Re: [PATCH v2] ksm: replace jhash2 with faster hash

2017-12-31 Thread kbuild test robot
Hi Timofey, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on mmotm/master] [also build test WARNING on v4.15-rc5 next-20171222] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-c

Re: [PATCH v2] ksm: replace jhash2 with faster hash

2017-12-30 Thread Timofey Titovets
Hi, I was send v5, with minor changes, but performance numbers are valid. 2017-12-31 3:07 GMT+03:00 sioh Lee : > hello > > First, thanks for organizing all the experiments. > > and i'm sending you the results of experiments > > Test platform: openstack cloud platform (NEWTON version) > Experiment

Re: [PATCH v2] ksm: replace jhash2 with faster hash

2017-12-30 Thread sioh Lee
hello First, thanks for organizing all the experiments. and i'm sending you the results of experiments Test platform: openstack cloud platform (NEWTON version) Experiment node: openstack based cloud compute node (CPU: xeon E5-2620 v3, memory 64gb) VM: (2 VCPU, RAM 4GB, DISK 20GB) * 4 Linux kern

Re: [PATCH v2] ksm: replace jhash2 with faster hash

2017-12-30 Thread Timofey Titovets
*FACEPALM*, Sorry, just forgot about numbering of old jhash2 -> xxhash conversion Also pickup patch for xxhash - arch dependent xxhash() function that will use fastest algo for current arch. So next will be v5, as that must be v4. Thanks. 2017-12-29 12:52 GMT+03:00 Timofey Titovets : > Pickup, S

[PATCH v2] ksm: replace jhash2 with faster hash

2017-12-29 Thread Timofey Titovets
Pickup, Sioh Lee crc32 patch, after some long conversation and hassles, merge with my work on xxhash, add choice fastest hash helper. Base idea are same, replace jhash2 with something faster. Perf numbers: Intel(R) Xeon(R) CPU E5-2420 v2 @ 2.20GHz ksm: crc32c hash() 12081 MB/s ksm: jhash2 has