- 11 6月, 2009 1 次提交
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由 Steven Rostedt 提交于
By moving the macro that creates the print format code above the defining of the event macro helpers (__get_str, __print_symbolic, and __get_dynamic_array), we get a little cleaner print format. Instead of: (char *)((void *)REC + REC->__data_loc_name) we get: __get_str(name) Instead of: ({ static const struct trace_print_flags symbols[] = { { HI_SOFTIRQ, "HI" }, { we get: __print_symbolic(REC->vec, { HI_SOFTIRQ, "HI" }, { Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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- 10 6月, 2009 2 次提交
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由 Steven Rostedt 提交于
The sector field is either u64 or unsigned long depending on the arch. This patch casts the sector to unsigned long long to prevent the printf warnings. [ Impact: remove compile warnings ] Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 Li Zefan 提交于
TRACE_EVENT is a more generic way to define tracepoints. Doing so adds these new capabilities to this tracepoint: - zero-copy and per-cpu splice() tracing - binary tracing without printf overhead - structured logging records exposed under /debug/tracing/events - trace events embedded in function tracer output and other plugins - user-defined, per tracepoint filter expressions ... Cons: - no dev_t info for the output of plug, unplug_timer and unplug_io events. no dev_t info for getrq and sleeprq events if bio == NULL. no dev_t info for rq_abort,...,rq_requeue events if rq->rq_disk == NULL. This is mainly because we can't get the deivce from a request queue. But this may change in the future. - A packet command is converted to a string in TP_assign, not TP_print. While blktrace do the convertion just before output. Since pc requests should be rather rare, this is not a big issue. - In blktrace, an event can have 2 different print formats, but a TRACE_EVENT has a unique format, which means we have some unused data in a trace entry. The overhead is minimized by using __dynamic_array() instead of __array(). I've benchmarked the ioctl blktrace vs the splice based TRACE_EVENT tracing: dd dd + ioctl blktrace dd + TRACE_EVENT (splice) 1 7.36s, 42.7 MB/s 7.50s, 42.0 MB/s 7.41s, 42.5 MB/s 2 7.43s, 42.3 MB/s 7.48s, 42.1 MB/s 7.43s, 42.4 MB/s 3 7.38s, 42.6 MB/s 7.45s, 42.2 MB/s 7.41s, 42.5 MB/s So the overhead of tracing is very small, and no regression when using those trace events vs blktrace. And the binary output of TRACE_EVENT is much smaller than blktrace: # ls -l -h -rw-r--r-- 1 root root 8.8M 06-09 13:24 sda.blktrace.0 -rw-r--r-- 1 root root 195K 06-09 13:24 sda.blktrace.1 -rw-r--r-- 1 root root 2.7M 06-09 13:25 trace_splice.out Following are some comparisons between TRACE_EVENT and blktrace: plug: kjournald-480 [000] 303.084981: block_plug: [kjournald] kjournald-480 [000] 303.084981: 8,0 P N [kjournald] unplug_io: kblockd/0-118 [000] 300.052973: block_unplug_io: [kblockd/0] 1 kblockd/0-118 [000] 300.052974: 8,0 U N [kblockd/0] 1 remap: kjournald-480 [000] 303.085042: block_remap: 8,0 W 102736992 + 8 <- (8,8) 33384 kjournald-480 [000] 303.085043: 8,0 A W 102736992 + 8 <- (8,8) 33384 bio_backmerge: kjournald-480 [000] 303.085086: block_bio_backmerge: 8,0 W 102737032 + 8 [kjournald] kjournald-480 [000] 303.085086: 8,0 M W 102737032 + 8 [kjournald] getrq: kjournald-480 [000] 303.084974: block_getrq: 8,0 W 102736984 + 8 [kjournald] kjournald-480 [000] 303.084975: 8,0 G W 102736984 + 8 [kjournald] bash-2066 [001] 1072.953770: 8,0 G N [bash] bash-2066 [001] 1072.953773: block_getrq: 0,0 N 0 + 0 [bash] rq_complete: konsole-2065 [001] 300.053184: block_rq_complete: 8,0 W () 103669040 + 16 [0] konsole-2065 [001] 300.053191: 8,0 C W 103669040 + 16 [0] ksoftirqd/1-7 [001] 1072.953811: 8,0 C N (5a 00 08 00 00 00 00 00 24 00) [0] ksoftirqd/1-7 [001] 1072.953813: block_rq_complete: 0,0 N (5a 00 08 00 00 00 00 00 24 00) 0 + 0 [0] rq_insert: kjournald-480 [000] 303.084985: block_rq_insert: 8,0 W 0 () 102736984 + 8 [kjournald] kjournald-480 [000] 303.084986: 8,0 I W 102736984 + 8 [kjournald] Changelog from v2 -> v3: - use the newly introduced __dynamic_array(). Changelog from v1 -> v2: - use __string() instead of __array() to minimize the memory required to store hex dump of rq->cmd(). - support large pc requests. - add missing blk_fill_rwbs_rq() in block_rq_requeue TRACE_EVENT. - some cleanups. Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com> LKML-Reference: <4A2DF669.5070905@cn.fujitsu.com> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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- 03 6月, 2009 1 次提交
