perf test shell: Replace '|&' with '2>&1 |' to work with more shells
Since we do not specify bash (and/or zsh) as a requirement, use the
standard error redirection that is more widely supported.
BEFORE:
$ sudo perf test -v 62
62: Check open filename arg using perf trace + vfs_getname:
--- start ---
test child forked, pid 27305
./tests/shell/trace+probe_vfs_getname.sh: 20: ./tests/shell/trace+probe_vfs_getname.sh: Syntax error: "&" unexpected
test child finished with -2
---- end ----
Check open filename arg using perf trace + vfs_getname: Skip
AFTER:
$ sudo perf test -v 62
64: Check open filename arg using perf trace + vfs_getname :
--- start ---
test child forked, pid 23008
Added new event:
probe:vfs_getname (on getname_flags:72 with pathname=result->name:string)
You can now use it in all perf tools, such as:
perf record -e probe:vfs_getname -aR sleep 1
0.361 ( 0.008 ms): touch/23032 openat(dfd: CWD, filename: /tmp/temporary_file.VEh0n, flags: CREAT|NOCTTY|NONBLOCK|WRONLY, mode: IRUGO|IWUGO) = 4
test child finished with 0
---- end ----
Check open filename arg using perf trace + vfs_getname: Ok
Similar to commit 35435cd060
, with the same title.
Signed-off-by: Kim Phillips <kim.phillips@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sandipan Das <sandipan@linux.vnet.ibm.com>
Cc: Thomas Richter <tmricht@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/20180629124633.0a9f4bea54b8d2c28f265de2@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
parent
12aa6c7389
commit
508ef3e737
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@ -17,7 +17,7 @@ skip_if_no_perf_probe || exit 2
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file=$(mktemp /tmp/temporary_file.XXXXX)
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trace_open_vfs_getname() {
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evts=$(echo $(perf list syscalls:sys_enter_open* |& egrep 'open(at)? ' | sed -r 's/.*sys_enter_([a-z]+) +\[.*$/\1/') | sed 's/ /,/')
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evts=$(echo $(perf list syscalls:sys_enter_open* 2>&1 | egrep 'open(at)? ' | sed -r 's/.*sys_enter_([a-z]+) +\[.*$/\1/') | sed 's/ /,/')
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perf trace -e $evts touch $file 2>&1 | \
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egrep " +[0-9]+\.[0-9]+ +\( +[0-9]+\.[0-9]+ ms\): +touch\/[0-9]+ open(at)?\((dfd: +CWD, +)?filename: +${file}, +flags: CREAT\|NOCTTY\|NONBLOCK\|WRONLY, +mode: +IRUGO\|IWUGO\) += +[0-9]+$"
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}
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