Change Details

libpfctl: introduce state iterator Allow consumers to start processing states as the kernel supplies them, rather than having to build a full list and only then start processing. Especially for very large state tables this can significantly reduce memory use. With this change when retrieving 1M states time -l reports: real 3.55 user 1.95 sys 1.05 318832 maximum resident set size 194 average shared memory size 15 average unshared data size 127 average unshared stack size 79041 page reclaims 0 page faults 0 swaps 0 block input operations 0 block output operations 15096 messages sent 250001 messages received 0 signals received 22 voluntary context switches 34 involuntary context switches Without it it reported: real 3.32 user 1.88 sys 0.86 3220 maximum resident set size 195 average shared memory size 11 average unshared data size 128 average unshared stack size 260 page reclaims 0 page faults 0 swaps 0 block input operations 0 block output operations 15096 messages sent 250001 messages received 0 signals received 21 voluntary context switches 31 involuntary context switches Sponsored by: Rubicon Communications, LLC ("Netgate")

libpfctl: introduce state iterator Allow consumers to start processing states as the kernel supplies them, rather than having to build a full list and only then start processing. Especially for very large state tables this can significantly reduce memory use. Without this change when retrieving 1M states time -l reports: real 3.55 user 1.95 sys 1.05 318832 maximum resident set size 194 average shared memory size 15 average unshared data size 127 average unshared stack size 79041 page reclaims 0 page faults 0 swaps 0 block input operations 0 block output operations 15096 messages sent 250001 messages received 0 signals received 22 voluntary context switches 34 involuntary context switches With it it reported: real 3.32 user 1.88 sys 0.86 3220 maximum resident set size 195 average shared memory size 11 average unshared data size 128 average unshared stack size 260 page reclaims 0 page faults 0 swaps 0 block input operations 0 block output operations 15096 messages sent 250001 messages received 0 signals received 21 voluntary context switches 31 involuntary context switches Sponsored by: Rubicon Communications, LLC ("Netgate")

libpfctl: introduce state iterator Allow consumers to start processing states as the kernel supplies them, rather than having to build a full list and only then start processing. Especially for very large state tables this can significantly reduce memory use. Without this change when retrieving 1M states time -l reports: real 3.55 user 1.95 sys 1.05 318832 maximum resident set size 194 average shared memory size 15 average unshared data size 127 average unshared stack size 79041 page reclaims 0 page faults 0 swaps 0 block input operations 0 block output operations 15096 messages sent 250001 messages received 0 signals received 22 voluntary context switches 34 involuntary context switches Without it it reported: real 3.32 user 1.88 sys 0.86 3220 maximum resident set size 195 average shared memory size 11 average unshared data size 128 average unshared stack size 260 page reclaims 0 page faults 0 swaps 0 block input operations 0 block output operations 15096 messages sent 250001 messages received 0 signals received 21 voluntary context switches 31 involuntary context switches Sponsored by: Rubicon Communications, LLC ("Netgate")