Added a new command in ProcessGDBRemote that can figure out the performance characterisitics of your GDB remote server.
To addess this, attach to any GDB server and when stopped type:
(lldb) process plugin packet speed-test
The default will send a variety of packets with different amounts of data to send/receive and print the performance of each packet type:
Testing sending 1000 packets of various sizes:
qSpeedTest(send=0 , recv=0 ) in 0.057837000 sec for 17289.97 packets/sec ( 0.057837 ms per packet) with standard deviation of 0.007705 ms
qSpeedTest(send=0 , recv=4 ) in 0.056162000 sec for 17805.63 packets/sec ( 0.056162 ms per packet) with standard deviation of 0.004439 ms
qSpeedTest(send=0 , recv=8 ) in 0.057687000 sec for 17334.93 packets/sec ( 0.057687 ms per packet) with standard deviation of 0.008135 ms
qSpeedTest(send=0 , recv=16 ) in 0.058547000 sec for 17080.29 packets/sec ( 0.058547 ms per packet) with standard deviation of 0.005884 ms
qSpeedTest(send=0 , recv=32 ) in 0.058289000 sec for 17155.89 packets/sec ( 0.058289 ms per packet) with standard deviation of 0.004057 ms
qSpeedTest(send=0 , recv=64 ) in 0.061324000 sec for 16306.83 packets/sec ( 0.061324 ms per packet) with standard deviation of 0.010838 ms
qSpeedTest(send=0 , recv=128 ) in 0.065688000 sec for 15223.48 packets/sec ( 0.065688 ms per packet) with standard deviation of 0.006997 ms
qSpeedTest(send=0 , recv=256 ) in 0.070621000 sec for 14160.09 packets/sec ( 0.070621 ms per packet) with standard deviation of 0.006188 ms
qSpeedTest(send=0 , recv=512 ) in 0.086738000 sec for 11528.97 packets/sec ( 0.086738 ms per packet) with standard deviation of 0.007867 ms
qSpeedTest(send=0 , recv=1024 ) in 0.146375000 sec for 6831.77 packets/sec ( 0.146375 ms per packet) with standard deviation of 0.010313 ms
qSpeedTest(send=4 , recv=0 ) in 0.057807000 sec for 17298.94 packets/sec ( 0.057807 ms per packet) with standard deviation of 0.009702 ms
....
It will then also use various sizes to receive 4MB of data from the GDB server and print out the stats:
Testing receiving 4.0MB of data using varying receive packet sizes:
qSpeedTest(send=0 , recv=32 ) 131072 packets needed to receive 4.0MB in 7.721290000 sec for 0.518048 MB/sec for 16975.40 packets/sec ( 0.058909 ms per packet)
qSpeedTest(send=0 , recv=64 ) 65536 packets needed to receive 4.0MB in 4.029236000 sec for 0.992744 MB/sec for 16265.12 packets/sec ( 0.061481 ms per packet)
qSpeedTest(send=0 , recv=128 ) 32768 packets needed to receive 4.0MB in 2.233854000 sec for 1.790627 MB/sec for 14668.82 packets/sec ( 0.068172 ms per packet)
qSpeedTest(send=0 , recv=256 ) 16384 packets needed to receive 4.0MB in 1.160024000 sec for 3.448204 MB/sec for 14123.84 packets/sec ( 0.070802 ms per packet)
qSpeedTest(send=0 , recv=512 ) 8192 packets needed to receive 4.0MB in 0.701603000 sec for 5.701230 MB/sec for 11676.12 packets/sec ( 0.085645 ms per packet)
qSpeedTest(send=0 , recv=1024 ) 4096 packets needed to receive 4.0MB in 0.596786000 sec for 6.702570 MB/sec for 6863.43 packets/sec ( 0.145700 ms per packet)
There is a JSON mode so we can use this in the test suite to track GDB server performance for each platform:
(lldb) process plugin packet speed-test --json
{ "packet_speeds" : {
"num_packets" : 1000,
"results" : [
{"send_size" : 0, "recv_size" : 0, "total_time_nsec" : 64516000, "standard_deviation_nsec" : 20566 },
{"send_size" : 0, "recv_size" : 4, "total_time_nsec" : 59648000, "standard_deviation_nsec" : 10493 },
{"send_size" : 0, "recv_size" : 8, "total_time_nsec" : 56894000, "standard_deviation_nsec" : 5480 },
{"send_size" : 0, "recv_size" : 16, "total_time_nsec" : 59422000, "standard_deviation_nsec" : 6557 },
{"send_size" : 0, "recv_size" : 32, "total_time_nsec" : 61159000, "standard_deviation_nsec" : 12384 },
{"send_size" : 0, "recv_size" : 64, "total_time_nsec" : 61386000, "standard_deviation_nsec" : 9208 },
{"send_size" : 0, "recv_size" : 128, "total_time_nsec" : 64768000, "standard_deviation_nsec" : 4737 },
{"send_size" : 0, "recv_size" : 256, "total_time_nsec" : 71046000, "standard_deviation_nsec" : 5904 },
{"send_size" : 0, "recv_size" : 512, "total_time_nsec" : 87233000, "standard_deviation_nsec" : 8967 },
{"send_size" : 0, "recv_size" : 1024, "total_time_nsec" : 146629000, "standard_deviation_nsec" : 9526 },
{"send_size" : 4, "recv_size" : 0, "total_time_nsec" : 57131000, "standard_deviation_nsec" : 7884 },
{"send_size" : 4, "recv_size" : 4, "total_time_nsec" : 56772000, "standard_deviation_nsec" : 6064 },
{"send_size" : 4, "recv_size" : 8, "total_time_nsec" : 57450000, "standard_deviation_nsec" : 6341 },
{"send_size" : 4, "recv_size" : 16, "total_time_nsec" : 58279000, "standard_deviation_nsec" : 5998 },
{"send_size" : 4, "recv_size" : 32, "total_time_nsec" : 59995000, "standard_deviation_nsec" : 6294 },
{"send_size" : 4, "recv_size" : 64, "total_time_nsec" : 61632000, "standard_deviation_nsec" : 7838 },
{"send_size" : 4, "recv_size" : 128, "total_time_nsec" : 66535000, "standard_deviation_nsec" : 8026 },
{"send_size" : 4, "recv_size" : 256, "total_time_nsec" : 72754000, "standard_deviation_nsec" : 9519 },
{"send_size" : 4, "recv_size" : 512, "total_time_nsec" : 87072000, "standard_deviation_nsec" : 9268 },
{"send_size" : 4, "recv_size" : 1024, "total_time_nsec" : 147221000, "standard_deviation_nsec" : 9702 },
{"send_size" : 8, "recv_size" : 0, "total_time_nsec" : 57900000, "standard_deviation_nsec" : 7356 },
{"send_size" : 8, "recv_size" : 4, "total_time_nsec" : 58116000, "standard_deviation_nsec" : 7630 },
{"send_size" : 8, "recv_size" : 8, "total_time_nsec" : 57745000, "standard_deviation_nsec" : 8541 },
{"send_size" : 8, "recv_size" : 16, "total_time_nsec" : 59091000, "standard_deviation_nsec" : 7851 },
{"send_size" : 8, "recv_size" : 32, "total_time_nsec" : 59943000, "standard_deviation_nsec" : 6761 },
{"send_size" : 8, "recv_size" : 64, "total_time_nsec" : 62097000, "standard_deviation_nsec" : 8580 },
{"send_size" : 8, "recv_size" : 128, "total_time_nsec" : 69942000, "standard_deviation_nsec" : 16645 },
{"send_size" : 8, "recv_size" : 256, "total_time_nsec" : 72927000, "standard_deviation_nsec" : 11031 },
{"send_size" : 8, "recv_size" : 512, "total_time_nsec" : 87221000, "standard_deviation_nsec" : 8002 },
{"send_size" : 8, "recv_size" : 1024, "total_time_nsec" : 148696000, "standard_deviation_nsec" : 10383 },
{"send_size" : 16, "recv_size" : 0, "total_time_nsec" : 59890000, "standard_deviation_nsec" : 15160 },
{"send_size" : 16, "recv_size" : 4, "total_time_nsec" : 56664000, "standard_deviation_nsec" : 4650 },
{"send_size" : 16, "recv_size" : 8, "total_time_nsec" : 57574000, "standard_deviation_nsec" : 7787 },
{"send_size" : 16, "recv_size" : 16, "total_time_nsec" : 59312000, "standard_deviation_nsec" : 8104 },
{"send_size" : 16, "recv_size" : 32, "total_time_nsec" : 59764000, "standard_deviation_nsec" : 7496 },
{"send_size" : 16, "recv_size" : 64, "total_time_nsec" : 61644000, "standard_deviation_nsec" : 8331 },
{"send_size" : 16, "recv_size" : 128, "total_time_nsec" : 66476000, "standard_deviation_nsec" : 9251 },
