kernel/linux.git/tools/perf/arch/x86, branch linux-4.7.y

perf intel-pt: Fix occasional decoding errors when tracing system-wide

2016-09-07T06:34:44+00:00

commit 3d918fb13abdbeca7947578f5d7e426eafad7f5e upstream. In order to successfully decode Intel PT traces, context switch events are needed from the moment the trace starts. Currently that is ensured by using the 'immediate' flag which enables the switch event when it is opened. However, since commit 86c2786994bd ("perf intel-pt: Add support for PERF_RECORD_SWITCH") that might not always happen. When tracing system-wide the context switch event is added to the tracking event which was not set as 'immediate'. Change that so it is. Signed-off-by: Adrian Hunter Cc: Jiri Olsa Fixes: 86c2786994bd ("perf intel-pt: Add support for PERF_RECORD_SWITCH") Link: http://lkml.kernel.org/r/1471245784-22580-1-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Greg Kroah-Hartman

perf tools: Update x86's syscall_64.tbl, adding preadv2 & pwritev2

2016-04-26T16:15:02+00:00

Introduced in commit 4babf2c5efb7 ("x86: wire up preadv2 and pwritev2"). This will make 'perf trace' aware of them. Cc: Adrian Hunter Cc: David Ahern Cc: Jiri Olsa Cc: Milian Wolff Cc: Namhyung Kim Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-vojoylgce2cetsy36446s5ny@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Make the x86 clean quiet

2016-04-25T20:56:15+00:00

Turn current clean output: $ make clean rm -f arch/x86/include/generated/asm/syscalls_64.c CLEAN libbpf CLEAN libapi into: $ make clean CLEAN x86 CLEAN libapi CLEAN libbpf Signed-off-by: Jiri Olsa Tested-by: Arnaldo Carvalho de Melo Cc: David Ahern Cc: Namhyung Kim Cc: Peter Zijlstra Cc: TJ Link: http://lkml.kernel.org/r/1461615438-27894-1-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf evsel: Do not use globals in config()

2016-04-12T01:18:20+00:00

Instead receive a callchain_param pointer to configure callchain aspects, not doing so if NULL is passed. This will allow fine grained control over which evsels in an evlist gets callchains enabled. Cc: Adrian Hunter Cc: David Ahern Cc: Jiri Olsa Cc: Milian Wolff Cc: Namhyung Kim Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-2mupip6khc92mh5x4nw9to82@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf dwarf: Guard !x86_64 definitions under #ifdef else clause

2016-04-08T15:04:29+00:00

To fix the build on Fedora Rawhide (gcc 6.0.0 20160311 (Red Hat 6.0.0-0.17): CC /tmp/build/perf/arch/x86/util/dwarf-regs.o arch/x86/util/dwarf-regs.c:66:36: error: 'x86_32_regoffset_table' defined but not used [-Werror=unused-const-variable=] static const struct pt_regs_offset x86_32_regoffset_table[] = { ^~~~~~~~~~~~~~~~~~~~~~ cc1: all warnings being treated as errors Cc: Adrian Hunter Cc: David Ahern Cc: Jiri Olsa Cc: Namhyung Kim Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-fghuksc1u8ln82bof4lwcj0o@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Build syscall table .c header from kernel's syscall_64.tbl

