Change Details

``` >while true; do pwait 24242 2>/dev/null; done load: 4.60 cmd: pwait 19906 [running] 0.00r 0.00u 0.00s 11% 2120k load: 4.60 cmd: zsh 20841 [running] 0.00r 0.00u 0.00s 12% 0k load: 4.60 cmd: zsh 21720 [running] 0.00r 0.00u 0.00s 14% 0k load: 4.60 cmd: zsh 6748 [running] 18810.01r 0.69u 6.41s 15% 7152k load: 4.47 cmd: pwait 22730 [running] 0.00r 0.00u 0.00s 14% 2316k load: 4.47 cmd: zsh 6748 [running] 18812.13r 0.72u 6.89s 15% 7152k load: 4.47 cmd: pwait 23691 [running] 0.00r 0.00u 0.00s 16% 2172k load: 4.47 cmd: pwait 23935 [running] 0.00r 0.00u 0.00s 17% 2172k load: 4.47 cmd: zsh 24108 [running] 0.00r 0.00u 0.00s 16% 5624k load: 4.47 cmd: pwait 24242 [kqread] 0.02r 0.00u 0.00s 17% 2300k load: 4.47 cmd: pwait 24242 [kqread] 0.25r 0.00u 0.00s 17% 2300k load: 4.47 cmd: pwait 24242 [kqread] 0.66r 0.00u 0.00s 15% 2300k ```

Without patch proposed: ``` >while true; do pwait 24242 2>/dev/null; done load: 4.60 cmd: pwait 19906 [running] 0.00r 0.00u 0.00s 11% 2120k load: 4.60 cmd: zsh 20841 [running] 0.00r 0.00u 0.00s 12% 0k load: 4.60 cmd: zsh 21720 [running] 0.00r 0.00u 0.00s 14% 0k load: 4.60 cmd: zsh 6748 [running] 18810.01r 0.69u 6.41s 15% 7152k load: 4.47 cmd: pwait 22730 [running] 0.00r 0.00u 0.00s 14% 2316k load: 4.47 cmd: zsh 6748 [running] 18812.13r 0.72u 6.89s 15% 7152k load: 4.47 cmd: pwait 23691 [running] 0.00r 0.00u 0.00s 16% 2172k load: 4.47 cmd: pwait 23935 [running] 0.00r 0.00u 0.00s 17% 2172k load: 4.47 cmd: zsh 24108 [running] 0.00r 0.00u 0.00s 16% 5624k load: 4.47 cmd: pwait 24242 [kqread] 0.02r 0.00u 0.00s 17% 2300k load: 4.47 cmd: pwait 24242 [kqread] 0.25r 0.00u 0.00s 17% 2300k load: 4.47 cmd: pwait 24242 [kqread] 0.66r 0.00u 0.00s 15% 2300k ``` With patch proposed: ``` >while true; do ./pwait 64242 2>&1; done | fgrep -v 'No such process' load: 11.65 cmd: zsh 60713 [running] 0.00r 0.00u 0.00s 12% 6960k load: 11.65 cmd: zsh 55569 [running] 10.09r 0.17u 2.21s 15% 7152k load: 11.36 cmd: pwait 62673 [running] 0.00r 0.00u 0.00s 15% 2236k load: 11.36 cmd: zsh 55569 [running] 12.56r 0.20u 2.77s 16% 7152k pwait: 64242: skip my own pid load: 11.36 cmd: zsh 65110 [running] 0.00r 0.00u 0.00s 19% 7148k load: 11.36 cmd: zsh 55569 [running] 16.07r 0.25u 3.56s 19% 7152k load: 10.77 cmd: pwait 66246 [running] 0.00r 0.00u 0.00s 19% 2304k load: 10.77 cmd: zsh 55569 [running] 17.96r 0.31u 3.95s 20% 7152k load: 10.77 cmd: pwait 67423 [running] 0.00r 0.00u 0.00s 20% 2208k ^C ```

Without patch proposed: ``` >while true; do pwait 24242 2>/dev/null; done load: 4.60 cmd: pwait 19906 [running] 0.00r 0.00u 0.00s 11% 2120k load: 4.60 cmd: zsh 20841 [running] 0.00r 0.00u 0.00s 12% 0k load: 4.60 cmd: zsh 21720 [running] 0.00r 0.00u 0.00s 14% 0k load: 4.60 cmd: zsh 6748 [running] 18810.01r 0.69u 6.41s 15% 7152k load: 4.47 cmd: pwait 22730 [running] 0.00r 0.00u 0.00s 14% 2316k load: 4.47 cmd: zsh 6748 [running] 18812.13r 0.72u 6.89s 15% 7152k load: 4.47 cmd: pwait 23691 [running] 0.00r 0.00u 0.00s 16% 2172k load: 4.47 cmd: pwait 23935 [running] 0.00r 0.00u 0.00s 17% 2172k load: 4.47 cmd: zsh 24108 [running] 0.00r 0.00u 0.00s 16% 5624k load: 4.47 cmd: pwait 24242 [kqread] 0.02r 0.00u 0.00s 17% 2300k load: 4.47 cmd: pwait 24242 [kqread] 0.25r 0.00u 0.00s 17% 2300k load: 4.47 cmd: pwait 24242 [kqread] 0.66r 0.00u 0.00s 15% 2300k ``` With patch proposed: ``` >while true; do ./pwait 64242 2>&1; done | fgrep -v 'No such process' load: 11.65 cmd: zsh 60713 [running] 0.00r 0.00u 0.00s 12% 6960k load: 11.65 cmd: zsh 55569 [running] 10.09r 0.17u 2.21s 15% 7152k load: 11.36 cmd: pwait 62673 [running] 0.00r 0.00u 0.00s 15% 2236k load: 11.36 cmd: zsh 55569 [running] 12.56r 0.20u 2.77s 16% 7152k pwait: 64242: skip my own pid load: 11.36 cmd: zsh 65110 [running] 0.00r 0.00u 0.00s 19% 7148k load: 11.36 cmd: zsh 55569 [running] 16.07r 0.25u 3.56s 19% 7152k load: 10.77 cmd: pwait 66246 [running] 0.00r 0.00u 0.00s 19% 2304k load: 10.77 cmd: zsh 55569 [running] 17.96r 0.31u 3.95s 20% 7152k load: 10.77 cmd: pwait 67423 [running] 0.00r 0.00u 0.00s 20% 2208k ^C ```