ExternalVendorCode/tippecanoe
1
0
Fork 0
mirror of https://github.com/mapbox/tippecanoe.git synced 2025-03-23 12:25:16 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Add a check for environmental variable TIPPECANOE_MAX_THREADS

Browse Source
This commit is contained in:
Eric Fischer 2017-02-17 16:47:21 -08:00
parent 9c1f2b2123
commit 55e7e20a73
3 changed files with 18 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
README.md
View File

@ -147,6 +147,12 @@ resolution is obtained than by using a smaller _maxzoom_ or _detail_.
* -pt or --no-tiny-polygon-reduction: Don't combine the area of very small polygons into small squares that represent their combined area.
* -q or --quiet: Work quietly instead of reporting progress
Environment
-----------
Tippecanoe ordinarily uses as many parallel threads as the operating system claims that CPUs are available.
You can override this number by setting the `TIPPECANOE_MAX_THREADS` environmental variable.
Example
-------

9
main.cpp
View File

@ -117,7 +117,14 @@ void checkdisk(struct reader *r, int nreader) {
};
void init_cpus() {
CPUS = sysconf(_SC_NPROCESSORS_ONLN);
const char *TIPPECANOE_MAX_THREADS = getenv("TIPPECANOE_MAX_THREADS");
if (TIPPECANOE_MAX_THREADS != NULL) {
CPUS = atoi(TIPPECANOE_MAX_THREADS);
} else {
CPUS = sysconf(_SC_NPROCESSORS_ONLN);
}
if (CPUS < 1) {
CPUS = 1;
}

4
man/tippecanoe.1
View File

@ -188,6 +188,10 @@ which may not be what you want.
.IP \(bu 2
\-q or \-\-quiet: Work quietly instead of reporting progress
.RE
.SH Environment
.PP
Tippecanoe ordinarily uses as many parallel threads as the operating system claims that CPUs are available.
You can override this number by setting the \fB\fCTIPPECANOE_MAX_THREADS\fR environmental variable.
.SH Example
.PP
.RS