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2010-05-21perf-record: Remove -MPeter Zijlstra1-24/+12
Since it is not allowed to create cross-cpu (or cross-task) buffers, this option is no longer valid. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <20100521090710.582740993@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-05-21perf: Ensure that IOC_OUTPUT isn't used to create multi-writer buffersPeter Zijlstra1-0/+19
Since we want to ensure buffers only have a single writer, we must avoid creating one with multiple. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <20100521090710.528215873@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-05-21perf, trace: Optimize tracepoints by using per-tracepoint-per-cpu hlist to track eventsPeter Zijlstra7-124/+143
Avoid the swevent hash-table by using per-tracepoint hlists. Also, avoid conditionals on the fast path by ordering with probe unregister so that we should never get on the callback path without the data being there. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <20100521090710.473188012@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-05-21perf, trace: Optimize tracepoints by removing IRQ-disable from perf/tracepoint interactionPeter Zijlstra5-72/+47
Improves performance. Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <1274259525.5605.10352.camel@twins> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-05-20perf tui: Allow disabling the TUI on a per command basis in ~/.perfconfigArnaldo Carvalho de Melo4-10/+34
Using the same scheme as for git's/perf's pager setup, i.e. if one doesn't want to, on a newt enabled perf binary, to disable the TUI for 'perf report', its just a matter of doing: [root@doppio linux-2.6-tip]# printf "[tui]\n\nreport = off\n" > /root/.perfconfig [root@doppio linux-2.6-tip]# cat /root/.perfconfig [tui] report = off [root@doppio linux-2.6-tip]# System wide settings are also possible, by editing /etc/perfconfig, etc, i.e. the git machinery for config files applies to perf as well, so when in doubt where to put your settings, consult the git documentation, if it fails, please let us know. Suggested-by: Ingo Molnar <mingo@elte.hu> Discussed-with: Stephane Eranian <eranian@google.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-05-20perf record: remove unneeded gettimeofday() callRuss Anderson1-16/+1
Perf record repeatedly calls gettimeofday() which adds noise to the performance measurements. Since gettimeofday() is only used for the error printf, delete it. Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <20100518225240.GC25589@sgi.com> Signed-off-by: Russ Anderson <rja@sgi.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-05-20perf: Fix forgotten preempt_enable by nested writersFrederic Weisbecker1-1/+2
A writer that gets a reference to the buffer handle disables preemption. When we put that reference, we check if we are the outer most writer and if not, we simply return and defer the head update to the outer most writer. The problem here is that preemption is only reenabled by the outer most, that produces preemption count imbalance for every nested writer that exit. So just don't forget to always re-enable preemption when we put the buffer reference, whoever we are. Fixes lots of sleeping in atomic warnings, visible with lock events recording. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Stephane Eranian <eranian@google.com> Cc: Robert Richter <robert.richter@amd.com>
2010-05-20perf annotate: Use build-ids to find the right DSOArnaldo Carvalho de Melo6-18/+54
We were still using the pathname found on the MMAP event, that could not be the one we used when recording, so use the build-id cache for that, only falling back to use the pathname in the MMAP event if no build-ids are available. With this we now also are able to do secure, seamless offline annotation. Example: [root@doppio linux-2.6-tip]# perf report -g none -v 2> /dev/null | head -10 8.12% Xorg /usr/lib64/libpixman-1.so.0.14.0 0x0000000000026d02 B [.] pixman_rasterize_edges 4.68% firefox /usr/lib64/xulrunner-1.9.1/libxul.so 0x00000000005dbdba B [.] 0x000000005dbdba 3.70% swapper /lib/modules/2.6.34-rc6/build/vmlinux 0xffffffff81022cea ! [k] read_hpet 2.96% init /lib/modules/2.6.34-rc6/build/vmlinux 0xffffffff81022cea ! [k] read_hpet 2.73% swapper /lib/modules/2.6.34-rc6/build/vmlinux 0xffffffff8100a738 ! [k] mwait_idle_with_hints [root@doppio linux-2.6-tip]# perf annotate -v pixman_rasterize_edges 2>&1 | grep Executing Executing: objdump --start-address=0x000000371ce26670 --stop-address=0x000000371ce2709f -dS /root/.debug/.build-id/bd/6ac5199137aaeb279f864717d8d061477466c1|grep -v /root/.debug/.build-id/bd/6ac5199137aaeb279f864717d8d061477466c1|expand [root@doppio linux-2.6-tip]# perf buildid-list | grep libpixman-1.so.0.14.0 bd6ac5199137aaeb279f864717d8d061477466c1 /usr/lib64/libpixman-1.so.0.14.0 [root@doppio linux-2.6-tip]# Reported-by: Stephane Eranian <eranian@google.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-05-20perf TUI: Make 'space' be an alias to 'PgDn'Arnaldo Carvalho de Melo1-0/+2
