kata-containers/s390-tools
1
0
Fork 0
mirror of https://github.com/ibm-s390-linux/s390-tools.git synced 2026-08-05 02:14:52 +00:00
Code Issues Packages Projects Releases Wiki Activity

hyptop/helper: fix smt utilization calculation

Browse Source 
When calculating smt utiliziation field, subresults are capped to a
minimum value of zero to prevent wrap around while converting values
from signed to unsigned integers. The capping of subresults cause slight
inaccuracies therefore capping has been moved from intermediate steps
and done at the end.

Fixes: 0209c11bc1 ("hyptop: Add real SMT utilization field")

Reviewed-by: Steffen Eiden <seiden@linux.ibm.com>
Signed-off-by: Mete Durlu <meted@linux.ibm.com>
Signed-off-by: Steffen Eiden <seiden@linux.ibm.com>
This commit is contained in:
Mete Durlu
2023-08-16 18:28:28 +02:00
committed by Steffen Eiden
parent dbea311aa8
commit 84738668ca
1 changed files with 3 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
hyptop/helper.c
View File

@@ -404,11 +404,11 @@ s64 ht_calculate_smt_util(u64 core_us, u64 thr_us, u64 mgm_us, int thread_per_co
s64 component1, component2, smt_us;
double smt_factor = g.o.smt_factor;
component1 = G0(thread_per_core * core_us - thr_us);
component1 = thread_per_core * core_us - thr_us;
if (thread_per_core > 1)
component1 /= smt_factor;
component2 = G0(thr_us - core_us);
smt_us = component1 + component2 + mgm_us;
component2 = thr_us - core_us;
smt_us = G0(component1 + component2 + mgm_us);
return smt_us;
}