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authorChristoph Hellwig <hch@infradead.org>2009-12-14 23:14:59 +0000
committerAlex Elder <aelder@sgi.com>2009-12-14 23:08:16 -0600
commit0b1b213fcf3a8486ada99a2bab84ab8c6f51b264 (patch)
tree661fd8da7487231224c77b95c33986cb7d7b41ef /fs/xfs/xfs_attr.c
parent6ef3554422e2c7e7aa424ba63737da498881dff4 (diff)
downloadblackbird-op-linux-0b1b213fcf3a8486ada99a2bab84ab8c6f51b264.tar.gz
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xfs: event tracing support
Convert the old xfs tracing support that could only be used with the out of tree kdb and xfsidbg patches to use the generic event tracer. To use it make sure CONFIG_EVENT_TRACING is enabled and then enable all xfs trace channels by: echo 1 > /sys/kernel/debug/tracing/events/xfs/enable or alternatively enable single events by just doing the same in one event subdirectory, e.g. echo 1 > /sys/kernel/debug/tracing/events/xfs/xfs_ihold/enable or set more complex filters, etc. In Documentation/trace/events.txt all this is desctribed in more detail. To reads the events do a cat /sys/kernel/debug/tracing/trace Compared to the last posting this patch converts the tracing mostly to the one tracepoint per callsite model that other users of the new tracing facility also employ. This allows a very fine-grained control of the tracing, a cleaner output of the traces and also enables the perf tool to use each tracepoint as a virtual performance counter, allowing us to e.g. count how often certain workloads git various spots in XFS. Take a look at http://lwn.net/Articles/346470/ for some examples. Also the btree tracing isn't included at all yet, as it will require additional core tracing features not in mainline yet, I plan to deliver it later. And the really nice thing about this patch is that it actually removes many lines of code while adding this nice functionality: fs/xfs/Makefile | 8 fs/xfs/linux-2.6/xfs_acl.c | 1 fs/xfs/linux-2.6/xfs_aops.c | 52 - fs/xfs/linux-2.6/xfs_aops.h | 2 fs/xfs/linux-2.6/xfs_buf.c | 117 +-- fs/xfs/linux-2.6/xfs_buf.h | 33 fs/xfs/linux-2.6/xfs_fs_subr.c | 3 fs/xfs/linux-2.6/xfs_ioctl.c | 1 fs/xfs/linux-2.6/xfs_ioctl32.c | 1 fs/xfs/linux-2.6/xfs_iops.c | 1 fs/xfs/linux-2.6/xfs_linux.h | 1 fs/xfs/linux-2.6/xfs_lrw.c | 87 -- fs/xfs/linux-2.6/xfs_lrw.h | 45 - fs/xfs/linux-2.6/xfs_super.c | 104 --- fs/xfs/linux-2.6/xfs_super.h | 7 fs/xfs/linux-2.6/xfs_sync.c | 1 fs/xfs/linux-2.6/xfs_trace.c | 75 ++ fs/xfs/linux-2.6/xfs_trace.h | 1369 +++++++++++++++++++++++++++++++++++++++++ fs/xfs/linux-2.6/xfs_vnode.h | 4 fs/xfs/quota/xfs_dquot.c | 110 --- fs/xfs/quota/xfs_dquot.h | 21 fs/xfs/quota/xfs_qm.c | 40 - fs/xfs/quota/xfs_qm_syscalls.c | 4 fs/xfs/support/ktrace.c | 323 --------- fs/xfs/support/ktrace.h | 85 -- fs/xfs/xfs.h | 16 fs/xfs/xfs_ag.h | 14 fs/xfs/xfs_alloc.c | 230 +----- fs/xfs/xfs_alloc.h | 27 fs/xfs/xfs_alloc_btree.c | 1 fs/xfs/xfs_attr.c | 107 --- fs/xfs/xfs_attr.h | 10 fs/xfs/xfs_attr_leaf.c | 14 fs/xfs/xfs_attr_sf.h | 40 - fs/xfs/xfs_bmap.c | 507 +++------------ fs/xfs/xfs_bmap.h | 49 - fs/xfs/xfs_bmap_btree.c | 6 fs/xfs/xfs_btree.c | 5 fs/xfs/xfs_btree_trace.h | 17 fs/xfs/xfs_buf_item.c | 87 -- fs/xfs/xfs_buf_item.h | 20 fs/xfs/xfs_da_btree.c | 3 fs/xfs/xfs_da_btree.h | 7 fs/xfs/xfs_dfrag.c | 2 fs/xfs/xfs_dir2.c | 8 fs/xfs/xfs_dir2_block.c | 20 fs/xfs/xfs_dir2_leaf.c | 21 fs/xfs/xfs_dir2_node.c | 27 fs/xfs/xfs_dir2_sf.c | 26 fs/xfs/xfs_dir2_trace.c | 216 ------ fs/xfs/xfs_dir2_trace.h | 72 -- fs/xfs/xfs_filestream.c | 8 fs/xfs/xfs_fsops.c | 2 fs/xfs/xfs_iget.c | 111 --- fs/xfs/xfs_inode.c | 67 -- fs/xfs/xfs_inode.h | 76 -- fs/xfs/xfs_inode_item.c | 5 fs/xfs/xfs_iomap.c | 85 -- fs/xfs/xfs_iomap.h | 8 fs/xfs/xfs_log.c | 181 +---- fs/xfs/xfs_log_priv.h | 20 fs/xfs/xfs_log_recover.c | 1 fs/xfs/xfs_mount.c | 2 fs/xfs/xfs_quota.h | 8 fs/xfs/xfs_rename.c | 1 fs/xfs/xfs_rtalloc.c | 1 fs/xfs/xfs_rw.c | 3 fs/xfs/xfs_trans.h | 47 + fs/xfs/xfs_trans_buf.c | 62 - fs/xfs/xfs_vnodeops.c | 8 70 files changed, 2151 insertions(+), 2592 deletions(-) Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_attr.c')
