kernel/tools/perf/builtin-daemon.c, branch linux-5.14.y

Merge remote-tracking branch 'torvalds/master' into perf/core

2021-03-29T13:39:10Z

To pick up fixes sent via perf/urgent and in the BPF tools/ directories. Signed-off-by: Arnaldo Carvalho de Melo

perf daemon: Remove duplicate includes

2021-03-25T12:58:08Z

sys/stat.h has been included at line 23, so remove the duplicate one at line 27. linux/string.h has been included at line 7, so remove the duplicate one at line 9. time.h has been included at line 14, so remove the duplicate one at line 28. Signed-off-by: Wan Jiabing Cc: Alexander Shishkin Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Cc: kael_w@yeah.net Link: http://lore.kernel.org/lkml/20210323050139.287461-1-wanjiabing@vivo.com Signed-off-by: Arnaldo Carvalho de Melo

perf daemon: Return from kill functions

2021-03-24T13:24:00Z

We should return correctly and warn in both daemon_session__kill() and daemon__kill() after we tried everything to kill sessions. The current code will keep on looping and waiting. Signed-off-by: Jiri Olsa Cc: Alexander Shishkin Cc: Ian Rogers Cc: Mark Rutland Cc: Michael Petlan Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lore.kernel.org/lkml/20210320221013.1619613-2-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf daemon: Force waipid for all session on SIGCHLD delivery

2021-03-24T13:23:15Z

If we don't process SIGCHLD before another comes, we will see just one SIGCHLD as a result. In this case current code will miss exit notification for a session and wait forever. Adding extra waitpid check for all sessions when SIGCHLD is received, to make sure we don't miss any session exit. Also fix close condition for signal_fd. Reported-by: Ian Rogers Signed-off-by: Jiri Olsa Cc: Alexander Shishkin Cc: Mark Rutland Cc: Michael Petlan Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lore.kernel.org/lkml/20210320221013.1619613-1-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf daemon: Fix compile error with Asan

2021-03-06T19:54:31Z

I'm seeing a build failure when build with address sanitizer. It seems we could write to the name[100] if the var is longer. $ make EXTRA_CFLAGS=-fsanitize=address ... CC builtin-daemon.o In function ‘get_session_name’, inlined from ‘session_config’ at builtin-daemon.c:164:6, inlined from ‘server_config’ at builtin-daemon.c:223:10: builtin-daemon.c:155:11: error: writing 1 byte into a region of size 0 [-Werror=stringop-overflow=] 155 | *session = 0; | ~~~~~~~~~^~~ builtin-daemon.c: In function ‘server_config’: builtin-daemon.c:162:7: note: at offset 100 to object ‘name’ with size 100 declared here 162 | char name[100]; | ^~~~ Fixes: c0666261ff38 ("perf daemon: Add config file support") Signed-off-by: Namhyung Kim Acked-by: Jiri Olsa Cc: Alexander Shishkin Cc: Ian Rogers Cc: Ingo Molnar Cc: Mark Rutland Cc: Peter Zijlstra Cc: Stephane Eranian Link: https://lore.kernel.org/r/20210224071438.686677-1-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf daemon: Fix control fifo permissions

2021-03-06T19:54:26Z

Add proper mode for mkfifo calls to get read and write permissions for user. We can't use O_RDWR in here, changing to standard permission value. Fixes: 6a6d1804a190 ("perf daemon: Set control fifo for session") Signed-off-by: Jiri Olsa Cc: Alexander Shishkin Cc: Ian Rogers Cc: John Garry Cc: Mark Rutland Cc: Michael Petlan Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lore.kernel.org/lkml/20210301122510.64402-1-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf daemon: Add up time for daemon/session list

2021-02-11T13:19:52Z

Display up time for both daemon and sessions. Example: # cat ~/.perfconfig [daemon] base=/opt/perfdata [session-cycles] run = -m 10M -e cycles --overwrite --switch-output -a [session-sched] run = -m 20M -e sched:* --overwrite --switch-output -a Starting the daemon: # perf daemon start Get the details with up time: # perf daemon -v [778315:daemon] base: /opt/perfdata output: /opt/perfdata/output lock: /opt/perfdata/lock up: 15 minutes [778316:cycles] perf record -m 20M -e cycles --overwrite --switch-output -a base: /opt/perfdata/session-cycles output: /opt/perfdata/session-cycles/output control: /opt/perfdata/session-cycles/control ack: /opt/perfdata/session-cycles/ack up: 10 minutes [778317:sched] perf record -m 20M -e sched:* --overwrite --switch-output -a base: /opt/perfdata/session-sched output: /opt/perfdata/session-sched/output control: /opt/perfdata/session-sched/control ack: /opt/perfdata/session-sched/ack up: 2 minutes Signed-off-by: Jiri Olsa Cc: Alexander Shishkin Cc: Alexei Budankov Cc: Ian Rogers Cc: Ingo Molnar Cc: Mark Rutland Cc: Michael Petlan Cc: Namhyung Kim Cc: Peter Zijlstra Link: https://lore.kernel.org/r/20210208200908.1019149-18-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf daemon: Use control to stop session

