From: Eric Wong <e@80x24.org>
To: mwrap-public@80x24.org
Subject: [PATCH 1/2] httpd: add notes about arenas and object heaps
Date: Mon, 9 Jan 2023 06:21:35 +0000 [thread overview]
Message-ID: <20230109062136.2543690-2-e@80x24.org> (raw)
In-Reply-To: <20230109062136.2543690-1-e@80x24.org>
We don't users being confused if an innocuous-looking
line of code allocates unnexpectedly large values.
---
ext/mwrap/httpd.h | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/ext/mwrap/httpd.h b/ext/mwrap/httpd.h
index 17fb187..fe4fe2f 100644
--- a/ext/mwrap/httpd.h
+++ b/ext/mwrap/httpd.h
@@ -600,7 +600,12 @@ static enum mw_qev each_at(struct mw_h1 *h1, struct mw_h1req *h1r)
size, h->as.live.gen, h->real);
}
rcu_read_unlock();
- FPUTS("</table></body></html>", fp);
+ FPUTS("</table><pre>\nNotes:\n"
+"* 16344-byte (64-bit) or 16344-byte (32-bit) allocations in\n"
+" Ruby <= 3.0 aligned to 0x4000 are likely for object heap slots.\n"
+"* 4080-byte allocations in Perl 5 are likely for arenas\n"
+" (set via the PERL_ARENA_SIZE compile-time macro)"
+"</pre></body></html>", fp);
return h1_200(h1, &html, TYPE_HTML);
}
next prev parent reply other threads:[~2023-01-09 6:21 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-09 6:21 [PATCH 0/2] refining the httpd interface Eric Wong
2023-01-09 6:21 ` Eric Wong [this message]
2023-01-09 6:21 ` [PATCH 2/2] httpd: add CSV download link to /each/$MIN HTML Eric Wong
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