* [Bug translator/13100] New: Building tracepoint cache all at once fails when kernel debuginfo installed
@ 2011-08-16 20:50 mjw at redhat dot com
2011-10-05 19:25 ` [Bug translator/13100] " jistone at redhat dot com
2011-10-05 20:46 ` fche at redhat dot com
0 siblings, 2 replies; 3+ messages in thread
From: mjw at redhat dot com @ 2011-08-16 20:50 UTC (permalink / raw)
To: systemtap
http://sourceware.org/bugzilla/show_bug.cgi?id=13100
Bug #: 13100
Summary: Building tracepoint cache all at once fails when
kernel debuginfo installed
Product: systemtap
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: translator
AssignedTo: systemtap@sourceware.org
ReportedBy: mjw@redhat.com
Classification: Unclassified
Commit d4393459 introduced deeper searching for "hidden" tracepoints.
This uses the include files from the kernel debuginfo package.
But this seems to make the first pass of trying to create a tracepoint cache in
one go always fail because now headers are included two times (ones under
/lib/module/.../build/include and once under
/usr/src/debug////////kernel.../include/
Example:
$rm -rf ~/.systemtap
$ stap -e 'probe kernel.trace("sched_wakeup") { log("wake!"); exit(); }'
Warning: make exited with status: 2
[... wait some long time ...]
wake!
Things still work because after that first attempt it tries building each
tracepoint header file individually. So it is really just a transient warning,
causing fallback to a slow caching method.
More verbose logs:
Located kernel source tree (DW_AT_comp_dir) at
'/usr/src/debug////////kernel-2.6.35.fc14/linux-2.6.35.x86_64'
Checking tracepoint glob
/lib/modules/2.6.35.13-92.fc14.x86_64/build/include/trace/events/*.h
Checking tracepoint glob
/lib/modules/2.6.35.13-92.fc14.x86_64/build/include/trace/*.h
Checking tracepoint glob
/lib/modules/2.6.35.13-92.fc14.x86_64/build/arch/x86/kvm/*trace.h
Checking tracepoint glob
/lib/modules/2.6.35.13-92.fc14.x86_64/build/fs/xfs/linux-*/xfs_tr*.h
Checking tracepoint glob
/usr/src/debug////////kernel-2.6.35.fc14/linux-2.6.35.x86_64/include/trace/events/*.h
Checking tracepoint glob
/usr/src/debug////////kernel-2.6.35.fc14/linux-2.6.35.x86_64/include/trace/*.h
Checking tracepoint glob
/usr/src/debug////////kernel-2.6.35.fc14/linux-2.6.35.x86_64/arch/x86/kvm/*trace.h
Checking tracepoint glob
/usr/src/debug////////kernel-2.6.35.fc14/linux-2.6.35.x86_64/fs/xfs/linux-*/xfs_tr*.h
Pass 2: getting a tracepoint query for 45 headers:
/lib/modules/2.6.35.13-92.fc14.x86_64/build/include/trace/events/bkl.h
/lib/modules/2.6.35.13-92.fc14.x86_64/build/include/trace/events/block.h
/lib/modules/2.6.35.13-92.fc14.x86_64/build/include/trace/events/ext4.h
/lib/modules/2.6.35.13-92.fc14.x86_64/build/include/trace/events/irq.h
/lib/modules/2.6.35.13-92.fc14.x86_64/build/include/trace/events/jbd2.h
/lib/modules/2.6.35.13-92.fc14.x86_64/build/include/trace/events/kmem.h
/lib/modules/2.6.35.13-92.fc14.x86_64/build/include/trace/events/kvm.h
/lib/modules/2.6.35.13-92.fc14.x86_64/build/include/trace/events/lock.h
/lib/modules/2.6.35.13-92.fc14.x86_64/build/include/trace/events/mce.h
/lib/modules/2.6.35.13-92.fc14.x86_64/build/include/trace/events/module.h
/lib/modules/2.6.35.13-92.fc14.x86_64/build/include/trace/events/napi.h
/lib/modules/2.6.35.13-92.fc14.x86_64/build/include/trace/events/power.h
/lib/modules/2.6.35.13-92.fc14.x86_64/build/include/trace/events/sched.h
/lib/modules/2.6.35.13-92.fc14.x86_64/build/include/trace/events/scsi.h
/lib/modules/2.6.35.13-92.fc14.x86_64/build/include/trace/events/signal.h
/lib/modules/2.6.35.13-92.fc14.x86_64/build/include/trace/events/skb.h
/lib/modules/2.6.35.13-92.fc14.x86_64/build/include/trace/events/syscalls.h
/lib/modules/2.6.35.13-92.fc14.x86_64/build/include/trace/events/timer.h
/lib/modules/2.6.35.13-92.fc14.x86_64/build/include/trace/events/workqueue.h
/lib/modules/2.6.35.13-92.fc14.x86_64/build/include/trace/boot.h
