On Sat, 5 Apr 2003, Bruce Evans wrote:
> Recent optimizations of context switching are large pessimizations
> according to lmbench2, at least in the default case (no LAZY_SWITCH).
The ifdefs are just so convoluted that they are broken in the
!LAZY_SWITCH case.
%%%
Index: swtch.s
===================================================================
RCS file: /home/ncvs/src/sys/i386/i386/swtch.s,v
retrieving revision 1.136
diff -u -2 -r1.136 swtch.s
--- swtch.s 2 Apr 2003 23:53:28 -0000 1.136
+++ swtch.s 5 Apr 2003 10:40:20 -0000
@@ -175,4 +175,5 @@
#endif
1:
+#endif
movl %cr3,%ebx /* The same address space? */
cmpl %ebx,%eax
@@ -182,6 +183,4 @@
je sw1
#endif
-#endif
-
#ifdef SWTCH_OPTIM_STATS
incl tlb_flush_count
%%%
Bruce
_______________________________________________
[EMAIL PROTECTED] mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-current
To unsubscribe, send any mail to "[EMAIL PROTECTED]"
