From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Wed, 19 Jun 2019 20:10:31 +0100 From: "Dr. David Alan Gilbert" Message-ID: <20190619191030.GI2844@work-vm> References: <2D50E1B6-E051-42F1-8962-71B7436E4CF9@stackhpc.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <2D50E1B6-E051-42F1-8962-71B7436E4CF9@stackhpc.com> Subject: Re: [Virtio-fs] Issues running fio tests against a network mount routed from the host List-Id: Development discussions about virtio-fs List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Bharat Kunwar Cc: virtio-fs@redhat.com * Bharat Kunwar (bharat@stackhpc.com) wrote: > Hello Hi, > I am here to describe a problem that I’ve run into when trying to run `fio` against a network mount routed from the host using virtiofs. My wider context is that I am doing this in a kata-containerised Kubernetes environment using the new `kata-qemu` introduced in version 1.7. I have previously run the same tests with `kata-qemu` runtime with 9p filesystem and the same tests have run to completion. > > Just to clarify, I can run the same fio tests to a local filesystem on the host and things run happily to completion. I have attached perf flame graphs corresponding to the failure cases, BeeGFS and CephFS and the successful case with host filesystem. The Fhgfs* process are related to BeeGFS. > > I enabled debug on the kata side the the resulting systemd journal entries are captured in debug.log attached. Let me know if I can provide any more diagnostic info. I am currently attempting to build an image to boot up with symbols enabled so that I can capture some backtraces but that is all taking longer than expected (having never built a kernel tarball before). If there is a prebuilt image that I can use to boot up to use with virtiofs, let me know as that’d save me a ton of time. For some reason the SVGs don't seem to want to open for me; but they're probably the wrong thing anyway; and I don't see the log you say you attacked - those sound potentially useful. Which fio test fails exactly, and with what error? Dave > Best > > Bharat > > > > > > _______________________________________________ > Virtio-fs mailing list > Virtio-fs@redhat.com > https://www.redhat.com/mailman/listinfo/virtio-fs -- Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK