- 11 Jun, 2009 5 commits
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Paul Mackerras authored
This adds the back-end for the PMU on POWER7 processors. POWER7 has 4 fully-programmable counters and two fixed-function counters (which do respect the freeze conditions, can generate interrupts, and are writable, unlike PMC5/6 on POWER5+/6). Signed-off-by:
Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <18992.36329.189378.17992@drongo.ozlabs.ibm.com> Signed-off-by:
Ingo Molnar <mingo@elte.hu>
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Peter Zijlstra authored
We currently log hw.sample_period for PERF_SAMPLE_PERIOD, however this is incorrect. When we adjust the period, it will only take effect the next cycle but report it for the current cycle. So when we adjust the period for every cycle, we're always wrong. Solve this by keeping track of the last_period. Signed-off-by:
Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: 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> LKML-Reference: <new-submission> Signed-off-by:
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Peter Zijlstra authored
For easy extension of the sample data, put it in a structure. Signed-off-by:
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Peter Zijlstra authored
When we use variable period sampling, add the period to the sample data and use that to normalize the samples. Signed-off-by:
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Peter Zijlstra authored
Ever since Paul fixed it to unclone the context before taking the ctx->lock this became a false positive, annotate it away. Signed-off-by:
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- 10 Jun, 2009 4 commits
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Peter Zijlstra authored
Currently report and stat catch SIGINT (and others) without altering their exit state. This means that things like: while :; do perf stat ./foo ; done Loops become hard-to-interrupt, because bash never sees perf terminate due to interruption. Fix this. Signed-off-by:
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Peter Zijlstra authored
Create the counter in a disabled state and only enable it after we mmap() the buffer, this allows us to see the first few samples (and observe the frequency ramp). Furthermore, print the period in the verbose report. Signed-off-by:
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Peter Zijlstra authored
Also employ the overflow handler to adjust the frequency, this results in a stable frequency in about 40~50 samples, instead of that many ticks. This also means we can start sampling at a sample period of 1 without running head-first into the throttle. It relies on sched_clock() to accurately measure the time difference between the overflow NMIs. Signed-off-by:
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Yong Wang authored
Fix the model number of Intel Core2 processors according to the documentation: Intel Processor Identification with the CPUID Instruction: http://www.intel.com/support/processors/sb/cs-009861.htmSigned-off-by:
Yong Wang <yong.y.wang@intel.com> Also-Reported-by:
Arnd Bergmann <arnd@arndb.de> Cc: 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> LKML-Reference: <20090610090612.GA26580@ywang-moblin2.bj.intel.com> [ Added two more model numbers suggested by Arnd Bergmann ] Signed-off-by:
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- 09 Jun, 2009 1 commit
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Yong Wang authored
Correct some event and UMASK values according to Intel SDM, in the Nehalem and Atom tables. Signed-off-by:
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- 08 Jun, 2009 8 commits
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Ingo Molnar authored
The rule is: - high overhead: red - mid overhead: green - low overhead: normal (white/black) Cc: 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> LKML-Reference: <new-submission> Signed-off-by: -
Pekka Enberg authored
