Revision 5501e9229a80d95a1ea68609f44c447a75d23ed5 authored by Adrian Hunter on 07 January 2021, 17:41:59 UTC, committed by Arnaldo Carvalho de Melo on 15 January 2021, 20:28:27 UTC
In some cases, the number of cpus (nr_cpus_online) is confused with the
maximum cpu number (nr_cpus_avail), which results in the error in the
example below:
Example on system with 8 cpus:
Before:
# echo 0 > /sys/devices/system/cpu/cpu2/online
# ./perf record --kcore -e intel_pt// taskset --cpu-list 7 uname
Linux
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.147 MB perf.data ]
# ./perf script --itrace=e
Requested CPU 7 too large. Consider raising MAX_NR_CPUS
0x25908 [0x8]: failed to process type: 68 [Invalid argument]
After:
# ./perf script --itrace=e
#
Fixes: 8c7274691f0d ("perf machine: Replace MAX_NR_CPUS with perf_env::nr_cpus_online")
Fixes: 7df4e36a4785 ("perf session: Replace MAX_NR_CPUS with perf_env::nr_cpus_online")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Kan Liang <kan.liang@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: stable@vger.kernel.org
Link: http://lore.kernel.org/lkml/20210107174159.24897-1-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
1 parent a1bf230
| File | Mode | Size |
|---|---|---|
| Kconfig | -rw-r--r-- | 9.6 KB |
| Makefile | -rw-r--r-- | 735 bytes |
| acorn.c | -rw-r--r-- | 12.1 KB |
| aix.c | -rw-r--r-- | 6.4 KB |
| amiga.c | -rw-r--r-- | 3.6 KB |
| atari.c | -rw-r--r-- | 4.1 KB |
| atari.h | -rw-r--r-- | 1.0 KB |
| check.h | -rw-r--r-- | 2.1 KB |
| cmdline.c | -rw-r--r-- | 3.6 KB |
| core.c | -rw-r--r-- | 16.8 KB |
| efi.c | -rw-r--r-- | 22.7 KB |
| efi.h | -rw-r--r-- | 3.6 KB |
| ibm.c | -rw-r--r-- | 9.7 KB |
| karma.c | -rw-r--r-- | 1.1 KB |
| ldm.c | -rw-r--r-- | 42.1 KB |
| ldm.h | -rw-r--r-- | 4.6 KB |
| mac.c | -rw-r--r-- | 3.6 KB |
| mac.h | -rw-r--r-- | 1.2 KB |
| msdos.c | -rw-r--r-- | 21.3 KB |
| osf.c | -rw-r--r-- | 1.9 KB |
| sgi.c | -rw-r--r-- | 2.3 KB |
| sun.c | -rw-r--r-- | 3.9 KB |
| sysv68.c | -rw-r--r-- | 1.9 KB |
| ultrix.c | -rw-r--r-- | 1.2 KB |
Computing file changes ...
