Michael Pratt

I think we eventually want to support precise sampling (i.e. PEBS, `CPUCyclesPrecise` mentioned earlier). Though that could be considered more of a 'modifier' that could be set with a different...

> > I don't think it should be completely automatic, as I think users should have a way to require precision, or at least know that they aren't getting it....

Thanks for filing this! We certainly need to replace Catapult and Perfetto is the best alternative that I have seen, so overall I am very supportive of this. Regarding https://github.com/golang/go/issues/57315#issuecomment-1352369141,...

One issue I did see was that some (but not all) flow events displayed incorrectly. For example, these events somehow became a loop in Perfetto? Catapult:  Perfertto: 

> Meanwhile it would be great to know if the deep link integration itself seems okay. IMO the only thing that would have to change is the URLs if we...

> Yeah, that'd be awesome. But I think [CL 457716](https://go-review.googlesource.com/c/go/+/457716) already gets us a little bit closer. I'm able to bump the split size from 100 to 500MB like shown...

> Asking this as someone who knows very little about perfetto: does perfetto have any kind of protocol for like, streaming the trace? In other words, is there something like...

Now that 1.19.4 is cut, you can send the cherry-picks for 1.19.5 at any time.

@irfansharif sent https://go.dev/cl/387874 today which adds a `/sched/goroutine/running:nanoseconds` metric to `runtime/metrics`, which total time in `_Grunning` for the current goroutine. This is effectively equivalent to the `ReadGoroutineCPUStats` API from the...

`greplogs --dashboard -md -l -e 'FAIL: TestTransportMaxIdleConns'` [2022-12-01T21:01:03-c71d3a0/freebsd-arm-paulzhol](https://build.golang.org/log/ce2b15d62c3ab92e59346557d33cd8403e9cbdc3) [2022-11-30T17:03:21-60525dc/freebsd-amd64-race](https://build.golang.org/log/7e9b4ba0db7434014bff602ddeab0c0b31961892) [2022-11-29T22:59:16-7847260/darwin-amd64-13](https://build.golang.org/log/14c9b002437747e8eb473f2329cca6207dd1bc99) [2022-11-23T20:07:39-036696a/darwin-amd64-10_15-aws](https://build.golang.org/log/8279d723a3dae7eb573d49159062dc279878a8d6) [2022-11-23T18:23:24-4c0c0e5/freebsd-riscv64-unmatched](https://build.golang.org/log/cea5834911049ca5d8a91a713d87bdfd34e7178b) [2022-11-19T22:39:30-8205d83/darwin-amd64-aws-race](https://build.golang.org/log/59f6ac9af055953a15e02aa2e0fef831a96497d7) [2022-11-18T08:04:52-205f636/freebsd-arm-paulzhol](https://build.golang.org/log/fc258b1454f0fc99de44f2dabed0d7ef670ce35e) [2022-11-16T13:26:16-5947a07/darwin-amd64-aws-race](https://build.golang.org/log/766b5e1820d1624a8339d62c789f703b35db5443) [2022-11-08T14:54:25-6939659/darwin-amd64-12-aws](https://build.golang.org/log/df30eeec49d239cf7b92987637461590b00c87e3) [2022-11-04T22:09:36-d9cc39b/freebsd-arm-paulzhol](https://build.golang.org/log/34398b1bef4cd737a91b1d7aa381265782bd0e55) [2022-10-26T05:51:33-939f9fd/freebsd-arm-paulzhol](https://build.golang.org/log/ad7fa3c397ca3d863ace4cdad38228cfcb42847c) [2022-10-24T21:18:32-4319231/darwin-amd64-13-aws](https://build.golang.org/log/813b04e6bc63b3a89b57eaeff5d96ed18754006f) [2022-10-17T18:38:43-b65e259/freebsd-arm-paulzhol](https://build.golang.org/log/ed16e7b1de79053d1ee93053acb2ddd3b87b9904) [2022-10-12T20:23:36-e0d01b8/darwin-amd64-11-aws](https://build.golang.org/log/cf6d7cb8e4b0df18a99718394131d45ce62f4bd7) [2022-10-11T12:40:42-1b316e3/freebsd-arm-paulzhol](https://build.golang.org/log/e9d199bb73ea80f2985ee2f777d93208ba71f927) [2022-10-11T12:40:42-1b316e3/windows-amd64-newcc-race](https://build.golang.org/log/4cb676c430a674948a35935d698ab7126b32d9e0) [2022-10-11T04:02:34-0ca3553/windows-amd64-race](https://build.golang.org/log/9aab7b63056b743e8f7b017805bb927aa9db5ecf) [2022-10-10T21:39:15-fce4496/freebsd-amd64-race](https://build.golang.org/log/65143944f4912312554fc137b7cc2b204a987501)