[PATCH net-next V2 0/2] pktgen new parameters

[PATCH net-next V2 0/2] pktgen new parameters

[Tariq Toukan]

Hi Dave,

This patchset adds two parameters to the pktgen scripts.
* The first patch adds a parameter to control the number of
  packets sent by every pktgen thread.
* The second patch adds a parameter to control the index of
  first thread, instead of always starting from cpu 0.

Series generated against net-next commit:
f7aec129a356 rxrpc: Cache the congestion window setting

Thanks,
Tariq.

V2:
* rebased to latest net-next.
* per Jesper's comments on Patch 2, fixed $F_THREAD description
  and $L_THREAD evaluation.

Tariq Toukan (2):
  pktgen: Specify num packets per thread
  pktgen: Specify the index of first thread

 samples/pktgen/README.rst                          |  2 ++
 samples/pktgen/parameters.sh                       | 25 ++++++++++++++++------
 .../pktgen/pktgen_bench_xmit_mode_netif_receive.sh |  6 +++---
 .../pktgen/pktgen_bench_xmit_mode_queue_xmit.sh    |  6 +++---
 samples/pktgen/pktgen_sample01_simple.sh           |  2 +-
 samples/pktgen/pktgen_sample02_multiqueue.sh       |  7 +++---
 .../pktgen/pktgen_sample03_burst_single_flow.sh    |  6 +++---
 samples/pktgen/pktgen_sample04_many_flows.sh       |  6 +++---
 samples/pktgen/pktgen_sample05_flow_per_thread.sh  |  6 +++---
 9 files changed, 41 insertions(+), 25 deletions(-)

-- 
1.8.3.1

[PATCH net-next V2 1/2] pktgen: Specify num packets per thread

[Tariq Toukan]

Use -n <num>, to specify the number of packets every
thread sends.
Zero means indefinitely.

Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
---
 samples/pktgen/README.rst                              | 1 +
 samples/pktgen/parameters.sh                           | 7 ++++++-
 samples/pktgen/pktgen_bench_xmit_mode_netif_receive.sh | 2 +-
 samples/pktgen/pktgen_bench_xmit_mode_queue_xmit.sh    | 2 +-
 samples/pktgen/pktgen_sample01_simple.sh               | 2 +-
 samples/pktgen/pktgen_sample02_multiqueue.sh           | 3 ++-
 samples/pktgen/pktgen_sample03_burst_single_flow.sh    | 2 +-
 samples/pktgen/pktgen_sample04_many_flows.sh           | 2 +-
 samples/pktgen/pktgen_sample05_flow_per_thread.sh      | 2 +-
 9 files changed, 15 insertions(+), 8 deletions(-)

diff --git a/samples/pktgen/README.rst b/samples/pktgen/README.rst
index 8365c4e5c513..c018d67da1a1 100644
--- a/samples/pktgen/README.rst
+++ b/samples/pktgen/README.rst
@@ -22,6 +22,7 @@ across the sample scripts.  Usage example is printed on errors::
   -m : ($DST_MAC)   destination MAC-addr
   -t : ($THREADS)   threads to start
   -c : ($SKB_CLONE) SKB clones send before alloc new SKB
+  -n : ($COUNT)     num messages to send per thread, 0 means indefinitely
   -b : ($BURST)     HW level bursting of SKBs
   -v : ($VERBOSE)   verbose
   -x : ($DEBUG)     debug
diff --git a/samples/pktgen/parameters.sh b/samples/pktgen/parameters.sh
index f70ea7dd5660..036147594a20 100644
--- a/samples/pktgen/parameters.sh
+++ b/samples/pktgen/parameters.sh
@@ -11,6 +11,7 @@ function usage() {
     echo "  -m : (\$DST_MAC)   destination MAC-addr"
     echo "  -t : (\$THREADS)   threads to start"
     echo "  -c : (\$SKB_CLONE) SKB clones send before alloc new SKB"
+    echo "  -n : (\$COUNT)     num messages to send per thread, 0 means indefinitely"
     echo "  -b : (\$BURST)     HW level bursting of SKBs"
     echo "  -v : (\$VERBOSE)   verbose"
     echo "  -x : (\$DEBUG)     debug"
@@ -20,7 +21,7 @@ function usage() {
 
 ##  --- Parse command line arguments / parameters ---
 ## echo "Commandline options:"
-while getopts "s:i:d:m:t:c:b:vxh6" option; do
+while getopts "s:i:d:m:t:c:n:b:vxh6" option; do
     case $option in
         i) # interface
           export DEV=$OPTARG
@@ -48,6 +49,10 @@ while getopts "s:i:d:m:t:c:b:vxh6" option; do
 	  export CLONE_SKB=$OPTARG
 	  info "CLONE_SKB=$CLONE_SKB"
           ;;
+        n)
+	  export COUNT=$OPTARG
+	  info "COUNT=$COUNT"
+          ;;
         b)
 	  export BURST=$OPTARG
 	  info "SKB bursting: BURST=$BURST"
diff --git a/samples/pktgen/pktgen_bench_xmit_mode_netif_receive.sh b/samples/pktgen/pktgen_bench_xmit_mode_netif_receive.sh
index f3e1bedfd77f..d2694a12de61 100755
--- a/samples/pktgen/pktgen_bench_xmit_mode_netif_receive.sh
+++ b/samples/pktgen/pktgen_bench_xmit_mode_netif_receive.sh
@@ -39,10 +39,10 @@ if [ -z "$DEST_IP" ]; then
 fi
 [ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff"
 [ -z "$BURST" ] && BURST=1024
+[ -z "$COUNT" ] && COUNT="10000000" # Zero means indefinitely
 
 # Base Config
 DELAY="0"        # Zero means max speed
-COUNT="10000000" # Zero means indefinitely
 
 # General cleanup everything since last run
 pg_ctrl "reset"
diff --git a/samples/pktgen/pktgen_bench_xmit_mode_queue_xmit.sh b/samples/pktgen/pktgen_bench_xmit_mode_queue_xmit.sh
index cc102e923241..43604c2db726 100755
--- a/samples/pktgen/pktgen_bench_xmit_mode_queue_xmit.sh
+++ b/samples/pktgen/pktgen_bench_xmit_mode_queue_xmit.sh
@@ -22,10 +22,10 @@ fi
 if [[ -n "$BURST" ]]; then
     err 1 "Bursting not supported for this mode"
 fi
+[ -z "$COUNT" ] && COUNT="10000000" # Zero means indefinitely
 
 # Base Config
 DELAY="0"        # Zero means max speed
-COUNT="10000000" # Zero means indefinitely
 
 # General cleanup everything since last run
 pg_ctrl "reset"
diff --git a/samples/pktgen/pktgen_sample01_simple.sh b/samples/pktgen/pktgen_sample01_simple.sh
index 29ef4ba50796..35b7fe34bda2 100755
--- a/samples/pktgen/pktgen_sample01_simple.sh
+++ b/samples/pktgen/pktgen_sample01_simple.sh
@@ -20,10 +20,10 @@ fi
 [ -z "$CLONE_SKB" ] && CLONE_SKB="0"
 # Example enforce param "-m" for dst_mac
 [ -z "$DST_MAC" ] && usage && err 2 "Must specify -m dst_mac"
+[ -z "$COUNT" ]   && COUNT="100000" # Zero means indefinitely
 
 # Base Config
 DELAY="0"        # Zero means max speed
-COUNT="100000"   # Zero means indefinitely
 
 # Flow variation random source port between min and max
 UDP_MIN=9
diff --git a/samples/pktgen/pktgen_sample02_multiqueue.sh b/samples/pktgen/pktgen_sample02_multiqueue.sh
index c88a161d3e6f..164194d1c79b 100755
--- a/samples/pktgen/pktgen_sample02_multiqueue.sh
+++ b/samples/pktgen/pktgen_sample02_multiqueue.sh
@@ -13,9 +13,10 @@ root_check_run_with_sudo "$@"
 # Required param: -i dev in $DEV
 source ${basedir}/parameters.sh
 
+[ -z "$COUNT" ] && COUNT="100000" # Zero means indefinitely
+
 # Base Config
 DELAY="0"        # Zero means max speed
-COUNT="100000"   # Zero means indefinitely
 [ -z "$CLONE_SKB" ] && CLONE_SKB="0"
 
 # Flow variation random source port between min and max
diff --git a/samples/pktgen/pktgen_sample03_burst_single_flow.sh b/samples/pktgen/pktgen_sample03_burst_single_flow.sh
index 80cf8f5ba6b2..e03dd4cd05ce 100755
--- a/samples/pktgen/pktgen_sample03_burst_single_flow.sh
+++ b/samples/pktgen/pktgen_sample03_burst_single_flow.sh
@@ -31,10 +31,10 @@ fi
 [ -z "$DST_MAC" ]   && DST_MAC="90:e2:ba:ff:ff:ff"
 [ -z "$BURST" ]     && BURST=32
 [ -z "$CLONE_SKB" ] && CLONE_SKB="100000"
+[ -z "$COUNT" ]     && COUNT="0" # Zero means indefinitely
 
 # Base Config
 DELAY="0"  # Zero means max speed
-COUNT="0"  # Zero means indefinitely
 
 # General cleanup everything since last run
 pg_ctrl "reset"
diff --git a/samples/pktgen/pktgen_sample04_many_flows.sh b/samples/pktgen/pktgen_sample04_many_flows.sh
index f60412e445bb..0fc72d2bcd31 100755
--- a/samples/pktgen/pktgen_sample04_many_flows.sh
+++ b/samples/pktgen/pktgen_sample04_many_flows.sh
@@ -15,6 +15,7 @@ source ${basedir}/parameters.sh
 [ -z "$DEST_IP" ]   && DEST_IP="198.18.0.42"
 [ -z "$DST_MAC" ]   && DST_MAC="90:e2:ba:ff:ff:ff"
 [ -z "$CLONE_SKB" ] && CLONE_SKB="0"
+[ -z "$COUNT" ]     && COUNT="0" # Zero means indefinitely
 
 # NOTICE:  Script specific settings
 # =======
@@ -26,7 +27,6 @@ source ${basedir}/parameters.sh
 
 # Base Config
 DELAY="0"  # Zero means max speed
-COUNT="0"  # Zero means indefinitely
 
 if [[ -n "$BURST" ]]; then
     err 1 "Bursting not supported for this mode"
diff --git a/samples/pktgen/pktgen_sample05_flow_per_thread.sh b/samples/pktgen/pktgen_sample05_flow_per_thread.sh
index 32ad818e2829..f4fb79409fd0 100755
--- a/samples/pktgen/pktgen_sample05_flow_per_thread.sh
+++ b/samples/pktgen/pktgen_sample05_flow_per_thread.sh
@@ -20,11 +20,11 @@ source ${basedir}/parameters.sh
 [ -z "$DST_MAC" ]   && DST_MAC="90:e2:ba:ff:ff:ff"
 [ -z "$CLONE_SKB" ] && CLONE_SKB="0"
 [ -z "$BURST" ]     && BURST=32
+[ -z "$COUNT" ]     && COUNT="0" # Zero means indefinitely
 
 
 # Base Config
 DELAY="0"  # Zero means max speed
-COUNT="0"  # Zero means indefinitely
 
 # General cleanup everything since last run
 pg_ctrl "reset"
-- 
1.8.3.1

[PATCH net-next V2 2/2] pktgen: Specify the index of first thread

[Tariq Toukan]

Use "-f <num>", to specify the index of the first
sender thread.
In default first thread is #0.

Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
---
 samples/pktgen/README.rst                            |  1 +
 samples/pktgen/parameters.sh                         | 20 ++++++++++++++------
 .../pktgen/pktgen_bench_xmit_mode_netif_receive.sh   |  4 ++--
 samples/pktgen/pktgen_bench_xmit_mode_queue_xmit.sh  |  4 ++--
 samples/pktgen/pktgen_sample02_multiqueue.sh         |  4 ++--
 samples/pktgen/pktgen_sample03_burst_single_flow.sh  |  4 ++--
 samples/pktgen/pktgen_sample04_many_flows.sh         |  4 ++--
 samples/pktgen/pktgen_sample05_flow_per_thread.sh    |  4 ++--
 8 files changed, 27 insertions(+), 18 deletions(-)

diff --git a/samples/pktgen/README.rst b/samples/pktgen/README.rst
index c018d67da1a1..ff8929da61c5 100644
--- a/samples/pktgen/README.rst
+++ b/samples/pktgen/README.rst
@@ -21,6 +21,7 @@ across the sample scripts.  Usage example is printed on errors::
   -d : ($DEST_IP)   destination IP
   -m : ($DST_MAC)   destination MAC-addr
   -t : ($THREADS)   threads to start
+  -f : ($F_THREAD)  index of first thread (zero indexed CPU number)
   -c : ($SKB_CLONE) SKB clones send before alloc new SKB
   -n : ($COUNT)     num messages to send per thread, 0 means indefinitely
   -b : ($BURST)     HW level bursting of SKBs
diff --git a/samples/pktgen/parameters.sh b/samples/pktgen/parameters.sh
index 036147594a20..3a6244d5f47a 100644
--- a/samples/pktgen/parameters.sh
+++ b/samples/pktgen/parameters.sh
@@ -10,6 +10,7 @@ function usage() {
     echo "  -d : (\$DEST_IP)   destination IP"
     echo "  -m : (\$DST_MAC)   destination MAC-addr"
     echo "  -t : (\$THREADS)   threads to start"
+    echo "  -f : (\$F_THREAD)  index of first thread (zero indexed CPU number)"
     echo "  -c : (\$SKB_CLONE) SKB clones send before alloc new SKB"
     echo "  -n : (\$COUNT)     num messages to send per thread, 0 means indefinitely"
     echo "  -b : (\$BURST)     HW level bursting of SKBs"
@@ -21,7 +22,7 @@ function usage() {
 
 ##  --- Parse command line arguments / parameters ---
 ## echo "Commandline options:"
-while getopts "s:i:d:m:t:c:n:b:vxh6" option; do
+while getopts "s:i:d:m:f:t:c:n:b:vxh6" option; do
     case $option in
         i) # interface
           export DEV=$OPTARG
@@ -39,11 +40,13 @@ while getopts "s:i:d:m:t:c:n:b:vxh6" option; do
           export DST_MAC=$OPTARG
 	  info "Destination MAC set to: DST_MAC=$DST_MAC"
           ;;
+        f)
+	  export F_THREAD=$OPTARG
+	  info "Index of first thread (zero indexed CPU number): $F_THREAD"
+          ;;
         t)
 	  export THREADS=$OPTARG
-          export CPU_THREADS=$OPTARG
-	  let "CPU_THREADS -= 1"
-	  info "Number of threads to start: $THREADS (0 to $CPU_THREADS)"
+	  info "Number of threads to start: $THREADS"
           ;;
         c)
 	  export CLONE_SKB=$OPTARG
@@ -82,12 +85,17 @@ if [ -z "$PKT_SIZE" ]; then
     info "Default packet size set to: set to: $PKT_SIZE bytes"
 fi
 
+if [ -z "$F_THREAD" ]; then
+    # First thread (F_THREAD) reference the zero indexed CPU number
+    export F_THREAD=0
+fi
+
 if [ -z "$THREADS" ]; then
-    # Zero CPU threads means one thread, because CPU numbers are zero indexed
-    export CPU_THREADS=0
     export THREADS=1
 fi
 
+export L_THREAD=$(( THREADS + F_THREAD - 1 ))
+
 if [ -z "$DEV" ]; then
     usage
     err 2 "Please specify output device"
diff --git a/samples/pktgen/pktgen_bench_xmit_mode_netif_receive.sh b/samples/pktgen/pktgen_bench_xmit_mode_netif_receive.sh
index d2694a12de61..e5bfe759a0fb 100755
--- a/samples/pktgen/pktgen_bench_xmit_mode_netif_receive.sh
+++ b/samples/pktgen/pktgen_bench_xmit_mode_netif_receive.sh
@@ -48,7 +48,7 @@ DELAY="0"        # Zero means max speed
 pg_ctrl "reset"
 
 # Threads are specified with parameter -t value in $THREADS
-for ((thread = 0; thread < $THREADS; thread++)); do
+for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
     # The device name is extended with @name, using thread number to
     # make then unique, but any name will do.
     dev=${DEV}@${thread}
@@ -81,7 +81,7 @@ pg_ctrl "start"
 echo "Done" >&2
 
 # Print results
-for ((thread = 0; thread < $THREADS; thread++)); do
+for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
     dev=${DEV}@${thread}
     echo "Device: $dev"
     cat /proc/net/pktgen/$dev | grep -A2 "Result:"
diff --git a/samples/pktgen/pktgen_bench_xmit_mode_queue_xmit.sh b/samples/pktgen/pktgen_bench_xmit_mode_queue_xmit.sh
index 43604c2db726..1ad878e95539 100755
--- a/samples/pktgen/pktgen_bench_xmit_mode_queue_xmit.sh
+++ b/samples/pktgen/pktgen_bench_xmit_mode_queue_xmit.sh
@@ -31,7 +31,7 @@ DELAY="0"        # Zero means max speed
 pg_ctrl "reset"
 
 # Threads are specified with parameter -t value in $THREADS
-for ((thread = 0; thread < $THREADS; thread++)); do
+for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
     # The device name is extended with @name, using thread number to
     # make then unique, but any name will do.
     dev=${DEV}@${thread}
@@ -61,7 +61,7 @@ pg_ctrl "start"
 echo "Done" >&2
 
 # Print results
-for ((thread = 0; thread < $THREADS; thread++)); do
+for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
     dev=${DEV}@${thread}
     echo "Device: $dev"
     cat /proc/net/pktgen/$dev | grep -A2 "Result:"
diff --git a/samples/pktgen/pktgen_sample02_multiqueue.sh b/samples/pktgen/pktgen_sample02_multiqueue.sh
index 164194d1c79b..cbdd3e2bceff 100755
--- a/samples/pktgen/pktgen_sample02_multiqueue.sh
+++ b/samples/pktgen/pktgen_sample02_multiqueue.sh
@@ -33,7 +33,7 @@ fi
 pg_ctrl "reset"
 
 # Threads are specified with parameter -t value in $THREADS
-for ((thread = 0; thread < $THREADS; thread++)); do
+for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
     # The device name is extended with @name, using thread number to
     # make then unique, but any name will do.
     dev=${DEV}@${thread}
@@ -71,7 +71,7 @@ pg_ctrl "start"
 echo "Done" >&2
 
 # Print results
-for ((thread = 0; thread < $THREADS; thread++)); do
+for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
     dev=${DEV}@${thread}
     echo "Device: $dev"
     cat /proc/net/pktgen/$dev | grep -A2 "Result:"
diff --git a/samples/pktgen/pktgen_sample03_burst_single_flow.sh b/samples/pktgen/pktgen_sample03_burst_single_flow.sh
index e03dd4cd05ce..8d26e0ca683d 100755
--- a/samples/pktgen/pktgen_sample03_burst_single_flow.sh
+++ b/samples/pktgen/pktgen_sample03_burst_single_flow.sh
@@ -40,7 +40,7 @@ DELAY="0"  # Zero means max speed
 pg_ctrl "reset"
 
 # Threads are specified with parameter -t value in $THREADS
-for ((thread = 0; thread < $THREADS; thread++)); do
+for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
     dev=${DEV}@${thread}
 
