atomic_dec_and_mutex_lock(), fix
2009-04-30 09:01:34 +02:00
switch follow_down()
2009-06-11 21:36:01 -04:00
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
2009-06-15 03:02:23 -07:00
netdevice.h: Use frag list abstraction interfaces.
2009-06-09 00:17:27 -07:00
nl80211: Add RSC configuration for new keys
2009-05-13 15:44:39 -04:00
net: add NL802154 interface for configuration of 802.15.4 devices
2009-06-09 05:25:33 -07:00
NLS: update handling of Unicode
2009-06-15 21:44:43 -07:00
page allocator: use a pre-calculated value instead of num_online_nodes() in fast paths
2009-06-16 19:47:35 -07:00
net: introduce pre-up netdev notifier
2009-06-03 14:05:12 -04:00
of: add of_parse_phandle() helper for parsing phandle properties
2009-04-27 02:53:45 -07:00
openfirmware: Add OF phylib support code
2009-04-27 02:53:47 -07:00
of: make of_(un)register_platform_driver common code
2009-05-02 15:36:10 -07:00
Merge branches 'slab/documentation', 'slab/fixes', 'slob/cleanups' and 'slub/fixes' into for-linus
2009-06-17 08:30:15 +03:00
memcg: fix page_cgroup fatal error in FLATMEM
2009-06-12 11:00:54 +03:00
mm: remove CONFIG_UNEVICTABLE_LRU config option
2009-06-16 19:47:42 -07:00
parport: quickfix the proc registration bug
2009-06-02 09:53:22 -07:00
PCI: add power-state name strings
2009-06-15 21:44:44 -07:00
USB: xhci: BIOS handoff and HW initialization.
2009-06-15 21:44:48 -07:00
PCI: only save/restore existent registers in the PCIe capability
2009-04-22 15:59:41 -07:00
PERCPU: Collect the DECLARE/DEFINE declarations together
2009-04-21 19:40:00 -07:00
kmemleak: Remove some of the kmemleak false positives
2009-06-11 17:04:18 +01:00
perf_counter: Add forward/backward attribute ABI compatibility
2009-06-12 14:28:52 +02:00
phy: Eliminate references to BUS_ID_SIZE.
2009-05-26 21:16:25 -07:00
splice: implement default splice_read method
2009-05-11 14:13:10 +02:00
pktcdvd.h should include mempool.h
2009-04-24 08:54:21 +02:00
driver core: Const-correct platform getbyname functions
2009-06-15 21:30:24 -07:00
PM core: rename suspend and resume functions
2009-06-12 21:32:31 +02:00
pnp: add PNP resource range checking function
2009-06-05 14:37:41 +00:00
poll: avoid extra wakeups in select/poll
2009-06-16 19:47:48 -07:00
Move junk from proc_fs.h to fs/proc/internal.h
2009-06-11 21:36:01 -04:00
fs/qnx4: sanitize includes
2009-06-11 21:36:12 -04:00
quota: Introduce writeout_quota_sb() (version 4)
2009-06-11 21:36:04 -04:00
radix-tree: add radix_tree_prev_hole()
2009-06-16 19:47:30 -07:00
lib: isolate rational fractions helper function
2009-06-11 08:51:08 -07:00
rculist.h: introduce list_entry_rcu() and list_first_entry_rcu()
2009-04-14 18:41:15 +02:00
rcu: Add __rcu_pending tracing to hierarchical RCU
2009-04-14 11:33:43 +02:00
reiserfs: allow exposing privroot w/ xattrs enabled
2009-06-11 21:35:58 -04:00
reiserfs: fixup perms when xattrs are disabled
2009-05-17 11:45:45 -07:00
rfkill: don't impose global states on resume (just restore the previous states)
2009-06-10 13:28:37 -04:00
trace: annotate bitfields in struct ring_buffer_event
2009-06-15 15:49:37 +02:00
vmscan: report vm_flags in page_referenced()
2009-06-16 19:47:44 -07:00
romfs: cleanup romfs_fs.h
2009-05-09 10:49:41 -04:00
Merge branch 'akpm'
2009-06-16 19:50:13 -07:00
sctp: fix error cause codes of ADD-IP extension
2009-06-03 09:14:45 -04:00
<linux/seccomp.h> needs to include <linux/errno.h>.
