Date: Wed, 25 Dec 1996 14:45:07 -0400 (AST) From: "J.M. Chuang" <smp@bluenose.na.tuns.ca> To: smp@freebsd.org Subject: No More Trap 12 (was-> I think we have the culprit!!) Message-ID: <199612251845.OAA21895@bluenose.na.tuns.ca>
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Hi,
After changing only one line in pmap.c as follows:
...
...
if (cpu_feature & CPUID_PGE)
pgeflag = PG_G; ---> pgeflag = 0;
else
pgeflag = 0;
...
...
The current smp-kernel+APIC_IO+SMP_INVLTLB seems solid enough for
Dual Pentium Pro to compile kernel without trap 12.
Some results of `make -jx' for compiling a kernel are included below.
Any theory for it?
Jim
------------------------------------------------------------------
make -j 1
268.66 real 110.34 user 93.47 sys
3512 maximum resident set size
187 average shared memory size
275 average unshared data size
35 average unshared stack size
173362 page reclaims
7 page faults
0 swaps
71 block input operations
6121 block output operations
0 messages sent
0 messages received
0 signals received
5611 voluntary context switches
7695 involuntary context switches
-------------------------------------------------
make -j 2
203.48 real 144.54 user 75.44 sys
3512 maximum resident set size
335 average shared memory size
473 average unshared data size
57 average unshared stack size
178505 page reclaims
18 page faults
0 swaps
87 block input operations
7322 block output operations
0 messages sent
0 messages received
0 signals received
8266 voluntary context switches
7893 involuntary context switches
--------------------------------------------------
make -j 4
159.90 real 160.57 user 72.32 sys
3512 maximum resident set size
366 average shared memory size
508 average unshared data size
63 average unshared stack size
178681 page reclaims
0 page faults
0 swaps
71 block input operations
7135 block output operations
0 messages sent
0 messages received
0 signals received
8676 voluntary context switches
9372 involuntary context switches
--------------------------------------------------
make -j 6
155.47 real 167.11 user 72.79 sys
3512 maximum resident set size
358 average shared memory size
496 average unshared data size
63 average unshared stack size
178810 page reclaims
0 page faults
0 swaps
71 block input operations
7065 block output operations
0 messages sent
0 messages received
0 signals received
9357 voluntary context switches
12145 involuntary context switches
--------------------------------------------------
make -j 8
149.20 real 166.34 user 74.14 sys
3512 maximum resident set size
362 average shared memory size
500 average unshared data size
63 average unshared stack size
178894 page reclaims
0 page faults
0 swaps
71 block input operations
6966 block output operations
0 messages sent
0 messages received
0 signals received
9867 voluntary context switches
10648 involuntary context switches
--------------------------------------------------
make -j 10
153.76 real 172.27 user 73.22 sys
3512 maximum resident set size
362 average shared memory size
498 average unshared data size
63 average unshared stack size
178867 page reclaims
38 page faults
0 swaps
106 block input operations
6842 block output operations
0 messages sent
0 messages received
0 signals received
10202 voluntary context switches
12608 involuntary context switches
----------------------------------------------------
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