Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.kernel > #1370560
| From | nad gam <nadavkernel@gmail.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | why cfs load balancer (3.14.1) doesnt pull tasks of busier run queue ? |
| Date | 2016-04-04 13:40 +0200 |
| Message-ID | <rkb1n-2kr-1@gated-at.bofh.it> (permalink) |
| Organization | linux.* mail to news gateway |
Im working with ubuntu with kernel 3.14.1 .The computer has intel's i7 processor - which has 4 hyper threaded cores - so in total 8 logical cores . I run processes that does sqrt in infinite loop - just to try and get cpu time - I create 15 for each logical core with set affinity syscall(15 attached to core 0, 15 to core 1 and so on..) When I disable one of the cores - for eg core 7, all of its process move to core 3 (which is the core other thread ..) and stay like that . So now there's imbalance as run queue 3 has almost double the load of any other cpu. The cpu_allowed of this process is changed to 11111111 - which mean they should be allowed to be scheduled to all cpus , but they just stick to cpu 3 , even though its load is twice as any other logical core . What could be the problem ? where in the kernel code should I look? Thanks !
Back to linux.kernel | Previous | Next | Find similar | Unroll thread
why cfs load balancer (3.14.1) doesnt pull tasks of busier run queue ? nad gam <nadavkernel@gmail.com> - 2016-04-04 13:40 +0200
csiph-web