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Harald Welte laforge at osmocom.orgVadim also requested comparison of performance with his systemd-journald log target in teh same benchmark. Pleae find the results below: systemd-journald (raw=false) [4, 8) 1427 | | [8, 16) 331242 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@| [16, 32) 95378 |@@@@@@@@@@@@@@ | [32, 64) 2874 | | [64, 128) 449 | | [128, 256) 48 | | [256, 512) 7 | | [512, 1K) 1 | | [1K, 2K) 0 | | [2K, 4K) 0 | | [4K, 8K) 0 | | [8K, 16K) 0 | | [16K, 32K) 0 | | [32K, 64K) 0 | | [64K, 128K) 0 | | [128K, 256K) 0 | | [256K, 512K) 0 | | [512K, 1M) 0 | | [1M, 2M) 0 | | [2M, 4M) 0 | | [4M, 8M) 0 | | [8M, 16M) 0 | | [16M, 32M) 0 | | [32M, 64M) 0 | | [64M, 128M) 0 | | [128M, 256M) 0 | | [256M, 512M) 0 | | [512M, 1G) 0 | | [1G, 2G) 0 | | [2G, 4G) 81 | | systemd-journald (raw=true) [4, 8) 5477 | | [8, 16) 576683 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@| [16, 32) 143985 |@@@@@@@@@@@@ | [32, 64) 3000 | | [64, 128) 772 | | [128, 256) 107 | | [256, 512) 8 | | [512, 1K) 0 | | [1K, 2K) 0 | | [2K, 4K) 0 | | [4K, 8K) 1 | | [8K, 16K) 0 | | [16K, 32K) 0 | | [32K, 64K) 0 | | [64K, 128K) 0 | | [128K, 256K) 0 | | [256K, 512K) 0 | | [512K, 1M) 0 | | [1M, 2M) 0 | | [2M, 4M) 0 | | [4M, 8M) 0 | | [8M, 16M) 0 | | [16M, 32M) 0 | | [32M, 64M) 0 | | [64M, 128M) 0 | | [128M, 256M) 0 | | [256M, 512M) 0 | | [512M, 1G) 0 | | [1G, 2G) 0 | | [2G, 4G) 48 | | So we can see that both of these are actually quite good: Up to 1ms for almost all log writes in the raw=false case, and more or less the same order of magnitude for the raw case. Both are much better than blocking stderr + systemd picking up stderr (where latencies up to 128ms are observed at times. -- - Harald Welte <laforge at osmocom.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)