uwsgi-request-time

uwsgi-request-time.py

#! /usr/bin/env python
import os
import sys 
import signal 

stap_script = """ 
global counter
global start = 0 
global end = 0
probe process("/usr/bin/uwsgi").function("uwsgi_request_wsgi")
{ 
    if (end == 0) {
        start = gettimeofday_ns()
        end = 1
    }  else {
        counter <<< (gettimeofday_ns() - start）
        end = 0
    }
}

probe end {
    printf("\\naverage: %ldns\\n", @avg(counter))
    printf("max: %ldns\\n", @max(counter))
    printf("min: %ldns\\n", @min(counter))
    printf("sum: %ldns\\n", @sum(counter))
    printf("count: %ld\\n", @count(counter))
}

"""

def sigint_handler(signum, frame):
    exit(0)

def print_usage():
    print "uwsgi-stacks.py pid"

def main():
    tmp = "stap.tmp" 
    signal.signal(signal.SIGINT, sigint_handler) 
    with open(tmp, "w+") as f:   
        f.write(stap_script) 
    if os.fork() == 0: 
        os.execvp("stap", ['stap', "-v", "-o", "uwsgi.stacks", "-d", "/lib64/libc.so.6", "-D", "MAXERRORS=10", "-s", "32", "-D", "MAXTRACE=100", "-D", "MAXSTRINGLEN=4096", "-D", "MAXMAPENTRIES=10240", "-D", "MAXACTION=10000", "-D", "STP_OVERLOAD_THRESHOLD=50000000", "%s" % tmp ]) 
    os.wait() 

if __name__ == "__main__": 
    main()