1. 31 Jul, 2018 15 commits
    • Leo Yan's avatar
      perf cs-etm: Fix start tracing packet handling · 3eb3e07b
      Leo Yan authored
      Usually the start tracing packet is a CS_ETM_TRACE_ON packet, this
      packet is passed to cs_etm__flush();  cs_etm__flush() will check the
      condition 'prev_packet->sample_type == CS_ETM_RANGE' but 'prev_packet'
      is allocated by zalloc() so 'prev_packet->sample_type' is zero in
      initialization and this condition is false.  So cs_etm__flush() will
      directly bail out without handling the start tracing packet.
      
      This patch is to introduce a new sample type CS_ETM_EMPTY, which is used
      to indicate the packet is an empty packet.  cs_etm__flush() will swap
      packets when it finds the previous packet is empty, so this can record
      the start tracing packet into 'etmq->prev_packet'.
      Signed-off-by: default avatarLeo Yan <leo.yan@linaro.org>
      Reviewed-by: default avatarMathieu Poirier <mathieu.poirier@linaro.org>
      Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Kim Phillips <kim.phillips@arm.com>
      Cc: Mike Leach <mike.leach@linaro.org>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Robert Walker <robert.walker@arm.com>
      Cc: linux-arm-kernel@lists.infradead.org
      Link: http://lkml.kernel.org/r/1531295145-596-4-git-send-email-leo.yan@linaro.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      3eb3e07b
    • Thomas Richter's avatar
      perf build: Fix installation directory for eBPF · 83868bf7
      Thomas Richter authored
      The perf tool build and install is controlled via a Makefile. The
      'install' rule creates directories and copies files. Among them are
      header files installed in /usr/lib/include/perf/bpf/.
      
      However all listed examples are installing its header files in
      
        /usr/lib/<tool-name>/...[/include]/header.h
      
      and not in
      
        /usr/lib/include/<tool-name>/.../header.h.
      
      Background information:
      
      Building the Fedora 28 glibc RPM on s390x and s390 fails on s390 (gcc
      -m31) as gcc is not able to find header-files like stdbool.h.
      
      In the glibc.spec file, you can see that glibc is configured with
      "--with-headers". In this case, first -nostdinc is added to the CFLAGS
      and then further include paths are added via -isystem.  One of those
      paths should contain header files like stdbool.h.
      
      In order to get this path, gcc is invoked with:
      
      - on Fedora 28 (with 4.18 kernel):
      
        $ gcc -print-file-name=include
        /usr/lib/gcc/s390x-redhat-linux/8/include
        $ gcc -m31 -print-file-name=include
        /usr/lib/gcc/s390x-redhat-linux/8/../../../../lib/include
        => If perf is installed, this is: /usr/lib/include
        On my machine this directory is only containing the directory "perf".
        If perf is not installed gcc returns: /usr/lib/gcc/s390x-redhat-linux/8/include
      
      - on Ubuntu 18.04 (with 4.15 kernel):
      
        $ gcc  -print-file-name=include
        /usr/lib/gcc/s390x-linux-gnu/7/include
        $ gcc -m31 -print-file-name=include
        /usr/lib/gcc/s390x-linux-gnu/7/include
        => gcc returns the correct path even if perf is installed.
      
      In each case, the introduction of the subdirectory /usr/lib/include
      leads to the regression that one can not build the glibc RPM for s390
      anymore as gcc can not find headers like stdbool.h.
      
      To remedy this install bpf.h to /usr/lib/perf/include/bpf/bpf.h
      
      Output before using the command 'perf test -Fv 40':
      
        echo '...[bpf-program-source]...' | /usr/bin/clang ... \
      		   -I/root/lib/include/perf/bpf ...
                                     ^^^^^^^^^^^^
      ...
        [root@p23lp27 perf]# perf test -F 40
        40: BPF filter                                            :
        40.1: Basic BPF filtering                                 : Ok
        40.2: BPF pinning                                         : Ok
        40.3: BPF prologue generation                             : Ok
        40.4: BPF relocation checker                              : Ok
        [root@p23lp27 perf]#
      
      Output after using command 'perf test -Fv 40':
      
        echo '...[bpf-program-source]...' | /usr/bin/clang ... \
      		 -I/root/lib/perf/include/bpf ...
                                   ^^^^^^^^^^^^
      ...
        [root@p23lp27 perf]# perf test -F 40
        40: BPF filter                                            :
        40.1: Basic BPF filtering                                 : Ok
        40.2: BPF pinning                                         : Ok
        40.3: BPF prologue generation                             : Ok
        40.4: BPF relocation checker                              : Ok
        [root@p23lp27 perf]#
      
      Committer testing:
      
      While the above 'perf test -F 40' (or 'perf test bpf') will allow us
      to see that the correct path is now added via -I, to actually test this
      we better try to use a bpf script that includes files in the changed
      directory.
      
      We have the files that now reside in /root/lib/perf/examples/bpf/ to do
      just that:
      
        # tail -8 /root/lib/perf/examples/bpf/5sec.c
        #include <bpf.h>
      
        int probe(hrtimer_nanosleep, rqtp->tv_sec)(void *ctx, int err, long sec)
        {
      	  return sec == 5;
        }
      
        license(GPL);
        # perf trace -e *sleep -e /root/lib/perf/examples/bpf/5sec.c sleep 4
             0.333 (4000.086 ms): sleep/9248 nanosleep(rqtp: 0x7ffc155f3300) = 0
        # perf trace -e *sleep -e /root/lib/perf/examples/bpf/5sec.c sleep 5
             0.287 (         ): sleep/9659 nanosleep(rqtp: 0x7ffeafe38200) ...
             0.290 (         ): perf_bpf_probe:hrtimer_nanosleep:(ffffffff9911efe0) tv_sec=5
             0.287 (5000.059 ms): sleep/9659  ... [continued]: nanosleep()) = 0
        # perf trace -e *sleep -e /root/lib/perf/examples/bpf/5sec.c sleep 6
             0.247 (5999.951 ms): sleep/10068 nanosleep(rqtp: 0x7fff2086d900) = 0
        # perf trace -e *sleep -e /root/lib/perf/examples/bpf/5sec.c sleep 5.987
             0.293 (         ): sleep/10489 nanosleep(rqtp: 0x7ffdd4fc10e0) ...
             0.296 (         ): perf_bpf_probe:hrtimer_nanosleep:(ffffffff9911efe0) tv_sec=5
             0.293 (5986.912 ms): sleep/10489  ... [continued]: nanosleep()) = 0
        #
      Suggested-by: default avatarStefan Liebler <stli@linux.ibm.com>
      Suggested-by: default avatarArnaldo Carvalho de Melo <acme@kernel.org>
      Signed-off-by: default avatarThomas Richter <tmricht@linux.ibm.com>
      Reviewed-by: default avatarHendrik Brueckner <brueckner@linux.ibm.com>
      Tested-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Fixes: 1b16fffa ("perf llvm-utils: Add bpf include path to clang command line")
      Link: http://lkml.kernel.org/r/20180731073254.91090-1-tmricht@linux.ibm.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      83868bf7
    • Jiri Olsa's avatar
      perf c2c report: Fix crash for empty browser · 73978332
      Jiri Olsa authored
      'perf c2c' scans read/write accesses and tries to find false sharing
      cases, so when the events it wants were not asked for or ended up not
      taking place, we get no histograms.
      
      So do not try to display entry details if there's not any. Currently
      this ends up in crash:
      
        $ perf c2c report # then press 'd'
        perf: Segmentation fault
        $
      
      Committer testing:
      
      Before:
      
      Record a perf.data file without events of interest to 'perf c2c report',
      then call it and press 'd':
      
        # perf record sleep 1
        [ perf record: Woken up 1 times to write data ]
        [ perf record: Captured and wrote 0.001 MB perf.data (6 samples) ]
        # perf c2c report
        perf: Segmentation fault
        -------- backtrace --------
        perf[0x5b1d2a]
        /lib64/libc.so.6(+0x346df)[0x7fcb566e36df]
        perf[0x46fcae]
        perf[0x4a9f1e]
        perf[0x4aa220]
        perf(main+0x301)[0x42c561]
        /lib64/libc.so.6(__libc_start_main+0xe9)[0x7fcb566cff29]
        perf(_start+0x29)[0x42c999]
        #
      
      After the patch the segfault doesn't take place, a follow up patch to
      tell the user why nothing changes when 'd' is pressed would be good.
      
      Reported-by: rodia@autistici.org
      Signed-off-by: default avatarJiri Olsa <jolsa@kernel.org>
      Tested-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
      Cc: David Ahern <dsahern@gmail.com>
      Cc: Don Zickus <dzickus@redhat.com>
      Cc: Joe Mario <jmario@redhat.com>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Fixes: f1c5fd4d ("perf c2c report: Add TUI cacheline browser")
      Link: http://lkml.kernel.org/r/20180724062008.26126-1-jolsa@kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      73978332
    • Sandipan Das's avatar
      perf tests: Fix indexing when invoking subtests · aa90f9f9
      Sandipan Das authored
      Recently, the subtest numbering was changed to start from 1.  While it
      is fine for displaying results, this should not be the case when the
      subtests are actually invoked.
      
      Typically, the subtests are stored in zero-indexed arrays and invoked
      based on the index passed to the main test function.  Since the index
      now starts from 1, the second subtest in the array (index 1) gets
      invoked instead of the first (index 0).  This applies to all of the
      following subtests but for the last one, the subtest always fails
      because it does not meet the boundary condition of the subtest index
      being lesser than the number of subtests.
      
      This can be observed on powerpc64 and x86_64 systems running Fedora 28
      as shown below.
      
      Before:
      
        # perf test "builtin clang support"
        55: builtin clang support                                 :
        55.1: builtin clang compile C source to IR                : Ok
        55.2: builtin clang compile C source to ELF object        : FAILED!
      
        # perf test "LLVM search and compile"
        38: LLVM search and compile                               :
        38.1: Basic BPF llvm compile                              : Ok
        38.2: kbuild searching                                    : Ok
        38.3: Compile source for BPF prologue generation          : Ok
        38.4: Compile source for BPF relocation                   : FAILED!
      
        # perf test "BPF filter"
        40: BPF filter                                            :
        40.1: Basic BPF filtering                                 : Ok
        40.2: BPF pinning                                         : Ok
        40.3: BPF prologue generation                             : Ok
        40.4: BPF relocation checker                              : FAILED!
      
