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Recent debugging on vhost net zerocopy shows the need of tracepoints. So to help in vhost{net} debugging and performance analyzing, the following series adding basic tracepoints to vhost. Operations of both vhost and vhost_net were traced in current implementation. A top-like satistics displaying script were introduced to help the troubleshooting: vhost statistics vhost_virtio_update_used_idx

Recent debugging on vhost net zerocopy shows the need of tracepoints. So to help in vhost{net} debugging and performance analyzing, the following series adding basic tracepoints to vhost. Operations of both vhost and vhost_net were traced in current implementation. A top-like satistics displaying script were introduced to help the troubleshooting: vhost statistics vhost_virtio_update_used_idx

...fine _TRACE_SWIOTLBXEN_H + +#include <linux/tracepoint.h> + +TRACE_EVENT(bounced, + + TP_PROTO(struct device *dev, + dma_addr_t dev_addr, + size_t size, + int swiotlb_force), + + TP_ARGS(dev, dev_addr, size, swiotlb_force), + + TP_STRUCT__entry( + __string( dev_name, dev_name(dev) ) + __field( u64, dma_mask ) + __field( dma_addr_t, dev_addr ) + __field( size_t, size ) + __field( int, swiotlb_force ) + ), + + TP_fast_assign( + __assign_str(dev_name, dev_name(dev)); + __entry->dma_mask = (dev->dma_mask ? *dev->dma_mask : 0); + __entry->dev_addr = dev_addr; + __entry...

...fine _TRACE_SWIOTLBXEN_H + +#include <linux/tracepoint.h> + +TRACE_EVENT(bounced, + + TP_PROTO(struct device *dev, + dma_addr_t dev_addr, + size_t size, + int swiotlb_force), + + TP_ARGS(dev, dev_addr, size, swiotlb_force), + + TP_STRUCT__entry( + __string( dev_name, dev_name(dev) ) + __field( u64, dma_mask ) + __field( dma_addr_t, dev_addr ) + __field( size_t, size ) + __field( int, swiotlb_force ) + ), + + TP_fast_assign( + __assign_str(dev_name, dev_name(dev)); + __entry->dma_mask = (dev->dma_mask ? *dev->dma_mask : 0); + __entry->dev_addr = dev_addr; + __entry...

...fine _TRACE_SWIOTLBXEN_H + +#include <linux/tracepoint.h> + +TRACE_EVENT(bounced, + + TP_PROTO(struct device *dev, + dma_addr_t dev_addr, + size_t size, + int swiotlb_force), + + TP_ARGS(dev, dev_addr, size, swiotlb_force), + + TP_STRUCT__entry( + __string( dev_name, dev_name(dev) ) + __field( u64, dma_mask ) + __field( dma_addr_t, dev_addr ) + __field( size_t, size ) + __field( int, swiotlb_force ) + ), + + TP_fast_assign( + __assign_str(dev_name, dev_name(dev)); + __entry->dma_mask = (dev->dma_mask ? *dev->dma_mask : 0); + __entry->dev_addr = dev_addr; + __entry...

..._TRACE_SWIOTLB_H + +#include <linux/tracepoint.h> + +TRACE_EVENT(swiotlb_bounced, + + TP_PROTO(struct device *dev, + dma_addr_t dev_addr, + size_t size, + int swiotlb_force), + + TP_ARGS(dev, dev_addr, size, swiotlb_force), + + TP_STRUCT__entry( + __string( dev_name, dev_name(dev) ) + __field( u64, dma_mask ) + __field( dma_addr_t, dev_addr ) + __field( size_t, size ) + __field( int, swiotlb_force ) + ), + + TP_fast_assign( + __assign_str(dev_name, dev_name(dev)); + __entry->dma_mask = (dev->dma_mask ? *dev->dma_mask : 0); + __entry->dev_addr = dev_addr; + __entry...