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由 Steven Whitehouse 提交于
Here is an updated patch to include the extra call to trace_seq_init() as requested. This is vs. the latest -tip tree and fixes the use of multiple __print_flags and __print_symbolic in a single tracer. Also tested to ensure its working now: mount.gfs2-2534 [000] 235.850587: gfs2_glock_queue: 8.7 glock 1:2 dequeue PR mount.gfs2-2534 [000] 235.850591: gfs2_demote_rq: 8.7 glock 1:0 demote EX to NL flags:DI mount.gfs2-2534 [000] 235.850591: gfs2_glock_queue: 8.7 glock 1:0 dequeue EX glock_workqueue-2529 [000] 235.850666: gfs2_glock_state_change: 8.7 glock 1:0 state EX => NL tgt:NL dmt:NL flags:lDpI glock_workqueue-2529 [000] 235.850672: gfs2_glock_put: 8.7 glock 1:0 state NL => IV flags:I Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com> LKML-Reference: <1244037123.29604.603.camel@localhost.localdomain> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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- 02 6月, 2009 5 次提交
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由 Steven Rostedt 提交于
After converting the softirq tracer to use te flags options, this caused a regression with the name. Since the flag was used directly it was printed out (i.e. HRTIMER_SOFTIRQ). This patch only shows the softirq name without the SOFTIRQ part. [ Impact: fix regression of output from softirq events ] Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 Li Zefan 提交于
__string() is limited: - it's a char array, but we may want to define array with other types - a source string should be available, but we may just know the string size We introduce __dynamic_array() to break those limitations, and __string() becomes a wrapper of it. As a side effect, now __get_str() can be used in TP_fast_assign but not only TP_print. Take XFS for example, we have the string length in the dirent, but the string itself is not NULL-terminated, so __dynamic_array() can be used: TRACE_EVENT(xfs_dir2, TP_PROTO(struct xfs_da_args *args), TP_ARGS(args), TP_STRUCT__entry( __field(int, namelen) __dynamic_array(char, name, args->namelen + 1) ... ), TP_fast_assign( char *name = __get_str(name); if (args->namelen) memcpy(name, args->name, args->namelen); name[args->namelen] = '\0'; __entry->namelen = args->namelen; ), TP_printk("name %.*s namelen %d", __entry->namelen ? __get_str(name) : NULL __entry->namelen) ); [ Impact: allow defining dynamic size arrays ] Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com> LKML-Reference: <4A2384D2.3080403@cn.fujitsu.com> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 Li Zefan 提交于
Currently TP_fast_assign has a limitation that we can't define local variables in it. Here's one use case when we introduce __dynamic_array(): TP_fast_assign( type *p = __get_dynamic_array(item); foo(p); bar(p); ), [ Impact: allow defining local variables in TP_fast_assign ] Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com> LKML-Reference: <4A2384B1.90100@cn.fujitsu.com> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 Li Zefan 提交于
"tsize" should be "\tsize". Also remove the space before "__str_loc". Before: # cat tracing/events/irq/irq_handler_entry/format ... field:int irq; offset:12; size:4; field: __str_loc name; offset:16;tsize:2; ... After: # cat tracing/events/irq/irq_handler_entry/format ... field:int irq; offset:12; size:4; field:__str_loc name; offset:16; size:2; ... [ Impact: standardize __string field description in events format file ] Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com> Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 Zhaolei 提交于
v3: zhaolei@cn.fujitsu.com: Change TRACE_EVENT definition to new format introduced by Steven Rostedt: consolidate trace and trace_event headers v2: kosaki@jp.fujitsu.com: print the function names instead of addr, and zap the work addr v1: zhaolei@cn.fujitsu.com: Make workqueue tracepoints use TRACE_EVENT macro TRACE_EVENT is a more generic way to define tracepoints. Doing so adds these new capabilities to the tracepoints: - zero-copy and per-cpu splice() tracing - binary tracing without printf overhead - structured logging records exposed under /debug/tracing/events - trace events embedded in function tracer output and other plugins - user-defined, per tracepoint filter expressions Then, this patch converts DEFINE_TRACE to TRACE_EVENT in workqueue related tracepoints. [ Impact: expand workqueue tracer to events tracing ] Signed-off-by: NZhao Lei <zhaolei@cn.fujitsu.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Tom Zanussi <tzanussi@gmail.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: NKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
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- 28 5月, 2009 1 次提交
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由 Zhaolei 提交于
"call" is an argument of macro, but it is also used as a local variable name of function in macro. We should keep this local variable name distinct from any CPP macro parameter name if both are in the same macro scope, although it hasn't caused any problem yet. [ Impact: robustify macro ] Signed-off-by: NZhao Lei <zhaolei@cn.fujitsu.com> Acked-by: NSteven Rostedt <rostedt@goodmis.org> Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
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- 27 5月, 2009 5 次提交
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由 Steven Rostedt 提交于
The recording of the names at trace time is inefficient. This patch implements the softirq event recording to only record the vector and then use the __print_symbolic interface to print out the names. [ Impact: faster recording of softirq events ] Signed-off-by: NSteven Rostedt <rostedt@goodmis.org> Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
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由 Steven Rostedt 提交于
This patch adds __print_symbolic which is similar to __print_flags but works for an enumeration type instead. That is, there is only a one to one mapping between the values and the symbols. When a match is made, then it is printed, otherwise the hex value is outputed. [ Impact: add interface for showing symbol names in events ] Signed-off-by: NSteven Rostedt <rostedt@goodmis.org> Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
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由 Steven Rostedt 提交于
This patch changes the output for gfp_flags from being a simple hex value to the actual names. gfp_flags=GFP_ATOMIC instead of gfp_flags=00000020 And even gfp_flags=GFP_KERNEL instead of gfp_flags=000000d0 (Thanks to Frederic Weisbecker for pointing out that the first version had a bad order of GFP masks) [ Impact: more human readable output from tracer ] Acked-by: NEduard - Gabriel Munteanu <eduard.munteanu@linux360.ro> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org> Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
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由 Steven Rostedt 提交于
It is useful to see the state of a task that is being switched out. This patch adds the output of the state of the previous task in the context switch event. [ Impact: see state of switched out task in context switch ] Signed-off-by: NSteven Rostedt <rostedt@goodmis.org> Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
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由 Steven Rostedt 提交于
Developers have been asking for the ability in the ftrace event tracer to display names of bits in a flags variable. Instead of printing out c2, it would be easier to read FOO|BAR|GOO, assuming that FOO is bit 1, BAR is bit 6 and GOO is bit 7. Some examples where this would be useful are the state flags in a context switch, kmalloc flags, and even permision flags in accessing files. [ v2 changes include: Frederic Weisbecker's idea of using a mask instead of bits, thus we can output GFP_KERNEL instead of GPF_WAIT|GFP_IO|GFP_FS. Li Zefan's idea of allowing the caller of __print_flags to add their own delimiter (or no delimiter) where we can get for file permissions rwx instead of r|w|x. ] [ v3 changes: Christoph Hellwig's idea of using an array instead of va_args. ] [ Impact: better displaying of flags in trace output ] Signed-off-by: NSteven Rostedt <rostedt@goodmis.org> Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
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- 26 5月, 2009 1 次提交
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由 Li Zefan 提交于
When defining a dynamic size string, we add __str_loc_##item to the trace entry, and it stores the location of the actual string in entry->_str_data[] 'unsigned short' should be sufficient to store this information, thus we save 2 bytes per dyn-size string in the ring buffer. [ Impact: reduce memory occupied by dyn-size strings in ring buffer ] Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <4A14EDB6.2050507@cn.fujitsu.com> Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
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- 22 5月, 2009 1 次提交
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由 Neil Horman 提交于
