From: Ming Lei <tom.leim...@gmail.com> Date: Tue, 29 Dec 2015 22:40:24 +0800
> Hi, > > This patchset tries to optimize ebpf hash map, and follows > the idea: > > Both htab_map_update_elem() and htab_map_delete_elem() > can be called from eBPF program, and they may be in kernel > hot path, it isn't efficient to use a per-hashtable lock > in this two helpers, so this patch converts the lock into > per-bucket spinlock. > > With this patchset, looks the performance penalty from eBPF > decreased a lot, see the following test: > > 1) run 'tools/biolatency' of bcc before running block test; > > 2) run fio to test block throught over /dev/nullb0, > (randread, 16jobs, libaio, 4k bs) and the test box > is one 24cores(dual sockets) VM server: > - without patchset: 607K IOPS > - with this patchset: 1184K IOPS > - without running eBPF prog: 1492K IOPS Series applied, thanks. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
