Visible to Intel only — GUID: uyv1619823391140
Ixiasoft
Visible to Intel only — GUID: uyv1619823391140
Ixiasoft
3.5.2.3.3.3. BAM Test
If the BAM support is enabled on hardware, enable the following flag in common/mk/common.mk:
__cflags += -DIFC_PIO_256 → 256b read/write operations on PIO BAR
__cflags += -DIFC_PIO_128 → 128b read/write operations on PIO BAR
For PIO using Bypass with BAM/BAS user mode, you are required to change the define parameter to undef: #undef IFC_QDMA_INTF_ST(software/user/common/include/mcdma_ip_params.h)
![](/content/dam/docs/us/en/683517/24-2/hcs1619823838456.png)
![](/content/dam/docs/us/en/683517/24-2/rra1619824131470.png)
![](/content/dam/docs/us/en/683517/24-2/ezx1619824304899.png)
![](/content/dam/docs/us/en/683517/24-2/msa1619824458869.png)
To test the PIO/BAM performance, please use the following command:
[root@bapvemb005t perfq_app]# ./perfq_app -b 0000:01:00.0 --bam_perf -o PIO 64 Write and Read Perf Test ... Total Bandwidth: 0.14GBPS Pass [root@bapvemb005t perfq_app]#
- By default BAM/BAS, BAR is 2. If DMA Hardware supports both BAM/BAS and BAR numbers are different, then pass BAR number parameter as below:
--bar=2 for BAM
--bar=0 for BAS
-
For example:
./perfq_app -b 0000:01:00.0 --bam_perf -o --bar=2
- Performance mode of BAM tries to send the data for 10 seconds and calculates the bandwidth
- PIO 256b test may display fail because of the reason that 2k memory only enabled in device and PIO test trying to access the memory > 2k