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Posted to dev@brpc.apache.org by GitBox <gi...@apache.org> on 2020/11/25 10:29:56 UTC
[GitHub] [incubator-brpc] yushcs opened a new issue #1294: brpc调用openmp时cpu消耗不受控制
yushcs opened a new issue #1294:
URL: https://github.com/apache/incubator-brpc/issues/1294
在brpc服务中调用openmp进行矩阵运算，在设置了环境变量`OMP_NUM_THREADS和OMP_DYNAMIC="FALSE"`后，cpu消耗依旧不受控制。
例：`OMP_NUM_THREADS=4 OMP_DYNAMIC="FALSE"`；单个client请求的情况下，cpu消耗达到在600%-1000%之间波动；多个client并发的情况下，cpu消耗更加不可控。
已验证使用pthread对上述openmp的计算模块进行多线程调用时cpu消耗正常；已验证在brpc服务中去除openmp的相关模块后正常。
请问上述情况和bthread有没有关系？或者有什么排查方向吗？非常感谢！
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[GitHub] [incubator-brpc] yushcs commented on issue #1294: brpc调用openmp时cpu消耗不受控制
Posted by GitBox <gi...@apache.org>.
yushcs commented on issue #1294:
URL: https://github.com/apache/incubator-brpc/issues/1294#issuecomment-733649814
cpu消耗是在bvar的process_cpu_usage里看的，bthread_work_usage是0.95左右（单client请求的情况下）
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[GitHub] [incubator-brpc] cdjingit commented on issue #1294: brpc调用openmp时cpu消耗不受控制
Posted by GitBox <gi...@apache.org>.
cdjingit commented on issue #1294:
URL: https://github.com/apache/incubator-brpc/issues/1294#issuecomment-733641046
可能是有锁block bthread worker。你说的cpu消耗的值具体是哪里看的？top看的，还是bvar里面的cpu_usage? work_usage bvar是多少？
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[GitHub] [incubator-brpc] houjincheng1992 commented on issue #1294: brpc调用openmp时cpu消耗不受控制
Posted by GitBox <gi...@apache.org>.
houjincheng1992 commented on issue #1294:
URL: https://github.com/apache/incubator-brpc/issues/1294#issuecomment-914036934
这个有什么解法吗
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