..._TRACE_SWIOTLB_H + +#include <linux/tracepoint.h> + +TRACE_EVENT(swiotlb_bounced, + + TP_PROTO(struct device *dev, + dma_addr_t dev_addr, + size_t size, + int swiotlb_force), + + TP_ARGS(dev, dev_addr, size, swiotlb_force), + + TP_STRUCT__entry( + __string( dev_name, dev_name(dev) ) + __field( u64, dma_mask ) + __field( dma_addr_t, dev_addr ) + __field( size_t, size ) + __field( int, swiotlb_force ) + ), + + TP_fast_assign( + __assign_str(dev_name, dev_name(dev)); + __entry->dma_mask = (dev->dma_mask ? *dev->dma_mask : 0); + __entry->dev_addr = dev_addr; + __entry...

..._TRACE_SWIOTLB_H + +#include <linux/tracepoint.h> + +TRACE_EVENT(swiotlb_bounced, + + TP_PROTO(struct device *dev, + dma_addr_t dev_addr, + size_t size, + int swiotlb_force), + + TP_ARGS(dev, dev_addr, size, swiotlb_force), + + TP_STRUCT__entry( + __string( dev_name, dev_name(dev) ) + __field( u64, dma_mask ) + __field( dma_addr_t, dev_addr ) + __field( size_t, size ) + __field( int, swiotlb_force ) + ), + + TP_fast_assign( + __assign_str(dev_name, dev_name(dev)); + __entry->dma_mask = (dev->dma_mask ? *dev->dma_mask : 0); + __entry->dev_addr = dev_addr; + __entry...

To help in vhost analyzing, the following series adding basic tracepoints to vhost. Operations of both virtqueues and vhost works were traced in current implementation, net code were untouched. A top-like satistics displaying script were introduced to help the troubleshooting. TODO: - net specific tracepoints? --- Jason Wang (2): vhost: basic tracepoints tools: virtio: add a

To help in vhost analyzing, the following series adding basic tracepoints to vhost. Operations of both virtqueues and vhost works were traced in current implementation, net code were untouched. A top-like satistics displaying script were introduced to help the troubleshooting. TODO: - net specific tracepoints? --- Jason Wang (2): vhost: basic tracepoints tools: virtio: add a

...DM_IOBAND_H + +#include <linux/tracepoint.h> + +#undef TRACE_SYSTEM +#define TRACE_SYSTEM dm-ioband + +TRACE_EVENT(ioband_hold_urgent_bio, + + TP_PROTO(struct ioband_group *gp, struct bio *bio), + + TP_ARGS(gp, bio), + + TP_STRUCT__entry( + __string( g_name, gp->c_banddev->g_name ) + __field( int, c_id ) + __field( int, g_blocked ) + __field( int, c_blocked ) + __field( dev_t, dev ) + __field( sector_t, sector ) + __field( unsigned int, nr_sector ) + __field( char, rw ) + ), + + TP_fast_assign( + __assign_str(g_name, gp->c_banddev->g_name); + __entry->c...

...DM_IOBAND_H + +#include <linux/tracepoint.h> + +#undef TRACE_SYSTEM +#define TRACE_SYSTEM dm-ioband + +TRACE_EVENT(ioband_hold_urgent_bio, + + TP_PROTO(struct ioband_group *gp, struct bio *bio), + + TP_ARGS(gp, bio), + + TP_STRUCT__entry( + __string( g_name, gp->c_banddev->g_name ) + __field( int, c_id ) + __field( int, g_blocked ) + __field( int, c_blocked ) + __field( dev_t, dev ) + __field( sector_t, sector ) + __field( unsigned int, nr_sector ) + __field( char, rw ) + ), + + TP_fast_assign( + __assign_str(g_name, gp->c_banddev->g_name); + __entry->c...