Patch to add the ability to detect drops in hardware interfaces via dropwatch. Adds a tracepoint to net_rx_action to signal everytime a napi instance is polled. The dropmon code then periodically checks to see if the rx_frames counter has changed, and if so, adds a drop notification to the netlink protocol, using the reserved all-0's vector to indicate the drop location was in hardware, rather than somewhere in the code. Signed-off-by: NNeil Horman <nhorman@tuxdriver.com> include/linux/net_dropmon.h | 8 ++ include/trace/napi.h | 11 +++ net/core/dev.c | 5 + net/core/drop_monitor.c | 124 ++++++++++++++++++++++++++++++++++++++++++-- net/core/net-traces.c | 4 + net/core/netpoll.c | 2 6 files changed, 149 insertions(+), 5 deletions(-) Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 11 5月, 2009 1 次提交
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由 Li Zefan 提交于
The last argument of block_remap prober is the original sector before remap, so it should be 'from', not 'to'. [ Impact: clean up ] Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com> Cc: "Alan D. Brunelle" <Alan.Brunelle@hp.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> LKML-Reference: <4A07CE86.5090301@cn.fujitsu.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 06 5月, 2009 3 次提交
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由 Alan D. Brunelle 提交于
Remove redundant from-sector parameter: it's /always/ the bio's sector passed in. [ Impact: cleanup ] Signed-off-by: NAlan D. Brunelle <alan.brunelle@hp.com> Reviewed-by: NLi Zefan <lizf@cn.fujitsu.com> Reviewed-by: NKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <49FF517C.7000503@hp.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Alan D. Brunelle 提交于
This attempts to clarify names utilized during block I/O remap operations (partition, volume manager). It correctly matches up the /from/ information for both device & sector. This takes in the concept from Kosaki Motohiro and extends it to include better naming for the "device_from" field. [ Impact: cleanup ] Signed-off-by: NAlan D. Brunelle <alan.brunelle@hp.com> Reviewed-by: NLi Zefan <lizf@cn.fujitsu.com> Reviewed-by: NKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <49FF4FAE.3000301@hp.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Mathieu Desnoyers 提交于
The orig_cpu parameter in trace_sched_migrate_task() is not necessary, it can be got by using task_cpu(p) in the probe. [ Impact: micro-optimization ] Signed-off-by: NMathieu Desnoyers <mathieu.desnoyers@polymtl.ca> [ modified from Mathieu's patch. The original patch is at: http://marc.info/?l=linux-kernel&m=123791201716239&w=2 ] Signed-off-by: NXiao Guangrong <xiaoguangrong@cn.fujitsu.com> Cc: fweisbec@gmail.com Cc: rostedt@goodmis.org Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: zhaolei@cn.fujitsu.com Cc: laijs@cn.fujitsu.com LKML-Reference: <49FFFDB7.1050402@cn.fujitsu.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 01 5月, 2009 1 次提交
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由 Jason Baron 提交于
Document irqs for the newly created docbook. [ Impact: add documentation ] Signed-off-by: NJason Baron <jbaron@redhat.com> Acked-by: NRandy Dunlap <randy.dunlap@oracle.com> Cc: akpm@linux-foundation.org Cc: rostedt@goodmis.org Cc: fweisbec@gmail.com Cc: mathieu.desnoyers@polymtl.ca Cc: wcohen@redhat.com LKML-Reference: <73ff42be3420157667ec548e9b0e409c3cfad05f.1241107197.git.jbaron@redhat.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 29 4月, 2009 1 次提交
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由 Tom Zanussi 提交于
The new filter comparison ops need to be able to distinguish between signed and unsigned field types, so add an is_signed flag/param to the event field struct/trace_define_fields(). Also define a simple macro, is_signed_type() to determine the signedness at compile time, used in the trace macros. If the is_signed_type() macro won't work with a specific type, a new slightly modified version of TRACE_FIELD() called TRACE_FIELD_SIGN(), allows the signedness to be set explicitly. [ Impact: extend trace-filter code for new feature ] Signed-off-by: NTom Zanussi <tzanussi@gmail.com> Acked-by: NSteven Rostedt <rostedt@goodmis.org> Cc: fweisbec@gmail.com Cc: Li Zefan <lizf@cn.fujitsu.com> LKML-Reference: <1240905893.6416.120.camel@tropicana> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 17 6月, 2009 2 次提交
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由 Theodore Ts'o 提交于
Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>
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由 Theodore Ts'o 提交于
Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>
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- 24 4月, 2009 4 次提交
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由 Steven Rostedt 提交于
The TRACE_FORMAT macro has been deprecated by the TRACE_EVENT macro. There are no more users. All new users must use the TRACE_EVENT macro. [ Impact: remove old functionality ] Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 Steven Rostedt 提交于
The TRACE_FORMAT will soon be deprecated. This patch converts it to the TRACE_EVENT macro. Note, this change should also speed up the tracing. [ Impact: remove a user of deprecated TRACE_FORMAT ] Cc: Jason Baron <jbaron@redhat.com> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 Steven Rostedt 提交于
The TRACE_FORMAT will soon be deprecated. This patch converts it to the TRACE_EVENT macro. Note, this change should also speed up the tracing. [ Impact: remove a user of deprecated TRACE_FORMAT ] Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 Steven Rostedt 提交于
In case a module uses the TRACE_EVENT macro for creating automated events in ftrace, it may choose to use a different file name than the defined system name, or choose to use a different path than the default "include/trace/events" include path. If this is done, then before including trace/define_trace.h the header would define either "TRACE_INCLUDE_FILE" for the file name or "TRACE_INCLUDE_PATH" for the include path. If it does not define these, then the define_trace.h defines them instead. If define trace defines them, then define_trace.h should also undefine them before exiting. To do this a macro is used to note this: #ifndef TRACE_INCLUDE_FILE # define TRACE_INCLUDE_FILE TRACE_SYSTEM # define UNDEF_TRACE_INCLUDE_FILE #endif [...] #ifdef UNDEF_TRACE_INCLUDE_FILE # undef TRACE_INCLUDE_FILE # undef UNDEF_TRACE_INCLUDE_FILE #endif The UNDEF_TRACE_INCLUDE_FILE acts as a CPP variable to know to undef the TRACE_INCLUDE_FILE before leaving define_trace.h. Unfortunately, due to cut and paste errors, the macros between FILE and PATH got mixed up. [ Impact: undef TRACE_INCLUDE_FILE and/or TRACE_INCLUDE_PATH when needed ] Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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- 22 4月, 2009 4 次提交
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由 Frederic Weisbecker 提交于
The __get_str() macro is used in a code part then its content should be protected with parenthesis. [ Impact: make macro definition more robust ] Reported-by: NSteven Rostedt <rostedt@goodmis.org> Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
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由 Frederic Weisbecker 提交于
Now that we can support the dynamic sized string, make the lock tracing able to use it, making it safe against modules removal and consuming the right amount of memory needed for each lock name Changes in v2: adapt to the __ending_string() updates and the opening_string() removal. [ Impact: protect lock tracer against module removal ] Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Steven Rostedt <rostedt@goodmis.org>
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由 Frederic Weisbecker 提交于
This patch provides the support for dynamic size strings on event tracing. The key concept is to use a structure with an ending char array field of undefined size and use such ability to allocate the minimal size on the ring buffer to make one or more string entries fit inside, as opposite to a fixed length strings with upper bound. The strings themselves are represented using fields which have an offset value from the beginning of the entry. This patch provides three new macros: __string(item, src) This one declares a string to the structure inside TP_STRUCT__entry. You need to provide the name of the string field and the source that will be copied inside. This will also add the dynamic size of the string needed for the ring buffer entry allocation. A stack allocated structure is used to temporarily store the offset of each strings, avoiding double calls to strlen() on each event insertion. __get_str(field) This one will give you a pointer to the string you have created. This is an abstract helper to resolve the absolute address given the field name which is a relative address from the beginning of the trace_structure. __assign_str(dst, src) Use this macro to automatically perform the string copy from src to dst. src must be a variable to assign and dst is the name of a __string field. Example on how to use it: TRACE_EVENT(my_event, TP_PROTO(char *src1, char *src2), TP_ARGS(src1, src2), TP_STRUCT__entry( __string(str1, src1) __string(str2, src2) ), TP_fast_assign( __assign_str(str1, src1); __assign_str(str2, src2); ), TP_printk("%s %s", __get_str(src1), __get_str(src2)) ) Of course you can mix-up any __field or __array inside this TRACE_EVENT. The position of the __string or __assign_str doesn't matter. Changes in v2: Address the suggestion of Steven Rostedt: drop the opening_string() macro and redefine __ending_string() to get the size of the string to be copied instead of overwritting the whole ring buffer allocation. Changes in v3: Address other suggestions of Steven Rostedt and Peter Zijlstra with some changes: drop the __ending_string and the need to have only one string field. Use offsets instead of absolute addresses. [ Impact: allow more compact memory usage for string tracing ] Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
