This is v4 of the patch series to add physical CPU monitoring to xentop.
Changes since v3:
- Split the single large patch into a logical series of 3 smaller patches
for easier review.
- Fixed the memory allocation error handling in pcpu.c as pointed out by
Anthony PERARD. The realloc() result is now assigned immediately to avoid
invalid pointers on failure.
- Simplified the time calculation by using a single global timestamp instead
of a per-CPU array, as the time difference is the same for all cores.
- Removed the unnecessary check for small time intervals which could lead to
incorrect usage calculations.
- Integrated the PCPU display with the existing print() function to ensure
correct behavior in both interactive and batch modes.
The series adds a new '-p'/'--pcpus' flag to xentop. When enabled, it displays
a table showing the usage percentage of each physical CPU core in the system.
Jahan Murudi (4):
xentop: add pcpu header and basic infrastructure
xentop: add pcpu implementation with proper error handling
xentop: update Makefile to link against libxenctrl
xentop: integrate pcpu support into main program
tools/xentop/Makefile | 5 +-
tools/xentop/pcpu.c | 141 ++++++++++++++++++++++++++++++++++++++++++
tools/xentop/pcpu.h | 17 +++++
tools/xentop/xentop.c | 79 +++++++++++++++++------
4 files changed, 222 insertions(+), 20 deletions(-)
create mode 100644 tools/xentop/pcpu.c
create mode 100644 tools/xentop/pcpu.h
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2.34.1
