ceph.spec.in: increase the mem_per_job to 3GiB #41677
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to lower the number of jobs, we are experiencing build failures on a builder with 48c96t, 193 free mem. the failures were caused by OOM killer which kills the c++ compiler [498376.128969] oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=/,mems_allowed=0,global_oom,task_memcg=/system.slice/jenkins.service,task=cc1plus,pid=1387895,uid=1110 [498376.145288] Out of memory: Killed process 1387895 (cc1plus) total-vm:3323312kB, anon-rss:3164568kB, file-rss:0kB, shmem-rss:0kB, UID:1110 [498376.315185] oom_reaper: reaped process 1387895 (cc1plus), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB [498377.882072] cc1plus invoked oom-killer: gfp_mask=0x6200ca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_adj=0 before this change, we use the total memory to calculate the number of jobs, and assume that each job takes at most 2.5GiB mem. in the case above, the # of job is 96. after this change, we use the free memory, and increse the mem per job to 3.0GiB. in the case above, the # of job would be 85. Signed-off-by: Kefu Chai <kchai@redhat.com>
based on recent observation, quite a few C++ source file take
around more than 3.0GiB to compile. for instance,
test_mock_HttpClient.cc could take up to 6270MiB memory to compile.
so increase MAX_{LINK,COMPILE}_MEM accordingly.
Signed-off-by: Kefu Chai <kchai@redhat.com>
djgalloway
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Jun 3, 2021
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tchaikov
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Jun 4, 2021
see also ceph/ceph#41677 Signed-off-by: Kefu Chai <kchai@redhat.com>
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