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svcrdma: Clean up chunk tracepoints

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We already have trace_svcrdma_decode_rseg(), which records each
ingress Read segment. Instead of reporting those again when they
are about to be posted as RDMA Reads, let's fire one tracepoint
before posting each type of chunk.

So we'll get:

        nfsd-1998  [002]   321.666615: svcrdma_decode_rseg:  cq.id=4 cid=42 segno=0 position=0 192@0x013ca9ebfae14000:0xb0010b05
        nfsd-1998  [002]   321.666615: svcrdma_decode_rseg:  cq.id=4 cid=42 segno=1 position=0 7688@0x013ca9ebf914e000:0xb0010a05
        nfsd-1998  [002]   321.666615: svcrdma_decode_rseg:  cq.id=4 cid=42 segno=2 position=0 28@0x013ca9ebfae15000:0xb0010905
        nfsd-1998  [002]   321.666622: svcrdma_decode_rqst:  cq.id=4 cid=42 xid=0x013ca9eb vers=1 credits=128 proc=RDMA_NOMSG hdrlen=100

        nfsd-1998  [002]   321.666642: svcrdma_post_read_chunk: cq.id=3 cid=112 sqecount=3

kworker/2:1H-221   [002]   321.673949: svcrdma_wc_read:      cq.id=3 cid=112 status=SUCCESS (0/0x0)

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever
2020-06-11 13:28:28 -04:00
parent 7954c8503b
commit b704be09dc
3 changed files with 26 additions and 113 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
net/sunrpc/xprtrdma/svc_rdma_rw.c
View File

@@ -358,7 +358,6 @@ static int svc_rdma_post_chunk_ctxt(struct svc_rdma_chunk_ctxt *cc)
do {
if (atomic_sub_return(cc->cc_sqecount,
&rdma->sc_sq_avail) > 0) {
trace_svcrdma_post_chunk(&cc->cc_cid, cc->cc_sqecount);
ret = ib_post_send(rdma->sc_qp, first_wr, &bad_wr);
if (ret)
break;
@@ -470,8 +469,6 @@ svc_rdma_build_writes(struct svc_rdma_write_info *info,
if (ret < 0)
return -EIO;
trace_svcrdma_send_wseg(seg->rs_handle, write_len, offset);
list_add(&ctxt->rw_list, &cc->cc_rwctxts);
cc->cc_sqecount += ret;
if (write_len == seg->rs_length - info->wi_seg_off) {
@@ -590,21 +587,22 @@ int svc_rdma_send_write_chunk(struct svcxprt_rdma *rdma,
const struct xdr_buf *xdr)
{
struct svc_rdma_write_info *info;
struct svc_rdma_chunk_ctxt *cc;
int ret;
info = svc_rdma_write_info_alloc(rdma, chunk);
if (!info)
return -ENOMEM;
cc = &info->wi_cc;
ret = svc_rdma_xb_write(xdr, info);
if (ret != xdr->len)
goto out_err;
ret = svc_rdma_post_chunk_ctxt(&info->wi_cc);
trace_svcrdma_post_write_chunk(&cc->cc_cid, cc->cc_sqecount);
ret = svc_rdma_post_chunk_ctxt(cc);
if (ret < 0)
goto out_err;
trace_svcrdma_send_write_chunk(xdr->page_len);
return xdr->len;
out_err:
@@ -630,6 +628,7 @@ int svc_rdma_send_reply_chunk(struct svcxprt_rdma *rdma,
const struct xdr_buf *xdr)
{
struct svc_rdma_write_info *info;
struct svc_rdma_chunk_ctxt *cc;
struct svc_rdma_chunk *chunk;
int ret;
@@ -640,17 +639,18 @@ int svc_rdma_send_reply_chunk(struct svcxprt_rdma *rdma,
info = svc_rdma_write_info_alloc(rdma, chunk);
if (!info)
return -ENOMEM;
cc = &info->wi_cc;
ret = pcl_process_nonpayloads(&rctxt->rc_write_pcl, xdr,
svc_rdma_xb_write, info);
if (ret < 0)
goto out_err;
ret = svc_rdma_post_chunk_ctxt(&info->wi_cc);
trace_svcrdma_post_reply_chunk(&cc->cc_cid, cc->cc_sqecount);
ret = svc_rdma_post_chunk_ctxt(cc);
if (ret < 0)
goto out_err;
trace_svcrdma_send_reply_chunk(xdr->len);
return xdr->len;
out_err:
@@ -737,10 +737,8 @@ static int svc_rdma_build_read_chunk(struct svc_rqst *rqstp,
if (ret < 0)
break;
trace_svcrdma_send_rseg(handle, length, offset);
info->ri_chunklen += length;
}
return ret;
}
@@ -762,8 +760,6 @@ static int svc_rdma_build_normal_read_chunk(struct svc_rqst *rqstp,
if (ret < 0)
goto out;
trace_svcrdma_send_read_chunk(info->ri_chunklen, info->ri_position);
head->rc_hdr_count = 0;
/* Split the Receive buffer between the head and tail
@@ -818,8 +814,6 @@ static int svc_rdma_build_pz_read_chunk(struct svc_rqst *rqstp,
if (ret < 0)
goto out;
trace_svcrdma_send_pzr(info->ri_chunklen);
head->rc_arg.len += info->ri_chunklen;
head->rc_arg.buflen += info->ri_chunklen;
@@ -876,6 +870,7 @@ int svc_rdma_recv_read_chunk(struct svcxprt_rdma *rdma, struct svc_rqst *rqstp,
struct svc_rdma_recv_ctxt *head, __be32 *p)
{
struct svc_rdma_read_info *info;
struct svc_rdma_chunk_ctxt *cc;
int ret;
/* The request (with page list) is constructed in
@@ -893,6 +888,7 @@ int svc_rdma_recv_read_chunk(struct svcxprt_rdma *rdma, struct svc_rqst *rqstp,
info = svc_rdma_read_info_alloc(rdma);
if (!info)
return -ENOMEM;
cc = &info->ri_cc;
info->ri_readctxt = head;
info->ri_pageno = 0;
info->ri_pageoff = 0;
@@ -905,7 +901,8 @@ int svc_rdma_recv_read_chunk(struct svcxprt_rdma *rdma, struct svc_rqst *rqstp,
if (ret < 0)
goto out_err;
ret = svc_rdma_post_chunk_ctxt(&info->ri_cc);
trace_svcrdma_post_read_chunk(&cc->cc_cid, cc->cc_sqecount);
ret = svc_rdma_post_chunk_ctxt(cc);
if (ret < 0)
goto out_err;
svc_rdma_save_io_pages(rqstp, 0, head->rc_page_count);