Re: [PATCH -mm] mm, huge page: Copy to access sub-page last when copy huge page

Mike Kravetz writes: > On 05/17/2018 11:24 PM, Michal Hocko wrote: >> On Fri 18-05-18 11:03:16, Huang, Ying wrote: >> [...] >>> The patch is a generic optimization which should benefit quite some >>> workloads, not for a specific use case. To demonstrate the performance

Re: [PATCH -mm] mm, huge page: Copy to access sub-page last when copy huge page

Mike Kravetz writes: > On 05/17/2018 11:24 PM, Michal Hocko wrote: >> On Fri 18-05-18 11:03:16, Huang, Ying wrote: >> [...] >>> The patch is a generic optimization which should benefit quite some >>> workloads, not for a specific use case. To demonstrate the performance >>> benefit of the

Re: [PATCH -mm] mm, huge page: Copy to access sub-page last when copy huge page

Hi, Michal, Michal Hocko writes: > On Fri 18-05-18 11:03:16, Huang, Ying wrote: > [...] >> The patch is a generic optimization which should benefit quite some >> workloads, not for a specific use case. To demonstrate the performance >> benefit of the patch, we tested it with

Re: [PATCH -mm] mm, huge page: Copy to access sub-page last when copy huge page

Hi, Michal, Michal Hocko writes: > On Fri 18-05-18 11:03:16, Huang, Ying wrote: > [...] >> The patch is a generic optimization which should benefit quite some >> workloads, not for a specific use case. To demonstrate the performance >> benefit of the patch, we tested it with vm-scalability run

Re: [PATCH -mm] mm, huge page: Copy to access sub-page last when copy huge page

On 05/17/2018 11:24 PM, Michal Hocko wrote: > On Fri 18-05-18 11:03:16, Huang, Ying wrote: > [...] >> The patch is a generic optimization which should benefit quite some >> workloads, not for a specific use case. To demonstrate the performance >> benefit of the patch, we tested it with

Re: [PATCH -mm] mm, huge page: Copy to access sub-page last when copy huge page

On 05/17/2018 11:24 PM, Michal Hocko wrote: > On Fri 18-05-18 11:03:16, Huang, Ying wrote: > [...] >> The patch is a generic optimization which should benefit quite some >> workloads, not for a specific use case. To demonstrate the performance >> benefit of the patch, we tested it with

Re: [PATCH -mm] mm, huge page: Copy to access sub-page last when copy huge page

On Fri 18-05-18 11:03:16, Huang, Ying wrote: [...] > The patch is a generic optimization which should benefit quite some > workloads, not for a specific use case. To demonstrate the performance > benefit of the patch, we tested it with vm-scalability run on > transparent huge page. It is also

Re: [PATCH -mm] mm, huge page: Copy to access sub-page last when copy huge page

On Fri 18-05-18 11:03:16, Huang, Ying wrote: [...] > The patch is a generic optimization which should benefit quite some > workloads, not for a specific use case. To demonstrate the performance > benefit of the patch, we tested it with vm-scalability run on > transparent huge page. It is also

[PATCH -mm] mm, huge page: Copy to access sub-page last when copy huge page

From: Huang Ying Huge page helps to reduce TLB miss rate, but it has higher cache footprint, sometimes this may cause some issue. For example, when copying huge page on x86_64 platform, the cache footprint is 4M. But on a Xeon E5 v3 2699 CPU, there are 18 cores, 36

[PATCH -mm] mm, huge page: Copy to access sub-page last when copy huge page

From: Huang Ying Huge page helps to reduce TLB miss rate, but it has higher cache footprint, sometimes this may cause some issue. For example, when copying huge page on x86_64 platform, the cache footprint is 4M. But on a Xeon E5 v3 2699 CPU, there are 18 cores, 36 threads, and only 45M LLC