Files
s390-tools/cpumf
Thomas Richter d62e075450 cpumf/lshwc.c: Fix CPU list parameter setup for device driver
lshwc allows to specify a list of CPUs, for example

   # ./lshwc -a 2-3,66-68:b
   Date,Time,CPU,CPU_CYCLES(0),INSTRUCTIONS(1),L1I_DIR_WRITES(2),....
   2022-01-21,12:51:54,CPU2,68762,20999,283,14157,601,87255
   2022-01-21,12:51:54,CPU3,70514,21179,288,10654,586,90188
   2022-01-21,12:51:54,CPU4,48504,21018,141,7831,438,78494
   2022-01-21,12:51:54,Total,187780,63196,712,32642,1625,255937
   #

However, as seen on the output, the CPU list is incorrect. It shows
CPUs 2, 3 and 4 even when only CPU 2 and 3 was requested. CPUs 66, 67
and 68 have not been online and can not be displayed.

What happens is a wrong parameter conversion for the device driver.
CPUs 66, 67 and 68 are passed to the device driver as CPUs 2 3 and 4
and that data is returned.

Fix this and submit a CPU list with correct bit ordering:

   # ./lshwc -a 2-3,66-68:b
   Date,Time,CPU,CPU_CYCLES(0),INSTRUCTIONS(1),L1I_DIR_WRITES(2),...
   2022-01-21,12:59:18,CPU2,50753,18042,246,10972,494,60345
   2022-01-21,12:59:18,CPU3,54002,20390,232,9219,511,66033
   2022-01-21,12:59:18,Total,104755,38432,478,20191,1005,126378
   #

Reported-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Acked-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
2022-02-02 11:54:30 +01:00
..
2021-07-05 13:57:06 +02:00