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List:       linux-rt-users
Subject:    [PATCH 3/6] rteval: Exclude isolcpus from kcompile by default
From:       Tomas Glozar <tglozar () redhat ! com>
Date:       2023-06-30 9:19:04
Message-ID: 20230630091951.916865-4-tglozar () redhat ! com
[Download RAW message or body]

Allows correct calculation of make job count that does not include
isolated CPUs, on which the loads won't be scheduled.

Signed-off-by: Tomas Glozar <tglozar@redhat.com>
---
 rteval/modules/loads/kcompile.py | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/rteval/modules/loads/kcompile.py b/rteval/modules/loads/kcompile.py
index 35ee5cb..30c5965 100644
--- a/rteval/modules/loads/kcompile.py
+++ b/rteval/modules/loads/kcompile.py
@@ -37,6 +37,7 @@ from rteval.systopology import CpuList, SysTopology
 
 expand_cpulist = CpuList.expand_cpulist
 compress_cpulist = CpuList.compress_cpulist
+nonisolated_cpulist = CpuList.nonisolated_cpulist
 
 DEFAULT_KERNEL_PREFIX = "linux-6.1"
 
@@ -55,17 +56,20 @@ class KBuildJob:
         if not os.path.isdir(self.objdir):
             os.mkdir(self.objdir)
 
+        # Exclude isolated CPUs if cpulist not set
+        cpus_available = len(nonisolated_cpulist(self.node.cpus.cpulist))
+
         if os.path.exists('/usr/bin/numactl') and not cpulist:
             # Use numactl
             self.binder = f'numactl --cpunodebind {int(self.node)}'
-            self.jobs = self.calc_jobs_per_cpu() * len(self.node)
+            self.jobs = self.calc_jobs_per_cpu() * cpus_available
         elif cpulist:
             # Use taskset
             self.jobs = self.calc_jobs_per_cpu() * len(cpulist)
             self.binder = f'taskset -c {compress_cpulist(cpulist)}'
         else:
             # Without numactl calculate number of jobs from the node
-            self.jobs = self.calc_jobs_per_cpu() * len(self.node)
+            self.jobs = self.calc_jobs_per_cpu() * cpus_available
 
         self.runcmd = f"make O={self.objdir} -C {self.kdir} -j{self.jobs}"
         self.cleancmd = f"make O={self.objdir} -C {self.kdir} clean allmodconfig"
-- 
2.41.0

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