      After:
      
        # perf test "builtin clang support"
        55: builtin clang support                                 :
        55.1: builtin clang compile C source to IR                : Ok
        55.2: builtin clang compile C source to ELF object        : Ok
      
        # perf test "LLVM search and compile"
        38: LLVM search and compile                               :
        38.1: Basic BPF llvm compile                              : Ok
        38.2: kbuild searching                                    : Ok
        38.3: Compile source for BPF prologue generation          : Ok
        38.4: Compile source for BPF relocation                   : Ok
      
        # perf test "BPF filter"
        40: BPF filter                                            :
        40.1: Basic BPF filtering                                 : Ok
        40.2: BPF pinning                                         : Ok
        40.3: BPF prologue generation                             : Ok
        40.4: BPF relocation checker                              : Ok
      Signed-off-by: default avatarSandipan Das <sandipan@linux.ibm.com>
      Reported-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      Tested-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
      Cc: Hendrik Brueckner <brueckner@linux.ibm.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
      Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
      Cc: Thomas Richter <tmricht@linux.ibm.com>
      Fixes: 9ef01124 ("perf test: Fix subtest number when showing results")
      Link: http://lkml.kernel.org/r/20180726171733.33208-1-sandipan@linux.ibm.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      aa90f9f9
    • Arnaldo Carvalho de Melo's avatar
      perf trace: Beautify the AF_INET & AF_INET6 'socket' syscall 'protocol' args · 162d3edb
      Arnaldo Carvalho de Melo authored
      For instance:
      
        $ trace -e socket* ssh sandy
           0.000 ( 0.031 ms): ssh/19919 socket(family: LOCAL, type: STREAM|CLOEXEC|NONBLOCK                   ) = 3
           0.052 ( 0.015 ms): ssh/19919 socket(family: LOCAL, type: STREAM|CLOEXEC|NONBLOCK                   ) = 3
           1.568 ( 0.020 ms): ssh/19919 socket(family: LOCAL, type: STREAM|CLOEXEC|NONBLOCK                   ) = 3
           1.603 ( 0.012 ms): ssh/19919 socket(family: LOCAL, type: STREAM|CLOEXEC|NONBLOCK                   ) = 3
           1.699 ( 0.014 ms): ssh/19919 socket(family: LOCAL, type: STREAM|CLOEXEC|NONBLOCK                   ) = 3
           1.724 ( 0.012 ms): ssh/19919 socket(family: LOCAL, type: STREAM|CLOEXEC|NONBLOCK                   ) = 3
           1.804 ( 0.020 ms): ssh/19919 socket(family: INET, type: STREAM, protocol: TCP                      ) = 3
          17.549 ( 0.098 ms): ssh/19919 socket(family: LOCAL, type: STREAM                                    ) = 4
        acme@sandy's password:
      
      Just like with other syscall args, the common bits are supressed so that
      the output is more compact, i.e. we use "TCP" instead of "IPPROTO_TCP",
      but we can make this show the original constant names if we like it by
      using some command line knob or ~/.perfconfig "[trace]" section
      variable.
      
      Also needed is to make perf's event parser accept things like:
      
        $ perf trace -e socket*/protocol=TCP/
      
      By using both the tracefs event 'format' files and these tables built
      from the kernel sources.
      
      Cc: Adrian Hunter <adrian.hunter@intel.com>
      Cc: David Ahern <dsahern@gmail.com>
      Cc: Jiri Olsa <jolsa@kernel.org>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Cc: Wang Nan <wangnan0@huawei.com>
      Link: https://lkml.kernel.org/n/tip-l39jz1vnyda0b6jsufuc8bz7@git.kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      162d3edb
    • Arnaldo Carvalho de Melo's avatar
      perf trace beauty: Add beautifiers for 'socket''s 'protocol' arg · 03aeb6c8
      Arnaldo Carvalho de Melo authored
      It'll be wired to 'perf trace' in the next cset.
      
      Cc: Adrian Hunter <adrian.hunter@intel.com>
      Cc: David Ahern <dsahern@gmail.com>
      Cc: Jiri Olsa <jolsa@kernel.org>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Cc: Wang Nan <wangnan0@huawei.com>
      Link: https://lkml.kernel.org/n/tip-2i9vkvm1ik8yu4hgjmxhsyjv@git.kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      03aeb6c8
    • Arnaldo Carvalho de Melo's avatar
      perf trace beauty: Do not print NULL strarray entries · bc972ada
      Arnaldo Carvalho de Melo authored
      We may have string tables where not all slots have values, in those
      cases its better to print the numeric value, for instance:
      
      In the table below we would show "protocol: (null)" for
      
            socket_ipproto[3]
      
      Where it would be better to show "protocol: 3".
      
            $ tools/perf/trace/beauty/socket_ipproto.sh
            static const char *socket_ipproto[] = {
                  [0] = "IP",
                  [103] = "PIM",
                  [108] = "COMP",
                  [12] = "PUP",
                  [132] = "SCTP",
                  [136] = "UDPLITE",
                  [137] = "MPLS",
                  [17] = "UDP",
                  [1] = "ICMP",
                  [22] = "IDP",
                  [255] = "RAW",
                  [29] = "TP",
                  [2] = "IGMP",
                  [33] = "DCCP",
                  [41] = "IPV6",
                  [46] = "RSVP",
                  [47] = "GRE",
                  [4] = "IPIP",
                  [50] = "ESP",
                  [51] = "AH",
                  [6] = "TCP",
                  [8] = "EGP",
                  [92] = "MTP",
                  [94] = "BEETPH",
                  [98] = "ENCAP",
            };
            $
      
      Cc: Adrian Hunter <adrian.hunter@intel.com>
      Cc: David Ahern <dsahern@gmail.com>
      Cc: Jiri Olsa <jolsa@kernel.org>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Cc: Wang Nan <wangnan0@huawei.com>
      Link: https://lkml.kernel.org/n/tip-7djfak94eb3b9ltr79cpn3ti@git.kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      bc972ada
    • Arnaldo Carvalho de Melo's avatar
      perf beauty: Add a generator for IPPROTO_ socket's protocol constants · 9849eec3
      Arnaldo Carvalho de Melo authored
      It'll use tools/include copy of linux/in.h to generate a table to be
      used by tools, initially by the 'socket' and 'socketpair' beautifiers in
      'perf trace', but that could also be used to translate from a string
      constant to the integer value to be used in a eBPF or tracefs tracepoint
      filter.
      
      When used without any args it produces:
      
        $ tools/perf/trace/beauty/socket_ipproto.sh
        static const char *socket_ipproto[] = {
      	[0] = "IP",
      	[103] = "PIM",
      	[108] = "COMP",
      	[12] = "PUP",
      	[132] = "SCTP",
      	[136] = "UDPLITE",
      	[137] = "MPLS",
      	[17] = "UDP",
      	[1] = "ICMP",
      	[22] = "IDP",
      	[255] = "RAW",
      	[29] = "TP",
      	[2] = "IGMP",
      	[33] = "DCCP",
      	[41] = "IPV6",
      	[46] = "RSVP",
      	[47] = "GRE",
      	[4] = "IPIP",
      	[50] = "ESP",
      	[51] = "AH",
      	[6] = "TCP",
      	[8] = "EGP",
      	[92] = "MTP",
      	[94] = "BEETPH",
      	[98] = "ENCAP",
        };
        $
      
      Cc: Adrian Hunter <adrian.hunter@intel.com>
      Cc: David Ahern <dsahern@gmail.com>
      Cc: Jiri Olsa <jolsa@kernel.org>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Cc: Wang Nan <wangnan0@huawei.com>
      Link: https://lkml.kernel.org/n/tip-v9rafqh3qn6b9kp9vfvj9f8s@git.kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      9849eec3
    • Arnaldo Carvalho de Melo's avatar
      tools include uapi: Grab a copy of linux/in.h · a4b20612
      Arnaldo Carvalho de Melo authored
      We'll use it to create tables for the 'protocol' argument to the
      socket syscall when the 'family' arg is one of AF_INET or AF_INET6.
      
      Add it to check_headers.sh so that when a new protocol gets added we get
      a notification during the build process.
      
      Cc: Adrian Hunter <adrian.hunter@intel.com>
      Cc: David Ahern <dsahern@gmail.com>
      Cc: Jiri Olsa <jolsa@kernel.org>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Cc: Wang Nan <wangnan0@huawei.com>
      Link: https://lkml.kernel.org/n/tip-2amnveu1ns4emjn70xuavpje@git.kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      a4b20612
    • Sandipan Das's avatar
      perf tests: Fix complex event name parsing · a6f39cec
      Sandipan Das authored
      The 'umask' event parameter is unsupported on some architectures like
      powerpc64.
      
      This can be observed on a powerpc64le system running Fedora 27 as shown
      below.
      
        # perf test "Parse event definition strings" -v
         6: Parse event definition strings                        :
        --- start ---
        test child forked, pid 45915
        ...
        running test 3 'cpu/name='COMPLEX_CYCLES_NAME:orig=cycles,desc=chip-clock-ticks',period=0x1,event=0x2,umask=0x3/ukp'Invalid event/parameter 'umask'
        Invalid event/parameter 'umask'
        failed to parse event 'cpu/name='COMPLEX_CYCLES_NAME:orig=cycles,desc=chip-clock-ticks',period=0x1,event=0x2,umask=0x3/ukp', err 1, str 'unknown term'
        event syntax error: '..,event=0x2,umask=0x3/ukp'
                                          \___ unknown term
      
        valid terms: event,mark,pmc,cache_sel,pmcxsel,unit,thresh_stop,thresh_start,combine,thresh_sel,thresh_cmp,sample_mode,config,config1,config2,name,period,freq,branch_type,time,call-graph,stack-size,no-inherit,inherit,max-stack,no-overwrite,overwrite,driver-config
      
        mem_access -> cpu/event=0x10401e0/
        running test 0 'config=10,config1,config2=3,umask=1'
        test child finished with 1
        ---- end ----
        Parse event definition strings: FAILED!
      
