linux/tools/perf/tests/Build, branch v4.5

perf tools: Add event_update event unit type

2015-12-17T18:11:10Z

Adding unit type 'event update' event, that stores/transfer events unit name. The unit name is part of the perf stat output data. Signed-off-by: Jiri Olsa Tested-by: Kan Liang Cc: David Ahern Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1445784728-21732-22-git-send-email-jolsa@kernel.org [ Rename __alloc() to __new() for consistency ] Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Add stat config event synthesize function

2015-12-17T17:38:19Z

Introduce the perf_event__synthesize_stat_config to synthesize a 'struct perf_stat_config'. Storing the stat config in the form of tag-value pairs will, I believe, sort out future version extensibility issues. Signed-off-by: Jiri Olsa Tested-by: Kan Liang Cc: David Ahern Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1445784728-21732-13-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf cpu_map: Add cpu_map event synthesize function

2015-12-17T17:38:18Z

Introduce the perf_event__synthesize_cpu_map function to synthesize a struct cpu_map. Added generic interface: cpu_map_data__alloc cpu_map_data__synthesize to make the cpu_map synthesizing usable for other events. Signed-off-by: Jiri Olsa Tested-by: Kan Liang Cc: David Ahern Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1445784728-21732-9-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf test: Add Build file to dependencies for llvm-src-*.c

2015-12-14T15:17:09Z

Because the Build file writes source code to the generated llvm-src-*.c files, it should be listed as one of the dependencies, so that any future changes to the code being echoed won't require a 'make clean'. Signed-off-by: Josh Poimboeuf Acked-by: Jiri Olsa Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/9b9886c295750dc83cbbb29a665d280f9c5e8b3e.1449965119.git.jpoimboe@redhat.com Signed-off-by: Arnaldo Carvalho de Melo

perf test: Test the BPF prologue adding infrastructure

2015-11-18T20:51:04Z

This patch introduces a new BPF script to test the BPF prologue adding routines. The new script probes at null_lseek, which is the function pointer used when we try to lseek on '/dev/null'. The null_lseek function is chosen because it is used by function pointers, so we don't need to consider inlining and LTO. By extracting file->f_mode, bpf-script-test-prologue.c should know whether the file is writable or readonly. According to llseek_loop() and bpf-script-test-prologue.c, one fourth of total lseeks should be collected. Committer note: Testing it: # perf test -v BPF Kernel build dir is set to /lib/modules/4.3.0+/build set env: KBUILD_DIR=/lib/modules/4.3.0+/build unset env: KBUILD_OPTS include option is set to -nostdinc -isystem /usr/lib/gcc/x86_64-redhat-linux/4.9.2/include -I/home/git/linux/arch/x86/include -Iarch/x86/include/generated/uapi -Iarch/x86/include/generated -I/home/git/linux/include -Iinclude -I/home/git/linux/arch/x86/include/uapi -Iarch/x86/include/generated/uapi -I/home/git/linux/include/uapi -Iinclude/generated/uapi -include /home/git/linux/include/linux/kconfig.h set env: NR_CPUS=4 set env: LINUX_VERSION_CODE=0x40300 set env: CLANG_EXEC=/usr/libexec/icecc/bin/clang set env: CLANG_OPTIONS=-xc set env: KERNEL_INC_OPTIONS= -nostdinc -isystem /usr/lib/gcc/x86_64-redhat-linux/4.9.2/include -I/home/git/linux/arch/x86/include -Iarch/x86/include/generated/uapi -Iarch/x86/include/generated -I/home/git/linux/include -Iinclude -I/home/git/linux/arch/x86/include/uapi -Iarch/x86/include/generated/uapi -I/home/git/linux/include/uapi -Iinclude/generated/uapi -include /home/git/linux/include/linux/kconfig.h set env: WORKING_DIR=/lib/modules/4.3.0+/build set env: CLANG_SOURCE=- llvm compiling command template: echo '/* * bpf-script-test-prologue.c * Test BPF prologue */ #ifndef LINUX_VERSION_CODE # error Need LINUX_VERSION_CODE # error Example: for 4.2 kernel, put 'clang-opt="-DLINUX_VERSION_CODE=0x40200" into llvm section of ~/.perfconfig' #endif #define SEC(NAME) __attribute__((section(NAME), used)) #include #define FMODE_READ 0x1 #define FMODE_WRITE 0x2 static void (*bpf_trace_printk)(const char *fmt, int fmt_size, ...) = (void *) 6; SEC("func=null_lseek file->f_mode offset orig") int bpf_func__null_lseek(void *ctx, int err, unsigned long f_mode, unsigned long offset, unsigned long orig) { if (err) return 0; if (f_mode & FMODE_WRITE) return 0; if (offset & 1) return 0; if (orig == SEEK_CUR) return 0; return 1; } char _license[] SEC("license") = "GPL"; int _version SEC("version") = LINUX_VERSION_CODE; ' | $CLANG_EXEC -D__KERNEL__ -D__NR_CPUS__=$NR_CPUS -DLINUX_VERSION_CODE=$LINUX_VERSION_CODE $CLANG_OPTIONS $KERNEL_INC_OPTIONS -Wno-unused-value -Wno-pointer-sign -working-directory $WORKING_DIR -c "$CLANG_SOURCE" -target bpf -O2 -o - libbpf: loading object '[bpf_prologue_test]' from buffer libbpf: section .strtab, size 135, link 0, flags 0, type=3 libbpf: section .text, size 0, link 0, flags 6, type=1 libbpf: section .data, size 0, link 0, flags 3, type=1 libbpf: section .bss, size 0, link 0, flags 3, type=8 libbpf: section func=null_lseek file->f_mode offset orig, size 112, link 0, flags 6, type=1 libbpf: found program func=null_lseek file->f_mode offset orig libbpf: section license, size 4, link 0, flags 3, type=1 libbpf: license of [bpf_prologue_test] is GPL libbpf: section version, size 4, link 0, flags 3, type=1 libbpf: kernel version of [bpf_prologue_test] is 40300 libbpf: section .symtab, size 168, link 1, flags 0, type=2 bpf: config program 'func=null_lseek file->f_mode offset orig' symbol:null_lseek file:(null) line:0 offset:0 return:0 lazy:(null) parsing arg: file->f_mode into file, f_mode(1) parsing arg: offset into offset parsing arg: orig into orig bpf: config 'func=null_lseek file->f_mode offset orig' is ok Looking at the vmlinux_path (7 entries long) Using /lib/modules/4.3.0+/build/vmlinux for symbols Open Debuginfo file: /lib/modules/4.3.0+/build/vmlinux Try to find probe point from debuginfo. Matched function: null_lseek Probe point found: null_lseek+0 Searching 'file' variable in context. Converting variable file into trace event. converting f_mode in file f_mode type is unsigned int. Searching 'offset' variable in context. Converting variable offset into trace event. offset type is long long int. Searching 'orig' variable in context. Converting variable orig into trace event. orig type is int. Found 1 probe_trace_events. Opening /sys/kernel/debug/tracing//kprobe_events write=1 Writing event: p:perf_bpf_probe/func _text+4840528 f_mode=+68(%di):u32 offset=%si:s64 orig=%dx:s32 libbpf: don't need create maps for [bpf_prologue_test] prologue: pass validation prologue: slow path prologue: fetch arg 0, base reg is %di prologue: arg 0: offset 68 prologue: fetch arg 1, base reg is %si prologue: fetch arg 2, base reg is %dx add bpf event perf_bpf_probe:func and attach bpf program 3 adding perf_bpf_probe:func adding perf_bpf_probe:func to 0x51672c0 mmap size 1052672B Opening /sys/kernel/debug/tracing//kprobe_events write=1 Opening /sys/kernel/debug/tracing//uprobe_events write=1 Parsing probe_events: p:perf_bpf_probe/func _text+4840528 f_mode=+68(%di):u32 offset=%si:s64 orig=%dx:s32 Group:perf_bpf_probe Event:func probe:p Writing event: -:perf_bpf_probe/func test child finished with 0 ---- end ---- Test BPF filter: Ok # Signed-off-by: Wang Nan Tested-by: Arnaldo Carvalho de Melo Cc: Alexei Starovoitov Cc: Masami Hiramatsu Cc: Zefan Li Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1447675815-166222-13-git-send-email-wangnan0@huawei.com [ Added tools/perf/tests/llvm-src-prologue.c to .gitignore ] Signed-off-by: Arnaldo Carvalho de Melo

perf test: Add 'perf test BPF'