-rw-r--r--fs/xfs/xfs_attr.c107
1 files changed, 9 insertions, 98 deletions
diff --git a/fs/xfs/xfs_attr.c b/fs/xfs/xfs_attr.c
index 8fe6f6b78a4a..e953b6cfb2a8 100644
--- a/fs/xfs/xfs_attr.c
+++ b/fs/xfs/xfs_attr.c
@@ -47,6 +47,7 @@
#include "xfs_trans_space.h"
#include "xfs_rw.h"
#include "xfs_vnodeops.h"
+#include "xfs_trace.h"
/*
* xfs_attr.c
@@ -89,10 +90,6 @@ STATIC int xfs_attr_rmtval_remove(xfs_da_args_t *args);
#define ATTR_RMTVALUE_MAPSIZE 1 /* # of map entries at once */
-#if defined(XFS_ATTR_TRACE)
-ktrace_t *xfs_attr_trace_buf;
-#endif
-
STATIC int
xfs_attr_name_to_xname(
struct xfs_name *xname,
@@ -640,7 +637,6 @@ xfs_attr_list_int(xfs_attr_list_context_t *context)
return EIO;
xfs_ilock(dp, XFS_ILOCK_SHARED);
- xfs_attr_trace_l_c("syscall start", context);
/*
* Decide on what work routines to call based on the inode size.
@@ -656,7 +652,6 @@ xfs_attr_list_int(xfs_attr_list_context_t *context)
}
xfs_iunlock(dp, XFS_ILOCK_SHARED);
- xfs_attr_trace_l_c("syscall end", context);
return error;
}
@@ -702,7 +697,7 @@ xfs_attr_put_listent(xfs_attr_list_context_t *context, int flags,
context->count * sizeof(alist->al_offset[0]);
context->firstu -= ATTR_ENTSIZE(namelen);
if (context->firstu < arraytop) {
- xfs_attr_trace_l_c("buffer full", context);
+ trace_xfs_attr_list_full(context);
alist->al_more = 1;
context->seen_enough = 1;
return 1;
@@ -714,7 +709,7 @@ xfs_attr_put_listent(xfs_attr_list_context_t *context, int flags,
aep->a_name[namelen] = 0;
alist->al_offset[context->count++] = context->firstu;
alist->al_count = context->count;
- xfs_attr_trace_l_c("add", context);
+ trace_xfs_attr_list_add(context);
return 0;
}
@@ -1853,7 +1848,7 @@ xfs_attr_node_list(xfs_attr_list_context_t *context)
node = bp->data;
switch (be16_to_cpu(node->hdr.info.magic)) {
case XFS_DA_NODE_MAGIC:
- xfs_attr_trace_l_cn("wrong blk", context, node);
+ trace_xfs_attr_list_wrong_blk(context);
xfs_da_brelse(NULL, bp);
bp = NULL;
break;
@@ -1861,20 +1856,18 @@ xfs_attr_node_list(xfs_attr_list_context_t *context)
leaf = bp->data;
if (cursor->hashval > be32_to_cpu(leaf->entries[
be16_to_cpu(leaf->hdr.count)-1].hashval)) {
- xfs_attr_trace_l_cl("wrong blk",
- context, leaf);
+ trace_xfs_attr_list_wrong_blk(context);
xfs_da_brelse(NULL, bp);
bp = NULL;
} else if (cursor->hashval <=
be32_to_cpu(leaf->entries[0].hashval)) {
- xfs_attr_trace_l_cl("maybe wrong blk",
- context, leaf);
+ trace_xfs_attr_list_wrong_blk(context);
xfs_da_brelse(NULL, bp);
bp = NULL;
}
break;
default:
- xfs_attr_trace_l_c("wrong blk - ??", context);
+ trace_xfs_attr_list_wrong_blk(context);
xfs_da_brelse(NULL, bp);
bp = NULL;
}
@@ -1919,8 +1912,8 @@ xfs_attr_node_list(xfs_attr_list_context_t *context)
if (cursor->hashval
<= be32_to_cpu(btree->hashval)) {
cursor->blkno = be32_to_cpu(btree->before);
- xfs_attr_trace_l_cb("descending",
- context, btree);
+ trace_xfs_attr_list_node_descend(context,
+ btree);
break;
}
}
@@ -2270,85 +2263,3 @@ xfs_attr_rmtval_remove(xfs_da_args_t *args)
}
return(0);
}
-
-#if defined(XFS_ATTR_TRACE)
-/*
- * Add a trace buffer entry for an attr_list context structure.
