From: Bruce Richardson Date: Tue, 4 May 2021 13:14:51 +0000 (+0100) Subject: raw/ioat: fix script for configuring small number of queues X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=cfb286ab2b487b6e40f958a096fbe8cd13aa055d;p=dpdk.git raw/ioat: fix script for configuring small number of queues The dpdk_idxd_cfg.py script included with the driver for convenience did not work properly where the number of queues to be configured was less than the number of groups or engines. This was because there would be configured groups/engines not assigned to queues. Fix this by limiting the engine and group counts to be no bigger than the number of queues. Fixes: 01863b9d2354 ("raw/ioat: include example configuration script") Cc: stable@dpdk.org Signed-off-by: Bruce Richardson --- diff --git a/drivers/raw/ioat/dpdk_idxd_cfg.py b/drivers/raw/ioat/dpdk_idxd_cfg.py index bce4bb5bd4..56e44063e4 100755 --- a/drivers/raw/ioat/dpdk_idxd_cfg.py +++ b/drivers/raw/ioat/dpdk_idxd_cfg.py @@ -39,15 +39,15 @@ def configure_dsa(dsa_id, queues): max_queues = dsa_dir.read_int("max_work_queues") max_tokens = dsa_dir.read_int("max_tokens") - # we want one engine per group - nb_groups = min(max_engines, max_groups) - for grp in range(nb_groups): - dsa_dir.write_values({f"engine{dsa_id}.{grp}/group_id": grp}) - nb_queues = min(queues, max_queues) if queues > nb_queues: print(f"Setting number of queues to max supported value: {max_queues}") + # we want one engine per group, and no more engines than queues + nb_groups = min(max_engines, max_groups, nb_queues) + for grp in range(nb_groups): + dsa_dir.write_values({f"engine{dsa_id}.{grp}/group_id": grp}) + # configure each queue for q in range(nb_queues): wq_dir = SysfsDir(os.path.join(dsa_dir.path, f"wq{dsa_id}.{q}"))