fb641c4b54
This patch binds poll groups to SPDK thread through IO channel and assigns connections to poll groups instead of cores. iSCSI subsystem registers iSCSI global object as an IO device, and create poll groups as context of IO channels of the IO device. Each portal get and hold portal group on which the corresponding acceptor is running. When a connection is constructed, iSCSI subsystem assigns a poll group to the connection by getting it from the corresponding portal. When a connection enters full-feature phase, iSCSI subsystem schedules the connection to a poll group by round-robin. Then, each connection can know its running SPDK thread directly and can use SPDK message passing infrastructure instead of SPDK event framework. By this change, iSCSI connections are binded to SPDK thread, and not binded to processor core anymore. Some other changes in this patch are - core ID is removed from the output of get_iscsi_connections RPC. The upcoming patches will change the RPC to use spdk_for_each_channel and can access SPDK thread safely, and add SPDK thread ID instead. - utilize UT multithread framework added by the last patch to test iSCSI poll groups by UT. Change-Id: Iec73c778aa413bcabdb63141cc41d4160911ea0e Signed-off-by: Ben Walker <benjamin.walker@intel.com> Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com> Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/463359 Reviewed-by: Broadcom SPDK FC-NVMe CI <spdk-ci.pdl@broadcom.com> Reviewed-by: Jim Harris <james.r.harris@intel.com> Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> |
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| iscsi_top.cpp | ||
| Makefile | ||