From: sashiko-bot@kernel.org
To: "Jacob Lefkowitz" <jlefkowi@akamai.com>
Cc: linux-perf-users@vger.kernel.org
Subject: Re: [PATCH v2 2/2] perf jevents: add amd specific device table entry metrics
Date: Mon, 02 Nov 2026 21:18:30 +0000 [thread overview]
Message-ID: <sashiko-outbox-194188@kernel.org> (raw)
In-Reply-To: <20261102-perf-tools-next-v2-2-4d237f886710@akamai.com>
> From: Jacob Lefkowitz <jlefkowi@akamai.com>
>
> Adds AMD specific device table entry metrics to perf jevents.
> These metrics are only allowed on Zen 2+ processors and are
> implemented using the 'amd_iommu' PMU events.
>
> The list of metrics added are:
> - lpm_iommu_dte_miss_rate
> - lpm_iommu_dte_lookups
>
> The metrics were tested with the standard 'sleep' workload:
>
> perf stat -M iommudte --per-socket --metric-only -j -a -- sleep 10
> {"socket" : "S0", "counters" : 8,
> "lookups/s lpm_iommu_dte_lookups" : "4117.3",
> "% lpm_iommu_dte_miss_rate" : "0.0"}
> {"socket" : "S1", "counters" : 0,
> "lookups/s lpm_iommu_dte_lookups" : "none",
> "% lpm_iommu_dte_miss_rate" : "none"}
>
> Signed-off-by: Jacob Lefkowitz <jlefkowi@akamai.com>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261102-perf-tools-next-v2-0-4d237f886710@akamai.com?part=2
prev parent reply other threads:[~2026-11-02 21:18 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-02 21:14 [PATCH v2 0/2] perf jevents: Add IOMMU PTW & device entry metrics Jacob Lefkowitz via B4 Relay
2026-11-02 21:14 ` [PATCH v2 1/2] perf jevents: add iommu page table walk metrics Jacob Lefkowitz via B4 Relay
2026-11-02 21:22 ` sashiko-bot
2026-11-02 21:14 ` [PATCH v2 2/2] perf jevents: add amd specific device table entry metrics Jacob Lefkowitz via B4 Relay
2026-11-02 21:18 ` sashiko-bot [this message]
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