On 06/26/2013 02:03 PM, Raghavendra K T wrote:
On 06/24/2013 06:47 PM, Andrew Jones wrote:
On Mon, Jun 24, 2013 at 06:10:14PM +0530, Raghavendra K T wrote:
Results:
=======
base = 3.10-rc2 kernel
patched = base + this series
The test was on 32 core (model: Intel(R) Xeon(R) CPU X7560) HT disabled
with 32 KVM guest vcpu 8GB RAM.
Have you ever tried to get results with HT enabled?
+-----------+-----------+-----------+------------+-----------+
ebizzy (records/sec) higher is better
+-----------+-----------+-----------+------------+-----------+
base stdev patched stdev %improvement
+-----------+-----------+-----------+------------+-----------+
1x 5574.9000 237.4997 5618.0000 94.0366 0.77311
2x 2741.5000 561.3090 3332.0000 102.4738 21.53930
3x 2146.2500 216.7718 2302.3333 76.3870 7.27237
4x 1663.0000 141.9235 1753.7500 83.5220 5.45701
+-----------+-----------+-----------+------------+-----------+
This looks good. Are your ebizzy results consistent run to run
though?
+-----------+-----------+-----------+------------+-----------+
dbench (Throughput) higher is better
+-----------+-----------+-----------+------------+-----------+
base stdev patched stdev %improvement
+-----------+-----------+-----------+------------+-----------+
1x 14111.5600 754.4525 14645.9900 114.3087 3.78718
2x 2481.6270 71.2665 2667.1280 73.8193 7.47498
3x 1510.2483 31.8634 1503.8792 36.0777 -0.42173
4x 1029.4875 16.9166 1039.7069 43.8840 0.99267
+-----------+-----------+-----------+------------+-----------+
Hmm, I wonder what 2.5x looks like. Also, the 3% improvement with
no overcommit is interesting. What's happening there? It makes
me wonder what < 1x looks like.
Hi Andrew,
I tried 2.5x case sort where I used 3 guests with 27 vcpu each on 32
core (HT disabled machine) and here is the output. almost no gain there.
throughput avg stdev
base: 1768.7458 MB/sec 54.044221
patched: 1772.5617 MB/sec 41.227689
gain %0.226
I am yet to try HT enabled cases that would give 0.5x to 2x performance
results.
I have the result of HT enabled case now.
config: total 64 cpu (HT on) 32 vcpu guests.
I am seeing some inconsistency in ebizzy results in this case (May be
Drew had tried with HT on and had observed the same in ebizzy runs).
patched-nonple and base performance in case of 1.5x and 2x also have
been little inconsistent for dbench too. Overall I see pvspinlock + ple
on case more stable.
and overall pvspinlock performance seem to be very impressive in HT
enabled case.
patched = pvspinv10_hton
+-----------+-----------+-----------+------------+-----------+
ebizzy
+----+----------+-----------+-----------+------------+-----------+
base stdev patched stdev %improvement
+----+---------+-----------+-----------+------------+-----------+
0.5x 6925.3000 74.4342 7317.0000 86.3018 5.65607
1.0x 2379.8000 405.3519 3427.0000 574.8789 44.00370
1.5x 1850.8333 97.8114 2733.4167 459.8016 47.68573
2.0x 1477.6250 105.2411 2525.2500 97.5921 70.89925
+-----------+-----------+-----------+------------+-----------+
+-----------+-----------+-----------+------------+-----------+
dbench
+----+----------+-----------+-----------+------------+-----------+
base stdev patched stdev %improvement
+----+---------+-----------+-----------+------------+-----------+
0.5x 9045.9950 463.1447 16482.7200 57.6017 82.21014
1.0x 6251.1680 543.8219 11212.7600 380.7542 79.37064
1.5x 3095.7475 231.1567 4308.8583 266.5873 39.18636
2.0x 1219.1200 75.4294 1979.6750 134.6934 62.38557
+-----------+-----------+-----------+------------+-----------+
patched = pvspinv10_hton_nople
+-----------+-----------+-----------+------------+-----------+
ebizzy
+----+----------+-----------+-----------+------------+-----------+
base stdev patched stdev %improvement
+----+---------+-----------+-----------+------------+-----------+
0.5x 6925.3000 74.4342 7473.8000 224.6344 7.92023
1.0x 2379.8000 405.3519 6176.2000 417.1133 159.52601
1.5x 1850.8333 97.8114 2214.1667 515.6875 19.63080
2.0x 1477.6250 105.2411 758.0000 108.8131 -48.70146
+-----------+-----------+-----------+------------+-----------+
+-----------+-----------+-----------+------------+-----------+
dbench
+----+----------+-----------+-----------+------------+-----------+
base stdev patched stdev %improvement
+----+---------+-----------+-----------+------------+-----------+
0.5x 9045.9950 463.1447 15195.5000 711.8794 67.98042
1.0x 6251.1680 543.8219 11327.8800 404.7115 81.21222
1.5x 3095.7475 231.1567 4960.2722 3822.6534 60.22858
2.0x 1219.1200 75.4294 1982.2828 1016.4083 62.59948
+----+-----------+-----------+-----------+------------+-----------+
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