diff options
| author |   Eli Cohen <eli@mellanox.co.il> | 2006-03-02 12:40:46 -0800 |
|---|---|---|
| committer |   Roland Dreier <rolandd@cisco.com> | 2006-03-20 10:08:22 -0800 |
| commit | 651eaac92894f8b6761c51b6637ea9cacea7fba2 (patch) | |
| tree | 8be06461ef870b7d130ebce39f55fe93af6ac542 /drivers/infiniband/hw/mthca/mthca_profile.c | |
| parent | IB/uverbs: Fix query QP return of sq_sig_all (diff) | |
| download | linux-dev-651eaac92894f8b6761c51b6637ea9cacea7fba2.tar.xz linux-dev-651eaac92894f8b6761c51b6637ea9cacea7fba2.zip | |
IB/mthca: Optimize large messages on Sinai HCAs
Sinai (one-port PCI Express) HCAs get improved throughput for messages
bigger than 80 KB in DDR mode if memory keys are formatted in a
specific way. The enhancement only works if the memory key table is
smaller than 2^24 entries. For larger tables, the enhancement is off
and a warning is printed (to avoid silent performance loss).
Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Michael Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/hw/mthca/mthca_profile.c')
| -rw-r--r-- | drivers/infiniband/hw/mthca/mthca_profile.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/mthca/mthca_profile.c b/drivers/infiniband/hw/mthca/mthca_profile.c index 08a909371b0a..58d44aa3c302 100644 --- a/drivers/infiniband/hw/mthca/mthca_profile.c +++ b/drivers/infiniband/hw/mthca/mthca_profile.c @@ -152,7 +152,7 @@ u64 mthca_make_profile(struct mthca_dev *dev, } if (total_size > mem_avail) { mthca_err(dev, "Profile requires 0x%llx bytes; " - "won't in 0x%llx bytes of context memory.\n", + "won't fit in 0x%llx bytes of context memory.\n", (unsigned long long) total_size, (unsigned long long) mem_avail); kfree(profile); @@ -262,6 +262,14 @@ u64 mthca_make_profile(struct mthca_dev *dev, */ dev->limits.num_pds = MTHCA_NUM_PDS; + if (dev->mthca_flags & MTHCA_FLAG_SINAI_OPT && + init_hca->log_mpt_sz > 23) { + mthca_warn(dev, "MPT table too large (requested size 2^%d >= 2^24)\n", + init_hca->log_mpt_sz); + mthca_warn(dev, "Disabling memory key throughput optimization.\n"); + dev->mthca_flags &= ~MTHCA_FLAG_SINAI_OPT; + } + /* * For Tavor, FMRs use ioremapped PCI memory. For 32 bit * systems it may use too much vmalloc space to map all MTT |