2009-04-19 10:47:45 -07:00
security: use mmap_min_addr indepedently of security models
2009-06-04 12:07:48 +10:00
serial: refactor ASYNC_ flags
2009-06-11 08:50:58 -07:00
serial: Added Timberdale UART driver
2009-06-11 08:51:06 -07:00
sh-sci: improve clock framework support
2009-05-08 23:22:26 +09:00
sh: Consolidate MTU2/CMT/TMU timer platform data.
2009-05-03 17:57:17 +09:00
hwmon: sht15 humidity sensor driver
2009-04-13 15:04:29 -07:00
signals: implement sys_rt_tgsigqueueinfo
2009-04-30 19:24:24 +02:00
Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/vegard/kmemcheck
2009-06-16 13:09:51 -07:00
Merge commit 'linus/master' into HEAD
2009-06-15 15:50:49 +02:00
slab: move struct kmem_cache to headers
2009-06-13 08:58:43 +02:00
slab,slub: don't enable interrupts during early boot
2009-06-12 18:53:33 +03:00
Trivial: fix a typo in slow-work.h
2009-04-21 19:40:00 -07:00
slab,slub: don't enable interrupts during early boot
2009-06-12 18:53:33 +03:00
remove put_cpu_no_resched()
2009-06-16 19:47:48 -07:00
smsc911x: add fifo byteswap support V2
2009-04-28 01:53:11 -07:00
snmp: add missing counters for RFC 4293
2009-04-27 02:45:02 -07:00
Add constants for the ieee 802.15.4 stack
2009-06-09 05:25:30 -07:00
spinlock: Add missing __raw_spin_lock_flags() stub for UP
2009-06-10 11:48:14 +02:00
splice: fix misleading comment
2009-05-12 11:11:48 +02:00
stacktrace: add forward-declaration struct task_struct
2009-06-12 23:04:12 +02:00
Make __stringify support variable argument macros too
2009-04-10 15:48:52 +02:00
PM/Hibernate: Move NVS routines into a seperate file (v2).
2009-06-12 21:32:33 +02:00
mm: remove file argument from swap_readpage()
2009-06-16 19:47:44 -07:00
syscalls.h: remove duplicated declarations for sys_pipe2
2009-06-16 19:47:52 -07:00
syncookies: remove last_synq_overflow from struct tcp_sock
2009-04-20 02:25:26 -07:00
clocksource: prevent selection of low resolution clocksourse also for nohz=on
2009-06-13 12:00:26 +02:00
timekeeping: create arch_gettimeoffset infrastructure
2009-05-02 11:45:15 +02:00
timers: Framework for identifying pinned timers
2009-05-13 16:52:42 +02:00
time: move PIT_TICK_RATE to linux/timex.h
2009-06-16 19:47:27 -07:00
tracing: add trace_seq_vprint interface
2009-06-09 15:17:32 -04:00
ptrace: tracehook_report_clone: fix false positives
2009-06-04 18:07:40 -07:00
debugfs: Fix terminology inconsistency of dir name to mount debugfs filesystem.
2009-06-15 21:30:28 -07:00
tty: rewrite the ldisc locking
2009-06-11 08:51:01 -07:00
tty: throttling race fix
2009-06-11 08:50:59 -07:00
Trivial: fix typo s/balence/balance/
2009-06-12 18:01:45 +02:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
2009-06-16 13:06:10 -07:00
utsname.h: make new_utsname fields use the proper length constant
2009-06-16 19:47:47 -07:00
V4L/DVB (11970): gspca - ov519: Add support for the ov518 bridge.
2009-06-16 19:07:42 -03:00
virtio: add names to virtqueue struct, mapping from devices to queues.
2009-06-12 22:16:36 +09:30
Add serial number support for virtio_blk, V4a
2009-06-09 14:41:40 +02:00
virtio: teach virtio_has_feature() about transport features
2009-06-12 22:16:38 +09:30
virtio: add missing include to virtio_net.h
2009-05-01 15:34:02 -07:00
virtio_pci: optional MSI-X support
2009-06-12 22:16:37 +09:30
virtio: indirect ring entries (VIRTIO_RING_F_INDIRECT_DESC)
2009-06-12 22:16:39 +09:30
drivers: add support for the TI VLYNQ bus
2009-06-16 19:47:52 -07:00
vmscan: count the number of times zone_reclaim() scans and fails
2009-06-16 19:47:46 -07:00
Merge commit 'v2.6.30-rc5' into sched/core
2009-05-11 12:59:37 +02:00
wimax: a new API call was added, increment minor protocol version number
2009-05-28 18:02:32 -07:00
vfs: Make sys_sync() use fsync_super() (version 4)
2009-06-11 21:36:03 -04:00
