- 21 9月, 2009 5 次提交
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由 Ingo Molnar 提交于
Bye-bye Performance Counters, welcome Performance Events! In the past few months the perfcounters subsystem has grown out its initial role of counting hardware events, and has become (and is becoming) a much broader generic event enumeration, reporting, logging, monitoring, analysis facility. Naming its core object 'perf_counter' and naming the subsystem 'perfcounters' has become more and more of a misnomer. With pending code like hw-breakpoints support the 'counter' name is less and less appropriate. All in one, we've decided to rename the subsystem to 'performance events' and to propagate this rename through all fields, variables and API names. (in an ABI compatible fashion) The word 'event' is also a bit shorter than 'counter' - which makes it slightly more convenient to write/handle as well. Thanks goes to Stephane Eranian who first observed this misnomer and suggested a rename. User-space tooling and ABI compatibility is not affected - this patch should be function-invariant. (Also, defconfigs were not touched to keep the size down.) This patch has been generated via the following script: FILES=$(find * -type f | grep -vE 'oprofile|[^K]config') sed -i \ -e 's/PERF_EVENT_/PERF_RECORD_/g' \ -e 's/PERF_COUNTER/PERF_EVENT/g' \ -e 's/perf_counter/perf_event/g' \ -e 's/nb_counters/nb_events/g' \ -e 's/swcounter/swevent/g' \ -e 's/tpcounter_event/tp_event/g' \ $FILES for N in $(find . -name perf_counter.[ch]); do M=$(echo $N | sed 's/perf_counter/perf_event/g') mv $N $M done FILES=$(find . -name perf_event.*) sed -i \ -e 's/COUNTER_MASK/REG_MASK/g' \ -e 's/COUNTER/EVENT/g' \ -e 's/\<event\>/event_id/g' \ -e 's/counter/event/g' \ -e 's/Counter/Event/g' \ $FILES ... to keep it as correct as possible. This script can also be used by anyone who has pending perfcounters patches - it converts a Linux kernel tree over to the new naming. We tried to time this change to the point in time where the amount of pending patches is the smallest: the end of the merge window. Namespace clashes were fixed up in a preparatory patch - and some stylistic fallout will be fixed up in a subsequent patch. ( NOTE: 'counters' are still the proper terminology when we deal with hardware registers - and these sed scripts are a bit over-eager in renaming them. I've undone some of that, but in case there's something left where 'counter' would be better than 'event' we can undo that on an individual basis instead of touching an otherwise nicely automated patch. ) Suggested-by: NStephane Eranian <eranian@google.com> Acked-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: NPaul Mackerras <paulus@samba.org> Reviewed-by: NArjan van de Ven <arjan@linux.intel.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: David Howells <dhowells@redhat.com> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: <linux-arch@vger.kernel.org> LKML-Reference: <new-submission> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Ingo Molnar 提交于
In preparation to the renames, to avoid a namespace clash. Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <new-submission> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Paul Mackerras 提交于
Commit 5622f295 ("x86, perf_counter, bts: Optimize BTS overflow handling") removed the regs field from struct perf_sample_data and added a regs parameter to perf_counter_overflow(). This breaks the build on powerpc (and Sparc) as reported by Sachin Sant: arch/powerpc/kernel/perf_counter.c: In function 'record_and_restart': arch/powerpc/kernel/perf_counter.c:1165: error: unknown field 'regs' specified in initializer This adjusts arch/powerpc/kernel/perf_counter.c to correspond with the new struct perf_sample_data and perf_counter_overflow(). [ v2: also fix Sparc, Markus Metzger <markus.t.metzger@intel.com> ] Reported-by: NSachin Sant <sachinp@in.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org> Cc: Markus Metzger <markus.t.metzger@intel.com> Cc: David S. Miller <davem@davemloft.net> Cc: benh@kernel.crashing.org Cc: linuxppc-dev@ozlabs.org Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <19127.8400.376239.586120@drongo.ozlabs.ibm.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Linus Torvalds 提交于
Ingo points out that I screwed up when merging the 'timers-for-linus' branch in commit a03fdb76. A bit too much copy-and-pasting caused the end result to have an extraneous 'return' in the middle of an expression. That was obviously bogus. Blush. Reported-by-with-patch: Ingo Molnar <mingo@elte.hu> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Peter Zijlstra 提交于
Dave noticed that we leak the PMU resource reservations when we fail the hardware counter init. Reported-by: NDavid Miller <davem@davemloft.net> Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: NDavid Miller <davem@davemloft.net> LKML-Reference: <1252483487.7746.164.camel@twins> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 20 9月, 2009 8 次提交
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由 Jaswinder Singh Rajput 提交于
fix the following 'make includecheck' warning: arch/x86/kernel/cpu/common.c: linux/smp.h is included more than once. Signed-off-by: NJaswinder Singh Rajput <jaswinderrajput@gmail.com> Cc: Alan Cox <alan@linux.intel.com> Cc: Ingo Molnar <mingo@elte.hu> LKML-Reference: <1252087783.6385.10.camel@ht.satnam>
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由 Jaswinder Singh Rajput 提交于
fix the following 'make includecheck' warning: arch/x86/mm/kmemcheck/shadow.c: linux/module.h is included more than once. Signed-off-by: NJaswinder Singh Rajput <jaswinderrajput@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Sam Ravnborg <sam@ravnborg.org> LKML-Reference: <1247065179.4382.51.camel@ht.satnam>
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由 Jaswinder Singh Rajput 提交于
fix the following 'make includecheck' warning: arch/x86/kernel/traps.c: asm/traps.h is included more than once. Signed-off-by: NJaswinder Singh Rajput <jaswinderrajput@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Sam Ravnborg <sam@ravnborg.org> LKML-Reference: <1247065094.4382.49.camel@ht.satnam>
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由 Jaswinder Singh Rajput 提交于
fix the following 'make includecheck' warning: arch/um/os-Linux/helper.c: linux/limits.h is included more than once. Signed-off-by: NJaswinder Singh Rajput <jaswinderrajput@gmail.com> Cc: jdike@addtoit.com Cc: Sam Ravnborg <sam@ravnborg.org> LKML-Reference: <1247064950.4382.45.camel@ht.satnam> Acked-by: NWANG Cong <xiyou.wangcong@gmail.com>
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由 Jaswinder Singh Rajput 提交于
fix the following 'make includecheck' warning: arch/s390/kernel/sys_s390.c: linux/syscalls.h is included more than once. Signed-off-by: NJaswinder Singh Rajput <jaswinderrajput@gmail.com> Cc: schwidefsky@de.ibm.com Cc: heiko.carstens@de.ibm.com Cc: Sam Ravnborg <sam@ravnborg.org> LKML-Reference: <1247068809.4382.111.camel@ht.satnam>
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由 Alan Cox 提交于
We moved this into uart_state, now move the fields out of the separate structure and kill it off. Signed-off-by: NAlan Cox <alan@linux.intel.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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由 Kay Sievers 提交于
This allows subsytems to provide devtmpfs with non-default permissions for the device node. Instead of the default mode of 0600, null, zero, random, urandom, full, tty, ptmx now have a mode of 0666, which allows non-privileged processes to access standard device nodes in case no other userspace process applies the expected permissions. This also fixes a wrong assignment in pktcdvd and a checkpatch.pl complain. Signed-off-by: NKay Sievers <kay.sievers@vrfy.org> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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由 Arjan van de Ven 提交于
The "end of a C state" trace point currently happens before the code runs that corrects the TSC for having stopped during idle. The result of this is that the timestamp of the end-of-C-state event is garbage on cpus where the TSC stops during idle. This patch moves the end point of the C state to after the timekeeping engine of the kernel has been corrected. Signed-off-by: NArjan van de Ven <arjan@linux.intel.com> Cc: Len Brown <len.brown@intel.com> Cc: fweisbec@gmail.com Cc: peterz@infradead.org Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <20090919133533.139c2a46@infradead.org> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 19 9月, 2009 5 次提交
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由 Arjan van de Ven 提交于
This patch converts the existing power tracer into an event tracer, so that power events (C states and frequency changes) can be tracked via "perf". This also removes the perl script that was used to demo the tracer; its functionality is being replaced entirely with timechart. Signed-off-by: NArjan van de Ven <arjan@linux.intel.com> Acked-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <20090912130542.6d314860@infradead.org> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Geoffrey Thomas 提交于
Signed-off-by: NGeoffrey Thomas <geofft@ksplice.com> Signed-off-by: NTim Abbott <tabbott@ksplice.com> Acked-by: NSam Ravnborg <sam@ravnborg.org> Acked-by: NDavid S. Miller <davem@davemloft.net> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Nelson Elhage 提交于
This is largely a straightforward conversion. The patch results in fewer output sections, and some data being reordered, but should have no functional impact. Also, note that this patch moves some data (namely, init_task and cacheline-aligned) inside [_sdata,_edata]. Because frv already builds using -ffunction-sections -fdata-sections, we can't use BSS_SECTION or RW_DATA_SECTION yet, since they do not currently include the required .bss.* and .data.* sections. Signed-off-by: NNelson Elhage <nelhage@ksplice.com> Acked-by: NDavid Howells <dhowells@redhat.com> Signed-off-by: NTim Abbott <tabbott@ksplice.com> Acked-by: NSam Ravnborg <sam@ravnborg.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Nelson Elhage 提交于
It appears that frv copied the .altinstructions definitions in its linker script from x86. Since frv doesn't put anything in those sections, this is just dead code. Signed-off-by: NNelson Elhage <nelhage@ksplice.com> Acked-by: NDavid Howells <dhowells@redhat.com> Signed-off-by: NTim Abbott <tabbott@ksplice.com> Acked-by: NSam Ravnborg <sam@ravnborg.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Markus Metzger 提交于
Draining the BTS buffer on a buffer overflow interrupt takes too long resulting in a kernel lockup when tracing the kernel. Restructure perf_counter sampling into sample creation and sample output. Prepare a single reference sample for BTS sampling and update the from and to address fields when draining the BTS buffer. Drain the entire BTS buffer between a single perf_output_begin() / perf_output_end() pair. Signed-off-by: NMarkus Metzger <markus.t.metzger@intel.com> Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <20090915130023.A16204@sedona.ch.intel.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 18 9月, 2009 22 次提交
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由 Suresh Siddha 提交于
Recent enhancement of rb-tree based lookup exposed a bug with the lookup mechanism in the reserve_memtype() which ensures that there are no conflicting memtype requests for the memory range. memtype_rb_search() returns an entry which has a start address <= new start address. And from here we traverse the linear linked list to check if there any conflicts with the existing mappings. As the rbtree is based on the start address of the memory range, it is quite possible that we have several overlapped mappings whose start address is much less than new requested start but the end is >= new requested end. This results in conflicting memtype mappings. Same bug exists with the old code which uses cached_entry from where we traverse the linear linked list. But the new rb-tree code exposes this bug fairly easily. For now, don't use the memtype_rb_search() and always start the search from the head of linear linked list in reserve_memtype(). Linear linked list for most of the systems grow's to few 10's of entries(as we track memory type of RAM pages using struct page). So we should be ok for now. We still retain the rbtree and use it to speed up free_memtype() which doesn't have the same bug(as we know what exactly we are searching for in free_memtype). Also use list_for_each_entry_from() in free_memtype() so that we start the search from rb-tree lookup result. Reported-by: NMarkus Trippelsdorf <markus@trippelsdorf.de> Signed-off-by: NSuresh Siddha <suresh.b.siddha@intel.com> Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> LKML-Reference: <1253136483.4119.12.camel@sbs-t61.sc.intel.com> Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
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由 Christian Borntraeger 提交于
commit 85bac32c ring-buffer: only enable ring_buffer_swap_cpu when needed broke oprofile (at least on s390, but likely on all platforms). this patch lets oprofile select RING_BUFER_ALLOW_SWAP to make ring_buffer_swap_cpu usable for oprofile. Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com> LKML-Reference: <200909162156.49239.borntraeger@de.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Robert Richter <robert.richter@amd.com> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 Maxime Bizon 提交于
Signed-off-by: NMaxime Bizon <mbizon@freebox.fr> Signed-off-by: NFlorian Fainelli <florian@openwrt.org> Signed-off-by: NDavid S. Miller <davem@davemloft.net> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Maxime Bizon 提交于
Signed-off-by: NMaxime Bizon <mbizon@freebox.fr> Signed-off-by: NFlorian Fainelli <florian@openwrt.org> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Maxime Bizon 提交于
