On 01/05/15 08:39, Anton Khirnov wrote:
More specific benchmarks. As expected they aren't really different.
Performance counter stats for './avconv-v12_dev0-1273-g46914ff -nostats
-v quiet -filter_complex testsrc -t 600 -c:v mpeg2video -f null -' (30
runs):
18186.236693 task-clock (msec) # 1.271 CPUs
utilized ( +- 1.06% )
300332 context-switches # 0.017 M/sec
( +- 0.00% )
851 cpu-migrations # 0.047 K/sec
( +- 5.59% )
153625 page-faults # 0.008 M/sec
( +- 0.00% )
47684924907 cycles # 2.622 GHz
( +- 0.14% )
17169614279 stalled-cycles-frontend # 36.01% frontend
cycles idle ( +- 0.38% )
0 stalled-cycles-backend # 0.00% backend
cycles idle
103427443643 instructions # 2.17 insns per cycle
# 0.17 stalled
cycles per insn ( +- 0.00% )
9126880556 branches # 501.856 M/sec
( +- 0.00% )
113808703 branch-misses # 1.25% of all
branches ( +- 0.13% )
14.306429475 seconds time elapsed
( +- 1.11% )
Performance counter stats for './avconv-v12_dev0-1276-g9503449 -nostats
-v quiet -filter_complex testsrc -t 600 -c:v mpeg2video -f null -' (30
runs):
18207.403592 task-clock (msec) # 1.273 CPUs
utilized ( +- 0.99% )
300327 context-switches # 0.016 M/sec
( +- 0.00% )
860 cpu-migrations # 0.047 K/sec
( +- 6.30% )
153626 page-faults # 0.008 M/sec
( +- 0.00% )
47685530782 cycles # 2.619 GHz
( +- 0.15% )
17165731850 stalled-cycles-frontend # 36.00% frontend
cycles idle ( +- 0.41% )
0 stalled-cycles-backend # 0.00% backend
cycles idle
103428007012 instructions # 2.17 insns per cycle
# 0.17 stalled
cycles per insn ( +- 0.00% )
9127004846 branches # 501.280 M/sec
( +- 0.00% )
113822534 branch-misses # 1.25% of all
branches ( +- 0.12% )
14.305442763 seconds time elapsed
( +- 1.01% )
Performance counter stats for './avconv-v12_dev0-1273-g46914ff -nostats
-v quiet -i /tmp/test.mkv -f null -' (30 runs):
2364.470888 task-clock (msec) # 1.564 CPUs
utilized ( +- 1.49% )
150459 context-switches # 0.064 M/sec
( +- 0.02% )
177 cpu-migrations # 0.075 K/sec
( +- 12.06% )
773 page-faults # 0.327 K/sec
( +- 0.05% )
6823046093 cycles # 2.886 GHz
( +- 0.33% )
3953734628 stalled-cycles-frontend # 57.95% frontend
cycles idle ( +- 0.56% )
0 stalled-cycles-backend # 0.00% backend
cycles idle
8204593415 instructions # 1.20 insns per cycle
# 0.48 stalled
cycles per insn ( +- 0.00% )
1187962103 branches # 502.422 M/sec
( +- 0.01% )
20631618 branch-misses # 1.74% of all
branches ( +- 0.20% )
1.511403840 seconds time elapsed
( +- 1.48% )
Performance counter stats for './avconv-v12_dev0-1276-g9503449 -nostats
-v quiet -i /tmp/test.mkv -f null -' (30 runs):
2347.891829 task-clock (msec) # 1.562 CPUs
utilized ( +- 1.72% )
150424 context-switches # 0.064 M/sec
( +- 0.02% )
138 cpu-migrations # 0.059 K/sec
( +- 8.35% )
773 page-faults # 0.329 K/sec
( +- 0.05% )
6809473884 cycles # 2.900 GHz
( +- 0.33% )
3941879048 stalled-cycles-frontend # 57.89% frontend
cycles idle ( +- 0.59% )
0 stalled-cycles-backend # 0.00% backend
cycles idle
8204107450 instructions # 1.20 insns per cycle
# 0.48 stalled
cycles per insn ( +- 0.01% )
1187871561 branches # 505.931 M/sec
( +- 0.01% )
20597974 branch-misses # 1.73% of all
branches ( +- 0.15% )
1.502766680 seconds time elapsed
( +- 1.72% )
lu
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