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由 Li Zefan 提交于
struct trace_entry->type is unsigned char, while trace event's id is int type, thus for a event with id >= 256, it's entry->type is cast to (id % 256), and then we can't see the trace output of this event. # insmod trace-events-sample.ko # echo foo_bar > /mnt/tracing/set_event # cat /debug/tracing/events/trace-events-sample/foo_bar/id 256 # cat /mnt/tracing/trace_pipe <...>-3548 [001] 215.091142: Unknown type 0 <...>-3548 [001] 216.089207: Unknown type 0 <...>-3548 [001] 217.087271: Unknown type 0 <...>-3548 [001] 218.085332: Unknown type 0 [ Impact: fix output for trace events with id >= 256 ] Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com> Acked-by: NFrederic Weisbecker <fweisbec@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <49EEDB0E.5070207@cn.fujitsu.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 18 4月, 2009 2 次提交
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由 Steven Rostedt 提交于
The CONFIG_EVENT_TRACER is the way to turn on event tracing when no other tracing has been configured. All code to get enabled should depend on CONFIG_EVENT_TRACING. That is what is enabled when TRACING (or CONFIG_EVENT_TRACER) is selected. This patch enables the include/trace/ftrace.h file when CONFIG_EVENT_TRACING is enabled. [ Impact: fix warning in event tracer selftest ] Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 Zhaolei 提交于
kmem_event_types.h is no longer necessary since tracepoint definitions are put into include/trace/events/kmem.h [ Impact: remove now-unused file. ] Signed-off-by: NZhao Lei <zhaolei@cn.fujitsu.com> Acked-by: NSteven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <49E7EF37.20802057@cn.fujitsu.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 17 4月, 2009 1 次提交
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由 Jeremy Fitzhardinge 提交于
Tracepoints with no arguments can issue two warnings: "field" defined by not used "ret" is uninitialized in this function Mark field as being OK to leave unused, and initialize ret. [ Impact: fix false positive compiler warnings. ] Signed-off-by: NJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Acked-by: NSteven Rostedt <rostedt@goodmis.org> Cc: mathieu.desnoyers@polymtl.ca LKML-Reference: <1239950139-1119-5-git-send-email-jeremy@goop.org> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 15 4月, 2009 4 次提交
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由 Steven Rostedt 提交于
Impact: clean up Create a sub directory in include/trace called events to keep the trace point headers in their own separate directory. Only headers that declare trace points should be defined in this directory. Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Neil Horman <nhorman@tuxdriver.com> Cc: Zhao Lei <zhaolei@cn.fujitsu.com> Cc: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 Steven Rostedt 提交于
Impact: fix compile error of lockdep event tracer Ingo Molnar pointed out that the system name for the lockdep tracer was "lock" which is used to include the event trace file name. It should be "lockdep" Reported-by: NIngo Molnar <mingo@elte.hu> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 Steven Rostedt 提交于
Impact: allow modules to add TRACE_EVENTS on load This patch adds the final hooks to allow modules to use the TRACE_EVENT macro. A notifier and a data structure are used to link the TRACE_EVENTs defined in the module to connect them with the ftrace event tracing system. It also adds the necessary automated clean ups to the trace events when a module is removed. Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 Steven Rostedt 提交于
This patch moves the ftrace creation into include/trace/ftrace.h and simplifies the work of developers in adding new tracepoints. Just the act of creating the trace points in include/trace and including define_trace.h will create the events in the debugfs/tracing/events directory. This patch removes the need of include/trace/trace_events.h Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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