From: John Hammond <jhammond@tacc.utexas.edu>
Date: Thu, 14 Jul 2011 00:48:40 +0000 (-0500)
Subject: LU-333: Make read_bytes in llite/*/stats report bytes read.
X-Git-Tag: 2.1.0-RC0~27
X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=commitdiff_plain;h=37eeb0ffd0325c5a3c426d6ab0e72ef6da84db99;ds=sidebyside

LU-333: Make read_bytes in llite/*/stats report bytes read.

Move ll_stats_ops_tally(..., LPROC_LL_{READ,WRITE}_BYTES, ...) from
vvp_io_init() to the end of ll_file_io_generic(), and tally by the
actual number of bytes read rather than the number requested.

Test 127b, client stats are correctly tallied with this patch.

Change-Id: Icad0bc09630b8c1775f2ec59326902aa88215498
Signed-off-by: John Hammond <jhammond@tacc.utexas.edu>
Signed-off-by: Richard Henwood <rhenwood@whamcloud.com>
Reviewed-on: http://review.whamcloud.com/1094
Tested-by: Hudson
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
---

diff --git a/lustre/llite/file.c b/lustre/llite/file.c
index 4ca1911..93d4f47 100644
--- a/lustre/llite/file.c
+++ b/lustre/llite/file.c
@@ -891,8 +891,21 @@ static ssize_t ll_file_io_generic(const struct lu_env *env,
         GOTO(out, result);
 out:
         cl_io_fini(env, io);
-        if (iot == CIT_WRITE)
-                lli->lli_write_rc = result < 0 ? : 0;
+
+        if (iot == CIT_READ) {
+                if (result >= 0)
+                        ll_stats_ops_tally(ll_i2sbi(file->f_dentry->d_inode),
+                                           LPROC_LL_READ_BYTES, result);
+        } else if (iot == CIT_WRITE) {
+                if (result >= 0) {
+                        ll_stats_ops_tally(ll_i2sbi(file->f_dentry->d_inode),
+                                           LPROC_LL_WRITE_BYTES, result);
+                        lli->lli_write_rc = 0;
+                } else {
+                        lli->lli_write_rc = result;
+                }
+        }
+
         return result;
 }
 
diff --git a/lustre/llite/vvp_io.c b/lustre/llite/vvp_io.c
index 62b0072..32a8905 100644
--- a/lustre/llite/vvp_io.c
+++ b/lustre/llite/vvp_io.c
@@ -1076,12 +1076,9 @@ int vvp_io_init(const struct lu_env *env, struct cl_object *obj,
         vio->cui_ra_window_set = 0;
         result = 0;
         if (io->ci_type == CIT_READ || io->ci_type == CIT_WRITE) {
-                int    op;
                 size_t count;
 
                 count = io->u.ci_rw.crw_count;
-                op    = io->ci_type == CIT_READ ?
-                        LPROC_LL_READ_BYTES : LPROC_LL_WRITE_BYTES;
                 /* "If nbyte is 0, read() will return 0 and have no other
                  *  results."  -- Single Unix Spec */
                 if (count == 0)
@@ -1089,7 +1086,6 @@ int vvp_io_init(const struct lu_env *env, struct cl_object *obj,
                 else {
                         cio->cui_tot_count = count;
                         cio->cui_tot_nrsegs = 0;
-                        ll_stats_ops_tally(sbi, op, count);
                 }
         } else if (io->ci_type == CIT_SETATTR) {
                 if (cl_io_is_trunc(io))
diff --git a/lustre/tests/sanity.sh b/lustre/tests/sanity.sh
index 750a825..38fcd12 100644
--- a/lustre/tests/sanity.sh
+++ b/lustre/tests/sanity.sh
@@ -6258,7 +6258,7 @@ test_126() { # bug 12829/13455
 }
 run_test 126 "check that the fsgid provided by the client is taken into account"
 
-test_127() { # bug 15521
+test_127a() { # bug 15521
         $SETSTRIPE -i 0 -c 1 $DIR/$tfile || error "setstripe failed"
         $LCTL set_param osc.*.stats=0
         FSIZE=$((2048 * 1024))
@@ -6294,7 +6294,47 @@ test_127() { # bug 15521
         [ "$read_bytes" != 0 ] || error "no read done"
         [ "$write_bytes" != 0 ] || error "no write done"
 }
-run_test 127 "verify the client stats are sane"
+run_test 127a "verify the client stats are sane"
+
+test_127b() { # bug LU-333
+        $LCTL set_param llite.*.stats=0
+        FSIZE=65536 # sized fixed to match PAGE_SIZE for most clients
+        # perform 2 reads and writes so MAX is different from SUM.
+        dd if=/dev/zero of=$DIR/$tfile bs=$FSIZE count=1
+        dd if=/dev/zero of=$DIR/$tfile bs=$FSIZE count=1
+        cancel_lru_locks osc
+        dd if=$DIR/$tfile of=/dev/null bs=$FSIZE count=1
+        dd if=$DIR/$tfile of=/dev/null bs=$FSIZE count=1
+
+        $LCTL get_param llite.*.stats | grep samples > $TMP/${tfile}.tmp
+        while read NAME COUNT SAMP UNIT MIN MAX SUM SUMSQ; do
+                echo "got $COUNT $NAME"
+                eval $NAME=$COUNT || error "Wrong proc format"
+
+        case $NAME in
+                read_bytes)
+                        [ $COUNT -ne 2 ] && error "count is not 2: $COUNT"
+                        [ $MIN -ne $FSIZE ] && error "min is not $FSIZE: $MIN"
+                        [ $MAX -ne $FSIZE ] && error "max is incorrect: $MAX"
+                        [ $SUM -ne $((FSIZE * 2)) ] && error "sum is wrong: $SUM"
+                        ;;
+                write_bytes)
+                        [ $COUNT -ne 2 ] && error "count is not 2: $COUNT"
+                        [ $MIN -ne $FSIZE ] && error "min is not $FSIZE: $MIN"
+                        [ $MAX -ne $FSIZE ] && error "max is incorrect: $MAX"
+                        [ $SUM -ne $((FSIZE * 2)) ] && error "sum is wrong: $SUM"
+                        ;;
+                        *) ;;
+                esac
+        done < $TMP/${tfile}.tmp
+
+        #check that we actually got some stats
+        [ "$read_bytes" ] || error "Missing read_bytes stats"
+        [ "$write_bytes" ] || error "Missing write_bytes stats"
+        [ "$read_bytes" != 0 ] || error "no read done"
+        [ "$write_bytes" != 0 ] || error "no write done"
+}
+run_test 127b "verify the llite client stats are sane"
 
 test_128() { # bug 15212
 	touch $DIR/$tfile