      Committer testing:
      
      After applying the patch these test passes and in verbose mode we get:
      
        # perf test -v "event definition"
         6: Parse event definition strings:
        --- start ---
        test child forked, pid 11061
        running test 0 'syscalls:sys_enter_openat'Using CPUID GenuineIntel-6-9E
        <SNIP>
        running test 53 'cycles/name='COMPLEX_CYCLES_NAME:orig=cycles,desc=chip-clock-ticks'/Duk'
        running test 0 'cpu/config=10,config1,config2=3,period=1000/u'
        running test 1 'cpu/config=1,name=krava/u,cpu/config=2/u'
        running test 2 'cpu/config=1,call-graph=fp,time,period=100000/,cpu/config=2,call-graph=no,time=0,period=2000/'
        running test 3 'cpu/name='COMPLEX_CYCLES_NAME:orig=cycles,desc=chip-clock-ticks',period=0x1,event=0x2/ukp'
        <SNIP>
        test child finished with 0
        ---- end ----
        Parse event definition strings: Ok
        #
      Suggested-by: default avatarRavi Bangoria <ravi.bangoria@linux.ibm.com>
      Signed-off-by: default avatarSandipan Das <sandipan@linux.ibm.com>
      Tested-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
      Fixes: 06dc5bf2 ("perf tests: Check that complex event name is parsed correctly")
      Link: http://lkml.kernel.org/r/20180726105502.31670-1-sandipan@linux.ibm.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      a6f39cec
    • Kan Liang's avatar
      perf evlist: Fix error out while applying initial delay and LBR · 95035c5e
      Kan Liang authored
      'perf record' will error out if both --delay and LBR are applied.
      
      For example:
      
        # perf record -D 1000 -a -e cycles -j any -- sleep 2
        Error:
        dummy:HG: PMU Hardware doesn't support sampling/overflow-interrupts.
        Try 'perf stat'
        #
      
      A dummy event is added implicitly for initial delay, which has the same
      configurations as real sampling events. The dummy event is a software
      event. If LBR is configured, perf must error out.
      
      The dummy event will only be used to track PERF_RECORD_MMAP while perf
      waits for the initial delay to enable the real events. The BRANCH_STACK
      bit can be safely cleared for the dummy event.
      
      After applying the patch:
      
        # perf record -D 1000 -a -e cycles -j any -- sleep 2
        [ perf record: Woken up 1 times to write data ]
        [ perf record: Captured and wrote 1.054 MB perf.data (828 samples) ]
        #
      Reported-by: default avatarSunil K Pandey <sunil.k.pandey@intel.com>
      Signed-off-by: default avatarKan Liang <kan.liang@linux.intel.com>
      Acked-by: default avatarJiri Olsa <jolsa@kernel.org>
      Tested-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Andi Kleen <ak@linux.intel.com>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Link: http://lkml.kernel.org/r/1531145722-16404-1-git-send-email-kan.liang@linux.intel.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      95035c5e
    • Arnaldo Carvalho de Melo's avatar
      perf trace beauty: Default header_dir to cwd to work without parms · 61b229ce
      Arnaldo Carvalho de Melo authored
      Useful when checking the effects of header synchs for the files it uses
      as a input to generate string tables, in retrospect this is how it
      should've been done from day 1, not requiring the header_dir to be set
      on the Makefile, will change everything later, so that the only parm,
      common to all generators will be $(srctree) and $(beauty_outdir).
      
      So, to see what it generates, just call it without any parameters:
      
        $ tools/perf/trace/beauty/vhost_virtio_ioctl.sh
        static const char *vhost_virtio_ioctl_cmds[] = {
      	[0x00] = "SET_FEATURES",
      	[0x01] = "SET_OWNER",
      	[0x02] = "RESET_OWNER",
      	[0x03] = "SET_MEM_TABLE",
      	[0x04] = "SET_LOG_BASE",
      	[0x07] = "SET_LOG_FD",
      	[0x10] = "SET_VRING_NUM",
      	[0x11] = "SET_VRING_ADDR",
      	[0x12] = "SET_VRING_BASE",
      	[0x13] = "SET_VRING_ENDIAN",
      	[0x14] = "GET_VRING_ENDIAN",
      	[0x20] = "SET_VRING_KICK",
      	[0x21] = "SET_VRING_CALL",
      	[0x22] = "SET_VRING_ERR",
      	[0x23] = "SET_VRING_BUSYLOOP_TIMEOUT",
      	[0x24] = "GET_VRING_BUSYLOOP_TIMEOUT",
      	[0x30] = "NET_SET_BACKEND",
      	[0x40] = "SCSI_SET_ENDPOINT",
      	[0x41] = "SCSI_CLEAR_ENDPOINT",
      	[0x42] = "SCSI_GET_ABI_VERSION",
      	[0x43] = "SCSI_SET_EVENTS_MISSED",
      	[0x44] = "SCSI_GET_EVENTS_MISSED",
      	[0x60] = "VSOCK_SET_GUEST_CID",
      	[0x61] = "VSOCK_SET_RUNNING",
        };
        static const char *vhost_virtio_ioctl_read_cmds[] = {
      	[0x00] = "GET_FEATURES",
      	[0x12] = "GET_VRING_BASE",
        };
        $
      
      Or:
      
        $ tools/perf/trace/beauty/sndrv_pcm_ioctl.sh
        static const char *sndrv_pcm_ioctl_cmds[] = {
      	[0x00] = "PVERSION",
      	[0x01] = "INFO",
      	[0x02] = "TSTAMP",
      	[0x03] = "TTSTAMP",
      	[0x04] = "USER_PVERSION",
      	[0x10] = "HW_REFINE",
      	[0x11] = "HW_PARAMS",
      	[0x12] = "HW_FREE",
      	[0x13] = "SW_PARAMS",
      	[0x20] = "STATUS",
      	[0x21] = "DELAY",
      	[0x22] = "HWSYNC",
      	[0x23] = "SYNC_PTR",
      	[0x24] = "STATUS_EXT",
      	[0x32] = "CHANNEL_INFO",
      	[0x40] = "PREPARE",
      	[0x41] = "RESET",
      	[0x42] = "START",
      	[0x43] = "DROP",
      	[0x44] = "DRAIN",
      	[0x45] = "PAUSE",
      	[0x46] = "REWIND",
      	[0x47] = "RESUME",
      	[0x48] = "XRUN",
      	[0x49] = "FORWARD",
      	[0x50] = "WRITEI_FRAMES",
      	[0x51] = "READI_FRAMES",
      	[0x52] = "WRITEN_FRAMES",
      	[0x53] = "READN_FRAMES",
      	[0x60] = "LINK",
      	[0x61] = "UNLINK",
        };
        $
      
      Etc.
      
      Cc: Adrian Hunter <adrian.hunter@intel.com>
      Cc: David Ahern <dsahern@gmail.com>
      Cc: Jiri Olsa <jolsa@kernel.org>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Cc: Wang Nan <wangnan0@huawei.com>
      Link: https://lkml.kernel.org/n/tip-90am4vm8hh1osms894dp2otr@git.kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      61b229ce
    • Arnaldo Carvalho de Melo's avatar
      c2586cfb
    • Ingo Molnar's avatar
      Merge tag 'perf-urgent-for-mingo-4.18-20180730' of... · ce03b6d2
      Ingo Molnar authored
      Merge tag 'perf-urgent-for-mingo-4.18-20180730' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent
      
      Pull perf/urgent fixes from Arnaldo Carvalho de Melo:
      
      - Update the tools copy of several files, including perf_event.h,
        powerpc's asm/unistd.h (new io_pgetevents syscall), bpf.h and
        x86's memcpy_64.s (used in 'perf bench mem'), silencing the
        respective warnings during the perf tools build.
      
      - Fix the build on the alpine:edge distro.
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
      ce03b6d2
    • Kan Liang's avatar
      perf/x86/intel/uncore: Fix hardcoded index of Broadwell extra PCI devices · 156c8b58
      Kan Liang authored
      Masayoshi Mizuma reported that a warning message is shown while a CPU is
      hot-removed on Broadwell servers:
      
        WARNING: CPU: 126 PID: 6 at arch/x86/events/intel/uncore.c:988
        uncore_pci_remove+0x10b/0x150
        Call Trace:
         pci_device_remove+0x42/0xd0
         device_release_driver_internal+0x148/0x220
         pci_stop_bus_device+0x76/0xa0
         pci_stop_root_bus+0x44/0x60
         acpi_pci_root_remove+0x1f/0x80
         acpi_bus_trim+0x57/0x90
         acpi_bus_trim+0x2e/0x90
         acpi_device_hotplug+0x2bc/0x4b0
         acpi_hotplug_work_fn+0x1a/0x30
         process_one_work+0x174/0x3a0
         worker_thread+0x4c/0x3d0
         kthread+0xf8/0x130
      
      This bug was introduced by:
      
        commit 15a3e845 ("perf/x86/intel/uncore: Fix SBOX support for Broadwell CPUs")
      
      The index of "QPI Port 2 filter" was hardcode to 2, but this conflicts with the
      index of "PCU.3" which is "HSWEP_PCI_PCU_3", which equals to 2 as well.
      
      To fix the conflict, the hardcoded index needs to be cleaned up:
      
       - introduce a new enumerator "BDX_PCI_QPI_PORT2_FILTER" for "QPI Port 2
         filter" on Broadwell,
       - increase UNCORE_EXTRA_PCI_DEV_MAX by one,
       - clean up the hardcoded index.
      Debugged-by: default avatarMasayoshi Mizuma <m.mizuma@jp.fujitsu.com>
      Suggested-by: default avatarIngo Molnar <mingo@kernel.org>
      Reported-by: default avatarMasayoshi Mizuma <m.mizuma@jp.fujitsu.com>
      Tested-by: default avatarMasayoshi Mizuma <m.mizuma@jp.fujitsu.com>
      Signed-off-by: default avatarKan Liang <kan.liang@linux.intel.com>
      Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Vince Weaver <vincent.weaver@maine.edu>
      Cc: msys.mizuma@gmail.com
      Cc: stable@vger.kernel.org
      Fixes: 15a3e845 ("perf/x86/intel/uncore: Fix SBOX support for Broadwell CPUs")
      Link: http://lkml.kernel.org/r/1532953688-15008-1-git-send-email-kan.liang@linux.intel.comSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
      156c8b58
  2. 30 Jul, 2018 10 commits
  3. 29 Jul, 2018 5 commits
    • Linus Torvalds's avatar
      Linux 4.18-rc7 · acb18725
      Linus Torvalds authored
      acb18725
    • Linus Torvalds's avatar
      Merge tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 · 3cfb6772
      Linus Torvalds authored
      Pull ext4 fixes from Ted Ts'o:
       "Some miscellaneous ext4 fixes for 4.18; one fix is for a regression
        introduced in 4.18-rc4.
      