This patch adds support for profiling JIT generated code to 'perf report'. A JIT compiler is required to generate a "/tmp/perf-$PID.map" symbols map that is parsed when looking and displaying symbols. Thanks to Peter Zijlstra for his help with this patch! Example "perf report" output with the Jato JIT: # # (40311 samples) # # Overhead Command Shared Object Symbol # ........ ................ ......................... ...... # 97.80% jato /tmp/perf-11915.map [.] Fibonacci.fib(I)I 0.56% jato 00000000b7fa023b 0x000000b7fa023b 0.45% jato /tmp/perf-11915.map [.] Fibonacci.main([Ljava/lang/String;)V 0.38% jato [kernel] [k] get_page_from_freelist 0.06% jato [kernel] [k] kunmap_atomic 0.05% jato ./jato [.] utf8Hash 0.04% jato ./jato [.] executeJava 0.04% jato ./jato [.] defineClass Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by:Pekka Enberg <penberg@cs.helsinki.fi> Cc: a.p.zijlstra@chello.nl Cc: acme@redhat.com LKML-Reference: <Pine.LNX.4.64.0906082111590.12407@melkki.cs.Helsinki.FI> Signed-off-by:
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Peter Zijlstra authored
Some JIT compilers allocate memory for generated code with posix_memalign() + mprotect() so we need to hook into mprotect() to make sure 'perf' is aware that we're executing code in anonymous memory. [ penberg@cs.helsinki.fi: move the hook to sys_mprotect() ] Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by:
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Thomas Gleixner authored
Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
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Thomas Gleixner authored
Fill in amd_hw_cache_event_id[] with the AMD CPU specific events, for family 0x0f, 0x10 and 0x11. There's apparently no distinction between load and store events, so we only fill in the load events. Signed-off-by:
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Ingo Molnar authored
Standardize and tidy up all the messages we print during perfcounter initialization. Cc: 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> LKML-Reference: <new-submission> Signed-off-by: -
Thomas Gleixner authored
Fill in core2_hw_cache_event_id[] with the Atom model specific events. The events can be used in all the tools via the -e (--event) parameter, for example "-e l1-misses" or -"-e l2-accesses" or "-e l2-write-misses". ( Note: these are straight from the Intel manuals - not tested yet.) Signed-off-by:
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Thomas Gleixner authored
Fill in core2_hw_cache_event_id[] with the Core2 model specific events. The events can be used in all the tools via the -e (--event) parameter, for example "-e l1-misses" or -"-e l2-accesses" or "-e l2-write-misses". Signed-off-by:
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- 07 Jun, 2009 7 commits
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Ingo Molnar authored
Before: 7549326754 cycles # 3201.811 M/sec 10007594937 instructions # 4244.408 M/sec After: 7542051194 cycles # 3201.996 M/sec 10007743852 instructions # 4248.811 M/sec # 1.327 per cycle Cc: 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> LKML-Reference: <new-submission> Signed-off-by: -
Ingo Molnar authored
Before: $ perf report failed to open file: No such file or directory After: $ perf report failed to open file: perf.data (try 'perf record' first) Cc: 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> LKML-Reference: <new-submission> Signed-off-by: -
Ingo Molnar authored
If perf is run on a !CONFIG_PERF_COUNTER kernel right now it bails out with no messages or with confusing messages. Standardize this case some more and explain the situation. Cc: 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> LKML-Reference: <new-submission> Signed-off-by: -
Ingo Molnar authored
On architectures/CPUs without PMU support but with perfcounters enabled 'perf record' currently fails because it cannot create a cycle based hw-perfcounter. Fall back to the cpu-clock-tick sw-perfcounter in this case, which is hrtimer based and will always work (as long as perfcounters are enabled). Cc: 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> LKML-Reference: <new-submission> Signed-off-by: -
Ingo Molnar authored
On architectures/CPUs without PMU support but with perfcounters enabled 'perf top' currently fails because it cannot create a cycle based hw-perfcounter. Fall back to the cpu-clock-tick sw-perfcounter in this case, which is hrtimer based and will always work (as long as perfcounters is enabled). Cc: 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> LKML-Reference: <new-submission> Signed-off-by: -
Ingo Molnar authored
