diff options
Diffstat (limited to '0035-tools-ocaml-xenctrl-Use-larger-chunksize-in-domain_g.patch')
| -rw-r--r-- | 0035-tools-ocaml-xenctrl-Use-larger-chunksize-in-domain_g.patch | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/0035-tools-ocaml-xenctrl-Use-larger-chunksize-in-domain_g.patch b/0035-tools-ocaml-xenctrl-Use-larger-chunksize-in-domain_g.patch new file mode 100644 index 0000000..6c64355 --- /dev/null +++ b/0035-tools-ocaml-xenctrl-Use-larger-chunksize-in-domain_g.patch @@ -0,0 +1,41 @@ +From 5d8f9cfa166c55a308856e7b021d778350edbd6c Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Edwin=20T=C3=B6r=C3=B6k?= <edvin.torok@citrix.com> +Date: Tue, 1 Nov 2022 17:59:17 +0000 +Subject: [PATCH 35/89] tools/ocaml/xenctrl: Use larger chunksize in + domain_getinfolist +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +domain_getinfolist() is quadratic with the number of domains, because of the +behaviour of the underlying hypercall. Nevertheless, getting domain info in +blocks of 1024 is far more efficient than blocks of 2. + +In a scalability testing scenario with ~1000 VMs, a combination of this and +the previous change takes xenopsd's wallclock time in domain_getinfolist() +down from 88% to 0.02% + +Signed-off-by: Edwin Török <edvin.torok@citrix.com> +Tested-by: Pau Ruiz Safont <pau.safont@citrix.com> +Acked-by: Christian Lindig <christian.lindig@citrix.com> +(cherry picked from commit 95db09b1b154fb72fad861815ceae1f3fa49fc4e) +--- + tools/ocaml/libs/xc/xenctrl.ml | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/tools/ocaml/libs/xc/xenctrl.ml b/tools/ocaml/libs/xc/xenctrl.ml +index 85b73a7f6f..aa650533f7 100644 +--- a/tools/ocaml/libs/xc/xenctrl.ml ++++ b/tools/ocaml/libs/xc/xenctrl.ml +@@ -233,7 +233,7 @@ let rev_append_fold acc e = List.rev_append e acc + let rev_concat lst = List.fold_left rev_append_fold [] lst + + let domain_getinfolist handle first_domain = +- let nb = 2 in ++ let nb = 1024 in + let rec __getlist lst from = + (* _domain_getinfolist returns domains in reverse order, largest first *) + match _domain_getinfolist handle from nb with +-- +2.40.0 + |