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04 Jun 2019 23:55:45 -0700 Subject: Re: [PATCH v4 7/9] iommu/vt-d: Add trace events for domain map/unmap To: Steven Rostedt References: <20190603011620.31999-1-baolu.lu@linux.intel.com> <20190603011620.31999-8-baolu.lu@linux.intel.com> <20190604050122.4a095569@oasis.local.home> From: Lu Baolu Message-ID: <759e5f85-354c-fdf0-f31d-5df90481d75e@linux.intel.com> Date: Wed, 5 Jun 2019 14:48:45 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <20190604050122.4a095569@oasis.local.home> Content-Language: en-US Cc: alan.cox@intel.com, Christoph Hellwig , Stefano Stabellini , ashok.raj@intel.com, Jonathan Corbet , pengfei.xu@intel.com, Ingo Molnar , David Woodhouse , kevin.tian@intel.com, Konrad Rzeszutek Wilk , Bjorn Helgaas , Boris Ostrovsky , mika.westerberg@linux.intel.com, Juergen Gross , Greg Kroah-Hartman , linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, jacob.jun.pan@intel.com, Robin Murphy X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: iommu-bounces@lists.linux-foundation.org Errors-To: iommu-bounces@lists.linux-foundation.org Hi Steve, On 6/4/19 5:01 PM, Steven Rostedt wrote: > On Mon, 3 Jun 2019 09:16:18 +0800 > Lu Baolu wrote: > > >> +TRACE_EVENT(bounce_unmap_single, >> + TP_PROTO(struct device *dev, dma_addr_t dev_addr, size_t size), >> + >> + TP_ARGS(dev, dev_addr, size), >> + >> + TP_STRUCT__entry( >> + __string(dev_name, dev_name(dev)) >> + __field(dma_addr_t, dev_addr) >> + __field(size_t, size) >> + ), >> + >> + TP_fast_assign( >> + __assign_str(dev_name, dev_name(dev)); >> + __entry->dev_addr = dev_addr; >> + __entry->size = size; >> + ), >> + >> + TP_printk("dev=%s dev_addr=0x%llx size=%zu", >> + __get_str(dev_name), >> + (unsigned long long)__entry->dev_addr, >> + __entry->size) >> +); >> + >> +TRACE_EVENT(bounce_map_sg, >> + TP_PROTO(struct device *dev, unsigned int i, unsigned int nelems, >> + dma_addr_t dev_addr, phys_addr_t phys_addr, size_t size), >> + >> + TP_ARGS(dev, i, nelems, dev_addr, phys_addr, size), >> + >> + TP_STRUCT__entry( >> + __string(dev_name, dev_name(dev)) >> + __field(unsigned int, i) >> + __field(unsigned int, last) >> + __field(dma_addr_t, dev_addr) >> + __field(phys_addr_t, phys_addr) >> + __field(size_t, size) >> + ), >> + >> + TP_fast_assign( >> + __assign_str(dev_name, dev_name(dev)); >> + __entry->i = i; >> + __entry->last = nelems - 1; >> + __entry->dev_addr = dev_addr; >> + __entry->phys_addr = phys_addr; >> + __entry->size = size; >> + ), >> + >> + TP_printk("dev=%s elem=%u/%u dev_addr=0x%llx phys_addr=0x%llx size=%zu", >> + __get_str(dev_name), __entry->i, __entry->last, >> + (unsigned long long)__entry->dev_addr, >> + (unsigned long long)__entry->phys_addr, >> + __entry->size) >> +); >> + >> +TRACE_EVENT(bounce_unmap_sg, >> + TP_PROTO(struct device *dev, unsigned int i, unsigned int nelems, >> + dma_addr_t dev_addr, phys_addr_t phys_addr, size_t size), >> + >> + TP_ARGS(dev, i, nelems, dev_addr, phys_addr, size), >> + >> + TP_STRUCT__entry( >> + __string(dev_name, dev_name(dev)) >> + __field(unsigned int, i) >> + __field(unsigned int, last) >> + __field(dma_addr_t, dev_addr) >> + __field(phys_addr_t, phys_addr) >> + __field(size_t, size) >> + ), >> + >> + TP_fast_assign( >> + __assign_str(dev_name, dev_name(dev)); >> + __entry->i = i; >> + __entry->last = nelems - 1; >> + __entry->dev_addr = dev_addr; >> + __entry->phys_addr = phys_addr; >> + __entry->size = size; >> + ), >> + >> + TP_printk("dev=%s elem=%u/%u dev_addr=0x%llx phys_addr=0x%llx size=%zu", >> + __get_str(dev_name), __entry->i, __entry->last, >> + (unsigned long long)__entry->dev_addr, >> + (unsigned long long)__entry->phys_addr, >> + __entry->size) >> +); > > These last two events look identical. Please use the > DECLARE_EVENT_CLASS() to describe the event and then DEFINE_EVENT() for > the two events. > > Each TRACE_EVENT() can add up to 5k of data/text, where as a > DEFINE_EVENT() just adds around 250 bytes. > > (Note, a TRACE_EVENT() is defined as a > DECLARE_EVENT_CLASS()/DEFINE_EVENT() pair) Thanks for reviewing. I will rework this patch according to your comments here. > > -- Steve > Best regards, Baolu > >> +#endif /* _TRACE_INTEL_IOMMU_H */ >> + >> +/* This part must be outside protection */ >> +#include > > _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu