diff options
Diffstat (limited to 'cmake/lib/ssm.cmake')
| -rw-r--r-- | cmake/lib/ssm.cmake | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/cmake/lib/ssm.cmake b/cmake/lib/ssm.cmake new file mode 100644 index 00000000..71790a4a --- /dev/null +++ b/cmake/lib/ssm.cmake @@ -0,0 +1,89 @@ +# Pool size configuration for Ouroboros secure shared memory +# This file defines the allocation parameters for the +# secure shared memory pool allocator + +# Shared memory pool naming configuration +set(SSM_PREFIX "o7s.ssm" CACHE STRING + "Prefix for secure shared memory pools") +set(SSM_GSMP_SUFFIX ".gsmp" CACHE STRING + "Suffix for Group Shared Memory Pool") +set(SSM_PPP_SUFFIX ".ppp" CACHE STRING + "Suffix for Process Private Pool") + +set(SSM_POOL_NAME "/${SHM_PREFIX}.pool" CACHE INTERNAL + "Name for the main POSIX shared memory pool") +set(SSM_POOL_BLOCKS 16384 CACHE STRING + "Number of blocks in SSM packet pool, must be a power of 2") +set(SSM_PK_BUFF_HEADSPACE 256 CACHE STRING + "Bytes of headspace to reserve for future headers") +set(SSM_PK_BUFF_TAILSPACE 32 CACHE STRING + "Bytes of tailspace to reserve for future tails") +set(SSM_RBUFF_SIZE 1024 CACHE STRING + "Number of blocks in rbuff buffer, must be a power of 2") +set(SSM_RBUFF_PREFIX "/${SHM_PREFIX}.rbuff." CACHE INTERNAL + "Prefix for rbuff POSIX shared memory filenames") +set(SSM_FLOW_SET_PREFIX "/${SHM_PREFIX}.set." CACHE INTERNAL + "Prefix for the POSIX shared memory flow set") + +# Pool blocks per size class +# This determines how many blocks of each size are preallocated in the pool +# Higher values reduce allocation failures but increase memory usage +set(SSM_POOL_256_BLOCKS 1024 CACHE STRING + "Number of 256B blocks in pool") +set(SSM_POOL_512_BLOCKS 768 CACHE STRING + "Number of 512B blocks in pool") +set(SSM_POOL_1K_BLOCKS 512 CACHE STRING + "Number of 1KB blocks in pool") +set(SSM_POOL_2K_BLOCKS 384 CACHE STRING + "Number of 2KB blocks in pool") +set(SSM_POOL_4K_BLOCKS 256 CACHE STRING + "Number of 4KB blocks in pool") +set(SSM_POOL_16K_BLOCKS 128 CACHE STRING + "Number of 16KB blocks in pool") +set(SSM_POOL_64K_BLOCKS 64 CACHE STRING + "Number of 64KB blocks in pool") +set(SSM_POOL_256K_BLOCKS 32 CACHE STRING + "Number of 256KB blocks in pool") +set(SSM_POOL_1M_BLOCKS 16 CACHE STRING + "Number of 1MB blocks in pool") + +# Number of shards per size class for reducing contention +set(SSM_POOL_SHARDS 4 CACHE STRING + "Number of allocator shards per size class") + +# SSM packet buffer overhead - computed at compile time via sizeof() +# Defined in config.h.in as sizeof(_ssm_memory_block) + sizeof(_ssm_pk_buff) +# This makes it portable across platforms with different pid_t sizes and padding + +# Total shared memory pool size calculation +math(EXPR SSM_POOL_TOTAL_SIZE + "(1 << 8) * ${SSM_POOL_256_BLOCKS} + \ + (1 << 9) * ${SSM_POOL_512_BLOCKS} + \ + (1 << 10) * ${SSM_POOL_1K_BLOCKS} + \ + (1 << 11) * ${SSM_POOL_2K_BLOCKS} + \ + (1 << 12) * ${SSM_POOL_4K_BLOCKS} + \ + (1 << 14) * ${SSM_POOL_16K_BLOCKS} + \ + (1 << 16) * ${SSM_POOL_64K_BLOCKS} + \ + (1 << 18) * ${SSM_POOL_256K_BLOCKS} + \ + (1 << 20) * ${SSM_POOL_1M_BLOCKS}") + +set(SSM_POOL_TOTAL_SIZE ${SSM_POOL_TOTAL_SIZE} CACHE INTERNAL + "Total shared memory pool size in bytes") + +include(utils/HumanReadable) +format_bytes_human_readable(${SSM_POOL_TOTAL_SIZE} SSM_POOL_SIZE_DISPLAY) + +# Display configuration summary +message(STATUS "Secure Shared Memory Pool Configuration:") +message(STATUS " Pool prefix: ${SSM_PREFIX}") +message(STATUS " Size classes: " + "256B, 512B, 1KiB, 2KiB, 4KiB, 16KiB, 64KiB, 256KiB, 1MiB") +message(STATUS " Max allocation: 1 MB") +message(STATUS " Total pool size: ${SSM_POOL_SIZE_DISPLAY} " + "(${SSM_POOL_TOTAL_SIZE} bytes)") +message(STATUS " Shards per class: ${SSM_POOL_SHARDS}") +message(STATUS " Blocks per class: ${SSM_POOL_256_BLOCKS}, " + "${SSM_POOL_512_BLOCKS}, ${SSM_POOL_1K_BLOCKS}, " + "${SSM_POOL_2K_BLOCKS}, ${SSM_POOL_4K_BLOCKS}, " + "${SSM_POOL_16K_BLOCKS}, ${SSM_POOL_64K_BLOCKS}, " + "${SSM_POOL_256K_BLOCKS}, ${SSM_POOL_1M_BLOCKS}") |