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ip/torrent: use NPROC processes in parallel for calculating initial piece hashes

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This commit is contained in:
cinap_lenrek 2013-04-20 22:47:39 +02:00
parent c31c4ca7b3
commit c04297587c
1 changed files with 19 additions and 2 deletions
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21
sys/src/cmd/ip/torrent.c
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@ -49,6 +49,7 @@ enum {
};
int debug;
int nproc = 1;
int killgroup = -1;
int port = 6881;
char *deftrack = "http://exodus.desync.com/announce";
@ -1197,6 +1198,12 @@ main(int argc, char *argv[])
usage();
} ARGEND;
if((s = getenv("NPROC")) != 0){
if((nproc = atoi(s)) <= 0)
nproc = 1;
free(s);
}
fd = 0;
if(*argv)
if((fd = open(*argv, OREAD)) < 0)
@ -1301,8 +1308,18 @@ main(int argc, char *argv[])
if(len)
sysfatal("pieces do not match file length");
for(i = 0; i<npieces; i++)
havepiece(i);
for(i=0; i<nproc; i++){
switch(rfork(RFPROC|RFMEM)){
case -1:
sysfatal("fork: %r");
case 0:
for(; i<npieces; i+=nproc)
havepiece(i);
exits(0);
}
}
while(waitpid() >= 0)
;
srand(time(0));
atnotify(catch, 1);