Date: Tue, 11 Jul 2023 03:11:52 GMT From: Peter Grehan <grehan@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 43ed91e00bbb - main - igc: Increase default per-queue interrupt rate to 20000. Message-ID: <202307110311.36B3BqfH031379@gitrepo.freebsd.org>
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The branch main has been updated by grehan: URL: https://cgit.FreeBSD.org/src/commit/?id=43ed91e00bbb1c7edadbe1c210d8e57d66a3badd commit 43ed91e00bbb1c7edadbe1c210d8e57d66a3badd Author: Peter Grehan <grehan@FreeBSD.org> AuthorDate: 2023-07-07 08:23:42 +0000 Commit: Peter Grehan <grehan@FreeBSD.org> CommitDate: 2023-07-11 03:29:37 +0000 igc: Increase default per-queue interrupt rate to 20000. The default per-queue packet rate of 8000 will cause packet loss when forwarding at 2.5G with a single stream, as is common when using e.g. iperf3 to test a platform. Bump this to 20000 (the "low latency" value in the Linux driver) which avoids packet loss for this type of test. Future work will use adaptive interrupt rate in a similar fashion to the ixgbe driver. Sponsored by: Rubicon Communications, LLC ("Netgate") Reviewed by: erj, kp MFC after: 3 weeks Differential Revision: https://reviews.freebsd.org/D40904 --- sys/dev/igc/if_igc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sys/dev/igc/if_igc.c b/sys/dev/igc/if_igc.c index 60f796010232..1ede99eee4ae 100644 --- a/sys/dev/igc/if_igc.c +++ b/sys/dev/igc/if_igc.c @@ -271,7 +271,7 @@ SYSCTL_INT(_hw_igc, OID_AUTO, eee_setting, CTLFLAG_RDTUN, &igc_eee_setting, 0, /* ** Tuneable Interrupt rate */ -static int igc_max_interrupt_rate = 8000; +static int igc_max_interrupt_rate = 20000; SYSCTL_INT(_hw_igc, OID_AUTO, max_interrupt_rate, CTLFLAG_RDTUN, &igc_max_interrupt_rate, 0, "Maximum interrupts per second");
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