> Sys.getpid()
[1] 1505
> parallel::m
parallel::mcMap parallel::mclapply parallel::mcaffinity parallel::mcmapply parallel::mccollect
parallel::makePSOCKcluster parallel::mcparallel parallel::makeCluster parallel::mc.reset.stream parallel::makeForkCluster
> parallel::mcparallel(Sys.sleep(100))
$pid
[1] 2758
$fd
[1] 3 6
attr(,"class")
[1] "parallelJob" "childProcess" "process"
> multicore::mcparallel(Sys.sleep(100))
parallelJob: processID=2830
liqg@cycad:~/soft/R/R-3.3.2/library$ ps aux |grep liqg |grep R
liqg 1505 1.2 0.0 2232836 38304 pts/13 S+ 18:26 0:06 /usr/lib/R/bin/exec/R
liqg 2758 0.0 0.0 2230104 32272 pts/13 S+ 18:34 0:00 /usr/lib/R/bin/exec/R
liqg 2830 0.0 0.0 2232836 32568 pts/13 S+ 18:35 0:00 /usr/lib/R/bin/exec/R
liqg@cycad:~/soft/R/R-3.3.2/library$ kill -9 1505
liqg@cycad:~/soft/R/R-3.3.2/library$ ps aux |grep liqg |grep R
liqg 2758 0.0 0.0 2230104 32272 pts/13 S 18:34 0:00 /usr/lib/R/bin/exec/R
- download source code of R (R-3.3.2) , decompress and change dir
tar xf R-3.3.2.tar.gz & cd xf R-3.3.2
- change src/library/parallel/src/fork.c by adding a head file and set
prctl(PR_SET_PDEATHSIG, SIGTERM):
#include <sys/prctl.h>
if (pid == 0) { /* child */ # line 275 of origin file
int r_prctl = prctl(PR_SET_PDEATHSIG, SIGTERM); // adding line
if (r_prctl == -1) { perror(0); exit(1); } // adding line
sudo cp -r parallel /usr/lib/R/library