RFR(X): Reduce region retirement during tlab allocation

[Roman Kennke]

Am 06.05.2017 um 00:26 schrieb Zhengyu Gu:
> I don't see any ping-pong effects. I do see some uneven TLAB sizes,
> which suggest that we actually pick up those, otherwise to be retired
> regions.
>
> 137.832s][debug][gc,alloc] Allocate new tlab, requested size = 524288
> bytes
> [137.833s][debug][gc,alloc] Allocate new tlab, requested size = 524288
> bytes
> [137.834s][debug][gc,alloc] Allocate new tlab, requested size = 524288
> bytes
> [137.838s][debug][gc,alloc] Allocate new tlab, requested size = 27704
> bytes
> [137.838s][debug][gc,alloc] Allocate new tlab, requested size = 373640
> bytes
> [137.926s][debug][gc,alloc] Allocate new tlab, requested size = 122944
> bytes
> [138.034s][debug][gc,alloc] Allocate new tlab, requested size = 524288
> bytes
> [138.041s][debug][gc,alloc] Allocate new tlab, requested size = 2656
> bytes
> [138.042s][debug][gc,alloc] Allocate new tlab, requested size = 521632
> bytes
> [138.090s][debug][gc,alloc] Allocate new tlab, requested size = 2688
> bytes
> [138.863s][debug][gc,alloc] Allocate new tlab, requested size = 521600
> bytes
> [138.863s][debug][gc,alloc] Allocate new tlab, requested size = 521600
> bytes
> [138.863s][debug][gc,alloc] Allocate new tlab, requested size = 521600
> bytes
> [138.863s][debug][gc,alloc] Allocate new tlab, requested size = 2688
> bytes
> [138.863s][debug][gc,alloc] Allocate new tlab, requested size = 521600
> bytes
> [138.863s][debug][gc,alloc] Allocate new tlab, requested size = 521600
> bytes
> [138.863s][debug][gc,alloc] Allocate new tlab, requested size = 2672
> bytes
> [138.863s][debug][gc,alloc] Allocate new tlab, requested size = 2696
> bytes
> [138.863s][debug][gc,alloc] Allocate new tlab, requested size = 2704
> bytes
> [138.863s][debug][gc,alloc] Allocate new tlab, requested size = 2712
> bytes
> [138.863s][debug][gc,alloc] Allocate new tlab, requested size = 3360
> bytes
>
>
> OK?

Ok!