...DM_IOBAND_H + +#include <linux/tracepoint.h> + +#undef TRACE_SYSTEM +#define TRACE_SYSTEM dm-ioband + +TRACE_EVENT(ioband_hold_urgent_bio, + + TP_PROTO(struct ioband_group *gp, struct bio *bio), + + TP_ARGS(gp, bio), + + TP_STRUCT__entry( + __string( g_name, gp->c_banddev->g_name ) + __field( int, c_id ) + __field( int, g_blocked ) + __field( int, c_blocked ) + __field( dev_t, dev ) + __field( sector_t, sector ) + __field( unsigned int, nr_sector ) + __field( char, rw ) + ), + + TP_fast_assign( + __assign_str(g_name, gp->c_banddev->g_name); + __entry->c...

Hi all, These are new releases of dm-ioband and blkio-cgroup. The major changes of these releases are: - dm-ioband can be configured through the cgroup interface. The bandwidth can be assigned on a per cgroup per block device basis. - The event tracing is supported that helps in debugging and monitoring dm-ioband. - A document for blkio-cgroup is available at

Hi all, These are new releases of dm-ioband and blkio-cgroup. The major changes of these releases are: - dm-ioband can be configured through the cgroup interface. The bandwidth can be assigned on a per cgroup per block device basis. - The event tracing is supported that helps in debugging and monitoring dm-ioband. - A document for blkio-cgroup is available at

Hi all, These are new releases of dm-ioband and blkio-cgroup. The major changes of these releases are: - dm-ioband can be configured through the cgroup interface. The bandwidth can be assigned on a per cgroup per block device basis. - The event tracing is supported that helps in debugging and monitoring dm-ioband. - A document for blkio-cgroup is available at

...DM_IOBAND_H + +#include <linux/tracepoint.h> + +#undef TRACE_SYSTEM +#define TRACE_SYSTEM dm-ioband + +TRACE_EVENT(ioband_hold_urgent_bio, + + TP_PROTO(struct ioband_group *gp, struct bio *bio), + + TP_ARGS(gp, bio), + + TP_STRUCT__entry( + __string( g_name, gp->c_banddev->g_name ) + __field( int, c_id ) + __field( int, g_blocked ) + __field( int, c_blocked ) + __field( dev_t, dev ) + __field( sector_t, sector ) + __field( unsigned int, nr_sector ) + __field( char, rw ) + ), + + TP_fast_assign( + __assign_str(g_name, gp->c_banddev->g_name); + __entry->c...

...DM_IOBAND_H + +#include <linux/tracepoint.h> + +#undef TRACE_SYSTEM +#define TRACE_SYSTEM dm-ioband + +TRACE_EVENT(ioband_hold_urgent_bio, + + TP_PROTO(struct ioband_group *gp, struct bio *bio), + + TP_ARGS(gp, bio), + + TP_STRUCT__entry( + __string( g_name, gp->c_banddev->g_name ) + __field( int, c_id ) + __field( int, g_blocked ) + __field( int, c_blocked ) + __field( dev_t, dev ) + __field( sector_t, sector ) + __field( unsigned int, nr_sector ) + __field( char, rw ) + ), + + TP_fast_assign( + __assign_str(g_name, gp->c_banddev->g_name); + __entry->c...

...DM_IOBAND_H + +#include <linux/tracepoint.h> + +#undef TRACE_SYSTEM +#define TRACE_SYSTEM dm-ioband + +TRACE_EVENT(ioband_hold_urgent_bio, + + TP_PROTO(struct ioband_group *gp, struct bio *bio), + + TP_ARGS(gp, bio), + + TP_STRUCT__entry( + __string( g_name, gp->c_banddev->g_name ) + __field( int, c_id ) + __field( int, g_blocked ) + __field( int, c_blocked ) + __field( dev_t, dev ) + __field( sector_t, sector ) + __field( unsigned int, nr_sector ) + __field( char, rw ) + ), + + TP_fast_assign( + __assign_str(g_name, gp->c_banddev->g_name); + __entry->c...

Hi all, These are new releases of dm-ioband and blkio-cgroup. The major change of these releases is that a hierarchical configuration is supported, a parent cgroup's bandwidth is distributed to its children. The hierarchical configuration is available when using dm-ioband and blkio-cgroup together. Please refer to the documentation included in this series of patches on how to use it. The