2021-02-11T13:19:52Z

Use the 'stop' control command to stop perf record session. If that fails, fall back to current SIGTERM/SIGKILL pair. Signed-off-by: Jiri Olsa Cc: Alexander Shishkin Cc: Alexei Budankov Cc: Ian Rogers Cc: Ingo Molnar Cc: Mark Rutland Cc: Michael Petlan Cc: Namhyung Kim Cc: Peter Zijlstra Link: https://lore.kernel.org/r/20210208200908.1019149-17-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf daemon: Add 'ping' command

2021-02-11T13:19:52Z

Add a 'ping' command to verify that the 'perf record' session is up and operational. It's used in the following patches via test code to make sure 'perf record' is ready to receive signals. Example: # cat ~/.perfconfig [daemon] base=/opt/perfdata [session-cycles] run = -m 10M -e cycles --overwrite --switch-output -a [session-sched] run = -m 20M -e sched:* --overwrite --switch-output -a Start the daemon: # perf daemon start Ping all sessions: # perf daemon ping OK cycles OK sched Ping specific session: # perf daemon ping --session sched OK sched Committer notes: Fixed up bug pointed by clang: Buggy: if (!pollfd.revents & POLLIN) Correct code: if (!(pollfd.revents & POLLIN)) clang warning: builtin-daemon.c:560:6: error: logical not is only applied to the left hand side of this bitwise operator [-Werror,-Wlogical-not-parentheses] if (!pollfd.revents & POLLIN) { ^ ~ builtin-daemon.c:560:6: note: add parentheses after the '!' to evaluate the bitwise operator first Also use designated initialized with pollfd, i.e.: struct pollfd pollfd = { .events = POLLIN, }; Instead of: struct pollfd pollfd = { 0, }; To get past: builtin-daemon.c:510:30: error: missing field 'events' initializer [-Werror,-Wmissing-field-initializers] struct pollfd pollfd = { 0, }; ^ 1 error generated. Signed-off-by: Jiri Olsa Cc: Alexander Shishkin Cc: Alexei Budankov Cc: Ian Rogers Cc: Ingo Molnar Cc: Mark Rutland Cc: Michael Petlan Cc: Namhyung Kim Cc: Peter Zijlstra Link: https://lore.kernel.org/r/20210208200908.1019149-16-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf daemon: Set control fifo for session

2021-02-11T13:19:52Z

Setup control fifos for session and add --control option to session arguments. Example: # cat ~/.perfconfig [daemon] base=/opt/perfdata [session-cycles] run = -m 10M -e cycles --overwrite --switch-output -a [session-sched] run = -m 20M -e sched:* --overwrite --switch-output -a Starting the daemon: # perf daemon start Use can list control fifos with (control and ack files): # perf daemon -v [776459:daemon] base: /opt/perfdata output: /opt/perfdata/output lock: /opt/perfdata/lock [776460:cycles] perf record -m 20M -e cycles --overwrite --switch-output -a base: /opt/perfdata/session-cycles output: /opt/perfdata/session-cycles/output control: /opt/perfdata/session-cycles/control ack: /opt/perfdata/session-cycles/ack [776461:sched] perf record -m 20M -e sched:* --overwrite --switch-output -a base: /opt/perfdata/session-sched output: /opt/perfdata/session-sched/output control: /opt/perfdata/session-sched/control ack: /opt/perfdata/session-sched/ack Signed-off-by: Jiri Olsa Cc: Alexander Shishkin Cc: Alexei Budankov Cc: Ian Rogers Cc: Ingo Molnar Cc: Mark Rutland Cc: Michael Petlan Cc: Namhyung Kim Cc: Peter Zijlstra Link: https://lore.kernel.org/r/20210208200908.1019149-15-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo