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[ACPI] Re: [PATCH] experimental WBINVD - C3 support for PIIX4
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From: Dominik B. <de...@br...> - 2002-03-20 09:56:41
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OK, here are additional statistics:
This test-run was similar to the first one, and so are the results. But check
the added statistics 2.1 and 2.2!
1.1) C3 policy:
---------------
Same C3 latency policy as in first test-run. Duration of wbinvd during boot:
276 us --> C3 latency 336 us.
1.2) C1, C2 and C3 utilization
------------------------------
C1: promotion[C2] demotion[--] latency[000] usage[00034574]
C2: promotion[C3] demotion[C1] latency[020] usage[00300435]
*C3: promotion[--] demotion[C2] latency[336] usage[00199172]
1.3) wbinvd duration
--------------------
minimum: 22 us
maximum: 795 us
average: 98 us
<100 us : 161 854 = 81.3 %
100 - 200 us : 36 676 = 18.4 %
200 - 300 us : 439 = 0.2 %
300 - 400 us : 175 = 0.1 %
400 - 500 us : 19 = 0.0 %
500 - 600 us : 6 = 0.0 %
600 - 700 us : 1 = 0.0 %
700 - 800 us : 1 = 0.0 %
>800 us : n e v e r
1.4) C3-duration:
minimum: 1 us
maximum: 9876 us
average: 7674 us
aborted due to Busmastering activity recognized only _after_
wbinvd-execution: 0 times
- 100us : 2.166 times = 1.1 %
100 us - 200us : 852 times = 0.4 %
200 us - 400us : 1.774 times = 0.9 %
400 us - 600us : 6.707 times = 3.4 %
600 us - 800us : 5.585 times = 2.8 %
800 us - 1.000us : 6.284 times = 3.1 %
1.000 us - 2.000us : 12.495 times = 6.3 %
2.000 us - 3.000us : 3.116 times = 1.6 %
3.000 us - 4.000us : 2.882 times = 1.4 %
4.000 us - 5.000us : 3.687 times = 1.9 %
5.000 us - 6.000us : 2.662 times = 1.3 %
6.000 us - 7.000us : 2.714 times = 1.4 %
7.000 us - 8.000us : 3.919 times = 2.0 %
8.000 us - 9.000us : 5.104 times = 2.6 %
9.000 us -10.000us : 139.260 times = 69.9 %
>=10.000us n e v e r
1.5) Matrix C3_support vs. WBINVD
---------------------------------
WBINVD:<100us <200us <300us
--------------------------------
C3_d:
<100us 0.7% 0.4%
<200us 0.3% 0.1%
<400us 0.6% 0.3%
<600us 3.0% 0.4%
<800us 2.5% 0.3%
<1ms 2.7% 0.4%
<2ms 5.3% 1.0%
<3ms 0.9% 0.6%
<4ms 0.8% 0.6%
<5ms 1.2% 0.6%
<6ms 0.6% 0.6% 0.1%
<7ms 0.5% 0.8%
<8ms 0.5% 1.5%
<9ms 0.5% 2.1%
<10ms 61.5% 8.7%
2.1 Duration of first WBINVD and first C3-sleep state after
promotion to C3
-------------------------------------------------------
WBINVD:
<100 us : 5 371 = 44.3 %
100 - 200 us : 6 482 = 53.4 %
200 - 300 us : 148 = 1.2 %
300 - 400 us : 113 = 0.9 %
400 - 500 us : 9 = 0.1 %
500 - 600 us : 4 = 0.0 %
600 - 700 us : 1 = 0.0 %
700 - 800 us : 1 = 0.0 %
>800 us : n e v e r
C3:
aborted due to Busmastering activity recognized only _after_
wbinvd-execution: 0 times
- 100us : 459 times = 3.8 %
100 us - 200us : 133 times = 1.1 %
200 us - 400us : 356 times = 2.9 %
400 us - 600us : 702 times = 5.8 %
600 us - 800us : 389 times = 3.2 %
800 us - 1.000us : 1.233 times = 10.2 %
1.000 us - 2.000us : 2.314 times = 19.1 %
2.000 us - 3.000us : 465 times = 3.8 %
3.000 us - 4.000us : 468 times = 3.9 %
4.000 us - 5.000us : 589 times = 4.9 %
5.000 us - 6.000us : 541 times = 4.5 %
6.000 us - 7.000us : 691 times = 5.7 %
7.000 us - 8.000us : 671 times = 5.5 %
8.000 us - 9.000us : 467 times = 3.8 %
9.000 us -10.000us : 2.652 times = 21.9 %
>=10.000us n e v e r
Matrix:
WBINVD:<100us <200us <300us <400us
----------------------------------------
C3_d:
<100us 1.2% 2.3% 0.1% 0.1%
<200us 0.3% 0.8%
<400us 0.8% 1.8% 0.2% 0.2%
<600us 2.0% 3.7% 0.1%
<800us 1.5% 1.6%
<1ms 5.6% 4.5% 0.1%
<2ms 11.9% 7.0% 0.1% 0.1%
<3ms 1.4% 2.3% 0.1%
<4ms 1.4% 2.3% 0.1% 0.1%
<5ms 2.1% 2.6% 0.1%
<6ms 1.6% 2.7% 0.1%
<7ms 1.5% 4.1% 0.1%
<8ms 1.5% 3.9%
<9ms 1.6% 2.2%
<10ms 9.9% 11.6% 0.2% 0.2%
2.2 number of C3s before C3 is demoted to C2:
0 : 16 = 0.1 % (aborted)
1 : 1.728 = 14.2 %
2 : 3.367 = 27.8 %
3 : 1.768 = 14.6 %
4 : 738 = 6.1 %
5 : 483 = 4.0 %
6-10 : 1.652 = 13.6 %
11-20 : 1.054 = 8.7 %
21-30 : 470 = 3.9 %
31-40 : 145 = 1.2 %
41-50 : 155 = 1.3 %
51-60 : 98 = 0.8 %
61-70 : 82 = 0.7 %
71-80 : 52 = 0.4 %
81-90 : 29 = 0.2 %
91-100: 30 = 0.2 %
-200: 149 = 1.2 %
>200: 127 = 1.0 %
-----------------------------------------------------------
So that looks promising, too... now if I knew what hangs my system when I use
either WBINVD or bus-mastering C3 - the system still works but both mouse and
keyboard have no influence on the system...
Dominik
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