diff options
| author | Vennila Megavannan <vennila.megavannan@intel.com> | 2016-02-09 14:29:49 -0800 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2016-03-10 20:38:07 -0500 |
| commit | bfee5e32e701b98634b380a9eef8b5820feb7488 (patch) | |
| tree | 2d88caba4531edaee754643fdb943450765f0ca8 /include/rdma | |
| parent | 773d0451685b96f157ccd617a5e9cd9d3fa7d986 (diff) | |
| download | linux-bfee5e32e701b98634b380a9eef8b5820feb7488.tar.gz linux-bfee5e32e701b98634b380a9eef8b5820feb7488.tar.bz2 linux-bfee5e32e701b98634b380a9eef8b5820feb7488.zip | |
IB/rdmavt, staging/rdma/hfi1: use qps to dynamically scale timeout value
A busy_jiffies variable is maintained and updated when rc qps are
created and deleted. busy_jiffies is a scaled value of the number
of rc qps in the device. busy_jiffies is incremented every rc qp
scaling interval. busy_jiffies is added to the rc timeout
in add_retry_timer and mod_retry_timer. The rc qp scaling interval
is selected based on extensive performance evaluation of targeted
workloads.
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Vennila Megavannan <vennila.megavannan@intel.com>
Signed-off-by: Jubin John <jubin.john@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'include/rdma')
| -rw-r--r-- | include/rdma/rdma_vt.h | 4 | ||||
| -rw-r--r-- | include/rdma/rdmavt_qp.h | 2 |
2 files changed, 5 insertions, 1 deletions
diff --git a/include/rdma/rdma_vt.h b/include/rdma/rdma_vt.h index 4242fea9cf4e..5ccf683b28f1 100644 --- a/include/rdma/rdma_vt.h +++ b/include/rdma/rdma_vt.h @@ -318,7 +318,9 @@ struct rvt_dev_info { /* QP */ struct rvt_qp_ibdev *qp_dev; u32 n_qps_allocated; /* number of QPs allocated for device */ - spinlock_t n_qps_lock; /* keep track of number of qps */ + u32 n_rc_qps; /* number of RC QPs allocated for device */ + u32 busy_jiffies; /* timeout scaling based on RC QP count */ + spinlock_t n_qps_lock; /* protect qps, rc qps and busy jiffy counts */ /* memory maps */ struct list_head pending_mmaps; diff --git a/include/rdma/rdmavt_qp.h b/include/rdma/rdmavt_qp.h index aed13e13591c..b3ea74579316 100644 --- a/include/rdma/rdmavt_qp.h +++ b/include/rdma/rdmavt_qp.h @@ -225,6 +225,8 @@ struct rvt_ack_entry { }; }; +#define RC_QP_SCALING_INTERVAL 5 + /* * Variables prefixed with s_ are for the requester (sender). * Variables prefixed with r_ are for the responder (receiver). |