/lib/modules/2.6.35.13-92.fc14.x86_64/build/include/trace/syscall.h
/usr/src/debug////////kernel-2.6.35.fc14/linux-2.6.35.x86_64/include/trace/events/bkl.h
/usr/src/debug////////kernel-2.6.35.fc14/linux-2.6.35.x86_64/include/trace/events/block.h
/usr/src/debug////////kernel-2.6.35.fc14/linux-2.6.35.x86_64/include/trace/events/ext4.h
/usr/src/debug////////kernel-2.6.35.fc14/linux-2.6.35.x86_64/include/trace/events/irq.h
/usr/src/debug////////kernel-2.6.35.fc14/linux-2.6.35.x86_64/include/trace/events/jbd2.h
/usr/src/debug////////kernel-2.6.35.fc14/linux-2.6.35.x86_64/include/trace/events/kmem.h
/usr/src/debug////////kernel-2.6.35.fc14/linux-2.6.35.x86_64/include/trace/events/kvm.h
/usr/src/debug////////kernel-2.6.35.fc14/linux-2.6.35.x86_64/include/trace/events/lock.h
/usr/src/debug////////kernel-2.6.35.fc14/linux-2.6.35.x86_64/include/trace/events/mce.h
/usr/src/debug////////kernel-2.6.35.fc14/linux-2.6.35.x86_64/include/trace/events/module.h
/usr/src/debug////////kernel-2.6.35.fc14/linux-2.6.35.x86_64/include/trace/events/napi.h
/usr/src/debug////////kernel-2.6.35.fc14/linux-2.6.35.x86_64/include/trace/events/power.h
/usr/src/debug////////kernel-2.6.35.fc14/linux-2.6.35.x86_64/include/trace/events/sched.h
/usr/src/debug////////kernel-2.6.35.fc14/linux-2.6.35.x86_64/include/trace/events/scsi.h
/usr/src/debug////////kernel-2.6.35.fc14/linux-2.6.35.x86_64/include/trace/events/signal.h
/usr/src/debug////////kernel-2.6.35.fc14/linux-2.6.35.x86_64/include/trace/events/skb.h
/usr/src/debug////////kernel-2.6.35.fc14/linux-2.6.35.x86_64/include/trace/events/syscalls.h
/usr/src/debug////////kernel-2.6.35.fc14/linux-2.6.35.x86_64/include/trace/events/timer.h
/usr/src/debug////////kernel-2.6.35.fc14/linux-2.6.35.x86_64/include/trace/events/workqueue.h
/usr/src/debug////////kernel-2.6.35.fc14/linux-2.6.35.x86_64/include/trace/boot.h
/usr/src/debug////////kernel-2.6.35.fc14/linux-2.6.35.x86_64/include/trace/syscall.h
/usr/src/debug////////kernel-2.6.35.fc14/linux-2.6.35.x86_64/arch/x86/kvm/mmutrace.h
/usr/src/debug////////kernel-2.6.35.fc14/linux-2.6.35.x86_64/arch/x86/kvm/trace.h
/usr/src/debug////////kernel-2.6.35.fc14/linux-2.6.35.x86_64/fs/xfs/linux-2.6/xfs_trace.h
Running make -C /lib/modules/2.6.35.13-92.fc14.x86_64/build
M=/tmp/staplYckyE/tracequery_kmod_1 modules ARCH=x86_64 V=1
make: Entering directory `/usr/src/kernels/2.6.35.13-92.fc14.x86_64'
test -e include/generated/autoconf.h -a -e include/config/auto.conf || ( \
echo; \
echo " ERROR: Kernel configuration is invalid."; \
echo " include/generated/autoconf.h or include/config/auto.conf are
missing.";\
echo " Run 'make oldconfig && make prepare' on kernel src to fix it.";
\
echo; \
/bin/false)
mkdir -p /tmp/staplYckyE/tracequery_kmod_1/.tmp_versions ; rm -f
/tmp/staplYckyE/tracequery_kmod_1/.tmp_versions/*
make -f scripts/Makefile.build obj=/tmp/staplYckyE/tracequery_kmod_1
gcc -Wp,-MD,/tmp/staplYckyE/tracequery_kmod_1/.tracequery_kmod_1.o.d
-nostdinc -isystem /usr/lib/gcc/x86_64-redhat-linux/4.5.1/include
-I/usr/src/kernels/2.6.35.13-92.fc14.x86_64/arch/x86/include -Iinclude
-include include/generated/autoconf.h -D__KERNEL__ -Wall -Wundef
-Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common
-Werror-implicit-function-declaration -Wno-format-security
-fno-delete-null-pointer-checks -Os -m64 -mtune=generic -mno-red-zone
-mcmodel=kernel -funit-at-a-time -maccumulate-outgoing-args -fstack-protector
-DCONFIG_AS_CFI=1 -DCONFIG_AS_CFI_SIGNAL_FRAME=1 -DCONFIG_AS_CFI_SECTIONS=1
-pipe -Wno-sign-compare -fno-asynchronous-unwind-tables -mno-sse -mno-mmx
-mno-sse2 -mno-3dnow -Wframe-larger-than=2048 -fno-omit-frame-pointer
-fno-optimize-sibling-calls -g -pg -Wdeclaration-after-statement
-Wno-pointer-sign -fno-strict-overflow -fconserve-stack -g
-Wno-implicit-function-declaration -Werror
-I/usr/src/debug////////kernel-2.6.35.fc14/linux-2.6.35.x86_64 -DMODULE
-D"KBUILD_STR(s)=#s" -D"KBUILD_BASENAME=KBUILD_STR(tracequery_kmod_1)"
-D"KBUILD_MODNAME=KBUILD_STR(tracequery_kmod_1)" -D"DEBUG_HASH=10"
-D"DEBUG_HASH2=51" -c -o /tmp/staplYckyE/tracequery_kmod_1/tracequery_kmod_1.o
/tmp/staplYckyE/tracequery_kmod_1/tracequery_kmod_1.c
In file included from
/tmp/staplYckyE/tracequery_kmod_1/tracequery_kmod_1.c:146:0:
include/trace/events/napi.h:12:1: error: redefinition of ‘stapprobe_napi_poll’
include/trace/events/napi.h:12:1: note: previous definition of
‘stapprobe_napi_poll’ was here
make[1]: *** [/tmp/staplYckyE/tracequery_kmod_1/tracequery_kmod_1.o] Error 1
make: *** [_module_/tmp/staplYckyE/tracequery_kmod_1] Error 2
make: Leaving directory `/usr/src/kernels/2.6.35.13-92.fc14.x86_64'
Spawn waitpid result (0x200): 2
Warning: make exited with status: 2
Copying /dev/null to
/home/mark/.systemtap/cache/98/tracequery_9820af1e799794b0d47d40c88a1f5129_4917.ko
Pass 2: getting a tracepoint query for 1 headers:
[...]
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* [Bug translator/13100] Building tracepoint cache all at once fails when kernel debuginfo installed
2011-08-16 20:50 [Bug translator/13100] New: Building tracepoint cache all at once fails when kernel debuginfo installed mjw at redhat dot com
@ 2011-10-05 19:25 ` jistone at redhat dot com
2011-10-05 20:46 ` fche at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: jistone at redhat dot com @ 2011-10-05 19:25 UTC (permalink / raw)
To: systemtap
http://sourceware.org/bugzilla/show_bug.cgi?id=13100
Josh Stone <jistone at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jistone at redhat dot com
--- Comment #1 from Josh Stone <jistone at redhat dot com> 2011-10-05 19:24:45 UTC ---
The batch tracequery, with all discovered headers at once, was something of an
optimization, and experience has shown it to be too optimistic. This idea was
so we could have only one kbuild make invocation (which is fairly expensive)
and only one resulting tracequery.ko to juggle. But the tracepoint headers so
often conflict with each other that we almost always end up falling back to
separate tracequery.ko per header.
So if we accept that as a fact of life, then perhaps we should just restructure
it to always do separate tracequery.ko, but we could combine them into a single
Makefile for then only one kbuild invocation. That should hopefully relieve
much of the overhead of building them separately, even though they'll still be
forking lots of compiler instances.
If we can find a way to soft-fail any unusable headers, then these objects
could still be combined into one big tracequery.ko. That would make cache
management easier, but I'm not sure if kbuild can express this easily.
--
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* [Bug translator/13100] Building tracepoint cache all at once fails when kernel debuginfo installed
2011-08-16 20:50 [Bug translator/13100] New: Building tracepoint cache all at once fails when kernel debuginfo installed mjw at redhat dot com
2011-10-05 19:25 ` [Bug translator/13100] " jistone at redhat dot com
@ 2011-10-05 20:46 ` fche at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: fche at redhat dot com @ 2011-10-05 20:46 UTC (permalink / raw)
To: systemtap
http://sourceware.org/bugzilla/show_bug.cgi?id=13100
Frank Ch. Eigler <fche at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |fche at redhat dot com
AssignedTo|systemtap at sourceware dot |fche at redhat dot com
|org |
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2011-08-16 20:50 [Bug translator/13100] New: Building tracepoint cache all at once fails when kernel debuginfo installed mjw at redhat dot com
2011-10-05 19:25 ` [Bug translator/13100] " jistone at redhat dot com
2011-10-05 20:46 ` fche at redhat dot com
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