Messages in this thread | | | Date | Tue, 24 Apr 2001 07:44:45 +0200 (CEST) | From | Ingo Molnar <> | Subject | [patch] swap-speedup-2.4.3-B3 |
| |
the latest swap-speedup patch can be found at:
http://people.redhat.com/mingo/swap-speedup/swap-speedup-2.4.3-B3
(the patch is against 2.4.4-pre6 or 2.4.3-ac13.)
-B3 includes Marcelo's patch for another area that blocks unnecesserily on locked swapcache pages: async swapcache readahead. Marcello did some tests which shows that this fix brought some nice improvements too.
"make -j32 bzImage" using 128MB mem, 128MB swap, 4 CPUs:
stock 2.4.3-ac13 ---------------- real 4m0.678s user 4m2.870s sys 0m38.920s
swap-speedup-A2 --------------- real 3m24.190s user 4m1.070s sys 0m31.950s
swap-speedup-B3 (A2 + Marcelo's swapin-readahead non-blocking patch) --------------- real 3m7.410s user 4m0.940s sys 0m28.680s
ie. for this kernel compile test:
swap-speedup-A2 is a 18% speedup relative to stock 2.4.3-ac13 swap-speedup-B3 is a 28% speedup relative to stock 2.4.3-ac13
and the amount of CPU time spent in the kernel has been reduced significantly as well.
I believe all the correctness and SMP-locking issues have been taken care of in -B3 as well.
Ingo
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |