search for: r_sockconnect

...instead. I?aki > Unit: microseconds > expr min lq mean median uq max > clusterEvalQ(cl, iris) 1449.997 43991.99 43975.21 43997.1 44001.91 48027.83 > neval > 1000 > > exactly the same machine + R but with TCP_NODELAY enabled in R_SockConnect(): > > Unit: microseconds > expr min lq mean median uq max neval > clusterEvalQ(cl, iris) 156.125 166.41 180.8806 170.247 174.298 5322.234 1000 > > Cheers, > Simon > > > > On 2/11/2020, at 3:39 AM, Jeff <jeff at vtkelle...

I'm exploring latency overhead of parallel PSOCK workers and noticed that serializing/unserializing data back to the main R session is significantly slower on Linux than it is on Windows/MacOS with similar hardware. Is there a reason for this difference and is there a way to avoid the apparent additional Linux overhead? I attempted to isolate the behavior with a test that simply returns

...file /usr/include/sys/stream.h. This worked for a while, but soon another error resulted: ===+===+===+===+===+===+===+===+===+===+===+===+===+===+===+===+===+===+=== gcc -I. -I../../../src/include -I../../../src/include -DHAVE_CONFIG_H -fPIC -g -O2 -c Rsock.c -o Rsock.lo Rsock.c: In function `R_SockConnect': Rsock.c:378: `len' undeclared (first use in this function) Rsock.c:378: (Each undeclared identifier is reported only once Rsock.c:378: for each function it appears in.) *** Error code 1 make: Fatal error: Command failed for target `Rsock.lo' Current working directory /tmp/Rtmp/R-1.6.2...

...conds >>> expr min lq mean median uq max >>> clusterEvalQ(cl, iris) 1449.997 43991.99 43975.21 43997.1 44001.91 48027.83 >>> neval >>> 1000 >>> exactly the same machine + R but with TCP_NODELAY enabled in R_SockConnect(): >>> Unit: microseconds >>> expr min lq mean median uq max neval >>> clusterEvalQ(cl, iris) 156.125 166.41 180.8806 170.247 174.298 5322.234 1000 >>> Cheers, >>> Simon >>> > On 2/11/2020, at 3:39...

...ould do with TCP_NODELAY -- without (status quo): Unit: microseconds expr min lq mean median uq max clusterEvalQ(cl, iris) 1449.997 43991.99 43975.21 43997.1 44001.91 48027.83 neval 1000 exactly the same machine + R but with TCP_NODELAY enabled in R_SockConnect(): Unit: microseconds expr min lq mean median uq max neval clusterEvalQ(cl, iris) 156.125 166.41 180.8806 170.247 174.298 5322.234 1000 Cheers, Simon > On 2/11/2020, at 3:39 AM, Jeff <jeff at vtkellers.com> wrote: > > I'm exploring...

...expr min lq mean median uq >> max >> clusterEvalQ(cl, iris) 1449.997 43991.99 43975.21 43997.1 44001.91 >> 48027.83 >> neval >> 1000 >> >> exactly the same machine + R but with TCP_NODELAY enabled in >> R_SockConnect(): >> >> Unit: microseconds >> expr min lq mean median uq >> max neval >> clusterEvalQ(cl, iris) 156.125 166.41 180.8806 170.247 174.298 >> 5322.234 1000 >> >> Cheers, >> Simon >> >&...

...expr min lq mean median uq max > >>> clusterEvalQ(cl, iris) 1449.997 43991.99 43975.21 43997.1 44001.91 48027.83 > >>> neval > >>> 1000 > >>> exactly the same machine + R but with TCP_NODELAY enabled in R_SockConnect(): > >>> Unit: microseconds > >>> expr min lq mean median uq max neval > >>> clusterEvalQ(cl, iris) 156.125 166.41 180.8806 170.247 174.298 5322.234 1000 > >>> Cheers, > >>> Simon > >>&g...

...d from nanoftp.c making nanohttp.d from nanohttp.c making sock.d from sock.c making sockconn.d from sockconn.c gcc -no-cpp-precomp -I. -I../../../src/include -I../../../src/include -I/sw/include -I/usr/local/include -DHAVE_CONFIG_H -fno-common -g -O2 -c Rsock.c -o Rsock.lo Rsock.c: In function `R_SockConnect': Rsock.c:380: warning: passing arg 5 of `getsockopt' from incompatible pointer type gcc -no-cpp-precomp -I. -I../../../src/include -I../../../src/include -I/sw/include -I/usr/local/include -DHAVE_CONFIG_H -fno-common -g -O2 -c internet.c -o internet.lo gcc -no-cpp-precomp -I. -I../../...