What's the copyright on this? Is it something we could potentially commit and ship (and presumably keep updated when/if structures change, or possibly emit as part of the build?)
On Thu, Oct 25, 2012 at 6:48 PM, Robert Milkowski <[email protected]> wrote: > Hi, > > Couple of people asked me about the dtrace scripts I referred to during my > presentation. > Below is one of them - it is a very quickly written script, only tested on > our 1.4.11 based tree (with lots of patches, specifically DAFS), but there > is a good chance it will just work on 1.4.11+ and maybe even on 1.6 (I > haven't tried it though). It makes some very specific assumptions about how > a given release of OpenAFS works, and it might not work correctly or at all > for you - although it should be trivial to fix it then. > > Please use it at your own risk. > > The script requires two arguments - pid of fileserver, and how often it > should print its output (for example 5s). > It then clears terminal at a specified interval and prints all the volumes > which were read or written to since the script was started, sorted by the > number of read MBs. > > Example output: > > > # ./volume_top.d `pgrep fileserver` 5s > [...] > > Mountpoint VolID Read[MB] Wrote[MB] > > =============== ============ ========= ========= > /vicepa 542579958 100 10 > /vicepa 536904476 0 24 > /vicepb 536874428 0 0 > ============ ========= ========= > 100 34 > > > started: 2010 Nov 8 16:16:01 > current: 2010 Nov 8 16:25:46 > > > > > $ cat volume_top.d > #!/usr/sbin/dtrace -qCs > > typedef unsigned int afs_uint32; > typedef long long afs_int64; > typedef int afs_int32; > > typedef afs_uint32 VolumeId; > typedef afs_uint32 bit32; /* Unsigned, 32 bits */ > typedef bit32 Device; /* Unix device number */ > > struct rx_queue { > struct rx_queue *prev; > struct rx_queue *next; > }; > > struct DiskPartition64 { > struct DiskPartition64 *next; > char *name; /* Mounted partition name */ > char *devName; /* Device mounted on */ > Device device; /* device number */ > afs_int32 index; /* partition index (0<=x<=VOLMAXPARTS) */ > int lock_fd; /* File descriptor of this partition if > locked; otherwise -1; > * Not used by the file server */ > afs_int64 free; /* Total number of blocks (1K) > presumed > * available on this partition (accounting > * for the minfree parameter for the > * partition). This is adjusted > * approximately by the sizes of files > * and directories read/written, and > * periodically the superblock is read and > * this is recomputed. This number can > * be negative, if the partition starts > * out too full */ > afs_int64 totalUsable; /* Total number of blocks available > on this > * partition, taking into account the > minfree > * parameter for the partition (see the > * 4.2bsd command tunefs, but note that the > * bug mentioned there--that the superblock > * is not reread--does not apply here. The > * superblock is re-read periodically by > * VSetPartitionDiskUsage().) */ > afs_int64 minFree; /* Number blocks to be kept free, as last > read > * from the superblock */ > int flags; > afs_int64 f_files; /* total number of files in this partition > */ > }; /* IT IS NOT a complete structure definition */ > > > typedef struct Volume { > struct rx_queue q; /* Volume hash chain pointers */ > VolumeId hashid; /* Volume number -- for hash table lookup */ > void *header; /* Cached disk data - FAKED TYPE */ > Device device; /* Unix device for the volume */ > struct DiskPartition64 > *partition; /* Information about the Unix partition */ > > }; /* it is not the entire structure! */ > > > BEGIN > { > start_timestamp = timestamp; > start_walltimestamp = walltimestamp; > } > > > pid$1:a.out:FetchData_RXStyle:entry > { > self->fetchdata = 1; > this->volume = (struct Volume *)copyin(arg0, sizeof(struct Volume)); > this->partition = (struct DiskPartition64 > *)copyin((uintptr_t)this->volume->partition, sizeof(struct > DiskPartition64)); > self->volumeid = this->volume->hashid; > self->partition_name = copyinstr((uintptr_t)this->partition->name); > } > > pid$1:a.out:FetchData_RXStyle:return > / self->fetchdata / > { > self->fetchdata = 0; > self->volumeid = 0; > self->partition_name = 0; > } > > syscall::readv:return > / self->fetchdata / > { > @rx_fetchdata[self->partition_name, self->volumeid] = sum(arg0); > @rx_fetchdata_total = sum(arg0); > } > > pid$1:a.out:StoreData_RXStyle:entry > { > self->storedata = 1; > this->volume = (struct Volume *)copyin(arg0, sizeof(struct Volume)); > this->partition = (struct DiskPartition64 > *)copyin((uintptr_t)this->volume->partition, sizeof(struct > DiskPartition64)); > self->volumeid = this->volume->hashid; > self->partition_name = copyinstr((uintptr_t)this->partition->name); > } > > pid$1:a.out:StoreData_RXStyle:return > / self->storedata / > { > self->storedata = 0; > self->volumeid = 0; > self->partition_name = 0; > } > > syscall::writev:return > / self->storedata / > { > @rx_storedata[self->partition_name, self->volumeid] = sum(arg0); > @rx_storedata_total = sum(arg0); > } > > > tick-$2 > { > setopt("aggsortrev", "true"); > printf("\033[H\033[J"); > > normalize(@rx_fetchdata, 1024*1024); > normalize(@rx_storedata, 1024*1024); > normalize(@rx_fetchdata_total, 1024*1024); > normalize(@rx_storedata_total, 1024*1024); > > printf("Mountpoint Volume ID Read[MB] Wrote[MB]\n"); > printf("=============== ============ ========= =========\n"); > printa("%-15s %12d %@9d %@9d\n", \ > @rx_fetchdata, @rx_storedata); > printf(" ============ ========= =========\n"); > printf("%-15s %12s ", " ", " "); > printa("%@9d %@9d\n", @rx_fetchdata_total, @rx_storedata_total); > > printf("\n\n"); > printf(" started: %Y\n", start_walltimestamp); > printf(" current: %Y\n", walltimestamp); > > } > > > > -- > Robert Milkowski > http://milek.blogspot.com > > > _______________________________________________ > OpenAFS-info mailing list > [email protected] > https://lists.openafs.org/mailman/listinfo/openafs-info > -- Derrick _______________________________________________ OpenAFS-info mailing list [email protected] https://lists.openafs.org/mailman/listinfo/openafs-info