{"send_size" : 16, "recv_size" : 256, "total_time_nsec" : 72386000, "standard_deviation_nsec" : 8627 },
{"send_size" : 16, "recv_size" : 512, "total_time_nsec" : 87810000, "standard_deviation_nsec" : 12318 },
{"send_size" : 16, "recv_size" : 1024, "total_time_nsec" : 146918000, "standard_deviation_nsec" : 11595 },
{"send_size" : 32, "recv_size" : 0, "total_time_nsec" : 56493000, "standard_deviation_nsec" : 6577 },
{"send_size" : 32, "recv_size" : 4, "total_time_nsec" : 57069000, "standard_deviation_nsec" : 5931 },
{"send_size" : 32, "recv_size" : 8, "total_time_nsec" : 57563000, "standard_deviation_nsec" : 8157 },
{"send_size" : 32, "recv_size" : 16, "total_time_nsec" : 59694000, "standard_deviation_nsec" : 6932 },
{"send_size" : 32, "recv_size" : 32, "total_time_nsec" : 60852000, "standard_deviation_nsec" : 8010 },
{"send_size" : 32, "recv_size" : 64, "total_time_nsec" : 61926000, "standard_deviation_nsec" : 8372 },
{"send_size" : 32, "recv_size" : 128, "total_time_nsec" : 66734000, "standard_deviation_nsec" : 8047 },
{"send_size" : 32, "recv_size" : 256, "total_time_nsec" : 72000000, "standard_deviation_nsec" : 8103 },
{"send_size" : 32, "recv_size" : 512, "total_time_nsec" : 88268000, "standard_deviation_nsec" : 12289 },
{"send_size" : 32, "recv_size" : 1024, "total_time_nsec" : 147946000, "standard_deviation_nsec" : 12122 },
{"send_size" : 64, "recv_size" : 0, "total_time_nsec" : 58126000, "standard_deviation_nsec" : 5895 },
{"send_size" : 64, "recv_size" : 4, "total_time_nsec" : 58927000, "standard_deviation_nsec" : 8933 },
{"send_size" : 64, "recv_size" : 8, "total_time_nsec" : 58163000, "standard_deviation_nsec" : 6663 },
{"send_size" : 64, "recv_size" : 16, "total_time_nsec" : 59901000, "standard_deviation_nsec" : 8340 },
{"send_size" : 64, "recv_size" : 32, "total_time_nsec" : 60365000, "standard_deviation_nsec" : 6319 },
{"send_size" : 64, "recv_size" : 64, "total_time_nsec" : 61776000, "standard_deviation_nsec" : 7461 },
{"send_size" : 64, "recv_size" : 128, "total_time_nsec" : 66984000, "standard_deviation_nsec" : 6810 },
{"send_size" : 64, "recv_size" : 256, "total_time_nsec" : 73913000, "standard_deviation_nsec" : 8826 },
{"send_size" : 64, "recv_size" : 512, "total_time_nsec" : 88134000, "standard_deviation_nsec" : 8356 },
{"send_size" : 64, "recv_size" : 1024, "total_time_nsec" : 146932000, "standard_deviation_nsec" : 7571 },
{"send_size" : 128, "recv_size" : 0, "total_time_nsec" : 57616000, "standard_deviation_nsec" : 6158 },
{"send_size" : 128, "recv_size" : 4, "total_time_nsec" : 59091000, "standard_deviation_nsec" : 7458 },
{"send_size" : 128, "recv_size" : 8, "total_time_nsec" : 60263000, "standard_deviation_nsec" : 11999 },
{"send_size" : 128, "recv_size" : 16, "total_time_nsec" : 59238000, "standard_deviation_nsec" : 6102 },
{"send_size" : 128, "recv_size" : 32, "total_time_nsec" : 60783000, "standard_deviation_nsec" : 6244 },
{"send_size" : 128, "recv_size" : 64, "total_time_nsec" : 62975000, "standard_deviation_nsec" : 8947 },
{"send_size" : 128, "recv_size" : 128, "total_time_nsec" : 65742000, "standard_deviation_nsec" : 5907 },
{"send_size" : 128, "recv_size" : 256, "total_time_nsec" : 72402000, "standard_deviation_nsec" : 6601 },
{"send_size" : 128, "recv_size" : 512, "total_time_nsec" : 87457000, "standard_deviation_nsec" : 9004 },
{"send_size" : 128, "recv_size" : 1024, "total_time_nsec" : 148412000, "standard_deviation_nsec" : 10532 },
{"send_size" : 256, "recv_size" : 0, "total_time_nsec" : 58705000, "standard_deviation_nsec" : 7274 },