     # Add remove all other devices and add_device $dev to thread
@@ -71,7 +71,7 @@ done
 # Run if user hits control-c
 function control_c() {
     # Print results
-    for ((thread = 0; thread < $THREADS; thread++)); do
+    for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
 	dev=${DEV}@${thread}
 	echo "Device: $dev"
 	cat /proc/net/pktgen/$dev | grep -A2 "Result:"
diff --git a/samples/pktgen/pktgen_sample04_many_flows.sh b/samples/pktgen/pktgen_sample04_many_flows.sh
index 0fc72d2bcd31..497fb7520464 100755
--- a/samples/pktgen/pktgen_sample04_many_flows.sh
+++ b/samples/pktgen/pktgen_sample04_many_flows.sh
@@ -36,7 +36,7 @@ fi
 pg_ctrl "reset"
 
 # Threads are specified with parameter -t value in $THREADS
-for ((thread = 0; thread < $THREADS; thread++)); do
+for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
     dev=${DEV}@${thread}
 
     # Add remove all other devices and add_device $dev to thread
@@ -78,7 +78,7 @@ done
 # Run if user hits control-c
 function print_result() {
     # Print results
-    for ((thread = 0; thread < $THREADS; thread++)); do
+    for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
 	dev=${DEV}@${thread}
 	echo "Device: $dev"
 	cat /proc/net/pktgen/$dev | grep -A2 "Result:"
diff --git a/samples/pktgen/pktgen_sample05_flow_per_thread.sh b/samples/pktgen/pktgen_sample05_flow_per_thread.sh
index f4fb79409fd0..ac9cfd6b2c0a 100755
--- a/samples/pktgen/pktgen_sample05_flow_per_thread.sh
+++ b/samples/pktgen/pktgen_sample05_flow_per_thread.sh
@@ -30,7 +30,7 @@ DELAY="0"  # Zero means max speed
 pg_ctrl "reset"
 
 # Threads are specified with parameter -t value in $THREADS
-for ((thread = 0; thread < $THREADS; thread++)); do
+for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
     dev=${DEV}@${thread}
 
     # Add remove all other devices and add_device $dev to thread
@@ -66,7 +66,7 @@ done
 # Run if user hits control-c
 function print_result() {
     # Print results
-    for ((thread = 0; thread < $THREADS; thread++)); do
+    for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
 	dev=${DEV}@${thread}
 	echo "Device: $dev"
 	cat /proc/net/pktgen/$dev | grep -A2 "Result:"
-- 
1.8.3.1

Re: [PATCH net-next V2 1/2] pktgen: Specify num packets per thread

[Jesper Dangaard Brouer]

On Thu, 15 Jun 2017 19:07:21 +0300
Tariq Toukan <tariqt@mellanox.com> wrote:

> Use -n <num>, to specify the number of packets every
> thread sends.
> Zero means indefinitely.
> 
> Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
> Cc: Jesper Dangaard Brouer <brouer@redhat.com>

Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>

-- 
Best regards,
  Jesper Dangaard Brouer
  MSc.CS, Principal Kernel Engineer at Red Hat
  LinkedIn: http://www.linkedin.com/in/brouer

Re: [PATCH net-next V2 2/2] pktgen: Specify the index of first thread

[Jesper Dangaard Brouer]

On Thu, 15 Jun 2017 19:07:22 +0300
Tariq Toukan <tariqt@mellanox.com> wrote:

> Use "-f <num>", to specify the index of the first
> sender thread.
> In default first thread is #0.
> 
> Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
> Cc: Jesper Dangaard Brouer <brouer@redhat.com>
[...]
>  
> +export L_THREAD=$(( THREADS + F_THREAD - 1 ))
> +

Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>

-- 
Best regards,
  Jesper Dangaard Brouer
  MSc.CS, Principal Kernel Engineer at Red Hat
  LinkedIn: http://www.linkedin.com/in/brouer

Re: [PATCH net-next V2 0/2] pktgen new parameters

[David Miller]

From: Tariq Toukan <tariqt@mellanox.com>
Date: Thu, 15 Jun 2017 19:07:20 +0300

> This patchset adds two parameters to the pktgen scripts.
> * The first patch adds a parameter to control the number of
>   packets sent by every pktgen thread.
> * The second patch adds a parameter to control the index of
>   first thread, instead of always starting from cpu 0.
> 
> Series generated against net-next commit:
> f7aec129a356 rxrpc: Cache the congestion window setting

Series applied, thanks Tariq.