在博客文章?使用 AXI performance monitors (APM)測試MPSoC DDR訪問帶寬?中介紹了DDR帶寬測試工具"apm_main.elf"。使用過程中，發(fā)現(xiàn)還有些不足。它只能測試端口1/2/4/5，只能打印帶寬。很多場合需要更多信息。于是更新了這個工具，可以測試所有端口，可以測試最小、最大、平均延時，也可以測試帶寬，最后還會匯報總的帶寬。注意，每個端口的測試是依次進行的，不是同時進行的。

舊工具"apm_main.elf"的輸出：

root@zcu106_vcu_trd:/run# ./apm_main.elf  -d /dev/uio2
AXI PMON is in Advanced Mode
port 1 read: 152688 0.15 MBps
port 1 write: 41344 0.04 MBps
port 2 read: 121568 0.12 MBps
port 2 write: 26884 0.03 MBps
port 4 read: 0 0.00 MBps
port 4 write: 0 0.00 MBps
port 5 read: 0 0.00 MBps
port 5 write: 0 0.00 MBps

新工具"apm_main.elf"的輸出：

root@zcu106_vcu_llp2_audio_nv12:/run# ./apm_latency_all.elf -d /dev/uio2
AXI PMON is in Advanced Mode
S0, Port0, LPD Main Switch
port 0 Write Transaction Count: 0000000000     0.00 MTps
port 0  Read Transaction Count: 0000000000     0.00 MTps
port 0 Write Byte Count: 0000000000     0.00 MBps
port 0  Read Byte Count: 0000000000     0.00 MBps
port 0 Maximum Write Latency: 0000000000 cycles
port 0 Maximum  Read Latency: 0000000000 cycles
port 0 Minimum Write Latency: 4294967295 cycles
port 0 Minimum  Read Latency: 4294967295 cycles


S1, Port0, FPD CCI Main Switch; GPU, ACP, HPC0, HPC1
port 1 Write Transaction Count: 0007828067     7.83 MTps
port 1  Read Transaction Count: 0008704014     8.70 MTps
port 1 Write Byte Count: 0477243318   477.24 MBps
port 1 Average Write Transaction Size:    60.97 Bytes
port 1  Read Byte Count: 0539179840   539.18 MBps
port 1 Average  Read Transaction Size:    61.95 Bytes
port 1 Total  Write Latency: 0045395180, average:     5.80 cycles
port 1 Total  Read Latency: 0882098985, average:   101.34 cycles
port 1 Maximum Write Latency: 0000001671 cycles
port 1 Maximum  Read Latency: 0000001444 cycles
port 1 Minimum Write Latency: 0000000001 cycles
port 1 Minimum  Read Latency: 0000000035 cycles


S2, Port2, FPD CCI Main Switch; GPU, ACP, HPC0, HPC1
port 2 Write Transaction Count: 0010030804    10.03 MTps
port 2  Read Transaction Count: 0008823563     8.82 MTps
port 2 Write Byte Count: 0619787783   619.79 MBps
port 2 Average Write Transaction Size:    61.79 Bytes
port 2  Read Byte Count: 0548313408   548.31 MBps
port 2 Average  Read Transaction Size:    62.14 Bytes
port 2 Total  Write Latency: 0095816478, average:     9.55 cycles
port 2 Total  Read Latency: 0930169130, average:   105.42 cycles
port 2 Maximum Write Latency: 0000001355 cycles
port 2 Maximum  Read Latency: 0000002109 cycles
port 2 Minimum Write Latency: 0000000001 cycles
port 2 Minimum  Read Latency: 0000000035 cycles


S3, Port3, HP0, DP
port 3 Write Transaction Count: 0000000000     0.00 MTps
port 3  Read Transaction Count: 0003883411     3.88 MTps
port 3 Write Byte Count: 0000000000     0.00 MBps
port 3  Read Byte Count: 0994147488   994.15 MBps
port 3 Average  Read Transaction Size:   256.00 Bytes
port 3 Total  Read Latency: 0380278193, average:    97.92 cycles
port 3 Maximum Write Latency: 0000000000 cycles
port 3 Maximum  Read Latency: 0000000480 cycles
port 3 Minimum Write Latency: 4294967295 cycles
port 3 Minimum  Read Latency: 0000000050 cycles


S4, Port4, HP1
port 4 Write Transaction Count: 0000000000     0.00 MTps
port 4  Read Transaction Count: 0000000000     0.00 MTps
port 4 Write Byte Count: 0000000000     0.00 MBps
port 4  Read Byte Count: 0000000000     0.00 MBps
port 4 Maximum Write Latency: 0000000000 cycles
port 4 Maximum  Read Latency: 0000000000 cycles
port 4 Minimum Write Latency: 4294967295 cycles
port 4 Minimum  Read Latency: 4294967295 cycles


S5, Port5, HP3
port 5 Write Transaction Count: 0017064390    17.06 MTps
port 5  Read Transaction Count: 0037150803    37.15 MTps
port 5 Write Byte Count: 1131512512  1131.51 MBps
port 5 Average Write Transaction Size:    66.31 Bytes
port 5  Read Byte Count: 1328995568  1329.00 MBps
port 5 Average  Read Transaction Size:    35.77 Bytes
port 5 Total  Write Latency: 0101187053, average:     5.93 cycles
port 5 Total  Read Latency: 0396740885, average:    10.68 cycles
port 5 Maximum Write Latency: 0000000980 cycles
port 5 Maximum  Read Latency: 0000001099 cycles
port 5 Minimum Write Latency: 0000000001 cycles
port 5 Minimum  Read Latency: 0000000035 cycles


All ports Write Byte Count: 2228543613  2228.54 MBps
All ports  Read Byte Count: 3410636304  3410.64 MBps

如果有需要，可以聯(lián)系FAE獲取工具。

　　審核編輯：湯梓紅