Before: $ perf stat ~/hackbench 5 error: syscall returned with -1 (No such device) After: $ perf stat ~/hackbench 5 Time: 1.640 Performance counter stats for '/home/mingo/hackbench 5': 6524.570382 task-clock-ticks # 3.838 CPU utilization factor 35704 context-switches # 0.005 M/sec 191 CPU-migrations # 0.000 M/sec 8958 page-faults # 0.001 M/sec <not counted> cycles <not counted> instructions <not counted> cache-references <not counted> cache-misses Wall-clock time elapsed: 1699.999995 msecs Also add -v (--verbose) option to allow the printing of failed counter opens. Plus dont print 'inf' if wall-time is zero (due to jiffies granularity), instead skip the printing of the CPU utilization factor. Cc: 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> LKML-Reference: <new-submission> Signed-off-by: -
Frederic Weisbecker authored
The first snapshot reading often occur before any events have been read in the mapped perfcounter files. Just wait until we have at least one event before starting the snapshot, or the delay before the first set of entries to be displayed may be long in case of low refresh rate. Note: we could also use a semaphore to wait before "print_entries" number of eveents is reached, but again this value is tunable and we can't ensure we will even reach it. Also we could base on a default mimimum set of entries for the first refresh, say 15, but again, the minimal sample is tunable, and we could end up displaying nothing until we have a minimal default set of events, which can take some time in case of high samples filters. Hence this simple solution which partially covers the default case. [ Impact: fix display artifacts in perf top ] Signed-off-by:
Frederic Weisbecker <fweisbeec@gmail.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <1244322643-6447-1-git-send-email-fweisbec@gmail.com> Signed-off-by:
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- 06 Jun, 2009 15 commits
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Ingo Molnar authored
Arjan noticed this bug in the perf annotate help output: -s, --symbol <file> symbol to annotate that should be <symbol> instead. Reported-by:Arjan van de Ven <arjan@linux.intel.com> Cc: 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> LKML-Reference: <new-submission> Signed-off-by:
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Arjan van de Ven authored
the "perf report" utility crashed in some circumstances because the "sym" stack variable was not initialized before used (as also proven by valgrind). With this fix both the crash goes away and valgrind no longer complains. Signed-off-by:
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Ingo Molnar authored
Right now kernel debug info does not get resolved by default, because we dont know where to look for the vmlinux. The -k option can be used for that - but if no option is given, pick up vmlinux files in the current directory - in case a kernel hacker runs profiling from the source directory that the kernel was built in. The real solution would be to embedd the location (and perhaps the date/timestamp) of the vmlinux file in /proc/kallsyms, so that tools can pick it up automatically. Cc: 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> LKML-Reference: <new-submission> Signed-off-by: -
Ingo Molnar authored
gcc warned about this bug: util/parse-events.c: In function ‘parse_generic_hw_symbols’: util/parse-events.c:175: warning: comparison is always false due to limited range of data type util/parse-events.c:182: warning: comparison is always false due to limited range of data type util/parse-events.c:190: warning: comparison is always false due to limited range of data type Cc: 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> LKML-Reference: <new-submission> Signed-off-by: -
Arjan van de Ven authored
Cc: 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> LKML-Reference: <new-submission> Signed-off-by: -
Ingo Molnar authored
Several people have suggested that 'perf' has become a full-fledged tool that should be moved out of Documentation/. Move it to the (new) tools/ directory. Cc: 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> LKML-Reference: <new-submission> Signed-off-by: -
Ingo Molnar authored
Merge reason: Pick up the latest fixes before the -v8 perfcounters release. Signed-off-by: -
Ingo Molnar authored