{"send_size" : 256, "recv_size" : 4, "total_time_nsec" : 58818000, "standard_deviation_nsec" : 5453 },
{"send_size" : 256, "recv_size" : 8, "total_time_nsec" : 59451000, "standard_deviation_nsec" : 6926 },
{"send_size" : 256, "recv_size" : 16, "total_time_nsec" : 60237000, "standard_deviation_nsec" : 5781 },
{"send_size" : 256, "recv_size" : 32, "total_time_nsec" : 61456000, "standard_deviation_nsec" : 5591 },
{"send_size" : 256, "recv_size" : 64, "total_time_nsec" : 62615000, "standard_deviation_nsec" : 7588 },
{"send_size" : 256, "recv_size" : 128, "total_time_nsec" : 68554000, "standard_deviation_nsec" : 7766 },
{"send_size" : 256, "recv_size" : 256, "total_time_nsec" : 74557000, "standard_deviation_nsec" : 8748 },
{"send_size" : 256, "recv_size" : 512, "total_time_nsec" : 87929000, "standard_deviation_nsec" : 9510 },
{"send_size" : 256, "recv_size" : 1024, "total_time_nsec" : 148522000, "standard_deviation_nsec" : 11394 },
{"send_size" : 512, "recv_size" : 0, "total_time_nsec" : 59697000, "standard_deviation_nsec" : 7825 },
{"send_size" : 512, "recv_size" : 4, "total_time_nsec" : 59427000, "standard_deviation_nsec" : 5706 },
{"send_size" : 512, "recv_size" : 8, "total_time_nsec" : 59538000, "standard_deviation_nsec" : 6863 },
{"send_size" : 512, "recv_size" : 16, "total_time_nsec" : 61139000, "standard_deviation_nsec" : 7645 },
{"send_size" : 512, "recv_size" : 32, "total_time_nsec" : 62203000, "standard_deviation_nsec" : 7985 },
{"send_size" : 512, "recv_size" : 64, "total_time_nsec" : 62577000, "standard_deviation_nsec" : 8118 },
{"send_size" : 512, "recv_size" : 128, "total_time_nsec" : 68722000, "standard_deviation_nsec" : 10581 },
{"send_size" : 512, "recv_size" : 256, "total_time_nsec" : 74290000, "standard_deviation_nsec" : 8931 },
{"send_size" : 512, "recv_size" : 512, "total_time_nsec" : 88635000, "standard_deviation_nsec" : 7771 },
{"send_size" : 512, "recv_size" : 1024, "total_time_nsec" : 149589000, "standard_deviation_nsec" : 11456 },
{"send_size" : 1024, "recv_size" : 0, "total_time_nsec" : 63243000, "standard_deviation_nsec" : 6331 },
{"send_size" : 1024, "recv_size" : 4, "total_time_nsec" : 64381000, "standard_deviation_nsec" : 8372 },
{"send_size" : 1024, "recv_size" : 8, "total_time_nsec" : 63481000, "standard_deviation_nsec" : 5608 },
{"send_size" : 1024, "recv_size" : 16, "total_time_nsec" : 65549000, "standard_deviation_nsec" : 8826 },
{"send_size" : 1024, "recv_size" : 32, "total_time_nsec" : 65485000, "standard_deviation_nsec" : 6822 },
{"send_size" : 1024, "recv_size" : 64, "total_time_nsec" : 67125000, "standard_deviation_nsec" : 9829 },
{"send_size" : 1024, "recv_size" : 128, "total_time_nsec" : 72680000, "standard_deviation_nsec" : 7641 },
{"send_size" : 1024, "recv_size" : 256, "total_time_nsec" : 79206000, "standard_deviation_nsec" : 9854 },
{"send_size" : 1024, "recv_size" : 512, "total_time_nsec" : 92418000, "standard_deviation_nsec" : 9107 },
{"send_size" : 1024, "recv_size" : 1024, "total_time_nsec" : 152392000, "standard_deviation_nsec" : 11124 }
]
},
"download_speed" : {
"byte_size" : 4194304,
"results" : [
{"send_size" : 0, "recv_size" : 32, "total_time_nsec" : 7735630000 },
{"send_size" : 0, "recv_size" : 64, "total_time_nsec" : 3985169000 },
{"send_size" : 0, "recv_size" : 128, "total_time_nsec" : 2128791000 },
{"send_size" : 0, "recv_size" : 256, "total_time_nsec" : 1172077000 },
{"send_size" : 0, "recv_size" : 512, "total_time_nsec" : 703833000 },
{"send_size" : 0, "recv_size" : 1024, "total_time_nsec" : 594966000 }
]
}
}
llvm-svn: 237953
e034a04e4f