2015-11-06T20:50:03Z

This patch adds BPF testcase for testing BPF event filtering. By utilizing the result of 'perf test LLVM', this patch compiles the eBPF sample program then test its ability. The BPF script in 'perf test LLVM' lets only 50% samples generated by epoll_pwait() to be captured. This patch runs that system call for 111 times, so the result should contain 56 samples. Signed-off-by: Wang Nan Tested-by: Arnaldo Carvalho de Melo Cc: Alexei Starovoitov Cc: Jiri Olsa Cc: Namhyung Kim Cc: Zefan Li Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1446817783-86722-8-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo

perf test: Enhance the LLVM tests: add kbuild test

2015-11-06T20:49:50Z

This patch adds a kbuild testcase to check whether kernel headers can be correctly found. For example: # mv /lib/modules/4.3.0-rc5{,.bak} # perf test LLVM 38: Test LLVM searching and compiling : Skip # perf test -v LLVM ... :11:10: fatal error: 'uapi/linux/fs.h' file not found #include ^ 1 error generated. ERROR: unable to compile - Hint: Check error message shown above. Hint: You can also pre-compile it into .o using: clang -target bpf -O2 -c - with proper -I and -D options. Failed to compile test case: 'Test kbuild searching' test child finished with -2 Signed-off-by: Wang Nan Tested-by: Arnaldo Carvalho de Melo Cc: Jiri Olsa Cc: Namhyung Kim Cc: Zefan Li Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1446817783-86722-7-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo

perf test: Enhance the LLVM test: update basic BPF test program

2015-11-06T20:49:24Z

This patch replaces the original toy BPF program with the previously introduced bpf-script-example.c. Dynamically embeddeding it into 'llvm-src-base.c'. The newly introduced BPF program attaches a BPF program to 'sys_epoll_pwait()'. perf itself never use that syscall, so further test can verify their result with it. The program would generate 1 sample in every 2 calls of epoll_pwait() system call. Since the resulting BPF object is useful per se for further tests, test_llvm__fetch_bpf_obj() is introduced for creating BPF objects from source. The LLVM test was rewritten to use it. Committer note: Running it: [root@zoo wb]# perf test -v LLVM 35: Test LLVM searching and compiling : --- start --- test child forked, pid 17740 Kernel build dir is set to /lib/modules/4.3.0-rc1+/build set env: KBUILD_DIR=/lib/modules/4.3.0-rc1+/build unset env: KBUILD_OPTS include option is set to -nostdinc -isystem /usr/lib/gcc/x86_64-redhat-linux/4.9.2/include -I/home/git/linux/arch/x86/include -Iarch/x86/include/generated/uapi -Iarch/x86/include/generated -I/home/git/linux/include -Iinclude -I/home/git/linux/arch/x86/include/uapi -Iarch/x86/include/generated/uapi -I/home/git/linux/include/uapi -Iinclude/generated/uapi -include /home/git/linux/include/linux/kconfig.h set env: NR_CPUS=4 set env: LINUX_VERSION_CODE=0x40300 set env: CLANG_EXEC=/usr/libexec/icecc/bin/clang set env: CLANG_OPTIONS=-xc set env: KERNEL_INC_OPTIONS= -nostdinc -isystem /usr/lib/gcc/x86_64-redhat-linux/4.9.2/include -I/home/git/linux/arch/x86/include -Iarch/x86/include/generated/uapi -Iarch/x86/include/generated -I/home/git/linux/include -Iinclude -I/home/git/linux/arch/x86/include/uapi -Iarch/x86/include/generated/uapi -I/home/git/linux/include/uapi -Iinclude/generated/uapi -include /home/git/linux/include/linux/kconfig.h set env: WORKING_DIR=/lib/modules/4.3.0-rc1+/build set env: CLANG_SOURCE=- llvm compiling command template: echo '/* * bpf-script-example.c * Test basic LLVM building */ #ifndef LINUX_VERSION_CODE # error Need LINUX_VERSION_CODE # error Example: for 4.2 kernel, put 'clang-opt="-DLINUX_VERSION_CODE=0x40200" into llvm section of ~/.perfconfig' #endif #define BPF_ANY 0 #define BPF_MAP_TYPE_ARRAY 2 #define BPF_FUNC_map_lookup_elem 1 #define BPF_FUNC_map_update_elem 2 static void *(*bpf_map_lookup_elem)(void *map, void *key) = (void *) BPF_FUNC_map_lookup_elem; static void *(*bpf_map_update_elem)(void *map, void *key, void *value, int flags) = (void *) BPF_FUNC_map_update_elem; struct bpf_map_def { unsigned int type; unsigned int key_size; unsigned int value_size; unsigned int max_entries; }; #define SEC(NAME) __attribute__((section(NAME), used)) struct bpf_map_def SEC("maps") flip_table = { .type = BPF_MAP_TYPE_ARRAY, .key_size = sizeof(int), .value_size = sizeof(int), .max_entries = 1, }; SEC("func=sys_epoll_pwait") int bpf_func__sys_epoll_pwait(void *ctx) { int ind =0; int *flag = bpf_map_lookup_elem(&flip_table, &ind); int new_flag; if (!flag) return 0; /* flip flag and store back */ new_flag = !*flag; bpf_map_update_elem(&flip_table, &ind, &new_flag, BPF_ANY); return new_flag; } char _license[] SEC("license") = "GPL"; int _version SEC("version") = LINUX_VERSION_CODE; ' | $CLANG_EXEC -D__KERNEL__ -D__NR_CPUS__=$NR_CPUS -DLINUX_VERSION_CODE=$LINUX_VERSION_CODE $CLANG_OPTIONS $KERNEL_INC_OPTIONS -Wno-unused-value -Wno-pointer-sign -working-directory $WORKING_DIR -c "$CLANG_SOURCE" -target bpf -O2 -o - test child finished with 0 ---- end ---- Test LLVM searching and compiling: Ok [root@zoo wb]# Signed-off-by: Wang Nan Tested-by: Arnaldo Carvalho de Melo Cc: Jiri Olsa Cc: Namhyung Kim Cc: Zefan Li Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1446817783-86722-6-git-send-email-wangnan0@huawei.com Signed-off-by: He Kuang Signed-off-by: Arnaldo Carvalho de Melo

perf tests: Move x86 tests into arch directory

2015-10-05T19:55:43Z

Move out the x86-specific tests into tools/perf/arch/x86/tests and define an 'arch_tests' array, which is the list of tests that only apply to the build architecture. We can also now begin to get rid of some of the #ifdef code that is present in the generic perf tests. Signed-off-by: Matt Fleming Cc: Adrian Hunter Cc: Andi Kleen Cc: Fenghua Yu Cc: Jiri Olsa Cc: Kanaka Juvva Cc: Peter Zijlstra Cc: Vikas Shivappa Cc: Vince Weaver Link: http://lkml.kernel.org/n/tip-9s68h4ptg06ah0lgnjz55mqn@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf test: Add entry to test cpu topology

2015-09-14T15:50:17Z

This patch test cpu core_id and socket_id which are stored in perf_env. Commiter note: # perf test topo 40: Test topology in session: Ok # perf test -v topo 40: Test topology in session: --- start --- test child forked, pid 31767 templ file: /tmp/perf-test-VTZ1PL CPU 0, core 0, socket 0 CPU 1, core 1, socket 0 CPU 2, core 0, socket 0 CPU 3, core 1, socket 0 test child finished with 0 ---- end ---- Test topology in session: Ok # Based-on-a-patch-by: Jiri Olsa Signed-off-by: Kan Liang Tested-by: Arnaldo Carvalho de Melo Cc: Andi Kleen Cc: Jiri Olsa Link: http://lkml.kernel.org/r/1441357111-64522-1-git-send-email-kan.liang@intel.com Signed-off-by: Arnaldo Carvalho de Melo