On 8/21/19 1:07 PM, Arnaldo Carvalho de Melo wrote: > Em Wed, Aug 21, 2019 at 04:54:47PM +0000, Yonghong Song escreveu: >> Arnaldo has a question on bcc mailing list about the hit/miss >> counting of bpf program missed to process events. > >> https://urldefense.proofpoint.com/v2/url?u=https-3A__lists.iovisor.org_g_iovisor-2Ddev_message_1783&d=DwIBAg&c=5VD0RTtNlTh3ycd41b3MUw&r=DA8e1B5r073vIqRrFz7MRA&m=Rrvq6K3mx2wYBCU6cSXLjJj8Xfb06oymxNZH8ysnlLA&s=IbEaX8v0OulmvKU-pmcAhWNmaHwXgaDd5auVFfRoyJg&e= > > PERF_FORMAT_LOST seems to be a good answer to that? See my other reply > to this thread. Just checked. indeed adding PERF_FORMAT_LOST to perf read_format seems a reasonable approach. ioctl with perf_event_open fd can do the same thing, but ioctl should be avoided if we have alternatives. Thanks for the pointer! > > - Arnaldo >
