英文:
golang tool pprof not working properly - same broken output regardless of profiling target
问题
我之前使用pprof工具没有问题，它的表现非常好 - 现在无论我如何进行分析，都会看到以下的输出：
在这个例子中，被分析的应用程序可能有40多个函数调用，而更复杂的应用程序也会产生类似的调用图，无论是CPU还是内存分析。
我尝试分析的应用程序都是Web应用程序，我每次分析一分钟，并使用wrk生成200,000,000+的请求，所有请求都返回数据和2xx响应。
pprof突然在几天前停止工作，我在尝试解决这个问题时最近升级到了El Capitan，但结果是一样的。
注意：这不仅仅是调用图 - 调用list或top命令也会产生类似贫瘠的结果，但应用程序本身工作正常：
(pprof) top269.97kB of 269.97kB total ( 100%)flat flat% sum% cum cum%269.97kB 100% 100% 269.97kB 100%(pprof)
我使用的是以下包："github.com/davecheney/profile"，使用的是go v1.5.1
为了清楚起见，这是我生成分析报告的步骤：
我将上述包导入到main.go中，并将以下代码放在main函数的顶部：
defer profile.Start(profile.MemProfile).Stop()
然后构建二进制文件并运行它：
go build -o orig /Users/danielwall/www/netlistener/application/adrequest.go /Users/danielwall/www/netlistener/application/cookie.go /Users/danielwall/www/netlistener/application/header.go /Users/danielwall/www/netlistener/application/lex.go /Users/danielwall/www/netlistener/application/main.go /Users/danielwall/www/netlistener/application/publisher_ids.go /Users/danielwall/www/netlistener/application/request.go /Users/danielwall/www/netlistener/application/response.go /Users/danielwall/www/netlistener/application/server.go /Users/danielwall/www/netlistener/application/sniff.go /Users/danielwall/www/netlistener/application/status.go /Users/danielwall/www/netlistener/application/transfer.go./orig
然后我会看到如下输出：
2015/11/16 11:39:49 profile: memory profiling enabled, /var/folders/26/2sj70_sn72l_93j7tf6r07gr0000gn/T/profile614358295/mem.pprof
然后我从另一个终端操作应用程序：
wrk -d60 -c10 -H "X-Device: desktop" -H "X-Country-Code: GB" "http://localhost:8189/app?id=111&schema=xml2&ad_type=auto&url=http://test.com/&category=bob"Running 1m test @ http://localhost:8189/app?id=111&schema=xml2&ad_type=auto&url=http://test.com/&category=bob2 threads and 10 connectionsThread Stats Avg Stdev Max +/- StdevLatency 414.09us 0.92ms 55.36ms 95.66%Req/Sec 17.57k 3.19k 22.59k 76.00%2097764 requests in 1.00m, 684.20MB readRequests/sec: 34958.03Transfer/sec: 11.40MB
60秒后，我回去检查我的分析报告：
^C2015/11/16 12:05:20 profile: caught interrupt, stopping profilesgo tool pprof /var/folders/26/2sj70_sn72l_93j7tf6r07gr0000gn/T/profile614358295/mem.pprof
有什么想法可能会发生这种情况，或者我可以从哪里开始进行故障排除/解决？
欢迎任何帮助和建议。
英文:
I've previously used the pprof tool without issue and it worked great - now I see output like the following no matter what I profile:
the application being profiled in this example probably makes 40+ function calls and even more complex apps are producing similar callgraphs for both cpu and memprofiling.
The apps Im trying to profile are all web applications, I am profiling them for one minute at a time and using wrk to generate 200,000,000+ requests = all returning data and a 2xx response
pprof suddenly stopped working a few days ago running osx yosemite - in an attempt to resolve the issue I recently upgraded to el capitan but result is the same.
Note: this is not just call graphs - calling list or top command produce similarly barren results but the apps themselves work fine:
(pprof) top269.97kB of 269.97kB total ( 100%)flat flat% sum% cum cum%269.97kB 100% 100% 269.97kB 100%(pprof)
I am using the following package: "github.com/davecheney/profile" with go v1.5.1
For clarity, here's what I'm doing to generate the profiles::
I import the above package into main.go and place the following at the top of my main func:
defer profile.Start(profile.MemProfile).Stop()
I then build the binary and run it:
go build -o orig /Users/danielwall/www/netlistener/application/adrequest.go /Users/danielwall/www/netlistener/application/cookie.go /Users/danielwall/www/netlistener/application/header.go /Users/danielwall/www/netlistener/application/lex.go /Users/danielwall/www/netlistener/application/main.go /Users/danielwall/www/netlistener/application/publisher_ids.go /Users/danielwall/www/netlistener/application/request.go /Users/danielwall/www/netlistener/application/response.go /Users/danielwall/www/netlistener/application/server.go /Users/danielwall/www/netlistener/application/sniff.go /Users/danielwall/www/netlistener/application/status.go /Users/danielwall/www/netlistener/application/transfer.go./orig
I then see output like this:
2015/11/16 11:39:49 profile: memory profiling enabled, /var/folders/26/2sj70_sn72l_93j7tf6r07gr0000gn/T/profile614358295/mem.pprof
Now I work the app from another terminal :
wrk -d60 -c10 -H "X-Device: desktop" -H "X-Country-Code: GB" "http://localhost:8189/app?id=111&schema=xml2&ad_type=auto&url=http://test.com/&category=bob"Running 1m test @ http://localhost:8189/app?id=111&schema=xml2&ad_type=auto&url=http://test.com/&category=bob2 threads and 10 connectionsThread Stats Avg Stdev Max +/- StdevLatency 414.09us 0.92ms 55.36ms 95.66%Req/Sec 17.57k 3.19k 22.59k 76.00%2097764 requests in 1.00m, 684.20MB readRequests/sec: 34958.03Transfer/sec: 11.40MB
After 60 seconds, I go back to check my profile:
^C2015/11/16 12:05:20 profile: caught interrupt, stopping profilesgo tool pprof /var/folders/26/2sj70_sn72l_93j7tf6r07gr0000gn/T/profile614358295/mem.pprof
Any ideas what might be happening here or where I could start with trouble shooting/solving this?
Any help suggestions welcome.
答案1
得分: 10
您的go tool pprof调用缺少二进制文件本身。请按以下方式调用：
go tool pprof ./orig /path/to/profile.pprof
英文:
Your go tool pprof call is missing the binary itself. Call it as
go tool pprof ./orig /path/to/profile.pprof
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