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app/testpmd: do not allow dynamic change of core number

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When the number of forwarding cores changed in runtime, the issue may
be encountered:
If the nbcore set little than current nbcore, the forwarding thread
will still running on the extra cores. Therefore, trying to stop
forwarding will hang testpmd, since it will wait for the extra cores to
stop.

So do not allow to change nbcore number when forwarding is running.

Fixes: 0c0db76f42 ("app/testpmd: separate forward config setup from display")
Cc: stable@dpdk.org

Signed-off-by: Zhenghua Zhou <zhenghuax.zhou@intel.com>
Acked-by: Ferruh Yigit <ferruh.yigit@intel.com>
This commit is contained in:
Zhenghua Zhou 2020-10-27 06:42:52 +00:00 committed by Ferruh Yigit
parent ceccbcd738
commit 653c6ed4a1
1 changed files with 4 additions and 0 deletions
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4
app/test-pmd/config.c
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@ -3504,6 +3504,10 @@ set_fwd_lcores_mask(uint64_t lcoremask)
void
set_fwd_lcores_number(uint16_t nb_lc)
{
if (test_done == 0) {
printf("Please stop forwarding first\n");
return;
}
if (nb_lc > nb_cfg_lcores) {
printf("nb fwd cores %u > %u (max. number of configured "
"lcores) - ignored\n",