Just like if one is using the stdio based pager, or more/less, for that matter. Suggested-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-05-20perf: Fix unaligned accesses while fetching trace valuesFrederic Weisbecker1-1/+6
Accessing trace values of an 8 size may end up in a segfault on archs that can't deal with misaligned access, which is the case for sparc 64. This is because PERF_SAMPLE_RAW are aligned to 4 and not to 8. Fix this on the macros that get the values of 8 size. This fixes segfaults on perf tools in sparc 64. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Tom Zanussi <tzanussi@gmail.com> Cc: Masami Hiramatsu <mhiramat@redhat.com> Cc: David Miller <davem@davemloft.net>
2010-05-20perf: Comply with new rcu checks APIFrederic Weisbecker1-12/+46
The software events hlist doesn't fully comply with the new rcu checks api. We need to consider three different sides that access the hlist: - the hlist allocation/release side. This side happens when an events is created or released, accesses to the hlist are serialized under the cpuctx mutex. - the events insertion/removal in the hlist. This side is always serialized against the above one. The hlist is always present during such operations. This side happens when a software event is scheduled in/out. The serialization that ensures the software event is really attached to the context is made under the ctx->lock. - events triggering. This is the read side, it can happen concurrently with any update side. This patch deals with them one by one and anticipates with the separate rcu mem space patches in preparation. This patch fixes various annoying rcu warnings. Reported-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org>
2010-05-20perf: Use read() instead of lseek() in trace_event_read.c:skip()Tom Zanussi1-6/+13
This is a small fix for a problem affecting live-mode, introduced recently: root@tropicana:~# perf trace rwtop perf trace started with Perl script /root/libexec/perf-core/scripts/perl/rwtop.pl Fatal: did not read header event commit d00a47cce569a3e660a8c9de5d57af28d6a9f0f7 added a skip() function to skip over e.g. header_page, but this doesn't work for live mode. This patch re-implements skip() to use read() instead of lseek() to fix that. Signed-off-by: Tom Zanussi <tzanussi@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1273032130.6383.28.camel@tropicana> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
2010-05-19perf session: Make read_build_id routines look at the host_machine tooArnaldo Carvalho de Melo5-40/+69
The changes made to support host and guest machines in a session, that started when the 'perf kvm' tool was introduced ended up introducing a bug where the host_machine was not having its DSOs traversed for build-id processing. Fix it by moving some methods to the right classes and considering the host_machine when processing build-ids. Reported-by: Tom Zanussi <tzanussi@gmail.com> Reported-by: Stephane Eranian <eranian@google.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-05-19perf symbols: Don't try to read the build-id twiceArnaldo Carvalho de Melo1-0/+4
In __dsos__read_build_ids if the dso already had its build-id read, don't try again. Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-05-19perf, x86: P4 PMU -- add missing bit in CCCR maskCyrill Gorcunov1-1/+2
Should be there for the sake of RAW events. Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> CC: Lin Ming <ming.m.lin@intel.com> CC: Peter Zijlstra <a.p.zijlstra@chello.nl> CC: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <20100518212439.354345151@openvz.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-05-19perf, x86: P4_pmu_schedule_events -- use smp_processor_id instead of raw_Cyrill Gorcunov1-1/+1
This snippet somehow escaped the commit: | commit 137351e0feeb9f25d99488ee1afc1c79f5499a9a | Author: Cyrill Gorcunov <gorcunov@openvz.org> | Date: Sat May 8 15:25:52 2010 +0400 | | x86, perf: P4 PMU -- protect sensible procedures from preemption so bring it eventually back. It helps to catch preemption issue (if there will be, rule of thumb -- don't use raw_ if you can). Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Cc: Lin Ming <ming.m.lin@intel.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <20100518212439.167259349@openvz.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-05-19perf, x86: P4 PMU -- do a real check for ESCR address being in hashCyrill Gorcunov1-3/+4
To prevent from clashes in future code modifications do a real check for ESCR address being in hash. At moment the callers are known to pass sane values but better to be on a safe side. And comment fix. Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> CC: Lin Ming <ming.m.lin@intel.com> CC: Peter Zijlstra <a.p.zijlstra@chello.nl> CC: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <20100518212439.004503600@openvz.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-05-18perf tools: remove xstrndup, xmalloc, xzallocArnaldo Carvalho de Melo4-51/+3
All the functions that call this can handle the equivalent, non panic'ing wrapped routines. Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-05-18perf probe: Don't call die()Arnaldo Carvalho de Melo1-3/+7
Functions that were calling xzalloc also returned -1 when, for other reasons, it could fail, and the calleds are coping with failures, so stop using die() and xzalloc(). Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Masami Hiramatsu <mhiramat@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-05-18perf probe: Fix some error exit pathsArnaldo Carvalho de Melo1-10/+19
That could leave filedescriptors open and leak memory. Also stop using xmalloc, use malloc and handle results just like other error cases in the same routine that used it. Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Masami Hiramatsu <mhiramat@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-05-18perf tools: Remove some unused functionsArnaldo Carvalho de Melo19-1909/+20
Without the bloated cplus_demangle from binutils, i.e building with: $ make NO_DEMANGLE=1 O=~acme/git/build/perf -j3 -C tools/perf/ install Before: text data bss dec hex filename 471851 29280 4025056 4526187 45106b /home/acme/bin/perf After: [acme@doppio linux-2.6-tip]$ size ~/bin/perf text data bss dec hex filename 446886 29232 4008576 4484694 446e56 /home/acme/bin/perf So its a 5.3% size reduction in code, but the interesting part is in the git diff --stat output: 19 files changed, 20 insertions(+), 1909 deletions(-) If we ever need some of the things we got from git but weren't using, we just have to go to the git repo and get fresh, uptodate source code bits. Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-05-18perf stat: add perf stat -B to pretty print large numbersStephane Eranian2-4/+17
It is hard to read very large numbers so provide an option to perf stat to separate thousands using a separator. The patch leverages the locale support of stdio. You need to set your LC_NUMERIC appropriately, for instance LC_NUMERIC=en_US.UTF8. You need to pass -B to activate this feature. This way existing scripts parsing the output do not need to be changed. Here is an example. $ perf stat noploop 2 noploop for 2 seconds Performance counter stats for 'noploop 2': 1998.347031 task-clock-msecs # 0.998 CPUs 61 context-switches # 0.000 M/sec 0 CPU-migrations # 0.000 M/sec 118 page-faults # 0.000 M/sec 4,138,410,900 cycles # 2070.917 M/sec (scaled from 70.01%) 2,062,650,268 instructions # 0.498 IPC (scaled from 70.01%) 2,057,653,466 branches # 1029.678 M/sec (scaled from 70.01%) 40,267 branch-misses # 0.002 % (scaled from 30.04%) 2,055,961,348 cache-references # 1028.831 M/sec (scaled from 30.03%) 53,725 cache-misses # 0.027 M/sec (scaled from 30.02%) 2.001393933 seconds time elapsed $ perf stat -B noploop 2 noploop for 2 seconds Performance counter stats for 'noploop 2': 1998.297883 task-clock-msecs # 0.998 CPUs 59 context-switches # 0.000 M/sec 0 CPU-migrations # 0.000 M/sec 119 page-faults # 0.000 M/sec 4,131,380,160 cycles # 2067.450 M/sec (scaled from 70.01%) 2,059,096,507 instructions # 0.498 IPC (scaled from 70.01%) 2,054,681,303 branches # 1028.216 M/sec (scaled from 70.01%) 25,650 branch-misses # 0.001 % (scaled from 30.05%) 2,056,283,014 cache-references # 1029.017 M/sec (scaled from 30.03%) 47,097 cache-misses # 0.024 M/sec (scaled from 30.02%) 2.001391016 seconds time elapsed Cc: David S. Miller <davem@davemloft.net> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <4bf28fe8.914ed80a.01ca.fffff5f5@mx.google.com> Signed-off-by: Stephane Eranian <eranian@google.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-05-18perf, sparc: Implement group scheduling transactional APIsLin Ming1-47/+61
Convert to the transactional PMU API and remove the duplication of group_sched_in(). [cross build only] Signed-off-by: Lin Ming <ming.m.lin@intel.com> Acked-by: David Miller <davem@davemloft.net> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1272002193.5707.65.camel@minggr.sh.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-05-18perf: Optimize perf_output_*() by avoiding local_xchg()Peter Zijlstra2-1/+3
Since the x86 XCHG ins implies LOCK, avoid the use by using a sequence count instead. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-05-18perf: Optimize the hotpath by converting the perf output buffer to local_tPeter Zijlstra2-23/+22
Since there is now only a single writer, we can use local_t instead and avoid all these pesky LOCK insn. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-05-18perf: Optimize the perf_output() path by removing IRQ-disablesPeter Zijlstra2-69/+30
Since we can now assume there is only a single writer to each buffer, we can remove per-cpu lock thingy and use a simply nest-count to the same effect. This removes the need to disable IRQs. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-05-18perf: Disallow mmap() on per-task inherited eventsPeter Zijlstra1-0/+8
Since we now have working per-task-per-cpu events for a while, disallow mmap() on per-task inherited events. Those things were a performance problem anyway, and doing away with it allows us to optimize the buffer somewhat by assuming there is only a single writer. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-05-18perf: Optimize buffer placement by allocating buffers NUMA awarePeter Zijlstra1-2/+15
Ensure cpu bound buffers live on the right NUMA node. Suggested-by: Stephane Eranian <eranian@google.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <1274114880.5605.5236.camel@twins> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-05-18perf: Fix errors path in perf_output_begin()Stephane Eranian1-1/+1
In case the sampling buffer has no "payload" pages, nr_pages is 0. The problem is that the error path in perf_output_begin() skips to a label which assumes perf_output_lock() has been issued which is not the case. That triggers a WARN_ON() in perf_output_unlock(). This patch fixes the problem by skipping perf_output_unlock() in case data->nr_pages is 0. Signed-off-by: Stephane Eranian <eranian@google.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <4bf13674.014fd80a.6c82.ffffb20c@mx.google.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-05-18perf/ftrace: Optimize perf/tracepoint interaction for single eventsPeter Zijlstra7-18/+31
When we've got but a single event per tracepoint there is no reason to try and multiplex it so don't. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Tested-by: Ingo Molnar <mingo@elte.hu> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-05-18perf, x86: P4 PMU -- fix typo in unflagged NMI handlingCyrill Gorcunov1-1/+1
Tested-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Cc: Cyrill Gorcunov <gorcunov@gmail.com> LKML-Reference: <1274174954.22793.17.camel@minggr.sh.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-05-18perf, x86: P4 PMU -- handle unflagged eventsCyrill Gorcunov1-16/+16
It might happen that an event can overflow without the proper overflow flag set. Check the sign bit in the raw counter value to solve this problem. Tested-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: fweisbec@gmail.com Cc: Cyrill Gorcunov <gorcunov@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <1274083984.6540.15.camel@minggr.sh.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-05-18perf tui: Fix build problem with slang <= 2.0.6Arnaldo Carvalho de Melo1-1/+9
slang versions <= 2.0.6 have a "#if HAVE_LONG_LONG" that breaks the build if it isn't defined. Use the equivalent one that glibc has on features.h. Reported-by: Steven Rostedt <rostedt@goodmis.org> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-05-17perf probe: Don't compile CFI related code if elfutils is oldMasami Hiramatsu2-0/+7
Check elfutils version, and if it is old don't compile CFI analysis code. This allows to compile perf with old elfutils. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Tested-by: Stephane Eranian <eranian@google.com> Reported-by: Robert Richter <robert.richter@amd.com> Cc: Ingo Molnar <mingo@elte.hu> LKML-Reference: <20100510171207.26029.97604.stgit@localhost6.localdomain6> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-05-18stop_machine: Move local variable closer to the usage site in cpu_stop_cpu_callback()Ingo Molnar1-1/+4
This addresses the following compiler warning: kernel/stop_machine.c: In function 'cpu_stop_cpu_callback': kernel/stop_machine.c:297: warning: unused variable 'work' Cc: Tejun Heo <tj@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <tip-3fc1f1e27a5b807791d72e5d992aa33b668a6626@git.kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-05-17x86, hweight: Use a 32-bit popcnt for __arch_hweight32()H. Peter Anvin1-4/+6
Use a 32-bit popcnt instruction for __arch_hweight32(), even on x86-64. Even though the input register will *usually* be zero-extended due to the standard operation of the hardware, it isn't necessarily so if the input value was the result of truncating a 64-bit operation. Note: the POPCNT32 variant used on x86-64 has a technically unnecessary REX prefix to make it five bytes long, the same as a CALL instruction, therefore avoiding an unnecessary NOP. Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Cc: Borislav Petkov <borislav.petkov@amd.com> LKML-Reference: <alpine.LFD.2.00.1005171443060.4195@i5.linux-foundation.org>
2010-05-17perf tools: Add mode to build without newt supportArnaldo Carvalho de Melo1-0/+4
make NO_NEWT=1 Will avoid building the newt (tui) support. Suggested-by: Ingo Molnar <mingo@elte.hu> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-05-17cifs: fix noserverino handling when unix extensions are enabledJeff Layton3-0/+15
The uniqueid field sent by the server when unix extensions are enabled is currently used sometimes when it shouldn't be. The readdir codepath is correct, but most others are not. Fix it. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-05-17perf symbols: symbol inconsistency message should be done only at verbose=1Arnaldo Carvalho de Melo1-1/+1
That happened for an old perf.data file that had no fake MMAP events for the kernel modules, but even then it should warn once for each module, not one time for every symbol in every module not found. Reported-by: Ingo Molnar <mingo@elte.hu> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-05-17cifs: don't update uniqueid in cifs_fattr_to_inodeJeff Layton1-1/+0
We use this value to find an inode within the hash bucket, so we can't change this without re-hashing the inode. For now, treat this value as immutable. Eventually, we should probably use an inode number change on a path based operation to indicate that the lookup cache is invalid, but that's a bit more code to deal with. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-05-17cifs: always revalidate hardlinked inodes when using noserverinoJeff Layton1-0/+5
The old cifs_revalidate logic always revalidated hardlinked inodes. This hack allowed CIFS to pass some connectathon tests when server inode numbers aren't used (basic test7, in particular). Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-05-17perf tui: Add explicit -lslang optionArnaldo Carvalho de Melo1-1/+1
At least on rawhide using -lnewt is not enough if we use SLang routines directly, so add an explicit -lslang since we use SLang routines. Reported-by: Ingo Molnar <mingo@elte.hu> Tested-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-05-17m68k: amiga - Floppy platform device conversionGeert Uytterhoeven2-26/+26
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2010-05-17m68k: amiga - Sound platform device conversionGeert Uytterhoeven2-20/+36
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2010-05-17m68k: amiga - Frame buffer platform device conversionGeert Uytterhoeven2-18/+46
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2010-05-17m68k: amiga - Zorro host bridge platform device conversionGeert Uytterhoeven5-128/+190
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2010-05-17m68k: amiga - Zorro bus modalias supportGeert Uytterhoeven12-12/+66
Add Amiga Zorro bus modalias and uevent support Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2010-05-17platform: Make platform resource input parameters constGeert Uytterhoeven2-4/+6
Make the platform resource input parameters of platform_device_add_resources() and platform_device_register_simple() const, as the resources are copied and never modified. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-05-17m68k: invoke oom-killer from page faultNick Piggin1-10/+4
As explained in commit 1c0fe6e3bd, we want to call the architecture independent oom killer when getting an unexplained OOM from handle_mm_fault, rather than simply killing current. Cc: linux-m68k@lists.linux-m68k.org Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: linux-arch@vger.kernel.org Signed-off-by: Nick Piggin <npiggin@suse.de> Acked-by: David Rientjes <rientjes@google.com> [Geert] Kill 2 introduced compiler warnings Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2010-05-17serial167: Kill unused variablesGeert Uytterhoeven1-2/+0
commits 638157bc1461f6718eeca06bedd9a09cf1f35c36 ("serial167: prepare to push BKL down into drivers") and 4165fe4ef7305609a96c7f248cefb9c414d0ede5 ("tty: Fix up char drivers request_room usage") removed code without removing the corresponding variables: | drivers/char/serial167.c: In function 'cd2401_rx_interrupt': | drivers/char/serial167.c:630: warning: unused variable 'len' | drivers/char/serial167.c: In function 'cy_ioctl': | drivers/char/serial167.c:1531: warning: unused variable 'val' Remove the variables to kill the warnings. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
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