2016-04-08T12:58:14+00:00

We used libaudit to map ids to syscall names and vice-versa, but that imposes a delay in supporting new syscalls, having to wait for libaudit to get those new syscalls on its tables. To remove that delay, for x86_64 initially, grab a copy of arch/x86/entry/syscalls/syscall_64.tbl and use it to generate those tables. Syscalls currently not available in audit-libs: # trace -e copy_file_range,membarrier,mlock2,pread64,pwrite64,timerfd_create,userfaultfd Error: Invalid syscall copy_file_range, membarrier, mlock2, pread64, pwrite64, timerfd_create, userfaultfd Hint: try 'perf list syscalls:sys_enter_*' Hint: and: 'man syscalls' # With this patch: # trace -e copy_file_range,membarrier,mlock2,pread64,pwrite64,timerfd_create,userfaultfd 8505.733 ( 0.010 ms): gnome-shell/2519 timerfd_create(flags: 524288) = 36 8506.688 ( 0.005 ms): gnome-shell/2519 timerfd_create(flags: 524288) = 40 30023.097 ( 0.025 ms): qemu-system-x8/24629 pwrite64(fd: 18, buf: 0x7f63ae382000, count: 4096, pos: 529592320) = 4096 31268.712 ( 0.028 ms): qemu-system-x8/24629 pwrite64(fd: 18, buf: 0x7f63afd8b000, count: 4096, pos: 2314133504) = 4096 31268.854 ( 0.016 ms): qemu-system-x8/24629 pwrite64(fd: 18, buf: 0x7f63afda2000, count: 4096, pos: 2314137600) = 4096 Cc: Adrian Hunter Cc: David Ahern Cc: Jiri Olsa Cc: Namhyung Kim Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-51xfjbxevdsucmnbc4ka5r88@git.kernel.org [ Added make dep for 'prepare' in 'LIBPERF_IN', fix by Wang Nan to fix parallell build ] Signed-off-by: Arnaldo Carvalho de Melo

perf intel-pt/bts: Define JITDUMP_USE_ARCH_TIMESTAMP

2016-04-01T21:46:24+00:00

For Intel PT / BTS, define the environment variable that selects TSC timestamps in the jitdump file. Signed-off-by: Adrian Hunter Cc: Jiri Olsa Cc: Stephane Eranian Link: http://lkml.kernel.org/r/1457426333-30260-1-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo

perf jit: Add support for using TSC as a timestamp

2016-04-01T21:42:55+00:00

Intel PT uses TSC as a timestamp, so add support for using TSC instead of the monotonic clock. Use of TSC is selected by an environment variable "JITDUMP_USE_ARCH_TIMESTAMP" and flagged in the jitdump file with flag JITDUMP_FLAGS_ARCH_TIMESTAMP. Signed-off-by: Adrian Hunter Cc: Alexander Shishkin Cc: He Kuang Cc: Jiri Olsa Cc: Josh Poimboeuf Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Sukadev Bhattiprolu Cc: Wang Nan Link: http://lkml.kernel.org/r/1457426330-30226-1-git-send-email-adrian.hunter@intel.com [ Added the fixup from He Kuang to make it build on other arches, ] [ such as aarch64, to avoid inserting this bisectiong breakage upstream ] Link: http://lkml.kernel.org/r/1459482572-129494-1-git-send-email-hekuang@huawei.com Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Add time conversion event

2016-03-31T13:52:24+00:00

Intel PT uses the time members from the perf_event_mmap_page to convert between TSC and perf time. Due to a lack of foresight when Intel PT was implemented, those time members were recorded in the (implementation dependent) AUXTRACE_INFO event, the structure of which is generally inaccessible outside of the Intel PT decoder. However now the conversion between TSC and perf time is needed when processing a jitdump file when Intel PT has been used for tracing. So add a user event to record the time members. 'perf record' will synthesize the event if the information is available. And session processing will put a copy of the event on the session so that tools like 'perf inject' can easily access it. Signed-off-by: Adrian Hunter Cc: Jiri Olsa Cc: Stephane Eranian Link: http://lkml.kernel.org/r/1457426324-30158-1-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo

perf jitdump: Build only on supported archs

2016-03-10T19:33:19+00:00

Build jitdump only on architectures defined in util/genelf.h file, to avoid breaking the build on such arches. Signed-off-by: Jiri Olsa Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: Borislav Petkov Cc: Colin Ian King Cc: David Ahern Cc: Davidlohr Bueso Cc: He Kuang Cc: Mel Gorman Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Steven Rostedt Cc: Wang Nan Link: http://lkml.kernel.org/r/20160310164113.GA11357@krava.redhat.com Signed-off-by: Arnaldo Carvalho de Melo