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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2009-10-02 20:24:59 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-10-04 21:08:54 -0700 |
| commit | 896a7cf8d846a9e86fb823be16f4f14ffeb7f074 (patch) | |
| tree | 2260fac9cccf51938d710ab0fc74dc0fa0503a4f | |
| parent | a825e00c98a2ee37eb2a0ad93b352e79d2bc1593 (diff) | |
| download | kernel_samsung_espresso10-896a7cf8d846a9e86fb823be16f4f14ffeb7f074.zip kernel_samsung_espresso10-896a7cf8d846a9e86fb823be16f4f14ffeb7f074.tar.gz kernel_samsung_espresso10-896a7cf8d846a9e86fb823be16f4f14ffeb7f074.tar.bz2 | |
pktgen: Fix multiqueue handling
It is not currently possible to instruct pktgen to use one selected tx queue.
When Robert added multiqueue support in commit 45b270f8, he added
an interval (queue_map_min, queue_map_max), and his code doesnt take
into account the case of min = max, to select one tx queue exactly.
I suspect a high performance setup on a eight txqueue device wants
to use exactly eight cpus, and assign one tx queue to each sender.
This patchs makes pktgen select the right tx queue, not the first one.
Also updates Documentation to reflect Robert changes.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Robert Olsson <robert.olsson@its.uu.se>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | Documentation/networking/pktgen.txt | 8 | ||||
| -rw-r--r-- | net/core/pktgen.c | 2 |
2 files changed, 9 insertions, 1 deletions
diff --git a/Documentation/networking/pktgen.txt b/Documentation/networking/pktgen.txt index c6cf4a3..61bb645 100644 --- a/Documentation/networking/pktgen.txt +++ b/Documentation/networking/pktgen.txt @@ -90,6 +90,11 @@ Examples: pgset "dstmac 00:00:00:00:00:00" sets MAC destination address pgset "srcmac 00:00:00:00:00:00" sets MAC source address + pgset "queue_map_min 0" Sets the min value of tx queue interval + pgset "queue_map_max 7" Sets the max value of tx queue interval, for multiqueue devices + To select queue 1 of a given device, + use queue_map_min=1 and queue_map_max=1 + pgset "src_mac_count 1" Sets the number of MACs we'll range through. The 'minimum' MAC is what you set with srcmac. @@ -101,6 +106,9 @@ Examples: IPDST_RND, UDPSRC_RND, UDPDST_RND, MACSRC_RND, MACDST_RND MPLS_RND, VID_RND, SVID_RND + QUEUE_MAP_RND # queue map random + QUEUE_MAP_CPU # queue map mirrors smp_processor_id() + pgset "udp_src_min 9" set UDP source port min, If < udp_src_max, then cycle through the port range. diff --git a/net/core/pktgen.c b/net/core/pktgen.c index b694552..421857c 100644 --- a/net/core/pktgen.c +++ b/net/core/pktgen.c @@ -2212,7 +2212,7 @@ static void set_cur_queue_map(struct pktgen_dev *pkt_dev) if (pkt_dev->flags & F_QUEUE_MAP_CPU) pkt_dev->cur_queue_map = smp_processor_id(); - else if (pkt_dev->queue_map_min < pkt_dev->queue_map_max) { + else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) { __u16 t; if (pkt_dev->flags & F_QUEUE_MAP_RND) { t = random32() % |