硬件加密卡，硬件加解密卡。

用于把加密解密，数据压缩等，从CPU卸载到加速卡上。

所有文档汇总：https://01.org/intel-quickassist-technology

性能调优手册：https://01.org/sites/default/files/downloads//330687qatperformanceoptimizationguiderev007us.pdf

三种编程模型：interrupt mode， polling mode，，epoll mode

intel保举polling mode

简单的一些打点要领，备忘

[[email protected] ~]# lspci |grep QAT 05:00.0 Co-processor: Intel Corporation DH895XCC Series QAT [[email protected] ~]# ls /sys/kernel/debug/qat_dh895xcc_0000\:05\:00.0/ cnv_errors dev_cfg fw_counters heartbeat heartbeat_failed heartbeat_sent transport version [[email protected] ~]# cat /sys/kernel/debug/qat_dh895xcc_0000\:05\:00.0/fw_counters +------------------------------------------------+ | FW Statistics for Qat Device | +------------------------------------------------+ | Firmware Requests [AE 0]: 27465873 | | Firmware Responses[AE 0]: 27465873 | +------------------------------------------------+ ... ...