diff options
Diffstat (limited to 'cmake/config/ssm.cmake')
| -rw-r--r-- | cmake/config/ssm.cmake | 59 |
1 files changed, 53 insertions, 6 deletions
diff --git a/cmake/config/ssm.cmake b/cmake/config/ssm.cmake index aa369e53..913396ec 100644 --- a/cmake/config/ssm.cmake +++ b/cmake/config/ssm.cmake @@ -19,8 +19,18 @@ set(SSM_PK_BUFF_HEADSPACE 256 CACHE STRING "Bytes of headspace to reserve for future headers") set(SSM_PK_BUFF_TAILSPACE 32 CACHE STRING "Bytes of tailspace to reserve for future tails") -set(SSM_RBUFF_SIZE 1024 CACHE STRING +# Sized to absorb burst arrivals from fragmented SDUs without +# overflowing at the eth->FRCT boundary. Must hold at least one +# full FRCT reorder window plus margin for transient app-thread +# unavailability; 4x FRCT_REORDER_QUEUE_SIZE leaves comfortable +# burst headroom. Floor at 1024 for small RQ configs. +math(EXPR _SSM_RBUFF_DEFAULT "${FRCT_REORDER_QUEUE_SIZE} * 4") +if(_SSM_RBUFF_DEFAULT LESS 1024) + set(_SSM_RBUFF_DEFAULT 1024) +endif() +set(SSM_RBUFF_SIZE ${_SSM_RBUFF_DEFAULT} CACHE STRING "Number of blocks in rbuff buffer, must be a power of 2") +unset(_SSM_RBUFF_DEFAULT) set(SSM_RBUFF_PREFIX "/${SHM_PREFIX}.rbuff." CACHE INTERNAL "Prefix for rbuff POSIX shared memory filenames") set(SSM_FLOW_SET_PREFIX "/${SHM_PREFIX}.set." CACHE INTERNAL @@ -34,7 +44,7 @@ set(SSM_POOL_SHARDS 4 CACHE STRING # Shared by all processes in 'ouroboros' group (~60 MB total) set(SSM_GSPP_256_BLOCKS 1024 CACHE STRING "GSPP: Number of 256B blocks") -set(SSM_GSPP_512_BLOCKS 768 CACHE STRING +set(SSM_GSPP_512_BLOCKS 2048 CACHE STRING "GSPP: Number of 512B blocks") set(SSM_GSPP_1K_BLOCKS 512 CACHE STRING "GSPP: Number of 1KB blocks") @@ -53,13 +63,13 @@ set(SSM_GSPP_1M_BLOCKS 16 CACHE STRING # Per-User Pool (PUP) - for unprivileged applications # Each unprivileged app gets its own smaller pool (~7.5 MB total) -set(SSM_PUP_256_BLOCKS 128 CACHE STRING +set(SSM_PUP_256_BLOCKS 512 CACHE STRING "PUP: Number of 256B blocks") -set(SSM_PUP_512_BLOCKS 96 CACHE STRING +set(SSM_PUP_512_BLOCKS 512 CACHE STRING "PUP: Number of 512B blocks") -set(SSM_PUP_1K_BLOCKS 64 CACHE STRING +set(SSM_PUP_1K_BLOCKS 512 CACHE STRING "PUP: Number of 1KB blocks") -set(SSM_PUP_2K_BLOCKS 48 CACHE STRING +set(SSM_PUP_2K_BLOCKS 512 CACHE STRING "PUP: Number of 2KB blocks") set(SSM_PUP_4K_BLOCKS 32 CACHE STRING "PUP: Number of 4KB blocks") @@ -72,6 +82,23 @@ set(SSM_PUP_256K_BLOCKS 2 CACHE STRING set(SSM_PUP_1M_BLOCKS 0 CACHE STRING "PUP: Number of 1MB blocks") +# Zero classes too small for spb header + HEADSPACE + TAILSPACE + 1 B. +math(EXPR _SSM_MIN_USEFUL_CLASS + "32 + ${SSM_PK_BUFF_HEADSPACE} + ${SSM_PK_BUFF_TAILSPACE}") +foreach(_pair "256:256" "512:512" "1K:1024" "2K:2048") + string(REPLACE ":" ";" _p "${_pair}") + list(GET _p 0 _suffix) + list(GET _p 1 _size) + if(_size LESS _SSM_MIN_USEFUL_CLASS) + set(SSM_GSPP_${_suffix}_BLOCKS 0) + set(SSM_PUP_${_suffix}_BLOCKS 0) + endif() +endforeach() +unset(_SSM_MIN_USEFUL_CLASS) +unset(_p) +unset(_suffix) +unset(_size) + # SSM pool size calculations include(utils/HumanReadable) @@ -127,3 +154,23 @@ message(STATUS " Blocks: ${SSM_PUP_256_BLOCKS}, ${SSM_PUP_512_BLOCKS}, " "${SSM_PUP_1K_BLOCKS}, ${SSM_PUP_2K_BLOCKS}, ${SSM_PUP_4K_BLOCKS}, " "${SSM_PUP_16K_BLOCKS}, ${SSM_PUP_64K_BLOCKS}, ${SSM_PUP_256K_BLOCKS}, " "${SSM_PUP_1M_BLOCKS}") + +# FRCT reorder queue must fit in every enabled size class. If RQ_SIZE +# >= any backing pool, the receiver advertises a window the pool +# cannot back; np1_flow_write fails under load and a single dropped +# fragment wedges the flow. Auto-zeroed classes are skipped. +foreach(_class 256 512 1K 2K) + if(SSM_PUP_${_class}_BLOCKS GREATER 0 + AND NOT FRCT_REORDER_QUEUE_SIZE LESS SSM_PUP_${_class}_BLOCKS) + message(FATAL_ERROR + "FRCT_REORDER_QUEUE_SIZE (${FRCT_REORDER_QUEUE_SIZE}) must be " + "< SSM_PUP_${_class}_BLOCKS (${SSM_PUP_${_class}_BLOCKS}): " + "the FC window cannot exceed the pool that backs OOO stashing.") + endif() + if(SSM_GSPP_${_class}_BLOCKS GREATER 0 + AND NOT FRCT_REORDER_QUEUE_SIZE LESS SSM_GSPP_${_class}_BLOCKS) + message(FATAL_ERROR + "FRCT_REORDER_QUEUE_SIZE (${FRCT_REORDER_QUEUE_SIZE}) must be " + "< SSM_GSPP_${_class}_BLOCKS (${SSM_GSPP_${_class}_BLOCKS}).") + endif() +endforeach() |