Add new perf sub-command to display annotated source code: $ perf annotate decode_tree_entry ------------------------------------------------ Percent | Source code & Disassembly of /home/mingo/git/git ------------------------------------------------ : : /home/mingo/git/git: file format elf64-x86-64 : : : Disassembly of section .text: : : 00000000004a0da0 <decode_tree_entry>: : *modep = mode; : return str; : } : : static void decode_tree_entry(struct tree_desc *desc, const char *buf, unsigned long size) : { 3.82 : 4a0da0: 41 54 push %r12 : const char *path; : unsigned int mode, len; : : if (size < 24 || buf[size - 21]) 0.17 : 4a0da2: 48 83 fa 17 cmp $0x17,%rdx : *modep = mode; : return str; : } : : static void decode_tree_entry(struct tree_desc *desc, const char *buf, unsigned long size) : { 0.00 : 4a0da6: 49 89 fc mov %rdi,%r12 0.00 : 4a0da9: 55 push %rbp 3.37 : 4a0daa: 53 push %rbx : const char *path; : unsigned int mode, len; : : if (size < 24 || buf[size - 21]) 0.08 : 4a0dab: 76 73 jbe 4a0e20 <decode_tree_entry+0x80> 0.00 : 4a0dad: 80 7c 16 eb 00 cmpb $0x0,-0x15(%rsi,%rdx,1) 3.48 : 4a0db2: 75 6c jne 4a0e20 <decode_tree_entry+0x80> : static const char *get_mode(const char *str, unsigned int *modep) : { : unsigned char c; : unsigned int mode = 0; : : if (*str == ' ') 1.94 : 4a0db4: 0f b6 06 movzbl (%rsi),%eax 0.39 : 4a0db7: 3c 20 cmp $0x20,%al 0.00 : 4a0db9: 74 65 je 4a0e20 <decode_tree_entry+0x80> : return NULL; : : while ((c = *str++) != ' ') { 0.06 : 4a0dbb: 89 c2 mov %eax,%edx : if (c < '0' || c > '7') 1.99 : 4a0dbd: 31 ed xor %ebp,%ebp : unsigned int mode = 0; : : if (*str == ' ') : return NULL; : : while ((c = *str++) != ' ') { 1.74 : 4a0dbf: 48 8d 5e 01 lea 0x1(%rsi),%rbx : if (c < '0' || c > '7') 0.00 : 4a0dc3: 8d 42 d0 lea -0x30(%rdx),%eax 0.17 : 4a0dc6: 3c 07 cmp $0x7,%al 0.00 : 4a0dc8: 76 0d jbe 4a0dd7 <decode_tree_entry+0x37> 0.00 : 4a0dca: eb 54 jmp 4a0e20 <decode_tree_entry+0x80> 0.00 : 4a0dcc: 0f 1f 40 00 nopl 0x0(%rax) 16.57 : 4a0dd0: 8d 42 d0 lea -0x30(%rdx),%eax 0.14 : 4a0dd3: 3c 07 cmp $0x7,%al 0.00 : 4a0dd5: 77 49 ja 4a0e20 <decode_tree_entry+0x80> : return NULL; : mode = (mode << 3) + (c - '0'); 3.12 : 4a0dd7: 0f b6 c2 movzbl %dl,%eax : unsigned int mode = 0; : : if (*str == ' ') : return NULL; : : while ((c = *str++) != ' ') { 0.00 : 4a0dda: 0f b6 13 movzbl (%rbx),%edx 16.74 : 4a0ddd: 48 83 c3 01 add $0x1,%rbx : if (c < '0' || c > '7') : return NULL; : mode = (mode << 3) + (c - '0'); The first column is the percentage of samples that arrived on that particular line - relative to the total cost of the function. Cc: 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> LKML-Reference: <new-submission> Signed-off-by: -
Ingo Molnar authored
Prepare for the 'perf annotate' implementation by splitting off builtin-annotate.c from builtin-report.c. ( We keep this commit separate to ease the later librarization of the facilities that perf-report and perf-annotate shares. ) Cc: 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> LKML-Reference: <new-submission> Signed-off-by: -
Ingo Molnar authored
Also fix a misalignment in usage string printing. Cc: 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> LKML-Reference: <new-submission> Signed-off-by: -
Ingo Molnar authored
Also add perf list to command-list.txt. Cc: 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> LKML-Reference: <new-submission> Signed-off-by: -
Thomas Gleixner authored
Also update other areas of the help texts. Signed-off-by:
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Ingo Molnar authored
Also standardize the cache printout (so that it can be pasted back into the command) and sort out the aliases. Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <new-submission> Signed-off-by: -
Thomas Gleixner authored
perf list: List all the available event types which can be used in -e (--event) options. Signed-off-by:
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Ingo Molnar authored
Extend generic event enumeration with the PERF_TYPE_HW_CACHE method. This is a 3-dimensional space: { L1-D, L1-I, L2, ITLB, DTLB, BPU } x { load, store, prefetch } x { accesses, misses } User-space passes in the 3 coordinates and the kernel provides a counter. (if the hardware supports that type and if the combination makes sense.) Combinations that make no sense produce a -EINVAL. Combinations that are not supported by the hardware produce -ENOTSUP. Extend the tools to deal with this, and rewrite the event symbol parsing code with various popular aliases for the units and access methods above. So 'l1-cache-miss' and 'l1d-read-ops' are both valid aliases. ( x86 is supported for now, with the Nehalem event table filled in, and with Core2 and Atom having placeholder tables. ) Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <new-submission> Signed-off-by:
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