        Sorry for the late-breaking pull. I was originally going to wait for
        the next merge window, but Eric Whitney found a regression introduced
        in 4.18-rc4, so I decided to push out the regression plus the other
        fixes now. (The other commits have been baking in linux-next since
        early July)"
      
      * tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
        ext4: fix check to prevent initializing reserved inodes
        ext4: check for allocation block validity with block group locked
        ext4: fix inline data updates with checksums enabled
        ext4: clear mmp sequence number when remounting read-only
        ext4: fix false negatives *and* false positives in ext4_check_descriptors()
      3cfb6772
    • Linus Torvalds's avatar
      squashfs: be more careful about metadata corruption · 01cfb793
      Linus Torvalds authored
      Anatoly Trosinenko reports that a corrupted squashfs image can cause a
      kernel oops.  It turns out that squashfs can end up being confused about
      negative fragment lengths.
      
      The regular squashfs_read_data() does check for negative lengths, but
      squashfs_read_metadata() did not, and the fragment size code just
      blindly trusted the on-disk value.  Fix both the fragment parsing and
      the metadata reading code.
      Reported-by: default avatarAnatoly Trosinenko <anatoly.trosinenko@gmail.com>
      Cc: Al Viro <viro@zeniv.linux.org.uk>
      Cc: Phillip Lougher <phillip@squashfs.org.uk>
      Cc: stable@kernel.org
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      01cfb793
    • Theodore Ts'o's avatar
      ext4: fix check to prevent initializing reserved inodes · 50122847
      Theodore Ts'o authored
      Commit 8844618d: "ext4: only look at the bg_flags field if it is
      valid" will complain if block group zero does not have the
      EXT4_BG_INODE_ZEROED flag set.  Unfortunately, this is not correct,
      since a freshly created file system has this flag cleared.  It gets
      almost immediately after the file system is mounted read-write --- but
      the following somewhat unlikely sequence will end up triggering a
      false positive report of a corrupted file system:
      
         mkfs.ext4 /dev/vdc
         mount -o ro /dev/vdc /vdc
         mount -o remount,rw /dev/vdc
      
      Instead, when initializing the inode table for block group zero, test
      to make sure that itable_unused count is not too large, since that is
      the case that will result in some or all of the reserved inodes
      getting cleared.
      
      This fixes the failures reported by Eric Whiteney when running
      generic/230 and generic/231 in the the nojournal test case.
      
      Fixes: 8844618d ("ext4: only look at the bg_flags field if it is valid")
      Reported-by: default avatarEric Whitney <enwlinux@gmail.com>
      Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      50122847
    • Linus Torvalds's avatar
      Merge tag 'random_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random · a26fb01c
      Linus Torvalds authored
      Pull random fixes from Ted Ts'o:
       "In reaction to the fixes to address CVE-2018-1108, some Linux
        distributions that have certain systemd versions in some cases
        combined with patches to libcrypt for FIPS/FEDRAMP compliance, have
        led to boot-time stalls for some hardware.
      
        The reaction by some distros and Linux sysadmins has been to install
        packages that try to do complicated things with the CPU and hope that
        leads to randomness.
      
        To mitigate this, if RDRAND is available, mix it into entropy provided
        by userspace. It won't hurt, and it will probably help"
      
      * tag 'random_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random:
        random: mix rdrand with entropy sent in from userspace
      a26fb01c
  4. 28 Jul, 2018 3 commits
  5. 27 Jul, 2018 7 commits
    • Linus Torvalds's avatar
      Merge tag 'for-linus-20180727' of git://git.kernel.dk/linux-block · eb181a81
      Linus Torvalds authored
      Pull block fixes from Jens Axboe:
       "Bigger than usual at this time, mostly due to the O_DIRECT corruption
        issue and the fact that I was on vacation last week. This contains:
      
         - NVMe pull request with two fixes for the FC code, and two target
           fixes (Christoph)
      
         - a DIF bio reset iteration fix (Greg Edwards)
      
         - two nbd reply and requeue fixes (Josef)
      
         - SCSI timeout fixup (Keith)
      
         - a small series that fixes an issue with bio_iov_iter_get_pages(),
           which ended up causing corruption for larger sized O_DIRECT writes
           that ended up racing with buffered writes (Martin Wilck)"
      
      * tag 'for-linus-20180727' of git://git.kernel.dk/linux-block:
        block: reset bi_iter.bi_done after splitting bio
        block: bio_iov_iter_get_pages: pin more pages for multi-segment IOs
        blkdev: __blkdev_direct_IO_simple: fix leak in error case
        block: bio_iov_iter_get_pages: fix size of last iovec
        nvmet: only check for filebacking on -ENOTBLK
        nvmet: fixup crash on NULL device path
        scsi: set timed out out mq requests to complete
        blk-mq: export setting request completion state
        nvme: if_ready checks to fail io to deleting controller
        nvmet-fc: fix target sgl list on large transfers
        nbd: handle unexpected replies better
        nbd: don't requeue the same request twice.
      eb181a81
    • Linus Torvalds's avatar
      Merge branch 'akpm' (patches from Andrew) · 864af0d4
      Linus Torvalds authored
      Merge misc fixes from Andrew Morton:
       "11 fixes"
      