- */
-void
-xfs_attr_trace_l_c(char *where, struct xfs_attr_list_context *context)
-{
- xfs_attr_trace_enter(XFS_ATTR_KTRACE_L_C, where, context,
- (__psunsigned_t)NULL,
- (__psunsigned_t)NULL,
- (__psunsigned_t)NULL);
-}
-
-/*
- * Add a trace buffer entry for a context structure and a Btree node.
- */
-void
-xfs_attr_trace_l_cn(char *where, struct xfs_attr_list_context *context,
- struct xfs_da_intnode *node)
-{
- xfs_attr_trace_enter(XFS_ATTR_KTRACE_L_CN, where, context,
- (__psunsigned_t)be16_to_cpu(node->hdr.count),
- (__psunsigned_t)be32_to_cpu(node->btree[0].hashval),
- (__psunsigned_t)be32_to_cpu(node->btree[
- be16_to_cpu(node->hdr.count)-1].hashval));
-}
-
-/*
- * Add a trace buffer entry for a context structure and a Btree element.
- */
-void
-xfs_attr_trace_l_cb(char *where, struct xfs_attr_list_context *context,
- struct xfs_da_node_entry *btree)
-{
- xfs_attr_trace_enter(XFS_ATTR_KTRACE_L_CB, where, context,
- (__psunsigned_t)be32_to_cpu(btree->hashval),
- (__psunsigned_t)be32_to_cpu(btree->before),
- (__psunsigned_t)NULL);
-}
-
-/*
- * Add a trace buffer entry for a context structure and a leaf block.
- */
-void
-xfs_attr_trace_l_cl(char *where, struct xfs_attr_list_context *context,
- struct xfs_attr_leafblock *leaf)
-{
- xfs_attr_trace_enter(XFS_ATTR_KTRACE_L_CL, where, context,
- (__psunsigned_t)be16_to_cpu(leaf->hdr.count),
- (__psunsigned_t)be32_to_cpu(leaf->entries[0].hashval),
- (__psunsigned_t)be32_to_cpu(leaf->entries[
- be16_to_cpu(leaf->hdr.count)-1].hashval));
-}
-
-/*
- * Add a trace buffer entry for the arguments given to the routine,
- * generic form.
- */
-void
-xfs_attr_trace_enter(int type, char *where,
- struct xfs_attr_list_context *context,
- __psunsigned_t a13, __psunsigned_t a14,
- __psunsigned_t a15)
-{
- ASSERT(xfs_attr_trace_buf);
- ktrace_enter(xfs_attr_trace_buf, (void *)((__psunsigned_t)type),
- (void *)((__psunsigned_t)where),
- (void *)((__psunsigned_t)context->dp),
- (void *)((__psunsigned_t)context->cursor->hashval),
- (void *)((__psunsigned_t)context->cursor->blkno),
- (void *)((__psunsigned_t)context->cursor->offset),
- (void *)((__psunsigned_t)context->alist),
- (void *)((__psunsigned_t)context->bufsize),
- (void *)((__psunsigned_t)context->count),
- (void *)((__psunsigned_t)context->firstu),
- NULL,
- (void *)((__psunsigned_t)context->dupcnt),
- (void *)((__psunsigned_t)context->flags),
- (void *)a13, (void *)a14, (void *)a15);
-}
-#endif /* XFS_ATTR_TRACE */
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