Todo: Nothing ever detects CPU_BCM6338 but the code tests for it anyway. Signed-off-by: NMaxime Bizon <mbizon@freebox.fr> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 David Daney 提交于
There is a bunch of platform device registration in arch/mips/cavium-octeon/setup.c. We move it to its own file in preparation for adding more platform devices. Signed-off-by: NDavid Daney <ddaney@caviumnetworks.com> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 David Daney 提交于
The code after the vmalloc_fault: label in do_page_fault() modifies user page tables, this is not correct for 64-bit kernels. For 64-bit kernels we should go straight to the no_context handler skipping vmalloc_fault. Signed-off-by: NDavid Daney <ddaney@caviumnetworks.com> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Wu Fei 提交于
By combining swapper_pg_dir and module_pg_dir, several if conditions can be eliminated from the tlb exception handler. The reason they can be combined is that, the effective virtual address of vmalloc returned is at the bottom, and of module_alloc returned is at the top. It also fixes the bug in vmalloc(), which happens when its return address is not covered by the first pgd. Signed-off-by: NWu Fei <at.wufei@gmail.com> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Manuel Lauss 提交于
loops_per_jiffy depends on coreclk speed; preset it instead of letting the kernel waste precious microseconds trying to approximate it. Signed-off-by: NManuel Lauss <manuel.lauss@gmail.com> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 David Daney 提交于
Add a platform device for the Octeon Random Number Generator (RNG). Signed-off-by: NDavid Daney <ddaney@caviumnetworks.com> Acked-by: NHerbert Xu <herbert@gondor.apana.org.au> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Ralf Baechle 提交于
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Manuel Lauss 提交于
Eliminate the 'allow_au1k_wait' variable. MIPS kernel installs the Alchemy-specific wait code before timer initialization; if the C0 timer must be used for timekeeping the wait function is set to NULL which means no wait implementation is available. As a sideeffect, the 'wait instruction available' output in /proc/cpuinfo now correctly indicates whether 'wait' is usable. Run-tested on DB1200. Signed-off-by: NManuel Lauss <manuel.lauss@gmail.com> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 David Daney 提交于
Signed-off-by: NDavid Daney <ddaney@caviumnetworks.com> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 David Daney 提交于
On some CPUs, it is more efficient to disable and enable interrupts in the kernel rather than use ll/sc for atomic operations. But if we were to set cpu_has_llsc to false, we would break the userspace futex interface (in asm/futex.h). We separate the two concepts, with a new predicate kernel_uses_llsc, that lets us disable the kernel's use of ll/sc while still allowing the futex code to use it. Also there were a couple of cases in bitops.h where we were using ll/sc unconditionally even if cpu_has_llsc were false. Signed-off-by: NDavid Daney <ddaney@caviumnetworks.com> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Ralf Baechle 提交于
CONFIG_CPU_HAS_LLSC duplicated the function of cpu_has_llsc for no good reason and and the results if the one was enabled and the other disabled was very unobvious. Remove it now that there are no more remaining users. Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Ralf Baechle 提交于
All CPUs for Malta support LL/SC. Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Ralf Baechle 提交于
This also means there is now only one implementation not 3 left. Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Ralf Baechle 提交于
This way it doesn't have to use CONFIG_CPU_HAS_LLSC anymore. Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Ralf Baechle 提交于
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Nelson Elhage 提交于
This patch results in fewer output sections and in some data being reordered, but should have no functional impact. Signed-off-by: NNelson Elhage <nelhage@ksplice.com> Signed-off-by: NTim Abbott <tabbott@ksplice.com> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Nelson Elhage 提交于
Now that PAGE_SIZE is available to assembly directly, there is no need to separately expose it as _PAGE_SIZE through asm-offsets. In addition, remove _PAGE_SHIFT from asm-offsets, since it was never needed, and is not used anywhere. Signed-off-by: NNelson Elhage <nelhage@ksplice.com> Signed-off-by: NTim Abbott <tabbott@ksplice.com> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Christoph Hellwig 提交于
Signed-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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