      * emailed patches from Andrew Morton <akpm@linux-foundation.org>:
        kvm, mm: account shadow page tables to kmemcg
        zswap: re-check zswap_is_full() after do zswap_shrink()
        include/linux/eventfd.h: include linux/errno.h
        mm: fix vma_is_anonymous() false-positives
        mm: use vma_init() to initialize VMAs on stack and data segments
        mm: introduce vma_init()
        mm: fix exports that inadvertently make put_page() EXPORT_SYMBOL_GPL
        ipc/sem.c: prevent queue.status tearing in semop
        mm: disallow mappings that conflict for devm_memremap_pages()
        kasan: only select SLUB_DEBUG with SYSFS=y
        delayacct: fix crash in delayacct_blkio_end() after delayacct init failure
      864af0d4
    • Linus Torvalds's avatar
      Merge tag 'pci-v4.18-fixes-4' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci · 1a3d8691
      Linus Torvalds authored
      Pull PCI fix from Bjorn Helgaas:
       "Fix a use-after-free error in fatal error recovery (Thomas Tai)"
      
      * tag 'pci-v4.18-fixes-4' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
        PCI/AER: Work around use-after-free in pcie_do_fatal_recovery()
      1a3d8691
    • Linus Torvalds's avatar
      Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux · 6284c99c
      Linus Torvalds authored
      Pull arm64 fixes from Will Deacon:
       "Inevitably, after saying that I hoped we would be done on the fixes
        front, a couple of issues have cropped up over the last week. Next
        time I'll stay schtum.
      
        We've fixed an over-eager BUILD_BUG_ON() which Arnd ran into with
        arndconfig, as well as ensuring that KPTI really is disabled on
        Thunder-X1, where the cure is worse than the disease (this regressed
        when we reworked the heterogeneous CPU feature checking).
      
        Summary:
      
         - Fix disabling of kpti on Thunder-X machines
      
         - Fix premature BUILD_BUG_ON() found with randconfig"
      
      * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
        arm64: fix vmemmap BUILD_BUG_ON() triggering on !vmemmap setups
        arm64: Check for errata before evaluating cpu features
      6284c99c
    • Rafał Miłecki's avatar
      Revert "MIPS: BCM47XX: Enable 74K Core ExternalSync for PCIe erratum" · d5ea019f
      Rafał Miłecki authored
      This reverts commit 2a027b47 ("MIPS: BCM47XX: Enable 74K Core
      ExternalSync for PCIe erratum").
      
      Enabling ExternalSync caused a regression for BCM4718A1 (used e.g. in
      Netgear E3000 and ASUS RT-N16): it simply hangs during PCIe
      initialization. It's likely that BCM4717A1 is also affected.
      
      I didn't notice that earlier as the only BCM47XX devices with PCIe I
      own are:
      1) BCM4706 with 2 x 14e4:4331
      2) BCM4706 with 14e4:4360 and 14e4:4331
      it appears that BCM4706 is unaffected.
      
      While BCM5300X-ES300-RDS.pdf seems to document that erratum and its
      workarounds (according to quotes provided by Tokunori) it seems not even
      Broadcom follows them.
      
      According to the provided info Broadcom should define CONF7_ES in their
      SDK's mipsinc.h and implement workaround in the si_mips_init(). Checking
      both didn't reveal such code. It *could* mean Broadcom also had some
      problems with the given workaround.
      Signed-off-by: default avatarRafał Miłecki <rafal@milecki.pl>
      Signed-off-by: default avatarPaul Burton <paul.burton@mips.com>
      Reported-by: default avatarMichael Marley <michael@michaelmarley.com>
      Patchwork: https://patchwork.linux-mips.org/patch/20032/
      URL: https://bugs.openwrt.org/index.php?do=details&task_id=1688
      Cc: Tokunori Ikegami <ikegami@allied-telesis.co.jp>
      Cc: Hauke Mehrtens <hauke@hauke-m.de>
      Cc: Chris Packham <chris.packham@alliedtelesis.co.nz>
      Cc: James Hogan <jhogan@kernel.org>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: linux-mips@linux-mips.org
      d5ea019f
    • Linus Torvalds's avatar
      Merge tag 'drm-fixes-2018-07-27' of git://anongit.freedesktop.org/drm/drm · 3c9fdefe
      Linus Torvalds authored
      Pull drm fixes from Dave Airlie:
       "Not much happening this week which is good: two imx display fixes and
        one i915 quirk addition"
      
      * tag 'drm-fixes-2018-07-27' of git://anongit.freedesktop.org/drm/drm:
        drm/i915/glk: Add Quirk for GLK NUC HDMI port issues.
        gpu: ipu-csi: Check for field type alternate
        drm/imx: imx-ldb: check if channel is enabled before printing warning
        drm/imx: imx-ldb: disable LDB on driver bind
      3c9fdefe
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input · 49b1622b
      Linus Torvalds authored
      Pull input fixes from Dmitry Torokhov:
      
       - a couple of new device IDs added to Elan i2c touchpad controller
         driver
      
       - another entry in i8042 reset quirk list
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
        Input: i8042 - add Lenovo LaVie Z to the i8042 reset list
        Input: elan_i2c - add another ACPI ID for Lenovo Ideapad 330-15AST
        MAINTAINERS: Add file patterns for serio device tree bindings
        Input: elan_i2c - add ACPI ID for lenovo ideapad 330
      49b1622b