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tsweb/varz: export GC CPU fraction gauge

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We were missing this metric, but it can be important for some workloads.

Varz memstats output allocation cost reduced from 30 allocs per
invocation to 1 alloc per invocation.

Updates tailscale/corp#28033

Signed-off-by: James Tucker <james@tailscale.com>
Co-authored-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
James Tucker
2025-04-28 09:04:02 -07:00
committed by James Tucker
parent 189e03e741
commit b95e8bf4a1
5 changed files with 128 additions and 17 deletions
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cmd/tailscale/depaware.txt
+1 -1
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@@ -211,7 +211,7 @@ tailscale.com/cmd/tailscale dependencies: (generated by github.com/tailscale/dep
golang.org/x/crypto/nacl/secretbox from golang.org/x/crypto/nacl/box
golang.org/x/crypto/pbkdf2 from software.sslmate.com/src/go-pkcs12
golang.org/x/crypto/salsa20/salsa from golang.org/x/crypto/nacl/box+
W golang.org/x/exp/constraints from github.com/dblohm7/wingoes/pe+
golang.org/x/exp/constraints from github.com/dblohm7/wingoes/pe+
golang.org/x/exp/maps from tailscale.com/util/syspolicy/internal/metrics+
golang.org/x/net/bpf from github.com/mdlayher/netlink+
golang.org/x/net/dns/dnsmessage from net+